^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * ESSIV skcipher and aead template for block encryption
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * This template encapsulates the ESSIV IV generation algorithm used by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * dm-crypt and fscrypt, which converts the initial vector for the skcipher
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * used for block encryption, by encrypting it using the hash of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * skcipher key as encryption key. Usually, the input IV is a 64-bit sector
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * number in LE representation zero-padded to the size of the IV, but this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * is not assumed by this driver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * The typical use of this template is to instantiate the skcipher
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * 'essiv(cbc(aes),sha256)', which is the only instantiation used by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * fscrypt, and the most relevant one for dm-crypt. However, dm-crypt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * also permits ESSIV to be used in combination with the authenc template,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * e.g., 'essiv(authenc(hmac(sha256),cbc(aes)),sha256)', in which case
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * we need to instantiate an aead that accepts the same special key format
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * as the authenc template, and deals with the way the encrypted IV is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * embedded into the AAD area of the aead request. This means the AEAD
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * flavor produced by this template is tightly coupled to the way dm-crypt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * happens to use it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * Copyright (c) 2019 Linaro, Ltd. <ard.biesheuvel@linaro.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * Heavily based on:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * adiantum length-preserving encryption mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * Copyright 2018 Google LLC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <crypto/authenc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <crypto/internal/aead.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <crypto/internal/cipher.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include <crypto/internal/hash.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include <crypto/internal/skcipher.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include <crypto/scatterwalk.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #include "internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) struct essiv_instance_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) union {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) struct crypto_skcipher_spawn skcipher_spawn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) struct crypto_aead_spawn aead_spawn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) } u;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) char essiv_cipher_name[CRYPTO_MAX_ALG_NAME];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) char shash_driver_name[CRYPTO_MAX_ALG_NAME];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct essiv_tfm_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) union {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) struct crypto_skcipher *skcipher;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) struct crypto_aead *aead;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) } u;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) struct crypto_cipher *essiv_cipher;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) struct crypto_shash *hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) int ivoffset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) struct essiv_aead_request_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) struct scatterlist sg[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) u8 *assoc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) struct aead_request aead_req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) static int essiv_skcipher_setkey(struct crypto_skcipher *tfm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) const u8 *key, unsigned int keylen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) struct essiv_tfm_ctx *tctx = crypto_skcipher_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) u8 salt[HASH_MAX_DIGESTSIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) crypto_skcipher_clear_flags(tctx->u.skcipher, CRYPTO_TFM_REQ_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) crypto_skcipher_set_flags(tctx->u.skcipher,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) crypto_skcipher_get_flags(tfm) &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) CRYPTO_TFM_REQ_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) err = crypto_skcipher_setkey(tctx->u.skcipher, key, keylen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) err = crypto_shash_tfm_digest(tctx->hash, key, keylen, salt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) crypto_cipher_clear_flags(tctx->essiv_cipher, CRYPTO_TFM_REQ_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) crypto_cipher_set_flags(tctx->essiv_cipher,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) crypto_skcipher_get_flags(tfm) &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) CRYPTO_TFM_REQ_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return crypto_cipher_setkey(tctx->essiv_cipher, salt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) crypto_shash_digestsize(tctx->hash));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) static int essiv_aead_setkey(struct crypto_aead *tfm, const u8 *key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) unsigned int keylen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) struct essiv_tfm_ctx *tctx = crypto_aead_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) SHASH_DESC_ON_STACK(desc, tctx->hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) struct crypto_authenc_keys keys;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) u8 salt[HASH_MAX_DIGESTSIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) crypto_aead_clear_flags(tctx->u.aead, CRYPTO_TFM_REQ_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) crypto_aead_set_flags(tctx->u.aead, crypto_aead_get_flags(tfm) &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) CRYPTO_TFM_REQ_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) err = crypto_aead_setkey(tctx->u.aead, key, keylen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) if (crypto_authenc_extractkeys(&keys, key, keylen) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) desc->tfm = tctx->hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) err = crypto_shash_init(desc) ?:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) crypto_shash_update(desc, keys.enckey, keys.enckeylen) ?:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) crypto_shash_finup(desc, keys.authkey, keys.authkeylen, salt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) crypto_cipher_clear_flags(tctx->essiv_cipher, CRYPTO_TFM_REQ_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) crypto_cipher_set_flags(tctx->essiv_cipher, crypto_aead_get_flags(tfm) &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) CRYPTO_TFM_REQ_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) return crypto_cipher_setkey(tctx->essiv_cipher, salt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) crypto_shash_digestsize(tctx->hash));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) static int essiv_aead_setauthsize(struct crypto_aead *tfm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) unsigned int authsize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) struct essiv_tfm_ctx *tctx = crypto_aead_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) return crypto_aead_setauthsize(tctx->u.aead, authsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) static void essiv_skcipher_done(struct crypto_async_request *areq, int err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) struct skcipher_request *req = areq->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) skcipher_request_complete(req, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) static int essiv_skcipher_crypt(struct skcipher_request *req, bool enc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) const struct essiv_tfm_ctx *tctx = crypto_skcipher_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) struct skcipher_request *subreq = skcipher_request_ctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) crypto_cipher_encrypt_one(tctx->essiv_cipher, req->iv, req->iv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) skcipher_request_set_tfm(subreq, tctx->u.skcipher);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) req->iv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) skcipher_request_set_callback(subreq, skcipher_request_flags(req),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) essiv_skcipher_done, req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) return enc ? crypto_skcipher_encrypt(subreq) :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) crypto_skcipher_decrypt(subreq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) static int essiv_skcipher_encrypt(struct skcipher_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) return essiv_skcipher_crypt(req, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) static int essiv_skcipher_decrypt(struct skcipher_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) return essiv_skcipher_crypt(req, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) static void essiv_aead_done(struct crypto_async_request *areq, int err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) struct aead_request *req = areq->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) struct essiv_aead_request_ctx *rctx = aead_request_ctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) kfree(rctx->assoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) aead_request_complete(req, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) static int essiv_aead_crypt(struct aead_request *req, bool enc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) struct crypto_aead *tfm = crypto_aead_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) const struct essiv_tfm_ctx *tctx = crypto_aead_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) struct essiv_aead_request_ctx *rctx = aead_request_ctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) struct aead_request *subreq = &rctx->aead_req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) struct scatterlist *src = req->src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) crypto_cipher_encrypt_one(tctx->essiv_cipher, req->iv, req->iv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) * dm-crypt embeds the sector number and the IV in the AAD region, so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) * we have to copy the converted IV into the right scatterlist before
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) * we pass it on.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) rctx->assoc = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) if (req->src == req->dst || !enc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) scatterwalk_map_and_copy(req->iv, req->dst,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) req->assoclen - crypto_aead_ivsize(tfm),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) crypto_aead_ivsize(tfm), 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) u8 *iv = (u8 *)aead_request_ctx(req) + tctx->ivoffset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) int ivsize = crypto_aead_ivsize(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) int ssize = req->assoclen - ivsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) struct scatterlist *sg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) int nents;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) if (ssize < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) nents = sg_nents_for_len(req->src, ssize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) if (nents < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) memcpy(iv, req->iv, ivsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) sg_init_table(rctx->sg, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) if (unlikely(nents > 1)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) * This is a case that rarely occurs in practice, but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) * for correctness, we have to deal with it nonetheless.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) rctx->assoc = kmalloc(ssize, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) if (!rctx->assoc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) scatterwalk_map_and_copy(rctx->assoc, req->src, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) ssize, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) sg_set_buf(rctx->sg, rctx->assoc, ssize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) sg_set_page(rctx->sg, sg_page(req->src), ssize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) req->src->offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) sg_set_buf(rctx->sg + 1, iv, ivsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) sg = scatterwalk_ffwd(rctx->sg + 2, req->src, req->assoclen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) if (sg != rctx->sg + 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) sg_chain(rctx->sg, 3, sg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) src = rctx->sg;
^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) aead_request_set_tfm(subreq, tctx->u.aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) aead_request_set_ad(subreq, req->assoclen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) aead_request_set_callback(subreq, aead_request_flags(req),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) essiv_aead_done, req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) aead_request_set_crypt(subreq, src, req->dst, req->cryptlen, req->iv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) err = enc ? crypto_aead_encrypt(subreq) :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) crypto_aead_decrypt(subreq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) if (rctx->assoc && err != -EINPROGRESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) kfree(rctx->assoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) static int essiv_aead_encrypt(struct aead_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) return essiv_aead_crypt(req, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) static int essiv_aead_decrypt(struct aead_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) return essiv_aead_crypt(req, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) static int essiv_init_tfm(struct essiv_instance_ctx *ictx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) struct essiv_tfm_ctx *tctx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) struct crypto_cipher *essiv_cipher;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) struct crypto_shash *hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) essiv_cipher = crypto_alloc_cipher(ictx->essiv_cipher_name, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) if (IS_ERR(essiv_cipher))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) return PTR_ERR(essiv_cipher);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) hash = crypto_alloc_shash(ictx->shash_driver_name, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) if (IS_ERR(hash)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) err = PTR_ERR(hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) goto err_free_essiv_cipher;
^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) tctx->essiv_cipher = essiv_cipher;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) tctx->hash = hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) err_free_essiv_cipher:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) crypto_free_cipher(essiv_cipher);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) static int essiv_skcipher_init_tfm(struct crypto_skcipher *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) struct skcipher_instance *inst = skcipher_alg_instance(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) struct essiv_instance_ctx *ictx = skcipher_instance_ctx(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) struct essiv_tfm_ctx *tctx = crypto_skcipher_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) struct crypto_skcipher *skcipher;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) skcipher = crypto_spawn_skcipher(&ictx->u.skcipher_spawn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) if (IS_ERR(skcipher))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) return PTR_ERR(skcipher);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) crypto_skcipher_set_reqsize(tfm, sizeof(struct skcipher_request) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) crypto_skcipher_reqsize(skcipher));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) err = essiv_init_tfm(ictx, tctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) crypto_free_skcipher(skcipher);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) tctx->u.skcipher = skcipher;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) static int essiv_aead_init_tfm(struct crypto_aead *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) struct aead_instance *inst = aead_alg_instance(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) struct essiv_instance_ctx *ictx = aead_instance_ctx(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) struct essiv_tfm_ctx *tctx = crypto_aead_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) struct crypto_aead *aead;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) unsigned int subreq_size;
^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) BUILD_BUG_ON(offsetofend(struct essiv_aead_request_ctx, aead_req) !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) sizeof(struct essiv_aead_request_ctx));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) aead = crypto_spawn_aead(&ictx->u.aead_spawn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) if (IS_ERR(aead))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) return PTR_ERR(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) subreq_size = sizeof_field(struct essiv_aead_request_ctx, aead_req) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) crypto_aead_reqsize(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) tctx->ivoffset = offsetof(struct essiv_aead_request_ctx, aead_req) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) subreq_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) crypto_aead_set_reqsize(tfm, tctx->ivoffset + crypto_aead_ivsize(aead));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) err = essiv_init_tfm(ictx, tctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) crypto_free_aead(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) tctx->u.aead = aead;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) static void essiv_skcipher_exit_tfm(struct crypto_skcipher *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) struct essiv_tfm_ctx *tctx = crypto_skcipher_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) crypto_free_skcipher(tctx->u.skcipher);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) crypto_free_cipher(tctx->essiv_cipher);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) crypto_free_shash(tctx->hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) static void essiv_aead_exit_tfm(struct crypto_aead *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) struct essiv_tfm_ctx *tctx = crypto_aead_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) crypto_free_aead(tctx->u.aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) crypto_free_cipher(tctx->essiv_cipher);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) crypto_free_shash(tctx->hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) static void essiv_skcipher_free_instance(struct skcipher_instance *inst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) struct essiv_instance_ctx *ictx = skcipher_instance_ctx(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) crypto_drop_skcipher(&ictx->u.skcipher_spawn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) kfree(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) static void essiv_aead_free_instance(struct aead_instance *inst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) struct essiv_instance_ctx *ictx = aead_instance_ctx(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) crypto_drop_aead(&ictx->u.aead_spawn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) kfree(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) static bool parse_cipher_name(char *essiv_cipher_name, const char *cra_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) const char *p, *q;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) /* find the last opening parens */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) p = strrchr(cra_name, '(');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) if (!p++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) /* find the first closing parens in the tail of the string */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) q = strchr(p, ')');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) if (!q)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) len = q - p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) if (len >= CRYPTO_MAX_ALG_NAME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) memcpy(essiv_cipher_name, p, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) essiv_cipher_name[len] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) static bool essiv_supported_algorithms(const char *essiv_cipher_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) struct shash_alg *hash_alg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) int ivsize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) struct crypto_alg *alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) bool ret = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) alg = crypto_alg_mod_lookup(essiv_cipher_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) CRYPTO_ALG_TYPE_CIPHER,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) CRYPTO_ALG_TYPE_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) if (IS_ERR(alg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) if (hash_alg->digestsize < alg->cra_cipher.cia_min_keysize ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) hash_alg->digestsize > alg->cra_cipher.cia_max_keysize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) if (ivsize != alg->cra_blocksize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) if (crypto_shash_alg_needs_key(hash_alg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) ret = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) crypto_mod_put(alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) static int essiv_create(struct crypto_template *tmpl, struct rtattr **tb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) struct crypto_attr_type *algt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) const char *inner_cipher_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) const char *shash_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) struct skcipher_instance *skcipher_inst = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) struct aead_instance *aead_inst = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) struct crypto_instance *inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) struct crypto_alg *base, *block_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) struct essiv_instance_ctx *ictx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) struct skcipher_alg *skcipher_alg = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) struct aead_alg *aead_alg = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) struct crypto_alg *_hash_alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) struct shash_alg *hash_alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) int ivsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) u32 type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) u32 mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) algt = crypto_get_attr_type(tb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) if (IS_ERR(algt))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) return PTR_ERR(algt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) inner_cipher_name = crypto_attr_alg_name(tb[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) if (IS_ERR(inner_cipher_name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) return PTR_ERR(inner_cipher_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) shash_name = crypto_attr_alg_name(tb[2]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) if (IS_ERR(shash_name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) return PTR_ERR(shash_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) type = algt->type & algt->mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) mask = crypto_algt_inherited_mask(algt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) switch (type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) case CRYPTO_ALG_TYPE_SKCIPHER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) skcipher_inst = kzalloc(sizeof(*skcipher_inst) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) sizeof(*ictx), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) if (!skcipher_inst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) inst = skcipher_crypto_instance(skcipher_inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) base = &skcipher_inst->alg.base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) ictx = crypto_instance_ctx(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) /* Symmetric cipher, e.g., "cbc(aes)" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) err = crypto_grab_skcipher(&ictx->u.skcipher_spawn, inst,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) inner_cipher_name, 0, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) goto out_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) skcipher_alg = crypto_spawn_skcipher_alg(&ictx->u.skcipher_spawn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) block_base = &skcipher_alg->base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) ivsize = crypto_skcipher_alg_ivsize(skcipher_alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) case CRYPTO_ALG_TYPE_AEAD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) aead_inst = kzalloc(sizeof(*aead_inst) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) sizeof(*ictx), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) if (!aead_inst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) inst = aead_crypto_instance(aead_inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) base = &aead_inst->alg.base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) ictx = crypto_instance_ctx(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) /* AEAD cipher, e.g., "authenc(hmac(sha256),cbc(aes))" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) err = crypto_grab_aead(&ictx->u.aead_spawn, inst,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) inner_cipher_name, 0, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) goto out_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) aead_alg = crypto_spawn_aead_alg(&ictx->u.aead_spawn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) block_base = &aead_alg->base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) if (!strstarts(block_base->cra_name, "authenc(")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) pr_warn("Only authenc() type AEADs are supported by ESSIV\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) goto out_drop_skcipher;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) ivsize = aead_alg->ivsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) if (!parse_cipher_name(ictx->essiv_cipher_name, block_base->cra_name)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) pr_warn("Failed to parse ESSIV cipher name from skcipher cra_name\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) goto out_drop_skcipher;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) /* Synchronous hash, e.g., "sha256" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) _hash_alg = crypto_alg_mod_lookup(shash_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) CRYPTO_ALG_TYPE_SHASH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) CRYPTO_ALG_TYPE_MASK | mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) if (IS_ERR(_hash_alg)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) err = PTR_ERR(_hash_alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) goto out_drop_skcipher;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) hash_alg = __crypto_shash_alg(_hash_alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) /* Check the set of algorithms */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) if (!essiv_supported_algorithms(ictx->essiv_cipher_name, hash_alg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) ivsize)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) pr_warn("Unsupported essiv instantiation: essiv(%s,%s)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) block_base->cra_name, hash_alg->base.cra_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) goto out_free_hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) /* record the driver name so we can instantiate this exact algo later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) strlcpy(ictx->shash_driver_name, hash_alg->base.cra_driver_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) CRYPTO_MAX_ALG_NAME);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) /* Instance fields */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) err = -ENAMETOOLONG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) if (snprintf(base->cra_name, CRYPTO_MAX_ALG_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) "essiv(%s,%s)", block_base->cra_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) hash_alg->base.cra_name) >= CRYPTO_MAX_ALG_NAME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) goto out_free_hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) if (snprintf(base->cra_driver_name, CRYPTO_MAX_ALG_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) "essiv(%s,%s)", block_base->cra_driver_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) hash_alg->base.cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) goto out_free_hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) * hash_alg wasn't gotten via crypto_grab*(), so we need to inherit its
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) * flags manually.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) base->cra_flags |= (hash_alg->base.cra_flags &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) CRYPTO_ALG_INHERITED_FLAGS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) base->cra_blocksize = block_base->cra_blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) base->cra_ctxsize = sizeof(struct essiv_tfm_ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) base->cra_alignmask = block_base->cra_alignmask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) base->cra_priority = block_base->cra_priority;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) if (type == CRYPTO_ALG_TYPE_SKCIPHER) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) skcipher_inst->alg.setkey = essiv_skcipher_setkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) skcipher_inst->alg.encrypt = essiv_skcipher_encrypt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) skcipher_inst->alg.decrypt = essiv_skcipher_decrypt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) skcipher_inst->alg.init = essiv_skcipher_init_tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) skcipher_inst->alg.exit = essiv_skcipher_exit_tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) skcipher_inst->alg.min_keysize = crypto_skcipher_alg_min_keysize(skcipher_alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) skcipher_inst->alg.max_keysize = crypto_skcipher_alg_max_keysize(skcipher_alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) skcipher_inst->alg.ivsize = ivsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) skcipher_inst->alg.chunksize = crypto_skcipher_alg_chunksize(skcipher_alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) skcipher_inst->alg.walksize = crypto_skcipher_alg_walksize(skcipher_alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) skcipher_inst->free = essiv_skcipher_free_instance;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) err = skcipher_register_instance(tmpl, skcipher_inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) aead_inst->alg.setkey = essiv_aead_setkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) aead_inst->alg.setauthsize = essiv_aead_setauthsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) aead_inst->alg.encrypt = essiv_aead_encrypt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) aead_inst->alg.decrypt = essiv_aead_decrypt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) aead_inst->alg.init = essiv_aead_init_tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) aead_inst->alg.exit = essiv_aead_exit_tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) aead_inst->alg.ivsize = ivsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) aead_inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(aead_alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) aead_inst->alg.chunksize = crypto_aead_alg_chunksize(aead_alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) aead_inst->free = essiv_aead_free_instance;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) err = aead_register_instance(tmpl, aead_inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) goto out_free_hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) crypto_mod_put(_hash_alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) out_free_hash:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) crypto_mod_put(_hash_alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) out_drop_skcipher:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) if (type == CRYPTO_ALG_TYPE_SKCIPHER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) crypto_drop_skcipher(&ictx->u.skcipher_spawn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) crypto_drop_aead(&ictx->u.aead_spawn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) out_free_inst:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) kfree(skcipher_inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) kfree(aead_inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) /* essiv(cipher_name, shash_name) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) static struct crypto_template essiv_tmpl = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) .name = "essiv",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) .create = essiv_create,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) .module = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) static int __init essiv_module_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) return crypto_register_template(&essiv_tmpl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) static void __exit essiv_module_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) crypto_unregister_template(&essiv_tmpl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) subsys_initcall(essiv_module_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) module_exit(essiv_module_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) MODULE_DESCRIPTION("ESSIV skcipher/aead wrapper for block encryption");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) MODULE_LICENSE("GPL v2");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) MODULE_ALIAS_CRYPTO("essiv");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) MODULE_IMPORT_NS(CRYPTO_INTERNAL);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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