Document hash functions.

[openssl.git] / crypto / hmac / hmac.c

diff --git a/crypto/hmac/hmac.c b/crypto/hmac/hmac.c
index 5c349bbb56e47c23375aa2fb23acc139ff359645..23b7c98f8fa1f00d4acf34c10dfeccc237df7973 100644 (file)
--- a/crypto/hmac/hmac.c
+++ b/crypto/hmac/hmac.c
@@ -109,7 +109,7 @@ void HMAC_Init(HMAC_CTX *ctx, const void *key, int len,
        memcpy(&ctx->md_ctx,&ctx->i_ctx,sizeof(ctx->i_ctx));
        }
 
-void HMAC_Update(HMAC_CTX *ctx, unsigned char *data, int len)
+void HMAC_Update(HMAC_CTX *ctx, const unsigned char *data, int len)
        {
        EVP_DigestUpdate(&(ctx->md_ctx),data,len);
        }
@@ -134,7 +134,7 @@ void HMAC_cleanup(HMAC_CTX *ctx)
        }
 
 unsigned char *HMAC(const EVP_MD *evp_md, const void *key, int key_len,
-                   unsigned char *d, int n, unsigned char *md,
+                   const unsigned char *d, int n, unsigned char *md,
                    unsigned int *md_len)
        {
        HMAC_CTX c;