diff options
| author | Eric Biggers <ebiggers@kernel.org> | 2025-09-01 09:50:11 -0700 |
|---|---|---|
| committer | Eric Biggers <ebiggers@kernel.org> | 2025-09-02 19:02:35 -0700 |
| commit | 827733acbe4c3a0e117b6ebde5ed269fb7686427 (patch) | |
| tree | 040051a51515af0d0de9ef33c365712712b36b90 | |
| parent | fd7e5de4b2eddd34e3567cd419812d8869ef4f13 (diff) | |
crypto: sha1 - Implement export_core() and import_core()
Since commit 9d7a0ab1c753 ("crypto: ahash - Handle partial blocks in
API"), the recently-added export_core() and import_core() methods in
struct shash_alg have effectively become mandatory (even though it is
not tested or enforced), since legacy drivers that need a fallback
depend on them. Make crypto/sha1.c compatible with these legacy drivers
by adding export_core() and import_core() methods to it.
Reported-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Reported-by: Ovidiu Panait <ovidiu.panait.oss@gmail.com>
Closes: https://lore.kernel.org/r/aLSnCc9Ws5L9y+8X@gcabiddu-mobl.ger.corp.intel.com
Fixes: b10a74abcfc5 ("crypto: sha1 - Use same state format as legacy drivers")
Tested-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Tested-by: Ovidiu Panait <ovidiu.panait.oss@gmail.com>
Link: https://lore.kernel.org/r/20250901165013.48649-2-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
| -rw-r--r-- | crypto/sha1.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/crypto/sha1.c b/crypto/sha1.c index ecef4bf2d9c0..4fbf61cf0370 100644 --- a/crypto/sha1.c +++ b/crypto/sha1.c @@ -49,6 +49,18 @@ static int __crypto_sha1_import(struct sha1_ctx *ctx, const void *in) return 0; } +static int __crypto_sha1_export_core(const struct sha1_ctx *ctx, void *out) +{ + memcpy(out, ctx, offsetof(struct sha1_ctx, buf)); + return 0; +} + +static int __crypto_sha1_import_core(struct sha1_ctx *ctx, const void *in) +{ + memcpy(ctx, in, offsetof(struct sha1_ctx, buf)); + return 0; +} + const u8 sha1_zero_message_hash[SHA1_DIGEST_SIZE] = { 0xda, 0x39, 0xa3, 0xee, 0x5e, 0x6b, 0x4b, 0x0d, 0x32, 0x55, 0xbf, 0xef, 0x95, 0x60, 0x18, 0x90, @@ -94,6 +106,16 @@ static int crypto_sha1_import(struct shash_desc *desc, const void *in) return __crypto_sha1_import(SHA1_CTX(desc), in); } +static int crypto_sha1_export_core(struct shash_desc *desc, void *out) +{ + return __crypto_sha1_export_core(SHA1_CTX(desc), out); +} + +static int crypto_sha1_import_core(struct shash_desc *desc, const void *in) +{ + return __crypto_sha1_import_core(SHA1_CTX(desc), in); +} + #define HMAC_SHA1_KEY(tfm) ((struct hmac_sha1_key *)crypto_shash_ctx(tfm)) #define HMAC_SHA1_CTX(desc) ((struct hmac_sha1_ctx *)shash_desc_ctx(desc)) @@ -143,6 +165,19 @@ static int crypto_hmac_sha1_import(struct shash_desc *desc, const void *in) return __crypto_sha1_import(&ctx->sha_ctx, in); } +static int crypto_hmac_sha1_export_core(struct shash_desc *desc, void *out) +{ + return __crypto_sha1_export_core(&HMAC_SHA1_CTX(desc)->sha_ctx, out); +} + +static int crypto_hmac_sha1_import_core(struct shash_desc *desc, const void *in) +{ + struct hmac_sha1_ctx *ctx = HMAC_SHA1_CTX(desc); + + ctx->ostate = HMAC_SHA1_KEY(desc->tfm)->ostate; + return __crypto_sha1_import_core(&ctx->sha_ctx, in); +} + static struct shash_alg algs[] = { { .base.cra_name = "sha1", @@ -157,6 +192,8 @@ static struct shash_alg algs[] = { .digest = crypto_sha1_digest, .export = crypto_sha1_export, .import = crypto_sha1_import, + .export_core = crypto_sha1_export_core, + .import_core = crypto_sha1_import_core, .descsize = sizeof(struct sha1_ctx), .statesize = SHA1_SHASH_STATE_SIZE, }, @@ -175,6 +212,8 @@ static struct shash_alg algs[] = { .digest = crypto_hmac_sha1_digest, .export = crypto_hmac_sha1_export, .import = crypto_hmac_sha1_import, + .export_core = crypto_hmac_sha1_export_core, + .import_core = crypto_hmac_sha1_import_core, .descsize = sizeof(struct hmac_sha1_ctx), .statesize = SHA1_SHASH_STATE_SIZE, }, |