md5 ot sha512 in in6

[Ted Unangst]

Convert another md5 to sha512.

Index: in6_ifattach.c
===================================================================
RCS file: /cvs/src/sys/netinet6/in6_ifattach.c,v
retrieving revision 1.77
diff -u -p -r1.77 in6_ifattach.c
--- in6_ifattach.c      20 Nov 2014 09:55:57 -0000      1.77
+++ in6_ifattach.c      3 Dec 2014 19:37:14 -0000
@@ -37,7 +37,7 @@
 #include <sys/kernel.h>
 #include <sys/syslog.h>
 
-#include <crypto/md5.h>
+#include <crypto/sha2.h>
 
 #include <net/if.h>
 #include <net/if_var.h>
@@ -80,15 +80,15 @@ int in6_ifattach_loopback(struct ifnet *
  * IEEE802/EUI64 address sources.
  * The goal here is to get an interface identifier that is
  * (1) random enough and (2) does not change across reboot.
- * We currently use MD5(hostname) for it.
+ * We currently use SHA512(hostname) for it.
  *
  * in6 - upper 64bits are preserved
  */
 int
 get_last_resort_ifid(struct ifnet *ifp, struct in6_addr *in6)
 {
-       MD5_CTX ctxt;
-       u_int8_t digest[16];
+       SHA2_CTX ctx;
+       u_int8_t digest[SHA512_DIGEST_LENGTH];
 
 #if 0
        /* we need at least several letters as seed for ifid */
@@ -97,10 +97,9 @@ get_last_resort_ifid(struct ifnet *ifp, 
 #endif
 
        /* generate 8 bytes of pseudo-random value. */
-       bzero(&ctxt, sizeof(ctxt));
-       MD5Init(&ctxt);
-       MD5Update(&ctxt, hostname, hostnamelen);
-       MD5Final(digest, &ctxt);
+       SHA512Init(&ctx);
+       SHA512Update(&ctx, hostname, hostnamelen);
+       SHA512Final(digest, &ctx);
 
        /* assumes sizeof(digest) > sizeof(ifid) */
        bcopy(digest, &in6->s6_addr[8], 8);
@@ -500,8 +499,8 @@ in6_nigroup(struct ifnet *ifp, const cha
 {
        const char *p;
        u_int8_t *q;
-       MD5_CTX ctxt;
-       u_int8_t digest[16];
+       SHA2_CTX ctx;
+       u_int8_t digest[SHA512_DIGEST_LENGTH];
        u_int8_t l;
        u_int8_t n[64]; /* a single label must not exceed 63 chars */
 
@@ -522,11 +521,10 @@ in6_nigroup(struct ifnet *ifp, const cha
        }
 
        /* generate 8 bytes of pseudo-random value. */
-       bzero(&ctxt, sizeof(ctxt));
-       MD5Init(&ctxt);
-       MD5Update(&ctxt, &l, sizeof(l));
-       MD5Update(&ctxt, n, l);
-       MD5Final(digest, &ctxt);
+       SHA512Init(&ctx);
+       SHA512Update(&ctx, &l, sizeof(l));
+       SHA512Update(&ctx, n, l);
+       SHA512Final(digest, &ctx);
 
        bzero(sa6, sizeof(*sa6));
        sa6->sin6_family = AF_INET6;