From 90451d6bdb787e1631c6ce4619221eb59562343c Mon Sep 17 00:00:00 2001 From: Ard Biesheuvel Date: Thu, 9 Apr 2015 12:55:39 +0200 Subject: crypto: arm/sha1 - move SHA-1 ARM asm implementation to base layer This removes all the boilerplate from the existing implementation, and replaces it with calls into the base layer. Signed-off-by: Ard Biesheuvel Signed-off-by: Herbert Xu --- arch/arm/crypto/sha1-ce-glue.c | 3 +- arch/arm/crypto/sha1.h | 13 +++++ arch/arm/crypto/sha1_glue.c | 112 ++++++--------------------------------- arch/arm/crypto/sha1_neon_glue.c | 2 +- 4 files changed, 32 insertions(+), 98 deletions(-) create mode 100644 arch/arm/crypto/sha1.h (limited to 'arch/arm/crypto') diff --git a/arch/arm/crypto/sha1-ce-glue.c b/arch/arm/crypto/sha1-ce-glue.c index a9dd90df9fd7..e93b24c1af1f 100644 --- a/arch/arm/crypto/sha1-ce-glue.c +++ b/arch/arm/crypto/sha1-ce-glue.c @@ -13,12 +13,13 @@ #include #include -#include #include #include #include #include +#include "sha1.h" + MODULE_DESCRIPTION("SHA1 secure hash using ARMv8 Crypto Extensions"); MODULE_AUTHOR("Ard Biesheuvel "); MODULE_LICENSE("GPL v2"); diff --git a/arch/arm/crypto/sha1.h b/arch/arm/crypto/sha1.h new file mode 100644 index 000000000000..ffd8bd08b1a7 --- /dev/null +++ b/arch/arm/crypto/sha1.h @@ -0,0 +1,13 @@ +#ifndef ASM_ARM_CRYPTO_SHA1_H +#define ASM_ARM_CRYPTO_SHA1_H + +#include +#include + +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 diff --git a/arch/arm/crypto/sha1_glue.c b/arch/arm/crypto/sha1_glue.c index e31b0440c613..6fc73bf8766d 100644 --- a/arch/arm/crypto/sha1_glue.c +++ b/arch/arm/crypto/sha1_glue.c @@ -22,127 +22,47 @@ #include #include #include +#include #include -#include +#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) -{ - 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; -} - - 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; + /* make sure casting to sha1_block_fn() is safe */ + BUILD_BUG_ON(offsetof(struct sha1_state, state) != 0); - /* 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 sha1_base_do_update(desc, data, len, + (sha1_block_fn *)sha1_block_data_order); } EXPORT_SYMBOL_GPL(sha1_update_arm); - -/* 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); - 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; + sha1_base_do_finalize(desc, (sha1_block_fn *)sha1_block_data_order); + return sha1_base_finish(desc, out); } - -static int sha1_export(struct shash_desc *desc, void *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); - memcpy(out, sctx, sizeof(*sctx)); - return 0; + sha1_base_do_update(desc, data, len, + (sha1_block_fn *)sha1_block_data_order); + return sha1_final(desc, out); } - - -static int sha1_import(struct shash_desc *desc, const void *in) -{ - struct sha1_state *sctx = shash_desc_ctx(desc); - memcpy(sctx, in, sizeof(*sctx)); - return 0; -} - +EXPORT_SYMBOL_GPL(sha1_finup_arm); static struct shash_alg alg = { .digestsize = SHA1_DIGEST_SIZE, - .init = sha1_init, + .init = sha1_base_init, .update = sha1_update_arm, .final = sha1_final, - .export = sha1_export, - .import = sha1_import, + .finup = sha1_finup_arm, .descsize = sizeof(struct sha1_state), - .statesize = sizeof(struct sha1_state), .base = { .cra_name = "sha1", .cra_driver_name= "sha1-asm", diff --git a/arch/arm/crypto/sha1_neon_glue.c b/arch/arm/crypto/sha1_neon_glue.c index 0b0083757d47..5d9a1b4aac73 100644 --- a/arch/arm/crypto/sha1_neon_glue.c +++ b/arch/arm/crypto/sha1_neon_glue.c @@ -28,8 +28,8 @@ #include #include #include -#include +#include "sha1.h" asmlinkage void sha1_transform_neon(void *state_h, const char *data, unsigned int rounds); -- cgit v1.2.3