From b737103a9187e0191dbc1995da3399ab3dbcdc66 Mon Sep 17 00:00:00 2001
From: Guus Sliepen <guus@tinc-vpn.org>
Date: Sun, 4 Jan 2015 14:19:23 +0100
Subject: [PATCH] Use void pointers for opaque data blobs in the SHA512 code.

---
 src/ed25519/sha512.c | 12 +++++++-----
 src/ed25519/sha512.h |  8 ++++----
 2 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/src/ed25519/sha512.c b/src/ed25519/sha512.c
index afe98e5..e1db1e5 100644
--- a/src/ed25519/sha512.c
+++ b/src/ed25519/sha512.c
@@ -88,7 +88,7 @@ static const uint64_t K[80] = {
 #endif
 
 /* compress 1024-bits */
-static int sha512_compress(sha512_context *md, unsigned char *buf)
+static int sha512_compress(sha512_context *md, const unsigned char *buf)
 {
     uint64_t S[8], W[80], t0, t1;
     int i;
@@ -168,8 +168,9 @@ int sha512_init(sha512_context * md) {
    @param inlen  The length of the data (octets)
    @return 0 if successful
 */
-int sha512_update(sha512_context *md, const unsigned char *in, size_t inlen)
+int sha512_update(sha512_context *md, const void *vin, size_t inlen)
 {
+    const unsigned char *in = vin;
     size_t n;
     size_t i;
     int           err;
@@ -180,7 +181,7 @@ int sha512_update(sha512_context *md, const unsigned char *in, size_t inlen)
     }
     while (inlen > 0) {
         if (md->curlen == 0 && inlen >= 128) {
-           if ((err = sha512_compress (md, (unsigned char *)in)) != 0) {
+           if ((err = sha512_compress (md, in)) != 0) {
               return err;
            }
            md->length += 128 * 8;
@@ -215,9 +216,10 @@ int sha512_update(sha512_context *md, const unsigned char *in, size_t inlen)
    @param out [out] The destination of the hash (64 bytes)
    @return 0 if successful
 */
-int sha512_final(sha512_context * md, unsigned char *out)
+int sha512_final(sha512_context * md, void *vout)
 {
     int i;
+    unsigned char *out = vout;
 
     if (md == NULL) return 1;
     if (out == NULL) return 1;
@@ -264,7 +266,7 @@ int sha512_final(sha512_context * md, unsigned char *out)
    return 0;
 }
 
-int sha512(const unsigned char *message, size_t message_len, unsigned char *out)
+int sha512(const void *message, size_t message_len, void *out)
 {
     sha512_context ctx;
     int ret;
diff --git a/src/ed25519/sha512.h b/src/ed25519/sha512.h
index e56b00e..e23f8db 100644
--- a/src/ed25519/sha512.h
+++ b/src/ed25519/sha512.h
@@ -14,8 +14,8 @@ typedef struct sha512_context_ {
 
 
 int sha512_init(sha512_context * md);
-int sha512_final(sha512_context * md, unsigned char *out);
-int sha512_update(sha512_context * md, const unsigned char *in, size_t inlen);
-int sha512(const unsigned char *message, size_t message_len, unsigned char *out);
+int sha512_final(sha512_context * md, void *out);
+int sha512_update(sha512_context * md, const void *in, size_t inlen);
+int sha512(const void *message, size_t message_len, void *out);
 
-#endif
\ No newline at end of file
+#endif
-- 
2.25.1