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crypto: sha256_ssse3 - add sha224 support

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Add sha224 implementation to sha256_ssse3 module.

This also fixes sha256_ssse3 module autoloading issue when 'sha224' is used
before 'sha256'. Previously in such case, just sha256_generic was loaded and
not sha256_ssse3 (since it did not provide sha224). Now if 'sha256' was used
after 'sha224' usage, sha256_ssse3 would remain unloaded.

Cc: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Jussi Kivilinna 2013-05-21 17:10:49 +03:00 • committed by Herbert Xu
parent 340991e30c
commit a710f761fc
1 changed files with 52 additions and 5 deletions
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57
arch/x86/crypto/sha256_ssse3_glue.c
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@ -187,7 +187,36 @@ static int sha256_ssse3_import(struct shash_desc *desc, const void *in)
return 0; return 0;
} }
static struct shash_alg alg = { static int sha224_ssse3_init(struct shash_desc *desc)
{
struct sha256_state *sctx = shash_desc_ctx(desc);
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;
return 0;
}
static int sha224_ssse3_final(struct shash_desc *desc, u8 *hash)
{
u8 D[SHA256_DIGEST_SIZE];
sha256_ssse3_final(desc, D);
memcpy(hash, D, SHA224_DIGEST_SIZE);
memset(D, 0, SHA256_DIGEST_SIZE);
return 0;
}
static struct shash_alg algs[] = { {
.digestsize = SHA256_DIGEST_SIZE, .digestsize = SHA256_DIGEST_SIZE,
.init = sha256_ssse3_init, .init = sha256_ssse3_init,
.update = sha256_ssse3_update, .update = sha256_ssse3_update,
@ -204,7 +233,24 @@ static struct shash_alg alg = {
.cra_blocksize = SHA256_BLOCK_SIZE, .cra_blocksize = SHA256_BLOCK_SIZE,
.cra_module = THIS_MODULE, .cra_module = THIS_MODULE,
} }
}; }, {
.digestsize = SHA224_DIGEST_SIZE,
.init = sha224_ssse3_init,
.update = sha256_ssse3_update,
.final = sha224_ssse3_final,
.export = sha256_ssse3_export,
.import = sha256_ssse3_import,
.descsize = sizeof(struct sha256_state),
.statesize = sizeof(struct sha256_state),
.base = {
.cra_name = "sha224",
.cra_driver_name = "sha224-ssse3",
.cra_priority = 150,
.cra_flags = CRYPTO_ALG_TYPE_SHASH,
.cra_blocksize = SHA224_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
} };
#ifdef CONFIG_AS_AVX #ifdef CONFIG_AS_AVX
static bool __init avx_usable(void) static bool __init avx_usable(void)
@ -227,7 +273,7 @@ static bool __init avx_usable(void)
static int __init sha256_ssse3_mod_init(void) static int __init sha256_ssse3_mod_init(void)
{ {
/* test for SSE3 first */ /* test for SSSE3 first */
if (cpu_has_ssse3) if (cpu_has_ssse3)
sha256_transform_asm = sha256_transform_ssse3; sha256_transform_asm = sha256_transform_ssse3;
@ -254,7 +300,7 @@ static int __init sha256_ssse3_mod_init(void)
else else
#endif #endif
pr_info("Using SSSE3 optimized SHA-256 implementation\n"); pr_info("Using SSSE3 optimized SHA-256 implementation\n");
return crypto_register_shash(&alg); return crypto_register_shashes(algs, ARRAY_SIZE(algs));
} }
pr_info("Neither AVX nor SSSE3 is available/usable.\n"); pr_info("Neither AVX nor SSSE3 is available/usable.\n");
@ -263,7 +309,7 @@ static int __init sha256_ssse3_mod_init(void)
static void __exit sha256_ssse3_mod_fini(void) static void __exit sha256_ssse3_mod_fini(void)
{ {
crypto_unregister_shash(&alg); crypto_unregister_shashes(algs, ARRAY_SIZE(algs));
} }
module_init(sha256_ssse3_mod_init); module_init(sha256_ssse3_mod_init);
@ -273,3 +319,4 @@ MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SHA256 Secure Hash Algorithm, Supplemental SSE3 accelerated"); MODULE_DESCRIPTION("SHA256 Secure Hash Algorithm, Supplemental SSE3 accelerated");
MODULE_ALIAS("sha256"); MODULE_ALIAS("sha256");
MODULE_ALIAS("sha384");