[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20250901165013.48649-2-ebiggers@kernel.org>
Date: Mon, 1 Sep 2025 09:50:11 -0700
From: Eric Biggers <ebiggers@...nel.org>
To: linux-crypto@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
Ard Biesheuvel <ardb@...nel.org>,
"Jason A . Donenfeld" <Jason@...c4.com>,
qat-linux@...el.com,
Giovanni Cabiddu <giovanni.cabiddu@...el.com>,
Ovidiu Panait <ovidiu.panait.oss@...il.com>,
Eric Biggers <ebiggers@...nel.org>
Subject: [PATCH 1/3] 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@...el.com>
Reported-by: Ovidiu Panait <ovidiu.panait.oss@...il.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")
Signed-off-by: Eric Biggers <ebiggers@...nel.org>
---
crypto/sha1.c | 39 +++++++++++++++++++++++++++++++++++++++
1 file changed, 39 insertions(+)
diff --git a/crypto/sha1.c b/crypto/sha1.c
index ecef4bf2d9c00..4fbf61cf03709 100644
--- a/crypto/sha1.c
+++ b/crypto/sha1.c
@@ -47,10 +47,22 @@ static int __crypto_sha1_import(struct sha1_ctx *ctx, const void *in)
p += sizeof(*ctx);
ctx->bytecount += *p;
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,
0xaf, 0xd8, 0x07, 0x09
};
@@ -92,10 +104,20 @@ static int crypto_sha1_export(struct shash_desc *desc, void *out)
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))
static int crypto_hmac_sha1_setkey(struct crypto_shash *tfm,
const u8 *raw_key, unsigned int keylen)
@@ -141,10 +163,23 @@ static int crypto_hmac_sha1_import(struct shash_desc *desc, const void *in)
ctx->ostate = HMAC_SHA1_KEY(desc->tfm)->ostate;
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",
.base.cra_driver_name = "sha1-lib",
.base.cra_priority = 300,
@@ -155,10 +190,12 @@ static struct shash_alg algs[] = {
.update = crypto_sha1_update,
.final = crypto_sha1_final,
.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,
},
{
.base.cra_name = "hmac(sha1)",
@@ -173,10 +210,12 @@ static struct shash_alg algs[] = {
.update = crypto_hmac_sha1_update,
.final = crypto_hmac_sha1_final,
.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,
},
};
--
2.50.1
Powered by blists - more mailing lists