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ARM: 8118/1: crypto: sha1/make use of common SHA-1 structures

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Common SHA-1 structures are defined in <crypto/sha.h> for code sharing.

This patch changes SHA-1/ARM glue code to use these structures.

Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Jussi Kivilinna 2014-07-29 17:14:09 +01:00 committed by Russell King
parent c6f54a9b39
commit 1f8673d31a
1 changed files with 22 additions and 28 deletions

50
arch/arm/crypto/sha1_glue.c

@ -24,31 +24,25 @@
#include <crypto/sha.h> #include <crypto/sha.h>
#include <asm/byteorder.h> #include <asm/byteorder.h>
struct SHA1_CTX {
uint32_t h0,h1,h2,h3,h4;
u64 count;
u8 data[SHA1_BLOCK_SIZE];
};
asmlinkage void sha1_block_data_order(struct SHA1_CTX *digest, asmlinkage void sha1_block_data_order(u32 *digest,
const unsigned char *data, unsigned int rounds); const unsigned char *data, unsigned int rounds);
static int sha1_init(struct shash_desc *desc) static int sha1_init(struct shash_desc *desc)
{ {
struct SHA1_CTX *sctx = shash_desc_ctx(desc); struct sha1_state *sctx = shash_desc_ctx(desc);
memset(sctx, 0, sizeof(*sctx));
sctx->h0 = SHA1_H0; *sctx = (struct sha1_state){
sctx->h1 = SHA1_H1; .state = { SHA1_H0, SHA1_H1, SHA1_H2, SHA1_H3, SHA1_H4 },
sctx->h2 = SHA1_H2; };
sctx->h3 = SHA1_H3;
sctx->h4 = SHA1_H4;
return 0; return 0;
} }
static int __sha1_update(struct SHA1_CTX *sctx, const u8 *data, static int __sha1_update(struct sha1_state *sctx, const u8 *data,
unsigned int len, unsigned int partial) unsigned int len, unsigned int partial)
{ {
unsigned int done = 0; unsigned int done = 0;
@ -56,17 +50,17 @@ static int __sha1_update(struct SHA1_CTX *sctx, const u8 *data,
if (partial) { if (partial) {
done = SHA1_BLOCK_SIZE - partial; done = SHA1_BLOCK_SIZE - partial;
memcpy(sctx->data + partial, data, done); memcpy(sctx->buffer + partial, data, done);
sha1_block_data_order(sctx, sctx->data, 1); sha1_block_data_order(sctx->state, sctx->buffer, 1);
} }
if (len - done >= SHA1_BLOCK_SIZE) { if (len - done >= SHA1_BLOCK_SIZE) {
const unsigned int rounds = (len - done) / SHA1_BLOCK_SIZE; const unsigned int rounds = (len - done) / SHA1_BLOCK_SIZE;
sha1_block_data_order(sctx, data + done, rounds); sha1_block_data_order(sctx->state, data + done, rounds);
done += rounds * SHA1_BLOCK_SIZE; done += rounds * SHA1_BLOCK_SIZE;
} }
memcpy(sctx->data, data + done, len - done); memcpy(sctx->buffer, data + done, len - done);
return 0; return 0;
} }
@ -74,14 +68,14 @@ static int __sha1_update(struct SHA1_CTX *sctx, const u8 *data,
static int sha1_update(struct shash_desc *desc, const u8 *data, static int sha1_update(struct shash_desc *desc, const u8 *data,
unsigned int len) unsigned int len)
{ {
struct SHA1_CTX *sctx = shash_desc_ctx(desc); struct sha1_state *sctx = shash_desc_ctx(desc);
unsigned int partial = sctx->count % SHA1_BLOCK_SIZE; unsigned int partial = sctx->count % SHA1_BLOCK_SIZE;
int res; int res;
/* Handle the fast case right here */ /* Handle the fast case right here */
if (partial + len < SHA1_BLOCK_SIZE) { if (partial + len < SHA1_BLOCK_SIZE) {
sctx->count += len; sctx->count += len;
memcpy(sctx->data + partial, data, len); memcpy(sctx->buffer + partial, data, len);
return 0; return 0;
} }
res = __sha1_update(sctx, data, len, partial); res = __sha1_update(sctx, data, len, partial);
@ -92,7 +86,7 @@ static int sha1_update(struct shash_desc *desc, const u8 *data,
/* Add padding and return the message digest. */ /* Add padding and return the message digest. */
static int sha1_final(struct shash_desc *desc, u8 *out) static int sha1_final(struct shash_desc *desc, u8 *out)
{ {
struct SHA1_CTX *sctx = shash_desc_ctx(desc); struct sha1_state *sctx = shash_desc_ctx(desc);
unsigned int i, index, padlen; unsigned int i, index, padlen;
__be32 *dst = (__be32 *)out; __be32 *dst = (__be32 *)out;
__be64 bits; __be64 bits;
@ -106,7 +100,7 @@ static int sha1_final(struct shash_desc *desc, u8 *out)
/* We need to fill a whole block for __sha1_update() */ /* We need to fill a whole block for __sha1_update() */
if (padlen <= 56) { if (padlen <= 56) {
sctx->count += padlen; sctx->count += padlen;
memcpy(sctx->data + index, padding, padlen); memcpy(sctx->buffer + index, padding, padlen);
} else { } else {
__sha1_update(sctx, padding, padlen, index); __sha1_update(sctx, padding, padlen, index);
} }
@ -114,7 +108,7 @@ static int sha1_final(struct shash_desc *desc, u8 *out)
/* Store state in digest */ /* Store state in digest */
for (i = 0; i < 5; i++) for (i = 0; i < 5; i++)
dst[i] = cpu_to_be32(((u32 *)sctx)[i]); dst[i] = cpu_to_be32(sctx->state[i]);
/* Wipe context */ /* Wipe context */
memset(sctx, 0, sizeof(*sctx)); memset(sctx, 0, sizeof(*sctx));
@ -124,7 +118,7 @@ static int sha1_final(struct shash_desc *desc, u8 *out)
static int sha1_export(struct shash_desc *desc, void *out) static int sha1_export(struct shash_desc *desc, void *out)
{ {
struct SHA1_CTX *sctx = shash_desc_ctx(desc); struct sha1_state *sctx = shash_desc_ctx(desc);
memcpy(out, sctx, sizeof(*sctx)); memcpy(out, sctx, sizeof(*sctx));
return 0; return 0;
} }
@ -132,7 +126,7 @@ static int sha1_export(struct shash_desc *desc, void *out)
static int sha1_import(struct shash_desc *desc, const void *in) static int sha1_import(struct shash_desc *desc, const void *in)
{ {
struct SHA1_CTX *sctx = shash_desc_ctx(desc); struct sha1_state *sctx = shash_desc_ctx(desc);
memcpy(sctx, in, sizeof(*sctx)); memcpy(sctx, in, sizeof(*sctx));
return 0; return 0;
} }
@ -145,8 +139,8 @@ static struct shash_alg alg = {
.final = sha1_final, .final = sha1_final,
.export = sha1_export, .export = sha1_export,
.import = sha1_import, .import = sha1_import,
.descsize = sizeof(struct SHA1_CTX), .descsize = sizeof(struct sha1_state),
.statesize = sizeof(struct SHA1_CTX), .statesize = sizeof(struct sha1_state),
.base = { .base = {
.cra_name = "sha1", .cra_name = "sha1",
.cra_driver_name= "sha1-asm", .cra_driver_name= "sha1-asm",