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@xxxxxxxxxx>
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
include/crypto/sha256.h | 5 +++++
lib/crypto/sha256.c | 37 +++++++++++++++++++++++++++++++++++--
2 files changed, 40 insertions(+), 2 deletions(-)
diff --git a/include/crypto/sha256.h b/include/crypto/sha256.h
index 9cbb3589b8b3..a75998d65a41 100644
--- a/include/crypto/sha256.h
+++ b/include/crypto/sha256.h
@@ -26,4 +26,9 @@ extern int sha256_update(struct sha256_state *sctx, const u8 *input,
unsigned int length);
extern int sha256_final(struct sha256_state *sctx, u8 *hash);
+extern int sha224_init(struct sha256_state *sctx);
+extern int sha224_update(struct sha256_state *sctx, const u8 *input,
+ unsigned int length);
+extern int sha224_final(struct sha256_state *sctx, u8 *hash);
+
#endif /* SHA256_H */
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);
--
2.23.0.rc2
