1 files changed, 29 insertions, 0 deletions
diff --git a/src/libauthsrv/opasstokey.c b/src/libauthsrv/opasstokey.c
new file mode 100644
index 00000000..d263d4b7
--- /dev/null
+++ b/src/libauthsrv/opasstokey.c
@@ -0,0 +1,29 @@
+#include <u.h>
+#include <libc.h>
+#include <authsrv.h>
+
+int
+opasstokey(char *key, char *p)
+{
+	uchar t[10];
+	int c, n;
+
+	n = strlen(p);
+	memset(t, ' ', sizeof t);
+	if(n < 5)
+		return 0;
+	if(n > 10)
+		n = 10;
+	strncpy((char*)t, p, n);
+	if(n >= 9){
+		c = p[8] & 0xf;
+		if(n == 10)
+			c += p[9] << 4;
+		for(n = 0; n < 8; n++)
+			if(c & (1 << n))
+				t[n] -= ' ';
+	}
+	for(n = 0; n < 7; n++)
+		key[n] = (t[n] >> n) + (t[n+1] << (8 - (n+1)));
+	return 1;
+}