crypto: lib/sha256 - improve function prototypes

Follow best practices by changing the length parameters to size_t and
explicitly specifying the length of the output digest arrays.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/include/crypto/sha2.h b/include/crypto/sha2.h
index 9a56286d736d1fd3df16e092f30616592930fcf4..9853cd2d1291bae99380832250ffc40fe3ec6291 100644 (file)
--- a/include/crypto/sha2.h
+++ b/include/crypto/sha2.h
@@ -100,9 +100,9 @@ static inline void sha256_init(struct sha256_state *sctx)
        sctx->state[7] = SHA256_H7;
        sctx->count = 0;
 }
-void sha256_update(struct sha256_state *sctx, const u8 *data, unsigned int len);
-void sha256_final(struct sha256_state *sctx, u8 *out);
-void sha256(const u8 *data, unsigned int len, u8 *out);
+void sha256_update(struct sha256_state *sctx, const u8 *data, size_t len);
+void sha256_final(struct sha256_state *sctx, u8 out[SHA256_DIGEST_SIZE]);
+void sha256(const u8 *data, size_t len, u8 out[SHA256_DIGEST_SIZE]);
 
 static inline void sha224_init(struct sha256_state *sctx)
 {
@@ -117,6 +117,6 @@ static inline void sha224_init(struct sha256_state *sctx)
        sctx->count = 0;
 }
 /* Simply use sha256_update as it is equivalent to sha224_update. */
-void sha224_final(struct sha256_state *sctx, u8 *out);
+void sha224_final(struct sha256_state *sctx, u8 out[SHA224_DIGEST_SIZE]);
 
 #endif /* _CRYPTO_SHA2_H */

diff --git a/lib/crypto/sha256.c b/lib/crypto/sha256.c
index 4b19cf977ef1b2784a082863aecde5abc88cac97..563f09c9f381558162dd1773810dae4a036915e3 100644 (file)
--- a/lib/crypto/sha256.c
+++ b/lib/crypto/sha256.c
@@ -70,7 +70,7 @@ static inline void __sha256_update(struct sha256_state *sctx, const u8 *data,
                memcpy(&sctx->buf[partial], data, len);
 }
 
-void sha256_update(struct sha256_state *sctx, const u8 *data, unsigned int len)
+void sha256_update(struct sha256_state *sctx, const u8 *data, size_t len)
 {
        __sha256_update(sctx, data, len, false);
 }
@@ -101,19 +101,19 @@ static inline void __sha256_final(struct sha256_state *sctx, u8 *out,
        memzero_explicit(sctx, sizeof(*sctx));
 }
 
-void sha256_final(struct sha256_state *sctx, u8 *out)
+void sha256_final(struct sha256_state *sctx, u8 out[SHA256_DIGEST_SIZE])
 {
        __sha256_final(sctx, out, SHA256_DIGEST_SIZE, false);
 }
 EXPORT_SYMBOL(sha256_final);
 
-void sha224_final(struct sha256_state *sctx, u8 *out)
+void sha224_final(struct sha256_state *sctx, u8 out[SHA224_DIGEST_SIZE])
 {
        __sha256_final(sctx, out, SHA224_DIGEST_SIZE, false);
 }
 EXPORT_SYMBOL(sha224_final);
 
-void sha256(const u8 *data, unsigned int len, u8 *out)
+void sha256(const u8 *data, size_t len, u8 out[SHA256_DIGEST_SIZE])
 {
        struct sha256_state sctx;