crypto: lib/sha256 - return void

The SHA-256 / SHA-224 library functions can't fail, so remove the
useless return value.

Also long as the declarations are being changed anyway, also fix some
parameter names in the declarations to match the definitions.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/crypto/sha256_generic.c b/crypto/sha256_generic.c
index f2d7095d4f2d6486b65aa36ed4628d2f49ee7207..88156e3e2a33e0c24611a55b6a196c4c2de2b5ca 100644 (file)
--- a/crypto/sha256_generic.c
+++ b/crypto/sha256_generic.c
@@ -35,27 +35,31 @@ EXPORT_SYMBOL_GPL(sha256_zero_message_hash);
 
 static int crypto_sha256_init(struct shash_desc *desc)
 {
-       return sha256_init(shash_desc_ctx(desc));
+       sha256_init(shash_desc_ctx(desc));
+       return 0;
 }
 
 static int crypto_sha224_init(struct shash_desc *desc)
 {
-       return sha224_init(shash_desc_ctx(desc));
+       sha224_init(shash_desc_ctx(desc));
+       return 0;
 }
 
 int crypto_sha256_update(struct shash_desc *desc, const u8 *data,
                          unsigned int len)
 {
-       return sha256_update(shash_desc_ctx(desc), data, len);
+       sha256_update(shash_desc_ctx(desc), data, len);
+       return 0;
 }
 EXPORT_SYMBOL(crypto_sha256_update);
 
 static int crypto_sha256_final(struct shash_desc *desc, u8 *out)
 {
        if (crypto_shash_digestsize(desc->tfm) == SHA224_DIGEST_SIZE)
-               return sha224_final(shash_desc_ctx(desc), out);
+               sha224_final(shash_desc_ctx(desc), out);
        else
-               return sha256_final(shash_desc_ctx(desc), out);
+               sha256_final(shash_desc_ctx(desc), out);
+       return 0;
 }
 
 int crypto_sha256_finup(struct shash_desc *desc, const u8 *data,

diff --git a/include/crypto/sha.h b/include/crypto/sha.h
index 5c2132c7190095bc941dbd2b335234d8d9e12f22..67aec7245cb75a6c25e28c0a5a7e2d1435e05a9c 100644 (file)
--- a/include/crypto/sha.h
+++ b/include/crypto/sha.h
@@ -123,7 +123,7 @@ extern int crypto_sha512_finup(struct shash_desc *desc, const u8 *data,
  * For details see lib/crypto/sha256.c
  */
 
-static inline int sha256_init(struct sha256_state *sctx)
+static inline void sha256_init(struct sha256_state *sctx)
 {
        sctx->state[0] = SHA256_H0;
        sctx->state[1] = SHA256_H1;
@@ -134,14 +134,11 @@ static inline int sha256_init(struct sha256_state *sctx)
        sctx->state[6] = SHA256_H6;
        sctx->state[7] = SHA256_H7;
        sctx->count = 0;
-
-       return 0;
 }
-extern int sha256_update(struct sha256_state *sctx, const u8 *input,
-                        unsigned int length);
-extern int sha256_final(struct sha256_state *sctx, u8 *hash);
+void sha256_update(struct sha256_state *sctx, const u8 *data, unsigned int len);
+void sha256_final(struct sha256_state *sctx, u8 *out);
 
-static inline int sha224_init(struct sha256_state *sctx)
+static inline void sha224_init(struct sha256_state *sctx)
 {
        sctx->state[0] = SHA224_H0;
        sctx->state[1] = SHA224_H1;
@@ -152,11 +149,8 @@ static inline int sha224_init(struct sha256_state *sctx)
        sctx->state[6] = SHA224_H6;
        sctx->state[7] = SHA224_H7;
        sctx->count = 0;
-
-       return 0;
 }
-extern int sha224_update(struct sha256_state *sctx, const u8 *input,
-                        unsigned int length);
-extern int sha224_final(struct sha256_state *sctx, u8 *hash);
+void sha224_update(struct sha256_state *sctx, const u8 *data, unsigned int len);
+void sha224_final(struct sha256_state *sctx, u8 *out);
 
 #endif

diff --git a/include/crypto/sha256_base.h b/include/crypto/sha256_base.h
index cea60cff80bd870f5c9153d07277e2d47919b413..6ded110783ae87dd97c40edc42b83ad0a08431f6 100644 (file)
--- a/include/crypto/sha256_base.h
+++ b/include/crypto/sha256_base.h
@@ -22,14 +22,16 @@ static inline int sha224_base_init(struct shash_desc *desc)
 {
        struct sha256_state *sctx = shash_desc_ctx(desc);
 
-       return sha224_init(sctx);
+       sha224_init(sctx);
+       return 0;
 }
 
 static inline int sha256_base_init(struct shash_desc *desc)
 {
        struct sha256_state *sctx = shash_desc_ctx(desc);
 
-       return sha256_init(sctx);
+       sha256_init(sctx);
+       return 0;
 }
 
 static inline int sha256_base_do_update(struct shash_desc *desc,

diff --git a/lib/crypto/sha256.c b/lib/crypto/sha256.c
index 66cb04b0cf4e7e57ad1b241c134c02ea99f454ca..2e621697c5c35c2769ce179e8d08da7aa987c1c5 100644 (file)
--- a/lib/crypto/sha256.c
+++ b/lib/crypto/sha256.c
@@ -206,7 +206,7 @@ static void sha256_transform(u32 *state, const u8 *input)
        memzero_explicit(W, 64 * sizeof(u32));
 }
 
-int 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)
 {
        unsigned int partial, done;
        const u8 *src;
@@ -232,18 +232,16 @@ int sha256_update(struct sha256_state *sctx, const u8 *data, unsigned int len)
                partial = 0;
        }
        memcpy(sctx->buf + partial, src, len - done);
-
-       return 0;
 }
 EXPORT_SYMBOL(sha256_update);
 
-int sha224_update(struct sha256_state *sctx, const u8 *data, unsigned int len)
+void sha224_update(struct sha256_state *sctx, const u8 *data, unsigned int len)
 {
-       return sha256_update(sctx, data, len);
+       sha256_update(sctx, data, len);
 }
 EXPORT_SYMBOL(sha224_update);
 
-static int __sha256_final(struct sha256_state *sctx, u8 *out, int digest_words)
+static void __sha256_final(struct sha256_state *sctx, u8 *out, int digest_words)
 {
        __be32 *dst = (__be32 *)out;
        __be64 bits;
@@ -268,19 +266,17 @@ static int __sha256_final(struct sha256_state *sctx, u8 *out, int digest_words)
 
        /* Zeroize sensitive information. */
        memset(sctx, 0, sizeof(*sctx));
-
-       return 0;
 }
 
-int sha256_final(struct sha256_state *sctx, u8 *out)
+void sha256_final(struct sha256_state *sctx, u8 *out)
 {
-       return __sha256_final(sctx, out, 8);
+       __sha256_final(sctx, out, 8);
 }
 EXPORT_SYMBOL(sha256_final);
 
-int sha224_final(struct sha256_state *sctx, u8 *out)
+void sha224_final(struct sha256_state *sctx, u8 *out)
 {
-       return __sha256_final(sctx, out, 7);
+       __sha256_final(sctx, out, 7);
 }
 EXPORT_SYMBOL(sha224_final);