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crypto: lib/sha256 - add sha256() function

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Add a function sha256() which computes a SHA-256 digest in one step,
combining sha256_init() + sha256_update() + sha256_final().

This is similar to how we also have blake2s().

Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eric Biggers 2020-07-08 09:39:40 -07:00 committed by Herbert Xu
parent 6e8f972fc3
commit 9ea9c58b40
2 changed files with 11 additions and 0 deletions
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1
include/crypto/sha.h
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@ -147,6 +147,7 @@ static inline void sha256_init(struct sha256_state *sctx)
} }
void sha256_update(struct sha256_state *sctx, const u8 *data, unsigned int len); void sha256_update(struct sha256_state *sctx, const u8 *data, unsigned int len);
void sha256_final(struct sha256_state *sctx, u8 *out); void sha256_final(struct sha256_state *sctx, u8 *out);
void sha256(const u8 *data, unsigned int len, u8 *out);
static inline void sha224_init(struct sha256_state *sctx) static inline void sha224_init(struct sha256_state *sctx)
{ {

10
lib/crypto/sha256.c
View File

@ -280,4 +280,14 @@ void sha224_final(struct sha256_state *sctx, u8 *out)
} }
EXPORT_SYMBOL(sha224_final); EXPORT_SYMBOL(sha224_final);
void sha256(const u8 *data, unsigned int len, u8 *out)
{
struct sha256_state sctx;
sha256_init(&sctx);
sha256_update(&sctx, data, len);
sha256_final(&sctx, out);
}
EXPORT_SYMBOL(sha256);
MODULE_LICENSE("GPL"); MODULE_LICENSE("GPL");