@@ -11,6 +11,7 @@ if ARM_CRYPTO
config CRYPTO_SHA1_ARM
tristate "SHA1 digest algorithm (ARM-asm)"
select CRYPTO_SHA1
+ select CRYPTO_SHA1_BASE
select CRYPTO_HASH
help
SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2) implemented
similarity index 67%
rename from arch/arm/include/asm/crypto/sha1.h
rename to arch/arm/crypto/sha1.h
@@ -7,4 +7,7 @@
extern int sha1_update_arm(struct shash_desc *desc, const u8 *data,
unsigned int len);
+extern int sha1_finup_arm(struct shash_desc *desc, const u8 *data,
+ unsigned int len, u8 *out);
+
#endif
@@ -23,124 +23,55 @@
#include <linux/types.h>
#include <crypto/sha.h>
#include <asm/byteorder.h>
-#include <asm/crypto/sha1.h>
+#include "sha1.h"
asmlinkage void sha1_block_data_order(u32 *digest,
const unsigned char *data, unsigned int rounds);
-
-static int sha1_init(struct shash_desc *desc)
-{
- struct sha1_state *sctx = shash_desc_ctx(desc);
-
- *sctx = (struct sha1_state){
- .state = { SHA1_H0, SHA1_H1, SHA1_H2, SHA1_H3, SHA1_H4 },
- };
-
- return 0;
-}
-
-
-static int __sha1_update(struct sha1_state *sctx, const u8 *data,
- unsigned int len, unsigned int partial)
+static void sha1_arm_block_fn(int blocks, u8 const *src, u32 *state,
+ const u8 *head, void *p)
{
- unsigned int done = 0;
-
- sctx->count += len;
-
- if (partial) {
- done = SHA1_BLOCK_SIZE - partial;
- memcpy(sctx->buffer + partial, data, done);
- sha1_block_data_order(sctx->state, sctx->buffer, 1);
- }
-
- if (len - done >= SHA1_BLOCK_SIZE) {
- const unsigned int rounds = (len - done) / SHA1_BLOCK_SIZE;
- sha1_block_data_order(sctx->state, data + done, rounds);
- done += rounds * SHA1_BLOCK_SIZE;
- }
-
- memcpy(sctx->buffer, data + done, len - done);
- return 0;
+ if (head)
+ sha1_block_data_order(state, head, 1);
+ if (blocks)
+ sha1_block_data_order(state, src, blocks);
}
-
int sha1_update_arm(struct shash_desc *desc, const u8 *data,
unsigned int len)
{
- struct sha1_state *sctx = shash_desc_ctx(desc);
- unsigned int partial = sctx->count % SHA1_BLOCK_SIZE;
- int res;
-
- /* Handle the fast case right here */
- if (partial + len < SHA1_BLOCK_SIZE) {
- sctx->count += len;
- memcpy(sctx->buffer + partial, data, len);
- return 0;
- }
- res = __sha1_update(sctx, data, len, partial);
- return res;
+ return crypto_sha1_base_do_update(desc, data, len, sha1_arm_block_fn,
+ NULL);
}
EXPORT_SYMBOL_GPL(sha1_update_arm);
-
-/* Add padding and return the message digest. */
-static int sha1_final(struct shash_desc *desc, u8 *out)
+int sha1_finup_arm(struct shash_desc *desc, const u8 *data,
+ unsigned int len, u8 *out)
{
- struct sha1_state *sctx = shash_desc_ctx(desc);
- unsigned int i, index, padlen;
- __be32 *dst = (__be32 *)out;
- __be64 bits;
- static const u8 padding[SHA1_BLOCK_SIZE] = { 0x80, };
-
- bits = cpu_to_be64(sctx->count << 3);
-
- /* Pad out to 56 mod 64 and append length */
- index = sctx->count % SHA1_BLOCK_SIZE;
- padlen = (index < 56) ? (56 - index) : ((SHA1_BLOCK_SIZE+56) - index);
- /* We need to fill a whole block for __sha1_update() */
- if (padlen <= 56) {
- sctx->count += padlen;
- memcpy(sctx->buffer + index, padding, padlen);
- } else {
- __sha1_update(sctx, padding, padlen, index);
- }
- __sha1_update(sctx, (const u8 *)&bits, sizeof(bits), 56);
-
- /* Store state in digest */
- for (i = 0; i < 5; i++)
- dst[i] = cpu_to_be32(sctx->state[i]);
-
- /* Wipe context */
- memset(sctx, 0, sizeof(*sctx));
- return 0;
-}
-
+ if (len)
+ crypto_sha1_base_do_update(desc, data, len,
+ sha1_arm_block_fn, NULL);
+ crypto_sha1_base_do_finalize(desc, sha1_arm_block_fn, NULL);
-static int sha1_export(struct shash_desc *desc, void *out)
-{
- struct sha1_state *sctx = shash_desc_ctx(desc);
- memcpy(out, sctx, sizeof(*sctx));
- return 0;
+ return crypto_sha1_base_finish(desc, out);
}
+EXPORT_SYMBOL_GPL(sha1_finup_arm);
-
-static int sha1_import(struct shash_desc *desc, const void *in)
+/* Add padding and return the message digest. */
+static int sha1_final(struct shash_desc *desc, u8 *out)
{
- struct sha1_state *sctx = shash_desc_ctx(desc);
- memcpy(sctx, in, sizeof(*sctx));
- return 0;
+ return sha1_finup_arm(desc, NULL, 0, out);
}
-
static struct shash_alg alg = {
.digestsize = SHA1_DIGEST_SIZE,
- .init = sha1_init,
+ .init = crypto_sha1_base_init,
.update = sha1_update_arm,
.final = sha1_final,
- .export = sha1_export,
- .import = sha1_import,
+ .finup = sha1_finup_arm,
+ .export = crypto_sha1_base_export,
+ .import = crypto_sha1_base_import,
.descsize = sizeof(struct sha1_state),
.statesize = sizeof(struct sha1_state),
.base = {
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> --- arch/arm/crypto/Kconfig | 1 + arch/arm/{include/asm => }/crypto/sha1.h | 3 + arch/arm/crypto/sha1_glue.c | 117 +++++++------------------------ 3 files changed, 28 insertions(+), 93 deletions(-) rename arch/arm/{include/asm => }/crypto/sha1.h (67%)