^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * GCM: Galois/Counter Mode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2007 Nokia Siemens Networks - Mikko Herranen <mh1@iki.fi>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <crypto/gf128mul.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <crypto/internal/aead.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <crypto/internal/skcipher.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <crypto/internal/hash.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <crypto/null.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <crypto/scatterwalk.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <crypto/gcm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <crypto/hash.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) struct gcm_instance_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct crypto_skcipher_spawn ctr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) struct crypto_ahash_spawn ghash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct crypto_gcm_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct crypto_skcipher *ctr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) struct crypto_ahash *ghash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) struct crypto_rfc4106_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) struct crypto_aead *child;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) u8 nonce[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) struct crypto_rfc4106_req_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) struct scatterlist src[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) struct scatterlist dst[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) struct aead_request subreq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) struct crypto_rfc4543_instance_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) struct crypto_aead_spawn aead;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) struct crypto_rfc4543_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) struct crypto_aead *child;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) struct crypto_sync_skcipher *null;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) u8 nonce[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) struct crypto_rfc4543_req_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) struct aead_request subreq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) struct crypto_gcm_ghash_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) unsigned int cryptlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) struct scatterlist *src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) int (*complete)(struct aead_request *req, u32 flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) struct crypto_gcm_req_priv_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) u8 iv[16];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) u8 auth_tag[16];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) u8 iauth_tag[16];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) struct scatterlist src[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) struct scatterlist dst[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) struct scatterlist sg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) struct crypto_gcm_ghash_ctx ghash_ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) union {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) struct ahash_request ahreq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) struct skcipher_request skreq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) } u;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) static struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) u8 buf[16];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) struct scatterlist sg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) } *gcm_zeroes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) static int crypto_rfc4543_copy_src_to_dst(struct aead_request *req, bool enc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) static inline struct crypto_gcm_req_priv_ctx *crypto_gcm_reqctx(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) struct aead_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) unsigned long align = crypto_aead_alignmask(crypto_aead_reqtfm(req));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return (void *)PTR_ALIGN((u8 *)aead_request_ctx(req), align + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) static int crypto_gcm_setkey(struct crypto_aead *aead, const u8 *key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) unsigned int keylen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) struct crypto_gcm_ctx *ctx = crypto_aead_ctx(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) struct crypto_ahash *ghash = ctx->ghash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) struct crypto_skcipher *ctr = ctx->ctr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) be128 hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) u8 iv[16];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) struct crypto_wait wait;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) struct scatterlist sg[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) struct skcipher_request req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) } *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) crypto_skcipher_clear_flags(ctr, CRYPTO_TFM_REQ_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) crypto_skcipher_set_flags(ctr, crypto_aead_get_flags(aead) &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) CRYPTO_TFM_REQ_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) err = crypto_skcipher_setkey(ctr, key, keylen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) data = kzalloc(sizeof(*data) + crypto_skcipher_reqsize(ctr),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (!data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) crypto_init_wait(&data->wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) sg_init_one(data->sg, &data->hash, sizeof(data->hash));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) skcipher_request_set_tfm(&data->req, ctr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) skcipher_request_set_callback(&data->req, CRYPTO_TFM_REQ_MAY_SLEEP |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) CRYPTO_TFM_REQ_MAY_BACKLOG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) crypto_req_done,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) &data->wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) skcipher_request_set_crypt(&data->req, data->sg, data->sg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) sizeof(data->hash), data->iv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) err = crypto_wait_req(crypto_skcipher_encrypt(&data->req),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) &data->wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) crypto_ahash_clear_flags(ghash, CRYPTO_TFM_REQ_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) crypto_ahash_set_flags(ghash, crypto_aead_get_flags(aead) &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) CRYPTO_TFM_REQ_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) err = crypto_ahash_setkey(ghash, (u8 *)&data->hash, sizeof(be128));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) kfree_sensitive(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) static int crypto_gcm_setauthsize(struct crypto_aead *tfm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) unsigned int authsize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) return crypto_gcm_check_authsize(authsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) static void crypto_gcm_init_common(struct aead_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) __be32 counter = cpu_to_be32(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) struct scatterlist *sg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) memset(pctx->auth_tag, 0, sizeof(pctx->auth_tag));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) memcpy(pctx->iv, req->iv, GCM_AES_IV_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) memcpy(pctx->iv + GCM_AES_IV_SIZE, &counter, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) sg_init_table(pctx->src, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) sg_set_buf(pctx->src, pctx->auth_tag, sizeof(pctx->auth_tag));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) sg = scatterwalk_ffwd(pctx->src + 1, req->src, req->assoclen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) if (sg != pctx->src + 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) sg_chain(pctx->src, 2, sg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) if (req->src != req->dst) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) sg_init_table(pctx->dst, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) sg_set_buf(pctx->dst, pctx->auth_tag, sizeof(pctx->auth_tag));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) sg = scatterwalk_ffwd(pctx->dst + 1, req->dst, req->assoclen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) if (sg != pctx->dst + 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) sg_chain(pctx->dst, 2, sg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) static void crypto_gcm_init_crypt(struct aead_request *req,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) unsigned int cryptlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) struct crypto_aead *aead = crypto_aead_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) struct crypto_gcm_ctx *ctx = crypto_aead_ctx(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) struct skcipher_request *skreq = &pctx->u.skreq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) struct scatterlist *dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) dst = req->src == req->dst ? pctx->src : pctx->dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) skcipher_request_set_tfm(skreq, ctx->ctr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) skcipher_request_set_crypt(skreq, pctx->src, dst,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) cryptlen + sizeof(pctx->auth_tag),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) pctx->iv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) static inline unsigned int gcm_remain(unsigned int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) len &= 0xfU;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) return len ? 16 - len : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) static void gcm_hash_len_done(struct crypto_async_request *areq, int err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) static int gcm_hash_update(struct aead_request *req,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) crypto_completion_t compl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) struct scatterlist *src,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) unsigned int len, u32 flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) struct ahash_request *ahreq = &pctx->u.ahreq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) ahash_request_set_callback(ahreq, flags, compl, req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) ahash_request_set_crypt(ahreq, src, NULL, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) return crypto_ahash_update(ahreq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) static int gcm_hash_remain(struct aead_request *req,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) unsigned int remain,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) crypto_completion_t compl, u32 flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) return gcm_hash_update(req, compl, &gcm_zeroes->sg, remain, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) static int gcm_hash_len(struct aead_request *req, u32 flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) struct ahash_request *ahreq = &pctx->u.ahreq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) be128 lengths;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) lengths.a = cpu_to_be64(req->assoclen * 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) lengths.b = cpu_to_be64(gctx->cryptlen * 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) memcpy(pctx->iauth_tag, &lengths, 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) sg_init_one(&pctx->sg, pctx->iauth_tag, 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) ahash_request_set_callback(ahreq, flags, gcm_hash_len_done, req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) ahash_request_set_crypt(ahreq, &pctx->sg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) pctx->iauth_tag, sizeof(lengths));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) return crypto_ahash_finup(ahreq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) static int gcm_hash_len_continue(struct aead_request *req, u32 flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) return gctx->complete(req, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) static void gcm_hash_len_done(struct crypto_async_request *areq, int err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) struct aead_request *req = areq->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) err = gcm_hash_len_continue(req, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) if (err == -EINPROGRESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) aead_request_complete(req, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) static int gcm_hash_crypt_remain_continue(struct aead_request *req, u32 flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) return gcm_hash_len(req, flags) ?:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) gcm_hash_len_continue(req, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) static void gcm_hash_crypt_remain_done(struct crypto_async_request *areq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) int err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) struct aead_request *req = areq->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) err = gcm_hash_crypt_remain_continue(req, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) if (err == -EINPROGRESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) aead_request_complete(req, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) static int gcm_hash_crypt_continue(struct aead_request *req, u32 flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) unsigned int remain;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) remain = gcm_remain(gctx->cryptlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) if (remain)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) return gcm_hash_remain(req, remain,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) gcm_hash_crypt_remain_done, flags) ?:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) gcm_hash_crypt_remain_continue(req, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) return gcm_hash_crypt_remain_continue(req, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) static void gcm_hash_crypt_done(struct crypto_async_request *areq, int err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) struct aead_request *req = areq->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) err = gcm_hash_crypt_continue(req, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) if (err == -EINPROGRESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) aead_request_complete(req, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) static int gcm_hash_assoc_remain_continue(struct aead_request *req, u32 flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) if (gctx->cryptlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) return gcm_hash_update(req, gcm_hash_crypt_done,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) gctx->src, gctx->cryptlen, flags) ?:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) gcm_hash_crypt_continue(req, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) return gcm_hash_crypt_remain_continue(req, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) static void gcm_hash_assoc_remain_done(struct crypto_async_request *areq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) int err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) struct aead_request *req = areq->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) err = gcm_hash_assoc_remain_continue(req, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) if (err == -EINPROGRESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) aead_request_complete(req, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) static int gcm_hash_assoc_continue(struct aead_request *req, u32 flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) unsigned int remain;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) remain = gcm_remain(req->assoclen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) if (remain)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) return gcm_hash_remain(req, remain,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) gcm_hash_assoc_remain_done, flags) ?:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) gcm_hash_assoc_remain_continue(req, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) return gcm_hash_assoc_remain_continue(req, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) static void gcm_hash_assoc_done(struct crypto_async_request *areq, int err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) struct aead_request *req = areq->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) err = gcm_hash_assoc_continue(req, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) if (err == -EINPROGRESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) aead_request_complete(req, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) static int gcm_hash_init_continue(struct aead_request *req, u32 flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) if (req->assoclen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) return gcm_hash_update(req, gcm_hash_assoc_done,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) req->src, req->assoclen, flags) ?:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) gcm_hash_assoc_continue(req, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) return gcm_hash_assoc_remain_continue(req, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) static void gcm_hash_init_done(struct crypto_async_request *areq, int err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) struct aead_request *req = areq->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) err = gcm_hash_init_continue(req, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) if (err == -EINPROGRESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) aead_request_complete(req, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) static int gcm_hash(struct aead_request *req, u32 flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) struct ahash_request *ahreq = &pctx->u.ahreq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) struct crypto_gcm_ctx *ctx = crypto_aead_ctx(crypto_aead_reqtfm(req));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) ahash_request_set_tfm(ahreq, ctx->ghash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) ahash_request_set_callback(ahreq, flags, gcm_hash_init_done, req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) return crypto_ahash_init(ahreq) ?:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) gcm_hash_init_continue(req, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) static int gcm_enc_copy_hash(struct aead_request *req, u32 flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) struct crypto_aead *aead = crypto_aead_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) u8 *auth_tag = pctx->auth_tag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) crypto_xor(auth_tag, pctx->iauth_tag, 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) scatterwalk_map_and_copy(auth_tag, req->dst,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) req->assoclen + req->cryptlen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) crypto_aead_authsize(aead), 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) static int gcm_encrypt_continue(struct aead_request *req, u32 flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) gctx->src = sg_next(req->src == req->dst ? pctx->src : pctx->dst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) gctx->cryptlen = req->cryptlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) gctx->complete = gcm_enc_copy_hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) return gcm_hash(req, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) static void gcm_encrypt_done(struct crypto_async_request *areq, int err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) struct aead_request *req = areq->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) err = gcm_encrypt_continue(req, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) if (err == -EINPROGRESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) aead_request_complete(req, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) static int crypto_gcm_encrypt(struct aead_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) struct skcipher_request *skreq = &pctx->u.skreq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) u32 flags = aead_request_flags(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) crypto_gcm_init_common(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) crypto_gcm_init_crypt(req, req->cryptlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) skcipher_request_set_callback(skreq, flags, gcm_encrypt_done, req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) return crypto_skcipher_encrypt(skreq) ?:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) gcm_encrypt_continue(req, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) static int crypto_gcm_verify(struct aead_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) struct crypto_aead *aead = crypto_aead_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) u8 *auth_tag = pctx->auth_tag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) u8 *iauth_tag = pctx->iauth_tag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) unsigned int authsize = crypto_aead_authsize(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) unsigned int cryptlen = req->cryptlen - authsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) crypto_xor(auth_tag, iauth_tag, 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) scatterwalk_map_and_copy(iauth_tag, req->src,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) req->assoclen + cryptlen, authsize, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) return crypto_memneq(iauth_tag, auth_tag, authsize) ? -EBADMSG : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) static void gcm_decrypt_done(struct crypto_async_request *areq, int err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) struct aead_request *req = areq->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) err = crypto_gcm_verify(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) aead_request_complete(req, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) static int gcm_dec_hash_continue(struct aead_request *req, u32 flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) struct skcipher_request *skreq = &pctx->u.skreq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) crypto_gcm_init_crypt(req, gctx->cryptlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) skcipher_request_set_callback(skreq, flags, gcm_decrypt_done, req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) return crypto_skcipher_decrypt(skreq) ?: crypto_gcm_verify(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) static int crypto_gcm_decrypt(struct aead_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) struct crypto_aead *aead = crypto_aead_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) unsigned int authsize = crypto_aead_authsize(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) unsigned int cryptlen = req->cryptlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) u32 flags = aead_request_flags(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) cryptlen -= authsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) crypto_gcm_init_common(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) gctx->src = sg_next(pctx->src);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) gctx->cryptlen = cryptlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) gctx->complete = gcm_dec_hash_continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) return gcm_hash(req, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) static int crypto_gcm_init_tfm(struct crypto_aead *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) struct aead_instance *inst = aead_alg_instance(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) struct gcm_instance_ctx *ictx = aead_instance_ctx(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) struct crypto_gcm_ctx *ctx = crypto_aead_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) struct crypto_skcipher *ctr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) struct crypto_ahash *ghash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) unsigned long align;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) ghash = crypto_spawn_ahash(&ictx->ghash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) if (IS_ERR(ghash))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) return PTR_ERR(ghash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) ctr = crypto_spawn_skcipher(&ictx->ctr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) err = PTR_ERR(ctr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) if (IS_ERR(ctr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) goto err_free_hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) ctx->ctr = ctr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) ctx->ghash = ghash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) align = crypto_aead_alignmask(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) align &= ~(crypto_tfm_ctx_alignment() - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) crypto_aead_set_reqsize(tfm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) align + offsetof(struct crypto_gcm_req_priv_ctx, u) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) max(sizeof(struct skcipher_request) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) crypto_skcipher_reqsize(ctr),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) sizeof(struct ahash_request) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) crypto_ahash_reqsize(ghash)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) err_free_hash:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) crypto_free_ahash(ghash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) static void crypto_gcm_exit_tfm(struct crypto_aead *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) struct crypto_gcm_ctx *ctx = crypto_aead_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) crypto_free_ahash(ctx->ghash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) crypto_free_skcipher(ctx->ctr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) static void crypto_gcm_free(struct aead_instance *inst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) struct gcm_instance_ctx *ctx = aead_instance_ctx(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) crypto_drop_skcipher(&ctx->ctr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) crypto_drop_ahash(&ctx->ghash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) kfree(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) static int crypto_gcm_create_common(struct crypto_template *tmpl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) struct rtattr **tb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) const char *ctr_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) const char *ghash_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) u32 mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) struct aead_instance *inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) struct gcm_instance_ctx *ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) struct skcipher_alg *ctr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) struct hash_alg_common *ghash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_AEAD, &mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) if (!inst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) ctx = aead_instance_ctx(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) err = crypto_grab_ahash(&ctx->ghash, aead_crypto_instance(inst),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) ghash_name, 0, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) ghash = crypto_spawn_ahash_alg(&ctx->ghash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) if (strcmp(ghash->base.cra_name, "ghash") != 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) ghash->digestsize != 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) err = crypto_grab_skcipher(&ctx->ctr, aead_crypto_instance(inst),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) ctr_name, 0, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) ctr = crypto_spawn_skcipher_alg(&ctx->ctr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) /* The skcipher algorithm must be CTR mode, using 16-byte blocks. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) if (strncmp(ctr->base.cra_name, "ctr(", 4) != 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) crypto_skcipher_alg_ivsize(ctr) != 16 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) ctr->base.cra_blocksize != 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) err = -ENAMETOOLONG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) "gcm(%s", ctr->base.cra_name + 4) >= CRYPTO_MAX_ALG_NAME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) if (snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) "gcm_base(%s,%s)", ctr->base.cra_driver_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) ghash->base.cra_driver_name) >=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) CRYPTO_MAX_ALG_NAME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) inst->alg.base.cra_priority = (ghash->base.cra_priority +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) ctr->base.cra_priority) / 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) inst->alg.base.cra_blocksize = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) inst->alg.base.cra_alignmask = ghash->base.cra_alignmask |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) ctr->base.cra_alignmask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) inst->alg.base.cra_ctxsize = sizeof(struct crypto_gcm_ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) inst->alg.ivsize = GCM_AES_IV_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) inst->alg.chunksize = crypto_skcipher_alg_chunksize(ctr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) inst->alg.maxauthsize = 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) inst->alg.init = crypto_gcm_init_tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) inst->alg.exit = crypto_gcm_exit_tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) inst->alg.setkey = crypto_gcm_setkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) inst->alg.setauthsize = crypto_gcm_setauthsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) inst->alg.encrypt = crypto_gcm_encrypt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) inst->alg.decrypt = crypto_gcm_decrypt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) inst->free = crypto_gcm_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) err = aead_register_instance(tmpl, inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) err_free_inst:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) crypto_gcm_free(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) static int crypto_gcm_create(struct crypto_template *tmpl, struct rtattr **tb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) const char *cipher_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) char ctr_name[CRYPTO_MAX_ALG_NAME];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) cipher_name = crypto_attr_alg_name(tb[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) if (IS_ERR(cipher_name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) return PTR_ERR(cipher_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) if (snprintf(ctr_name, CRYPTO_MAX_ALG_NAME, "ctr(%s)", cipher_name) >=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) CRYPTO_MAX_ALG_NAME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) return -ENAMETOOLONG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) return crypto_gcm_create_common(tmpl, tb, ctr_name, "ghash");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) static int crypto_gcm_base_create(struct crypto_template *tmpl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) struct rtattr **tb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) const char *ctr_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) const char *ghash_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) ctr_name = crypto_attr_alg_name(tb[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) if (IS_ERR(ctr_name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) return PTR_ERR(ctr_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) ghash_name = crypto_attr_alg_name(tb[2]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) if (IS_ERR(ghash_name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) return PTR_ERR(ghash_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) return crypto_gcm_create_common(tmpl, tb, ctr_name, ghash_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) static int crypto_rfc4106_setkey(struct crypto_aead *parent, const u8 *key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) unsigned int keylen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) struct crypto_rfc4106_ctx *ctx = crypto_aead_ctx(parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) struct crypto_aead *child = ctx->child;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) if (keylen < 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) keylen -= 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) memcpy(ctx->nonce, key + keylen, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) crypto_aead_clear_flags(child, CRYPTO_TFM_REQ_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) crypto_aead_set_flags(child, crypto_aead_get_flags(parent) &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) CRYPTO_TFM_REQ_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) return crypto_aead_setkey(child, key, keylen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) static int crypto_rfc4106_setauthsize(struct crypto_aead *parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) unsigned int authsize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) struct crypto_rfc4106_ctx *ctx = crypto_aead_ctx(parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) err = crypto_rfc4106_check_authsize(authsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) return crypto_aead_setauthsize(ctx->child, authsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) static struct aead_request *crypto_rfc4106_crypt(struct aead_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) struct crypto_rfc4106_req_ctx *rctx = aead_request_ctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) struct crypto_aead *aead = crypto_aead_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) struct crypto_rfc4106_ctx *ctx = crypto_aead_ctx(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) struct aead_request *subreq = &rctx->subreq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) struct crypto_aead *child = ctx->child;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) struct scatterlist *sg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) u8 *iv = PTR_ALIGN((u8 *)(subreq + 1) + crypto_aead_reqsize(child),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) crypto_aead_alignmask(child) + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) scatterwalk_map_and_copy(iv + GCM_AES_IV_SIZE, req->src, 0, req->assoclen - 8, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) memcpy(iv, ctx->nonce, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) memcpy(iv + 4, req->iv, 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) sg_init_table(rctx->src, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) sg_set_buf(rctx->src, iv + GCM_AES_IV_SIZE, req->assoclen - 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) sg = scatterwalk_ffwd(rctx->src + 1, req->src, req->assoclen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) if (sg != rctx->src + 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) sg_chain(rctx->src, 2, sg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) if (req->src != req->dst) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) sg_init_table(rctx->dst, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) sg_set_buf(rctx->dst, iv + GCM_AES_IV_SIZE, req->assoclen - 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) sg = scatterwalk_ffwd(rctx->dst + 1, req->dst, req->assoclen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) if (sg != rctx->dst + 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) sg_chain(rctx->dst, 2, sg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) aead_request_set_tfm(subreq, child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) aead_request_set_callback(subreq, req->base.flags, req->base.complete,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) req->base.data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) aead_request_set_crypt(subreq, rctx->src,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) req->src == req->dst ? rctx->src : rctx->dst,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) req->cryptlen, iv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) aead_request_set_ad(subreq, req->assoclen - 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) return subreq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) static int crypto_rfc4106_encrypt(struct aead_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) err = crypto_ipsec_check_assoclen(req->assoclen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) req = crypto_rfc4106_crypt(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) return crypto_aead_encrypt(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) static int crypto_rfc4106_decrypt(struct aead_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) err = crypto_ipsec_check_assoclen(req->assoclen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) req = crypto_rfc4106_crypt(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) return crypto_aead_decrypt(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) static int crypto_rfc4106_init_tfm(struct crypto_aead *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) struct aead_instance *inst = aead_alg_instance(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) struct crypto_aead_spawn *spawn = aead_instance_ctx(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) struct crypto_rfc4106_ctx *ctx = crypto_aead_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) struct crypto_aead *aead;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) unsigned long align;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) aead = crypto_spawn_aead(spawn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) if (IS_ERR(aead))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) return PTR_ERR(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) ctx->child = aead;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) align = crypto_aead_alignmask(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) align &= ~(crypto_tfm_ctx_alignment() - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) crypto_aead_set_reqsize(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) tfm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) sizeof(struct crypto_rfc4106_req_ctx) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) ALIGN(crypto_aead_reqsize(aead), crypto_tfm_ctx_alignment()) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) align + 24);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) static void crypto_rfc4106_exit_tfm(struct crypto_aead *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) struct crypto_rfc4106_ctx *ctx = crypto_aead_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) crypto_free_aead(ctx->child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) static void crypto_rfc4106_free(struct aead_instance *inst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) crypto_drop_aead(aead_instance_ctx(inst));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) kfree(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) static int crypto_rfc4106_create(struct crypto_template *tmpl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) struct rtattr **tb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) u32 mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) struct aead_instance *inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) struct crypto_aead_spawn *spawn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) struct aead_alg *alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_AEAD, &mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) if (!inst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) spawn = aead_instance_ctx(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) err = crypto_grab_aead(spawn, aead_crypto_instance(inst),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) crypto_attr_alg_name(tb[1]), 0, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) alg = crypto_spawn_aead_alg(spawn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) /* Underlying IV size must be 12. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) if (crypto_aead_alg_ivsize(alg) != GCM_AES_IV_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) /* Not a stream cipher? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) if (alg->base.cra_blocksize != 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) err = -ENAMETOOLONG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) "rfc4106(%s)", alg->base.cra_name) >=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) CRYPTO_MAX_ALG_NAME ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) "rfc4106(%s)", alg->base.cra_driver_name) >=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) CRYPTO_MAX_ALG_NAME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) inst->alg.base.cra_priority = alg->base.cra_priority;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) inst->alg.base.cra_blocksize = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) inst->alg.base.cra_alignmask = alg->base.cra_alignmask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) inst->alg.base.cra_ctxsize = sizeof(struct crypto_rfc4106_ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) inst->alg.ivsize = GCM_RFC4106_IV_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) inst->alg.chunksize = crypto_aead_alg_chunksize(alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) inst->alg.init = crypto_rfc4106_init_tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) inst->alg.exit = crypto_rfc4106_exit_tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) inst->alg.setkey = crypto_rfc4106_setkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) inst->alg.setauthsize = crypto_rfc4106_setauthsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) inst->alg.encrypt = crypto_rfc4106_encrypt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) inst->alg.decrypt = crypto_rfc4106_decrypt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) inst->free = crypto_rfc4106_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) err = aead_register_instance(tmpl, inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) err_free_inst:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) crypto_rfc4106_free(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) static int crypto_rfc4543_setkey(struct crypto_aead *parent, const u8 *key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) unsigned int keylen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) struct crypto_rfc4543_ctx *ctx = crypto_aead_ctx(parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) struct crypto_aead *child = ctx->child;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) if (keylen < 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) keylen -= 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) memcpy(ctx->nonce, key + keylen, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) crypto_aead_clear_flags(child, CRYPTO_TFM_REQ_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) crypto_aead_set_flags(child, crypto_aead_get_flags(parent) &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) CRYPTO_TFM_REQ_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) return crypto_aead_setkey(child, key, keylen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) static int crypto_rfc4543_setauthsize(struct crypto_aead *parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) unsigned int authsize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) struct crypto_rfc4543_ctx *ctx = crypto_aead_ctx(parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) if (authsize != 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) return crypto_aead_setauthsize(ctx->child, authsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) static int crypto_rfc4543_crypt(struct aead_request *req, bool enc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) struct crypto_aead *aead = crypto_aead_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) struct crypto_rfc4543_ctx *ctx = crypto_aead_ctx(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) struct crypto_rfc4543_req_ctx *rctx = aead_request_ctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) struct aead_request *subreq = &rctx->subreq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) unsigned int authsize = crypto_aead_authsize(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) u8 *iv = PTR_ALIGN((u8 *)(rctx + 1) + crypto_aead_reqsize(ctx->child),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) crypto_aead_alignmask(ctx->child) + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) if (req->src != req->dst) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) err = crypto_rfc4543_copy_src_to_dst(req, enc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) memcpy(iv, ctx->nonce, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) memcpy(iv + 4, req->iv, 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) aead_request_set_tfm(subreq, ctx->child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) aead_request_set_callback(subreq, req->base.flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) req->base.complete, req->base.data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) aead_request_set_crypt(subreq, req->src, req->dst,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) enc ? 0 : authsize, iv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) aead_request_set_ad(subreq, req->assoclen + req->cryptlen -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) subreq->cryptlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) return enc ? crypto_aead_encrypt(subreq) : crypto_aead_decrypt(subreq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) static int crypto_rfc4543_copy_src_to_dst(struct aead_request *req, bool enc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) struct crypto_aead *aead = crypto_aead_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) struct crypto_rfc4543_ctx *ctx = crypto_aead_ctx(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) unsigned int authsize = crypto_aead_authsize(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) unsigned int nbytes = req->assoclen + req->cryptlen -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) (enc ? 0 : authsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) SYNC_SKCIPHER_REQUEST_ON_STACK(nreq, ctx->null);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) skcipher_request_set_sync_tfm(nreq, ctx->null);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) skcipher_request_set_callback(nreq, req->base.flags, NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) skcipher_request_set_crypt(nreq, req->src, req->dst, nbytes, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) return crypto_skcipher_encrypt(nreq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) static int crypto_rfc4543_encrypt(struct aead_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) return crypto_ipsec_check_assoclen(req->assoclen) ?:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) crypto_rfc4543_crypt(req, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) static int crypto_rfc4543_decrypt(struct aead_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) return crypto_ipsec_check_assoclen(req->assoclen) ?:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) crypto_rfc4543_crypt(req, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) static int crypto_rfc4543_init_tfm(struct crypto_aead *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) struct aead_instance *inst = aead_alg_instance(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) struct crypto_rfc4543_instance_ctx *ictx = aead_instance_ctx(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) struct crypto_aead_spawn *spawn = &ictx->aead;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) struct crypto_rfc4543_ctx *ctx = crypto_aead_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) struct crypto_aead *aead;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) struct crypto_sync_skcipher *null;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) unsigned long align;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) aead = crypto_spawn_aead(spawn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) if (IS_ERR(aead))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) return PTR_ERR(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) null = crypto_get_default_null_skcipher();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) err = PTR_ERR(null);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) if (IS_ERR(null))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) goto err_free_aead;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) ctx->child = aead;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) ctx->null = null;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) align = crypto_aead_alignmask(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) align &= ~(crypto_tfm_ctx_alignment() - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) crypto_aead_set_reqsize(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) tfm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) sizeof(struct crypto_rfc4543_req_ctx) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) ALIGN(crypto_aead_reqsize(aead), crypto_tfm_ctx_alignment()) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) align + GCM_AES_IV_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) err_free_aead:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) crypto_free_aead(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) static void crypto_rfc4543_exit_tfm(struct crypto_aead *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) struct crypto_rfc4543_ctx *ctx = crypto_aead_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) crypto_free_aead(ctx->child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) crypto_put_default_null_skcipher();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) static void crypto_rfc4543_free(struct aead_instance *inst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) struct crypto_rfc4543_instance_ctx *ctx = aead_instance_ctx(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) crypto_drop_aead(&ctx->aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) kfree(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) static int crypto_rfc4543_create(struct crypto_template *tmpl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) struct rtattr **tb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) u32 mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) struct aead_instance *inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) struct aead_alg *alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) struct crypto_rfc4543_instance_ctx *ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_AEAD, &mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) if (!inst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) ctx = aead_instance_ctx(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) err = crypto_grab_aead(&ctx->aead, aead_crypto_instance(inst),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) crypto_attr_alg_name(tb[1]), 0, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) alg = crypto_spawn_aead_alg(&ctx->aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) /* Underlying IV size must be 12. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) if (crypto_aead_alg_ivsize(alg) != GCM_AES_IV_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) /* Not a stream cipher? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) if (alg->base.cra_blocksize != 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) err = -ENAMETOOLONG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) "rfc4543(%s)", alg->base.cra_name) >=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) CRYPTO_MAX_ALG_NAME ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) "rfc4543(%s)", alg->base.cra_driver_name) >=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) CRYPTO_MAX_ALG_NAME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) inst->alg.base.cra_priority = alg->base.cra_priority;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) inst->alg.base.cra_blocksize = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) inst->alg.base.cra_alignmask = alg->base.cra_alignmask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) inst->alg.base.cra_ctxsize = sizeof(struct crypto_rfc4543_ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) inst->alg.ivsize = GCM_RFC4543_IV_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) inst->alg.chunksize = crypto_aead_alg_chunksize(alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) inst->alg.init = crypto_rfc4543_init_tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) inst->alg.exit = crypto_rfc4543_exit_tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) inst->alg.setkey = crypto_rfc4543_setkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) inst->alg.setauthsize = crypto_rfc4543_setauthsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) inst->alg.encrypt = crypto_rfc4543_encrypt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) inst->alg.decrypt = crypto_rfc4543_decrypt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) inst->free = crypto_rfc4543_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) err = aead_register_instance(tmpl, inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) err_free_inst:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) crypto_rfc4543_free(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) static struct crypto_template crypto_gcm_tmpls[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) .name = "gcm_base",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) .create = crypto_gcm_base_create,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) .module = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) .name = "gcm",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) .create = crypto_gcm_create,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) .module = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) .name = "rfc4106",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) .create = crypto_rfc4106_create,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) .module = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) .name = "rfc4543",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) .create = crypto_rfc4543_create,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) .module = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) static int __init crypto_gcm_module_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) gcm_zeroes = kzalloc(sizeof(*gcm_zeroes), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) if (!gcm_zeroes)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) sg_init_one(&gcm_zeroes->sg, gcm_zeroes->buf, sizeof(gcm_zeroes->buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) err = crypto_register_templates(crypto_gcm_tmpls,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) ARRAY_SIZE(crypto_gcm_tmpls));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) kfree(gcm_zeroes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) static void __exit crypto_gcm_module_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) kfree(gcm_zeroes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) crypto_unregister_templates(crypto_gcm_tmpls,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) ARRAY_SIZE(crypto_gcm_tmpls));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) subsys_initcall(crypto_gcm_module_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) module_exit(crypto_gcm_module_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) MODULE_DESCRIPTION("Galois/Counter Mode");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) MODULE_AUTHOR("Mikko Herranen <mh1@iki.fi>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) MODULE_ALIAS_CRYPTO("gcm_base");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) MODULE_ALIAS_CRYPTO("rfc4106");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) MODULE_ALIAS_CRYPTO("rfc4543");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) MODULE_ALIAS_CRYPTO("gcm");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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