diff options
Diffstat (limited to 'crypto/sha256_generic.c')
| -rw-r--r-- | crypto/sha256_generic.c | 72 |
1 files changed, 64 insertions, 8 deletions
diff --git a/crypto/sha256_generic.c b/crypto/sha256_generic.c index fd3918b..3cc93fd 100644 --- a/crypto/sha256_generic.c +++ b/crypto/sha256_generic.c @@ -9,6 +9,7 @@ * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com> * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk> * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> + * SHA224 Support Copyright 2007 Intel Corporation <jonathan.lynch@intel.com> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the Free @@ -218,6 +219,22 @@ static void sha256_transform(u32 *state, const u8 *input) memset(W, 0, 64 * sizeof(u32)); } + +static void sha224_init(struct crypto_tfm *tfm) +{ + struct sha256_ctx *sctx = crypto_tfm_ctx(tfm); + sctx->state[0] = SHA224_H0; + sctx->state[1] = SHA224_H1; + sctx->state[2] = SHA224_H2; + sctx->state[3] = SHA224_H3; + sctx->state[4] = SHA224_H4; + sctx->state[5] = SHA224_H5; + sctx->state[6] = SHA224_H6; + sctx->state[7] = SHA224_H7; + sctx->count[0] = 0; + sctx->count[1] = 0; +} + static void sha256_init(struct crypto_tfm *tfm) { struct sha256_ctx *sctx = crypto_tfm_ctx(tfm); @@ -294,8 +311,17 @@ static void sha256_final(struct crypto_tfm *tfm, u8 *out) memset(sctx, 0, sizeof(*sctx)); } +static void sha224_final(struct crypto_tfm *tfm, u8 *hash) +{ + u8 D[SHA256_DIGEST_SIZE]; + + sha256_final(tfm, D); + + memcpy(hash, D, SHA224_DIGEST_SIZE); + memset(D, 0, SHA256_DIGEST_SIZE); +} -static struct crypto_alg alg = { +static struct crypto_alg sha256 = { .cra_name = "sha256", .cra_driver_name= "sha256-generic", .cra_flags = CRYPTO_ALG_TYPE_DIGEST, @@ -303,28 +329,58 @@ static struct crypto_alg alg = { .cra_ctxsize = sizeof(struct sha256_ctx), .cra_module = THIS_MODULE, .cra_alignmask = 3, - .cra_list = LIST_HEAD_INIT(alg.cra_list), + .cra_list = LIST_HEAD_INIT(sha256.cra_list), .cra_u = { .digest = { .dia_digestsize = SHA256_DIGEST_SIZE, - .dia_init = sha256_init, - .dia_update = sha256_update, - .dia_final = sha256_final } } + .dia_init = sha256_init, + .dia_update = sha256_update, + .dia_final = sha256_final } } +}; + +static struct crypto_alg sha224 = { + .cra_name = "sha224", + .cra_driver_name = "sha224-generic", + .cra_flags = CRYPTO_ALG_TYPE_DIGEST, + .cra_blocksize = SHA224_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct sha256_ctx), + .cra_module = THIS_MODULE, + .cra_alignmask = 3, + .cra_list = LIST_HEAD_INIT(sha224.cra_list), + .cra_u = { .digest = { + .dia_digestsize = SHA224_DIGEST_SIZE, + .dia_init = sha224_init, + .dia_update = sha256_update, + .dia_final = sha224_final } } }; static int __init init(void) { - return crypto_register_alg(&alg); + int ret = 0; + + ret = crypto_register_alg(&sha224); + + if (ret < 0) + return ret; + + ret = crypto_register_alg(&sha256); + + if (ret < 0) + crypto_unregister_alg(&sha224); + + return ret; } static void __exit fini(void) { - crypto_unregister_alg(&alg); + crypto_unregister_alg(&sha224); + crypto_unregister_alg(&sha256); } module_init(init); module_exit(fini); MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("SHA256 Secure Hash Algorithm"); +MODULE_DESCRIPTION("SHA-224 and SHA-256 Secure Hash Algorithm"); +MODULE_ALIAS("sha224"); MODULE_ALIAS("sha256"); |