^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * CCM: Counter with CBC-MAC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * (C) Copyright IBM Corp. 2007 - Joy Latten <latten@us.ibm.com>
^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/internal/aead.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <crypto/internal/cipher.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <crypto/internal/hash.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <crypto/internal/skcipher.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <crypto/scatterwalk.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) struct ccm_instance_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) struct crypto_skcipher_spawn ctr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) struct crypto_ahash_spawn mac;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) struct crypto_ccm_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct crypto_ahash *mac;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) struct crypto_skcipher *ctr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) struct crypto_rfc4309_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) struct crypto_aead *child;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) u8 nonce[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) struct crypto_rfc4309_req_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) struct scatterlist src[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct scatterlist dst[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) struct aead_request subreq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) struct crypto_ccm_req_priv_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) u8 odata[16];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) u8 idata[16];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) u8 auth_tag[16];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) u32 flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) struct scatterlist src[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) struct scatterlist dst[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) union {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) struct ahash_request ahreq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) struct skcipher_request skreq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) };
^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 cbcmac_tfm_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) struct crypto_cipher *child;
^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 cbcmac_desc_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) unsigned int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) static inline struct crypto_ccm_req_priv_ctx *crypto_ccm_reqctx(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) struct aead_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) unsigned long align = crypto_aead_alignmask(crypto_aead_reqtfm(req));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) return (void *)PTR_ALIGN((u8 *)aead_request_ctx(req), align + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) static int set_msg_len(u8 *block, unsigned int msglen, int csize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) __be32 data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) memset(block, 0, csize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) block += csize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) if (csize >= 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) csize = 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) else if (msglen > (1 << (8 * csize)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) return -EOVERFLOW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) data = cpu_to_be32(msglen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) memcpy(block - csize, (u8 *)&data + 4 - csize, csize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) static int crypto_ccm_setkey(struct crypto_aead *aead, const u8 *key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) unsigned int keylen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) struct crypto_ccm_ctx *ctx = crypto_aead_ctx(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) struct crypto_skcipher *ctr = ctx->ctr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) struct crypto_ahash *mac = ctx->mac;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) crypto_skcipher_clear_flags(ctr, CRYPTO_TFM_REQ_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) crypto_skcipher_set_flags(ctr, crypto_aead_get_flags(aead) &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) CRYPTO_TFM_REQ_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) err = crypto_skcipher_setkey(ctr, key, keylen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) crypto_ahash_clear_flags(mac, CRYPTO_TFM_REQ_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) crypto_ahash_set_flags(mac, crypto_aead_get_flags(aead) &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) CRYPTO_TFM_REQ_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) return crypto_ahash_setkey(mac, key, keylen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) static int crypto_ccm_setauthsize(struct crypto_aead *tfm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) unsigned int authsize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) switch (authsize) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) case 4:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) case 6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) case 8:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) case 10:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) case 12:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) case 14:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) case 16:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) static int format_input(u8 *info, struct aead_request *req,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) unsigned int cryptlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) struct crypto_aead *aead = crypto_aead_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) unsigned int lp = req->iv[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) unsigned int l = lp + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) unsigned int m;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) m = crypto_aead_authsize(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) memcpy(info, req->iv, 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) /* format control info per RFC 3610 and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) * NIST Special Publication 800-38C
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) *info |= (8 * ((m - 2) / 2));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) if (req->assoclen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) *info |= 64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) return set_msg_len(info + 16 - l, cryptlen, l);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) static int format_adata(u8 *adata, unsigned int a)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) int len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) /* add control info for associated data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) * RFC 3610 and NIST Special Publication 800-38C
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) if (a < 65280) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) *(__be16 *)adata = cpu_to_be16(a);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) len = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) *(__be16 *)adata = cpu_to_be16(0xfffe);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) *(__be32 *)&adata[2] = cpu_to_be32(a);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) len = 6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) static int crypto_ccm_auth(struct aead_request *req, struct scatterlist *plain,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) unsigned int cryptlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) struct crypto_aead *aead = crypto_aead_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) struct crypto_ccm_ctx *ctx = crypto_aead_ctx(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) struct ahash_request *ahreq = &pctx->ahreq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) unsigned int assoclen = req->assoclen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) struct scatterlist sg[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) u8 *odata = pctx->odata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) u8 *idata = pctx->idata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) int ilen, err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) /* format control data for input */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) err = format_input(odata, req, cryptlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) sg_init_table(sg, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) sg_set_buf(&sg[0], odata, 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) /* format associated data and compute into mac */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) if (assoclen) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) ilen = format_adata(idata, assoclen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) sg_set_buf(&sg[1], idata, ilen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) sg_chain(sg, 3, req->src);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) ilen = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) sg_chain(sg, 2, req->src);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) ahash_request_set_tfm(ahreq, ctx->mac);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) ahash_request_set_callback(ahreq, pctx->flags, NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) ahash_request_set_crypt(ahreq, sg, NULL, assoclen + ilen + 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) err = crypto_ahash_init(ahreq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) err = crypto_ahash_update(ahreq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) /* we need to pad the MAC input to a round multiple of the block size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) ilen = 16 - (assoclen + ilen) % 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) if (ilen < 16) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) memset(idata, 0, ilen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) sg_init_table(sg, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) sg_set_buf(&sg[0], idata, ilen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) if (plain)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) sg_chain(sg, 2, plain);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) plain = sg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) cryptlen += ilen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) ahash_request_set_crypt(ahreq, plain, pctx->odata, cryptlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) err = crypto_ahash_finup(ahreq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) static void crypto_ccm_encrypt_done(struct crypto_async_request *areq, int err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) struct aead_request *req = areq->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) struct crypto_aead *aead = crypto_aead_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) u8 *odata = pctx->odata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) scatterwalk_map_and_copy(odata, req->dst,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) req->assoclen + req->cryptlen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) crypto_aead_authsize(aead), 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) aead_request_complete(req, err);
^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 inline int crypto_ccm_check_iv(const u8 *iv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) /* 2 <= L <= 8, so 1 <= L' <= 7. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) if (1 > iv[0] || iv[0] > 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) static int crypto_ccm_init_crypt(struct aead_request *req, u8 *tag)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) struct scatterlist *sg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) u8 *iv = req->iv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) err = crypto_ccm_check_iv(iv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) pctx->flags = aead_request_flags(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) /* Note: rfc 3610 and NIST 800-38C require counter of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) * zero to encrypt auth tag.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) memset(iv + 15 - iv[0], 0, iv[0] + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) sg_init_table(pctx->src, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) sg_set_buf(pctx->src, tag, 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) sg = scatterwalk_ffwd(pctx->src + 1, req->src, req->assoclen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) if (sg != pctx->src + 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) sg_chain(pctx->src, 2, sg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) if (req->src != req->dst) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) sg_init_table(pctx->dst, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) sg_set_buf(pctx->dst, tag, 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) sg = scatterwalk_ffwd(pctx->dst + 1, req->dst, req->assoclen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) if (sg != pctx->dst + 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) sg_chain(pctx->dst, 2, sg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) static int crypto_ccm_encrypt(struct aead_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) struct crypto_aead *aead = crypto_aead_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) struct crypto_ccm_ctx *ctx = crypto_aead_ctx(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) struct skcipher_request *skreq = &pctx->skreq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) struct scatterlist *dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) unsigned int cryptlen = req->cryptlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) u8 *odata = pctx->odata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) u8 *iv = req->iv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) err = crypto_ccm_init_crypt(req, odata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) err = crypto_ccm_auth(req, sg_next(pctx->src), cryptlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) dst = pctx->src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) if (req->src != req->dst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) dst = pctx->dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) skcipher_request_set_tfm(skreq, ctx->ctr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) skcipher_request_set_callback(skreq, pctx->flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) crypto_ccm_encrypt_done, req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) skcipher_request_set_crypt(skreq, pctx->src, dst, cryptlen + 16, iv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) err = crypto_skcipher_encrypt(skreq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) /* copy authtag to end of dst */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) scatterwalk_map_and_copy(odata, sg_next(dst), cryptlen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) crypto_aead_authsize(aead), 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) static void crypto_ccm_decrypt_done(struct crypto_async_request *areq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) int err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) struct aead_request *req = areq->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) struct crypto_aead *aead = crypto_aead_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) unsigned int authsize = crypto_aead_authsize(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) unsigned int cryptlen = req->cryptlen - authsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) struct scatterlist *dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) pctx->flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) dst = sg_next(req->src == req->dst ? pctx->src : pctx->dst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) if (!err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) err = crypto_ccm_auth(req, dst, cryptlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) if (!err && crypto_memneq(pctx->auth_tag, pctx->odata, authsize))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) err = -EBADMSG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) }
^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 crypto_ccm_decrypt(struct aead_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) struct crypto_aead *aead = crypto_aead_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) struct crypto_ccm_ctx *ctx = crypto_aead_ctx(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) struct skcipher_request *skreq = &pctx->skreq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) struct scatterlist *dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) unsigned int authsize = crypto_aead_authsize(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) unsigned int cryptlen = req->cryptlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) u8 *authtag = pctx->auth_tag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) u8 *odata = pctx->odata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) u8 *iv = pctx->idata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) cryptlen -= authsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) err = crypto_ccm_init_crypt(req, authtag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) scatterwalk_map_and_copy(authtag, sg_next(pctx->src), cryptlen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) authsize, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) dst = pctx->src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) if (req->src != req->dst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) dst = pctx->dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) memcpy(iv, req->iv, 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) skcipher_request_set_tfm(skreq, ctx->ctr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) skcipher_request_set_callback(skreq, pctx->flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) crypto_ccm_decrypt_done, req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) skcipher_request_set_crypt(skreq, pctx->src, dst, cryptlen + 16, iv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) err = crypto_skcipher_decrypt(skreq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) err = crypto_ccm_auth(req, sg_next(dst), cryptlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) /* verify */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) if (crypto_memneq(authtag, odata, authsize))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) return -EBADMSG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) static int crypto_ccm_init_tfm(struct crypto_aead *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) struct aead_instance *inst = aead_alg_instance(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) struct ccm_instance_ctx *ictx = aead_instance_ctx(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) struct crypto_ccm_ctx *ctx = crypto_aead_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) struct crypto_ahash *mac;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) struct crypto_skcipher *ctr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) unsigned long align;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) mac = crypto_spawn_ahash(&ictx->mac);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) if (IS_ERR(mac))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) return PTR_ERR(mac);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) ctr = crypto_spawn_skcipher(&ictx->ctr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) err = PTR_ERR(ctr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) if (IS_ERR(ctr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) goto err_free_mac;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) ctx->mac = mac;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) ctx->ctr = ctr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) align = crypto_aead_alignmask(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) align &= ~(crypto_tfm_ctx_alignment() - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) crypto_aead_set_reqsize(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) tfm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) align + sizeof(struct crypto_ccm_req_priv_ctx) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) max(crypto_ahash_reqsize(mac), crypto_skcipher_reqsize(ctr)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) err_free_mac:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) crypto_free_ahash(mac);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) static void crypto_ccm_exit_tfm(struct crypto_aead *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) struct crypto_ccm_ctx *ctx = crypto_aead_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) crypto_free_ahash(ctx->mac);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) crypto_free_skcipher(ctx->ctr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) static void crypto_ccm_free(struct aead_instance *inst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) struct ccm_instance_ctx *ctx = aead_instance_ctx(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) crypto_drop_ahash(&ctx->mac);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) crypto_drop_skcipher(&ctx->ctr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) kfree(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) static int crypto_ccm_create_common(struct crypto_template *tmpl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) struct rtattr **tb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) const char *ctr_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) const char *mac_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) u32 mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) struct aead_instance *inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) struct ccm_instance_ctx *ictx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) struct skcipher_alg *ctr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) struct hash_alg_common *mac;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_AEAD, &mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) inst = kzalloc(sizeof(*inst) + sizeof(*ictx), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) if (!inst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) ictx = aead_instance_ctx(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) err = crypto_grab_ahash(&ictx->mac, aead_crypto_instance(inst),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) mac_name, 0, mask | CRYPTO_ALG_ASYNC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) mac = crypto_spawn_ahash_alg(&ictx->mac);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) if (strncmp(mac->base.cra_name, "cbcmac(", 7) != 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) mac->digestsize != 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) err = crypto_grab_skcipher(&ictx->ctr, aead_crypto_instance(inst),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) ctr_name, 0, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) ctr = crypto_spawn_skcipher_alg(&ictx->ctr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) /* The skcipher algorithm must be CTR mode, using 16-byte blocks. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) if (strncmp(ctr->base.cra_name, "ctr(", 4) != 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) crypto_skcipher_alg_ivsize(ctr) != 16 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) ctr->base.cra_blocksize != 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) /* ctr and cbcmac must use the same underlying block cipher. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) if (strcmp(ctr->base.cra_name + 4, mac->base.cra_name + 7) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) err = -ENAMETOOLONG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) "ccm(%s", ctr->base.cra_name + 4) >= CRYPTO_MAX_ALG_NAME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) if (snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) "ccm_base(%s,%s)", ctr->base.cra_driver_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) mac->base.cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) inst->alg.base.cra_priority = (mac->base.cra_priority +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) ctr->base.cra_priority) / 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) inst->alg.base.cra_blocksize = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) inst->alg.base.cra_alignmask = mac->base.cra_alignmask |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) ctr->base.cra_alignmask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) inst->alg.ivsize = 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) inst->alg.chunksize = crypto_skcipher_alg_chunksize(ctr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) inst->alg.maxauthsize = 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) inst->alg.base.cra_ctxsize = sizeof(struct crypto_ccm_ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) inst->alg.init = crypto_ccm_init_tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) inst->alg.exit = crypto_ccm_exit_tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) inst->alg.setkey = crypto_ccm_setkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) inst->alg.setauthsize = crypto_ccm_setauthsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) inst->alg.encrypt = crypto_ccm_encrypt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) inst->alg.decrypt = crypto_ccm_decrypt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) inst->free = crypto_ccm_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) err = aead_register_instance(tmpl, inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) err_free_inst:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) crypto_ccm_free(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) static int crypto_ccm_create(struct crypto_template *tmpl, struct rtattr **tb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) const char *cipher_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) char ctr_name[CRYPTO_MAX_ALG_NAME];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) char mac_name[CRYPTO_MAX_ALG_NAME];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) cipher_name = crypto_attr_alg_name(tb[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) if (IS_ERR(cipher_name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) return PTR_ERR(cipher_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) if (snprintf(ctr_name, CRYPTO_MAX_ALG_NAME, "ctr(%s)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) cipher_name) >= CRYPTO_MAX_ALG_NAME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) return -ENAMETOOLONG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) if (snprintf(mac_name, CRYPTO_MAX_ALG_NAME, "cbcmac(%s)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) cipher_name) >= CRYPTO_MAX_ALG_NAME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) return -ENAMETOOLONG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) return crypto_ccm_create_common(tmpl, tb, ctr_name, mac_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) static int crypto_ccm_base_create(struct crypto_template *tmpl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) struct rtattr **tb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) const char *ctr_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) const char *mac_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) ctr_name = crypto_attr_alg_name(tb[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) if (IS_ERR(ctr_name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) return PTR_ERR(ctr_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) mac_name = crypto_attr_alg_name(tb[2]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) if (IS_ERR(mac_name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) return PTR_ERR(mac_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) return crypto_ccm_create_common(tmpl, tb, ctr_name, mac_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) static int crypto_rfc4309_setkey(struct crypto_aead *parent, const u8 *key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) unsigned int keylen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) struct crypto_rfc4309_ctx *ctx = crypto_aead_ctx(parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) struct crypto_aead *child = ctx->child;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) if (keylen < 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) keylen -= 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) memcpy(ctx->nonce, key + keylen, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) crypto_aead_clear_flags(child, CRYPTO_TFM_REQ_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) crypto_aead_set_flags(child, crypto_aead_get_flags(parent) &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) CRYPTO_TFM_REQ_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) return crypto_aead_setkey(child, key, keylen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) static int crypto_rfc4309_setauthsize(struct crypto_aead *parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) unsigned int authsize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) struct crypto_rfc4309_ctx *ctx = crypto_aead_ctx(parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) switch (authsize) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) case 8:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) case 12:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) case 16:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) return crypto_aead_setauthsize(ctx->child, authsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) static struct aead_request *crypto_rfc4309_crypt(struct aead_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) struct crypto_rfc4309_req_ctx *rctx = aead_request_ctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) struct aead_request *subreq = &rctx->subreq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) struct crypto_aead *aead = crypto_aead_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) struct crypto_rfc4309_ctx *ctx = crypto_aead_ctx(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) struct crypto_aead *child = ctx->child;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) struct scatterlist *sg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) u8 *iv = PTR_ALIGN((u8 *)(subreq + 1) + crypto_aead_reqsize(child),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) crypto_aead_alignmask(child) + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) /* L' */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) iv[0] = 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) memcpy(iv + 1, ctx->nonce, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) memcpy(iv + 4, req->iv, 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) scatterwalk_map_and_copy(iv + 16, req->src, 0, req->assoclen - 8, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) sg_init_table(rctx->src, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) sg_set_buf(rctx->src, iv + 16, req->assoclen - 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) sg = scatterwalk_ffwd(rctx->src + 1, req->src, req->assoclen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) if (sg != rctx->src + 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) sg_chain(rctx->src, 2, sg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) if (req->src != req->dst) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) sg_init_table(rctx->dst, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) sg_set_buf(rctx->dst, iv + 16, req->assoclen - 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) sg = scatterwalk_ffwd(rctx->dst + 1, req->dst, req->assoclen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) if (sg != rctx->dst + 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) sg_chain(rctx->dst, 2, sg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) aead_request_set_tfm(subreq, child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) aead_request_set_callback(subreq, req->base.flags, req->base.complete,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) req->base.data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) aead_request_set_crypt(subreq, rctx->src,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) req->src == req->dst ? rctx->src : rctx->dst,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) req->cryptlen, iv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) aead_request_set_ad(subreq, req->assoclen - 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) return subreq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) static int crypto_rfc4309_encrypt(struct aead_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) if (req->assoclen != 16 && req->assoclen != 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) req = crypto_rfc4309_crypt(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) return crypto_aead_encrypt(req);
^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_rfc4309_decrypt(struct aead_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) if (req->assoclen != 16 && req->assoclen != 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) req = crypto_rfc4309_crypt(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) return crypto_aead_decrypt(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) static int crypto_rfc4309_init_tfm(struct crypto_aead *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) struct aead_instance *inst = aead_alg_instance(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) struct crypto_aead_spawn *spawn = aead_instance_ctx(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) struct crypto_rfc4309_ctx *ctx = crypto_aead_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) struct crypto_aead *aead;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) unsigned long align;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) aead = crypto_spawn_aead(spawn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) if (IS_ERR(aead))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) return PTR_ERR(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) ctx->child = aead;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) align = crypto_aead_alignmask(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) align &= ~(crypto_tfm_ctx_alignment() - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) crypto_aead_set_reqsize(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) tfm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) sizeof(struct crypto_rfc4309_req_ctx) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) ALIGN(crypto_aead_reqsize(aead), crypto_tfm_ctx_alignment()) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) align + 32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) static void crypto_rfc4309_exit_tfm(struct crypto_aead *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) struct crypto_rfc4309_ctx *ctx = crypto_aead_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) crypto_free_aead(ctx->child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) static void crypto_rfc4309_free(struct aead_instance *inst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) crypto_drop_aead(aead_instance_ctx(inst));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) kfree(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) static int crypto_rfc4309_create(struct crypto_template *tmpl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) struct rtattr **tb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) u32 mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) struct aead_instance *inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) struct crypto_aead_spawn *spawn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) struct aead_alg *alg;
^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_check_attr_type(tb, CRYPTO_ALG_TYPE_AEAD, &mask);
^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) inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) if (!inst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) spawn = aead_instance_ctx(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) err = crypto_grab_aead(spawn, aead_crypto_instance(inst),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) crypto_attr_alg_name(tb[1]), 0, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) alg = crypto_spawn_aead_alg(spawn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) /* We only support 16-byte blocks. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) if (crypto_aead_alg_ivsize(alg) != 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) /* Not a stream cipher? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) if (alg->base.cra_blocksize != 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) err = -ENAMETOOLONG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) "rfc4309(%s)", alg->base.cra_name) >=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) CRYPTO_MAX_ALG_NAME ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) "rfc4309(%s)", alg->base.cra_driver_name) >=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) CRYPTO_MAX_ALG_NAME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) inst->alg.base.cra_priority = alg->base.cra_priority;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) inst->alg.base.cra_blocksize = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) inst->alg.base.cra_alignmask = alg->base.cra_alignmask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) inst->alg.ivsize = 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) inst->alg.chunksize = crypto_aead_alg_chunksize(alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) inst->alg.maxauthsize = 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) inst->alg.base.cra_ctxsize = sizeof(struct crypto_rfc4309_ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) inst->alg.init = crypto_rfc4309_init_tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) inst->alg.exit = crypto_rfc4309_exit_tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) inst->alg.setkey = crypto_rfc4309_setkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) inst->alg.setauthsize = crypto_rfc4309_setauthsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) inst->alg.encrypt = crypto_rfc4309_encrypt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) inst->alg.decrypt = crypto_rfc4309_decrypt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) inst->free = crypto_rfc4309_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) err = aead_register_instance(tmpl, inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) err_free_inst:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) crypto_rfc4309_free(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) static int crypto_cbcmac_digest_setkey(struct crypto_shash *parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) const u8 *inkey, unsigned int keylen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) struct cbcmac_tfm_ctx *ctx = crypto_shash_ctx(parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) return crypto_cipher_setkey(ctx->child, inkey, keylen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) static int crypto_cbcmac_digest_init(struct shash_desc *pdesc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) struct cbcmac_desc_ctx *ctx = shash_desc_ctx(pdesc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) int bs = crypto_shash_digestsize(pdesc->tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) u8 *dg = (u8 *)ctx + crypto_shash_descsize(pdesc->tfm) - bs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) ctx->len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) memset(dg, 0, bs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) static int crypto_cbcmac_digest_update(struct shash_desc *pdesc, const u8 *p,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) unsigned int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) struct crypto_shash *parent = pdesc->tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) struct cbcmac_tfm_ctx *tctx = crypto_shash_ctx(parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) struct cbcmac_desc_ctx *ctx = shash_desc_ctx(pdesc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) struct crypto_cipher *tfm = tctx->child;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) int bs = crypto_shash_digestsize(parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) u8 *dg = (u8 *)ctx + crypto_shash_descsize(parent) - bs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) while (len > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) unsigned int l = min(len, bs - ctx->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) crypto_xor(dg + ctx->len, p, l);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) ctx->len +=l;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) len -= l;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) p += l;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) if (ctx->len == bs) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) crypto_cipher_encrypt_one(tfm, dg, dg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) ctx->len = 0;
^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)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) static int crypto_cbcmac_digest_final(struct shash_desc *pdesc, u8 *out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) struct crypto_shash *parent = pdesc->tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) struct cbcmac_tfm_ctx *tctx = crypto_shash_ctx(parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) struct cbcmac_desc_ctx *ctx = shash_desc_ctx(pdesc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) struct crypto_cipher *tfm = tctx->child;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) int bs = crypto_shash_digestsize(parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) u8 *dg = (u8 *)ctx + crypto_shash_descsize(parent) - bs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) if (ctx->len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) crypto_cipher_encrypt_one(tfm, dg, dg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) memcpy(out, dg, bs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) static int cbcmac_init_tfm(struct crypto_tfm *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) struct crypto_cipher *cipher;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) struct crypto_instance *inst = (void *)tfm->__crt_alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) struct crypto_cipher_spawn *spawn = crypto_instance_ctx(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) struct cbcmac_tfm_ctx *ctx = crypto_tfm_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) cipher = crypto_spawn_cipher(spawn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) if (IS_ERR(cipher))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) return PTR_ERR(cipher);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) ctx->child = cipher;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) static void cbcmac_exit_tfm(struct crypto_tfm *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) struct cbcmac_tfm_ctx *ctx = crypto_tfm_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) crypto_free_cipher(ctx->child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) static int cbcmac_create(struct crypto_template *tmpl, struct rtattr **tb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) struct shash_instance *inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) struct crypto_cipher_spawn *spawn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) struct crypto_alg *alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) u32 mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_SHASH, &mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) if (!inst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) spawn = shash_instance_ctx(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) err = crypto_grab_cipher(spawn, shash_crypto_instance(inst),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) crypto_attr_alg_name(tb[1]), 0, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) alg = crypto_spawn_cipher_alg(spawn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) err = crypto_inst_setname(shash_crypto_instance(inst), tmpl->name, alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) inst->alg.base.cra_priority = alg->cra_priority;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) inst->alg.base.cra_blocksize = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) inst->alg.digestsize = alg->cra_blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) inst->alg.descsize = ALIGN(sizeof(struct cbcmac_desc_ctx),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) alg->cra_alignmask + 1) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) alg->cra_blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) inst->alg.base.cra_ctxsize = sizeof(struct cbcmac_tfm_ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) inst->alg.base.cra_init = cbcmac_init_tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) inst->alg.base.cra_exit = cbcmac_exit_tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) inst->alg.init = crypto_cbcmac_digest_init;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) inst->alg.update = crypto_cbcmac_digest_update;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) inst->alg.final = crypto_cbcmac_digest_final;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) inst->alg.setkey = crypto_cbcmac_digest_setkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) inst->free = shash_free_singlespawn_instance;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) err = shash_register_instance(tmpl, inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) err_free_inst:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) shash_free_singlespawn_instance(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) return err;
^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 struct crypto_template crypto_ccm_tmpls[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) .name = "cbcmac",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) .create = cbcmac_create,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) .module = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) .name = "ccm_base",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) .create = crypto_ccm_base_create,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) .module = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) .name = "ccm",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) .create = crypto_ccm_create,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) .module = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) .name = "rfc4309",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) .create = crypto_rfc4309_create,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) .module = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) static int __init crypto_ccm_module_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) return crypto_register_templates(crypto_ccm_tmpls,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) ARRAY_SIZE(crypto_ccm_tmpls));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) static void __exit crypto_ccm_module_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) crypto_unregister_templates(crypto_ccm_tmpls,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) ARRAY_SIZE(crypto_ccm_tmpls));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) subsys_initcall(crypto_ccm_module_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) module_exit(crypto_ccm_module_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) MODULE_DESCRIPTION("Counter with CBC MAC");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) MODULE_ALIAS_CRYPTO("ccm_base");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) MODULE_ALIAS_CRYPTO("rfc4309");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) MODULE_ALIAS_CRYPTO("ccm");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) MODULE_ALIAS_CRYPTO("cbcmac");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) MODULE_IMPORT_NS(CRYPTO_INTERNAL);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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