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crypto: sha256 - Switch to shash
This patch changes sha256 and sha224 to the new shash interface. Signed-off-by: Adrian-Ken Rueegsegger <ken@codelabs.ch> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Adrian-Ken Rueegsegger
Herbert Xu
parent
14b75ba70d
commit
50e109b5b9
2 changed files with 57 additions and 49 deletions
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@ -357,7 +357,7 @@ config CRYPTO_SHA1
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config CRYPTO_SHA256
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tristate "SHA224 and SHA256 digest algorithm"
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select CRYPTO_ALGAPI
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select CRYPTO_HASH
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help
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SHA256 secure hash standard (DFIPS 180-2).
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@ -17,10 +17,10 @@
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* any later version.
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*
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*/
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#include <crypto/internal/hash.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/mm.h>
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#include <linux/crypto.h>
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#include <linux/types.h>
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#include <crypto/sha.h>
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#include <asm/byteorder.h>
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@ -69,7 +69,7 @@ static void sha256_transform(u32 *state, const u8 *input)
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/* now blend */
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for (i = 16; i < 64; i++)
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BLEND_OP(i, W);
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/* load the state into our registers */
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a=state[0]; b=state[1]; c=state[2]; d=state[3];
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e=state[4]; f=state[5]; g=state[6]; h=state[7];
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@ -220,9 +220,9 @@ static void sha256_transform(u32 *state, const u8 *input)
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}
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static void sha224_init(struct crypto_tfm *tfm)
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static int sha224_init(struct shash_desc *desc)
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{
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struct sha256_ctx *sctx = crypto_tfm_ctx(tfm);
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struct sha256_ctx *sctx = shash_desc_ctx(desc);
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sctx->state[0] = SHA224_H0;
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sctx->state[1] = SHA224_H1;
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sctx->state[2] = SHA224_H2;
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@ -233,11 +233,13 @@ static void sha224_init(struct crypto_tfm *tfm)
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sctx->state[7] = SHA224_H7;
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sctx->count[0] = 0;
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sctx->count[1] = 0;
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return 0;
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}
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static void sha256_init(struct crypto_tfm *tfm)
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static int sha256_init(struct shash_desc *desc)
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{
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struct sha256_ctx *sctx = crypto_tfm_ctx(tfm);
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struct sha256_ctx *sctx = shash_desc_ctx(desc);
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sctx->state[0] = SHA256_H0;
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sctx->state[1] = SHA256_H1;
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sctx->state[2] = SHA256_H2;
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@ -247,12 +249,14 @@ static void sha256_init(struct crypto_tfm *tfm)
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sctx->state[6] = SHA256_H6;
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sctx->state[7] = SHA256_H7;
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sctx->count[0] = sctx->count[1] = 0;
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return 0;
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}
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static void sha256_update(struct crypto_tfm *tfm, const u8 *data,
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static int sha256_update(struct shash_desc *desc, const u8 *data,
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unsigned int len)
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{
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struct sha256_ctx *sctx = crypto_tfm_ctx(tfm);
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struct sha256_ctx *sctx = shash_desc_ctx(desc);
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unsigned int i, index, part_len;
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/* Compute number of bytes mod 128 */
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@ -277,14 +281,16 @@ static void sha256_update(struct crypto_tfm *tfm, const u8 *data,
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} else {
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i = 0;
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}
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/* Buffer remaining input */
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memcpy(&sctx->buf[index], &data[i], len-i);
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return 0;
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}
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static void sha256_final(struct crypto_tfm *tfm, u8 *out)
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static int sha256_final(struct shash_desc *desc, u8 *out)
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{
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struct sha256_ctx *sctx = crypto_tfm_ctx(tfm);
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struct sha256_ctx *sctx = shash_desc_ctx(desc);
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__be32 *dst = (__be32 *)out;
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__be32 bits[2];
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unsigned int index, pad_len;
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@ -298,10 +304,10 @@ static void sha256_final(struct crypto_tfm *tfm, u8 *out)
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/* Pad out to 56 mod 64. */
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index = (sctx->count[0] >> 3) & 0x3f;
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pad_len = (index < 56) ? (56 - index) : ((64+56) - index);
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sha256_update(tfm, padding, pad_len);
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sha256_update(desc, padding, pad_len);
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/* Append length (before padding) */
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sha256_update(tfm, (const u8 *)bits, sizeof(bits));
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sha256_update(desc, (const u8 *)bits, sizeof(bits));
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/* Store state in digest */
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for (i = 0; i < 8; i++)
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@ -309,71 +315,73 @@ static void sha256_final(struct crypto_tfm *tfm, u8 *out)
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/* Zeroize sensitive information. */
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memset(sctx, 0, sizeof(*sctx));
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return 0;
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}
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static void sha224_final(struct crypto_tfm *tfm, u8 *hash)
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static int sha224_final(struct shash_desc *desc, u8 *hash)
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{
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u8 D[SHA256_DIGEST_SIZE];
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sha256_final(tfm, D);
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sha256_final(desc, D);
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memcpy(hash, D, SHA224_DIGEST_SIZE);
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memset(D, 0, SHA256_DIGEST_SIZE);
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return 0;
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}
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static struct crypto_alg sha256 = {
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.cra_name = "sha256",
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.cra_driver_name= "sha256-generic",
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.cra_flags = CRYPTO_ALG_TYPE_DIGEST,
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.cra_blocksize = SHA256_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct sha256_ctx),
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.cra_module = THIS_MODULE,
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.cra_alignmask = 3,
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.cra_list = LIST_HEAD_INIT(sha256.cra_list),
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.cra_u = { .digest = {
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.dia_digestsize = SHA256_DIGEST_SIZE,
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.dia_init = sha256_init,
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.dia_update = sha256_update,
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.dia_final = sha256_final } }
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static struct shash_alg sha256 = {
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.digestsize = SHA256_DIGEST_SIZE,
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.init = sha256_init,
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.update = sha256_update,
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.final = sha256_final,
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.descsize = sizeof(struct sha256_ctx),
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.base = {
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.cra_name = "sha256",
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.cra_driver_name= "sha256-generic",
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.cra_flags = CRYPTO_ALG_TYPE_SHASH,
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.cra_blocksize = SHA256_BLOCK_SIZE,
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.cra_module = THIS_MODULE,
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}
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};
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static struct crypto_alg sha224 = {
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.cra_name = "sha224",
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.cra_driver_name = "sha224-generic",
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.cra_flags = CRYPTO_ALG_TYPE_DIGEST,
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.cra_blocksize = SHA224_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct sha256_ctx),
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.cra_module = THIS_MODULE,
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.cra_alignmask = 3,
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.cra_list = LIST_HEAD_INIT(sha224.cra_list),
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.cra_u = { .digest = {
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.dia_digestsize = SHA224_DIGEST_SIZE,
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.dia_init = sha224_init,
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.dia_update = sha256_update,
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.dia_final = sha224_final } }
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static struct shash_alg sha224 = {
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.digestsize = SHA224_DIGEST_SIZE,
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.init = sha224_init,
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.update = sha256_update,
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.final = sha224_final,
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.descsize = sizeof(struct sha256_ctx),
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.base = {
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.cra_name = "sha224",
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.cra_driver_name= "sha224-generic",
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.cra_flags = CRYPTO_ALG_TYPE_SHASH,
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.cra_blocksize = SHA224_BLOCK_SIZE,
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.cra_module = THIS_MODULE,
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}
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};
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static int __init sha256_generic_mod_init(void)
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{
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int ret = 0;
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ret = crypto_register_alg(&sha224);
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ret = crypto_register_shash(&sha224);
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if (ret < 0)
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return ret;
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ret = crypto_register_alg(&sha256);
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ret = crypto_register_shash(&sha256);
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if (ret < 0)
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crypto_unregister_alg(&sha224);
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crypto_unregister_shash(&sha224);
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return ret;
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}
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static void __exit sha256_generic_mod_fini(void)
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{
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crypto_unregister_alg(&sha224);
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crypto_unregister_alg(&sha256);
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crypto_unregister_shash(&sha224);
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crypto_unregister_shash(&sha256);
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}
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module_init(sha256_generic_mod_init);
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