commit 83b247a771a514792b972216e1ad32ae1f3fc316
from: David du Colombier <0intro@gmail.com>
date: Sat Jan 21 09:01:20 2012 UTC

libventi: add functions vtsha1 and vtsha1check

These functions are equivalent to vtSha1 and vtSha1Check
from the old libventi and are particularly used by Fossil.

R=rsc
http://codereview.appspot.com/5555064

commit - f4792e43aef14341bb40f32e8583bd4731e1dcb4
commit + 83b247a771a514792b972216e1ad32ae1f3fc316
blob - d6b753b82e255d4b53d72c2c3702de0c4872e39b
blob + 45c0aab8287efabf9472fb92cbe1e278c364bab8
--- include/venti.h
+++ include/venti.h
@@ -380,6 +380,10 @@ Packet*	vtreadpacket(VtConn*, uchar score[VtScoreSize]
 int	vtwritepacket(VtConn*, uchar score[VtScoreSize], uint type, Packet *p);
 int	vtsync(VtConn*);
 int	vtping(VtConn*);
+
+/* sha1 */
+void	vtsha1(uchar score[VtScoreSize], uchar*, int);
+int	vtsha1check(uchar score[VtScoreSize], uchar*, int);
 
 /*
  * Data blocks and block cache.
blob - 289262ac3283ec0e4fce18840640d66b4bb64a74
blob + 3788185527d5c38a71f63ee7cea10a89e4760689
--- src/libventi/mkfile
+++ src/libventi/mkfile
@@ -24,6 +24,7 @@ OFILES=\
 	scorefmt.$O\
 	send.$O\
 	server.$O\
+	sha1.$O\
 	srvhello.$O\
 	strdup.$O\
 	string.$O\
blob - /dev/null
blob + 358f923d1d6fde2aa480dd64f8a09b62b9ef3409 (mode 644)
--- /dev/null
+++ src/libventi/sha1.c
@@ -0,0 +1,28 @@
+#include <u.h>
+#include <libc.h>
+#include <venti.h>
+#include <libsec.h>
+
+void
+vtsha1(uchar score[VtScoreSize], uchar *p, int n)
+{
+	DigestState ds;
+
+	memset(&ds, 0, sizeof ds);
+	sha1(p, n, score, &ds);
+}
+
+int
+vtsha1check(uchar score[VtScoreSize], uchar *p, int n)
+{
+	DigestState ds;
+	uchar score2[VtScoreSize];
+
+	memset(&ds, 0, sizeof ds);
+	sha1(p, n, score2, &ds);
+	if(memcmp(score, score2, VtScoreSize) != 0) {
+		werrstr("vtsha1check failed");
+		return -1;
+	}
+	return 0;
+}