commit - 648bb6f75a801e6d605fcd061f0b14fecc07a8be
commit + 641405320f4601f50e0d728805e14fb6f8196710
blob - /dev/null
blob + 0524c94227f75cd65aea786ab7074d52f7eedcb0 (mode 755)
--- /dev/null
+++ src/lib9/crypt.c
+/*
+ * Data Encryption Standard
+ * D.P.Mitchell 83/06/08.
+ *
+ * block_cipher(key, block, decrypting)
+ *
+ * these routines use the non-standard 7 byte format
+ * for DES keys.
+ */
+#include <u.h>
+#include <libc.h>
+#include <auth.h>
+#include <libsec.h>
+
+/*
+ * destructively encrypt the buffer, which
+ * must be at least 8 characters long.
+ */
+int
+encrypt(void *key, void *vbuf, int n)
+{
+ ulong ekey[32];
+ uchar *buf;
+ int i, r;
+
+ if(n < 8)
+ return 0;
+ key_setup(key, ekey);
+ buf = vbuf;
+ n--;
+ r = n % 7;
+ n /= 7;
+ for(i = 0; i < n; i++){
+ block_cipher(ekey, buf, 0);
+ buf += 7;
+ }
+ if(r)
+ block_cipher(ekey, buf - 7 + r, 0);
+ return 1;
+}
+
+/*
+ * destructively decrypt the buffer, which
+ * must be at least 8 characters long.
+ */
+int
+decrypt(void *key, void *vbuf, int n)
+{
+ ulong ekey[128];
+ uchar *buf;
+ int i, r;
+
+ if(n < 8)
+ return 0;
+ key_setup(key, ekey);
+ buf = vbuf;
+ n--;
+ r = n % 7;
+ n /= 7;
+ buf += n * 7;
+ if(r)
+ block_cipher(ekey, buf - 7 + r, 1);
+ for(i = 0; i < n; i++){
+ buf -= 7;
+ block_cipher(ekey, buf, 1);
+ }
+ return 1;
+}
blob - 361ab5b78241bacc7a0fc90030963d8c4b694dba
blob + 3ed220ab4d53b063b1defe27b6ea4f8a1a2ac883
--- src/lib9/mkfile
+++ src/lib9/mkfile
convM2S.$O\
convS2M.$O\
create.$O\
+ crypt.$O\
ctime.$O\
date.$O\
dial.$O\