Support the latest HTTP Digest authentication specification (Issue #4862)

Also deprecates all httpMD5* functions.

- cgi-bin/var.c: Use cupsHashData to compute SID hash.
- cups/auth.c: Rewrite WWW-Authenticate parser to support multiple auth schemes
  and the new RFC 7616 version of HTTP Digest.
- cups/cups.h: Add cupsHashString function to get a hex version of a hash.
- cups/hash.c: Add MD5 support.
- cups/http.c: Track WWW-Authenticate in a long string, concatenate new set
  values.
- cups/http.h: Deprecate httpMD5* and recommend cupsDoAuth and cupsHash*.
- cups/http-private.h: Pull MD5 stuff, nonce_count is unsigned, track
  WWW-Authenticate header as a potentially long string.
- cups/http-support.c: Use cupsHashData to compute UUID hash.
- cups/md5.c: Comment everything out if we have an OS-supplied MD5 hash
  function.
- cups/md5passwd.c: Use cupsHash* functions.
- cups/tls-*.c: Use cupsHash* functions.
- cups/versioning.h: Add CUPS_API_2_3 definition.
- scheduler/client.c: Update WWW-Authenticate header to include AuthRef,
  Local, and PeerCred schemes with parameters as needed.

1 files changed, 1 insertions, 4 deletions

diff --git a/cups/http-support.c b/cups/http-support.c
index 76dbb7dbf..e2565392f 100644
--- a/cups/http-support.c
+++ b/cups/http-support.c
@@ -502,7 +502,6 @@ httpAssembleUUID(const char *server,	/* I - Server name */
 		 size_t     bufsize)	/* I - Size of buffer */
 {
   char			data[1024];	/* Source string for MD5 */
-  _cups_md5_state_t	md5state;	/* MD5 state */
   unsigned char		md5sum[16];	/* MD5 digest/sum */
 
 
@@ -517,9 +516,7 @@ httpAssembleUUID(const char *server,	/* I - Server name */
            port, name ? name : server, number,
 	   (unsigned)CUPS_RAND() & 0xffff, (unsigned)CUPS_RAND() & 0xffff);
 
-  _cupsMD5Init(&md5state);
-  _cupsMD5Append(&md5state, (unsigned char *)data, (int)strlen(data));
-  _cupsMD5Finish(&md5state, md5sum);
+  cupsHashData("md5", (unsigned char *)data, strlen(data), md5sum, sizeof(md5sum));
 
  /*
   * Generate the UUID from the MD5...