sha256: C++ fix: void *conversion.

* chksums/sha256.c (SHA256_update): Change in parameter to
const unsigned char *, avoiding the need for a local
variable in that type.

* chksums/sha256.h (SHA256_update): Declaration updated.

2 files changed, 2 insertions, 3 deletions

diff --git a/chksums/sha256.c b/chksums/sha256.c
index 7c0cff73..a7d0e9d4 100644
--- a/chksums/sha256.c
+++ b/chksums/sha256.c
@@ -263,11 +263,10 @@ void SHA256_init(SHA256_t *ctx)
 }
 
 /* Add bytes into the hash */
-void SHA256_update(SHA256_t *ctx, const void *in, size_t len)
+void SHA256_update(SHA256_t *ctx, const unsigned char *src, size_t len)
 {
   u64_t bitlen;
   u32_t r;
-  const unsigned char *src = in;
 
   /* Number of bytes left in the buffer from previous updates */
   r = (ctx->count >> 3) & 0x3f;
diff --git a/chksums/sha256.h b/chksums/sha256.h
index 3cd57a4e..bdfcaa44 100644
--- a/chksums/sha256.h
+++ b/chksums/sha256.h
@@ -36,5 +36,5 @@ typedef struct SHA256 {
 } SHA256_t;
 
 void SHA256_init(SHA256_t *);
-void SHA256_update(SHA256_t *, const void *, size_t);
+void SHA256_update(SHA256_t *, const unsigned char *, size_t);
 void SHA256_final(SHA256_t *, unsigned char *);