$NetBSD: patch-bj,v 1.1.1.1 1999/10/08 04:34:43 dbj Exp $

--- pppd/extra_crypto.c	Wed Dec 31 16:00:00 1969
+++ pppd/extra_crypto.c	Thu Jun 24 16:05:42 1999
@@ -0,0 +1,162 @@
+/*
+ * Copyright (c) Tim Hockin, Cobalt Networks Inc. and others
+ *
+ * crypto routines used by multiple c files 
+ */
+#include <stdio.h>
+#include <ctype.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include "extra_crypto.h"
+#include "pppd.h"
+#include "md4.h"
+#ifndef USE_CRYPT
+#include <des.h>
+#endif
+
+/* quick wrapper for easy md4 */
+void
+md4(unsigned char *from, int from_len, unsigned char *to)
+{
+  MD4_CTX Context;
+
+#ifndef __NetBSD__
+  from_len <<= 3; /* bytes->bits */
+#endif
+
+  MD4Init(&Context);
+  MD4Update(&Context, from, from_len);
+  MD4Final(to, &Context);
+}
+
+
+/* Microsoft LANMAN Password hashing */
+static u_char *MSStdText = (u_char *)"KGS!@#$%"; /* key from rasapi32.dll */
+
+void
+LmPasswordHash(char *password, int len, char *hash)
+{
+    int	i;
+    u_char up_pass[MAX_NT_PASSWORD]; /* max is actually 14 */
+
+    /* LANMan password is case insensitive */
+    BZERO(up_pass, sizeof(up_pass));
+    for (i = 0; i < len; i++)
+       up_pass[i] = (u_char)toupper(up_pass[i]);
+    DesEncrypt(MSStdText, up_pass + 0, hash + 0);
+    DesEncrypt(MSStdText, up_pass + 7, hash + 8);
+}
+
+void
+NtPasswordHash(char *secret, int secret_len, unsigned char *hash)
+{
+    int	i;
+    u_char unicodePassword[MAX_NT_PASSWORD * 2];
+
+    /* Initialize the Unicode version of the secret (== password). */
+    /* This implicitly supports 8-bit ISO8859/1 characters. */
+    BZERO(unicodePassword, sizeof(unicodePassword));
+    for (i = 0; i < secret_len; i++)
+	unicodePassword[i * 2] = (u_char)secret[i];
+
+    /* Unicode is 2 bytes per char */
+    md4(unicodePassword, secret_len * 2, hash);
+}
+
+
+static u_char Get7Bits(unsigned char *input, int startBit)
+{
+    register unsigned int       word;
+
+    word  = (unsigned)input[startBit / 8] << 8;
+    word |= (unsigned)input[startBit / 8 + 1];
+
+    word >>= 15 - (startBit % 8 + 7);
+
+    return word & 0xFE;
+}
+
+
+static void MakeKey(unsigned char *key, unsigned char *des_key)
+{
+    des_key[0] = Get7Bits(key,  0);
+    des_key[1] = Get7Bits(key,  7);
+    des_key[2] = Get7Bits(key, 14);
+    des_key[3] = Get7Bits(key, 21);
+    des_key[4] = Get7Bits(key, 28);
+    des_key[5] = Get7Bits(key, 35);
+    des_key[6] = Get7Bits(key, 42);
+    des_key[7] = Get7Bits(key, 49);
+
+#ifndef USE_CRYPT
+    des_set_odd_parity((des_cblock *)des_key);
+#endif
+}
+
+
+#ifdef USE_CRYPT
+/* in == 8-byte string (expanded version of the 56-bit key)
+ * out == 64-byte string where each byte is either 1 or 0
+ * Note that the low-order "bit" is always ignored by by setkey()
+ */
+static void Expand(unsigned char *in, unsigned char *out)
+{
+        int j, c;
+        int i;
+
+        for(i = 0; i < 64; in++){
+		c = *in;
+                for(j = 7; j >= 0; j--)
+                        *out++ = (c >> j) & 01;
+                i += 8;
+        }
+}
+
+/* The inverse of Expand
+ */
+static void Collapse(unsigned char *in, unsigned char *out)
+{
+        int j;
+        int i;
+	unsigned int c;
+
+	for (i = 0; i < 64; i += 8, out++) {
+	    c = 0;
+	    for (j = 7; j >= 0; j--, in++)
+		c |= *in << j;
+	    *out = c & 0xff;
+	}
+}
+void
+DesEncrypt(unsigned char *clear, unsigned char *key, unsigned char *cipher)
+{
+    u_char des_key[8];
+    u_char crypt_key[66];
+    u_char des_input[66];
+
+    MakeKey(key, des_key);
+
+    Expand(des_key, crypt_key);
+    setkey(crypt_key);
+
+    Expand(clear, des_input);
+    encrypt(des_input, 0);
+    Collapse(des_input, cipher);
+}
+#else /* don't USE_CRYPT */
+void
+DesEncrypt(unsigned char *clear, unsigned char *key, unsigned char *cipher)
+{
+    des_cblock		des_key;
+    des_key_schedule	key_schedule;
+
+    MakeKey(key, des_key);
+
+    des_set_key(&des_key, key_schedule);
+
+    des_ecb_encrypt((des_cblock *)clear, (des_cblock *)cipher, key_schedule, 1);
+}
+#endif /* USE_CRYPT */
+
+