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authorHans de Goede <hdegoede@redhat.com>2019-08-17 16:24:34 +0200
committerHerbert Xu <herbert@gondor.apana.org.au>2019-08-22 14:57:35 +1000
commit7d2f5b0c43e0bb346fbf78daefd68cd0bfc56ca3 (patch)
treedb6ed9503ddf35105c4c9aa87d7d6232bf788900 /lib
parent01d3aee86625bd798a5e69afb92517d5530c7ed1 (diff)
crypto: sha256 - Add sha224 support to sha256 library code
Add sha224 support to the lib/crypto/sha256 library code. This will allow us to replace both the sha256 and sha224 parts of crypto/sha256_generic.c when we remove the code duplication in further patches in this series. Suggested-by: Eric Biggers <ebiggers@kernel.org> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'lib')
-rw-r--r--lib/crypto/sha256.c37
1 files changed, 35 insertions, 2 deletions
diff --git a/lib/crypto/sha256.c b/lib/crypto/sha256.c
index f2ed75ae6910..45ad87520769 100644
--- a/lib/crypto/sha256.c
+++ b/lib/crypto/sha256.c
@@ -221,6 +221,22 @@ int sha256_init(struct sha256_state *sctx)
}
EXPORT_SYMBOL(sha256_init);
+int sha224_init(struct sha256_state *sctx)
+{
+ sctx->state[0] = SHA224_H0;
+ sctx->state[1] = SHA224_H1;
+ sctx->state[2] = SHA224_H2;
+ sctx->state[3] = SHA224_H3;
+ sctx->state[4] = SHA224_H4;
+ sctx->state[5] = SHA224_H5;
+ sctx->state[6] = SHA224_H6;
+ sctx->state[7] = SHA224_H7;
+ sctx->count = 0;
+
+ return 0;
+}
+EXPORT_SYMBOL(sha224_init);
+
int sha256_update(struct sha256_state *sctx, const u8 *data, unsigned int len)
{
unsigned int partial, done;
@@ -252,7 +268,13 @@ int sha256_update(struct sha256_state *sctx, const u8 *data, unsigned int len)
}
EXPORT_SYMBOL(sha256_update);
-int sha256_final(struct sha256_state *sctx, u8 *out)
+int sha224_update(struct sha256_state *sctx, const u8 *data, unsigned int len)
+{
+ return sha256_update(sctx, data, len);
+}
+EXPORT_SYMBOL(sha224_update);
+
+static int __sha256_final(struct sha256_state *sctx, u8 *out, int digest_words)
{
__be32 *dst = (__be32 *)out;
__be64 bits;
@@ -272,7 +294,7 @@ int sha256_final(struct sha256_state *sctx, u8 *out)
sha256_update(sctx, (const u8 *)&bits, sizeof(bits));
/* Store state in digest */
- for (i = 0; i < 8; i++)
+ for (i = 0; i < digest_words; i++)
put_unaligned_be32(sctx->state[i], &dst[i]);
/* Zeroize sensitive information. */
@@ -280,4 +302,15 @@ int sha256_final(struct sha256_state *sctx, u8 *out)
return 0;
}
+
+int sha256_final(struct sha256_state *sctx, u8 *out)
+{
+ return __sha256_final(sctx, out, 8);
+}
EXPORT_SYMBOL(sha256_final);
+
+int sha224_final(struct sha256_state *sctx, u8 *out)
+{
+ return __sha256_final(sctx, out, 7);
+}
+EXPORT_SYMBOL(sha224_final);