From 9c4274d90d2923dda7435073de6494f0250ccb5a Mon Sep 17 00:00:00 2001 From: Cyrille Pitchen Date: Mon, 8 Feb 2016 16:26:48 +0100 Subject: [PATCH] crypto: atmel-sha - fix .import()/.export() implementation Using only the digest, digcnt[], bufcnt and buffer[] fields of the struct atmel_sha_reqctx was not enough to import/export the request state, so now we use the whole structure. Signed-off-by: Cyrille Pitchen Signed-off-by: Herbert Xu --- drivers/crypto/atmel-sha.c | 44 +++++++++----------------------------- 1 file changed, 10 insertions(+), 34 deletions(-) diff --git a/drivers/crypto/atmel-sha.c b/drivers/crypto/atmel-sha.c index 63b09e01075c..e4757f8957ae 100644 --- a/drivers/crypto/atmel-sha.c +++ b/drivers/crypto/atmel-sha.c @@ -81,16 +81,9 @@ struct atmel_sha_caps { struct atmel_sha_dev; /* - * .statesize = sizeof(struct atmel_sha_state) must be <= PAGE_SIZE / 8 as + * .statesize = sizeof(struct atmel_sha_reqctx) must be <= PAGE_SIZE / 8 as * tested by the ahash_prepare_alg() function. */ -struct atmel_sha_state { - u8 digest[SHA512_DIGEST_SIZE]; - u8 buffer[SHA_BUFFER_LEN]; - u64 digcnt[2]; - size_t bufcnt; -}; - struct atmel_sha_reqctx { struct atmel_sha_dev *dd; unsigned long flags; @@ -109,7 +102,7 @@ struct atmel_sha_reqctx { size_t block_size; - u8 buffer[0] __aligned(sizeof(u32)); + u8 buffer[SHA_BUFFER_LEN + SHA512_BLOCK_SIZE] __aligned(sizeof(u32)); }; struct atmel_sha_ctx { @@ -1048,40 +1041,23 @@ static int atmel_sha_digest(struct ahash_request *req) static int atmel_sha_export(struct ahash_request *req, void *out) { const struct atmel_sha_reqctx *ctx = ahash_request_ctx(req); - struct atmel_sha_state state; - - memcpy(state.digest, ctx->digest, SHA512_DIGEST_SIZE); - memcpy(state.buffer, ctx->buffer, ctx->bufcnt); - state.bufcnt = ctx->bufcnt; - state.digcnt[0] = ctx->digcnt[0]; - state.digcnt[1] = ctx->digcnt[1]; - /* out might be unaligned. */ - memcpy(out, &state, sizeof(state)); + memcpy(out, ctx, sizeof(*ctx)); return 0; } static int atmel_sha_import(struct ahash_request *req, const void *in) { struct atmel_sha_reqctx *ctx = ahash_request_ctx(req); - struct atmel_sha_state state; - - /* in might be unaligned. */ - memcpy(&state, in, sizeof(state)); - memcpy(ctx->digest, state.digest, SHA512_DIGEST_SIZE); - memcpy(ctx->buffer, state.buffer, state.bufcnt); - ctx->bufcnt = state.bufcnt; - ctx->digcnt[0] = state.digcnt[0]; - ctx->digcnt[1] = state.digcnt[1]; + memcpy(ctx, in, sizeof(*ctx)); return 0; } static int atmel_sha_cra_init(struct crypto_tfm *tfm) { crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), - sizeof(struct atmel_sha_reqctx) + - SHA_BUFFER_LEN + SHA512_BLOCK_SIZE); + sizeof(struct atmel_sha_reqctx)); return 0; } @@ -1097,7 +1073,7 @@ static struct ahash_alg sha_1_256_algs[] = { .import = atmel_sha_import, .halg = { .digestsize = SHA1_DIGEST_SIZE, - .statesize = sizeof(struct atmel_sha_state), + .statesize = sizeof(struct atmel_sha_reqctx), .base = { .cra_name = "sha1", .cra_driver_name = "atmel-sha1", @@ -1121,7 +1097,7 @@ static struct ahash_alg sha_1_256_algs[] = { .import = atmel_sha_import, .halg = { .digestsize = SHA256_DIGEST_SIZE, - .statesize = sizeof(struct atmel_sha_state), + .statesize = sizeof(struct atmel_sha_reqctx), .base = { .cra_name = "sha256", .cra_driver_name = "atmel-sha256", @@ -1147,7 +1123,7 @@ static struct ahash_alg sha_224_alg = { .import = atmel_sha_import, .halg = { .digestsize = SHA224_DIGEST_SIZE, - .statesize = sizeof(struct atmel_sha_state), + .statesize = sizeof(struct atmel_sha_reqctx), .base = { .cra_name = "sha224", .cra_driver_name = "atmel-sha224", @@ -1173,7 +1149,7 @@ static struct ahash_alg sha_384_512_algs[] = { .import = atmel_sha_import, .halg = { .digestsize = SHA384_DIGEST_SIZE, - .statesize = sizeof(struct atmel_sha_state), + .statesize = sizeof(struct atmel_sha_reqctx), .base = { .cra_name = "sha384", .cra_driver_name = "atmel-sha384", @@ -1197,7 +1173,7 @@ static struct ahash_alg sha_384_512_algs[] = { .import = atmel_sha_import, .halg = { .digestsize = SHA512_DIGEST_SIZE, - .statesize = sizeof(struct atmel_sha_state), + .statesize = sizeof(struct atmel_sha_reqctx), .base = { .cra_name = "sha512", .cra_driver_name = "atmel-sha512", -- 2.20.1