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
diff --git a/include/venti.h b/include/venti.h
index d6b753b..45c0aab 100644
--- a/include/venti.h
+++ b/include/venti.h
@@ -381,6 +381,10 @@
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.
*/
diff --git a/src/libventi/mkfile b/src/libventi/mkfile
index 289262a..3788185 100644
--- a/src/libventi/mkfile
+++ b/src/libventi/mkfile
@@ -24,6 +24,7 @@
scorefmt.$O\
send.$O\
server.$O\
+ sha1.$O\
srvhello.$O\
strdup.$O\
string.$O\
diff --git a/src/libventi/sha1.c b/src/libventi/sha1.c
new file mode 100644
index 0000000..358f923
--- /dev/null
+++ b/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;
+}
