Initial import of ncp library sources.

Reviewed by:	jdp, mdodd

1 files changed, 137 insertions, 0 deletions

diff --git a/lib/libncp/ncpl_crypt.c b/lib/libncp/ncpl_crypt.c
new file mode 100644
index 0000000..00ce9bf
--- /dev/null
+++ b/lib/libncp/ncpl_crypt.c
@@ -0,0 +1,137 @@
+/* 
+ *  Routines in this file based on the work of Volker Lendecke,
+ *  Adapted for ncplib by Boris Popov
+ *  Please note that ncpl_crypt.c file should be indentical to this one
+ *
+ * $FreeBSD$
+ */
+#include <sys/param.h>
+#include <sys/errno.h>
+#include <sys/malloc.h>
+#include <string.h>
+
+/*$*********************************************************
+   $*
+   $* This code has been taken from DDJ 11/93, from an 
+   $* article by Pawel Szczerbina.
+   $*
+   $* Password encryption routines follow.
+   $* Converted to C from Barry Nance's Pascal
+   $* prog published in the March -93 issue of Byte.
+   $*
+   $* Adapted to be useable for ncpfs by 
+   $* Volker Lendecke <lendecke@namu01.gwdg.de> in 
+   $* October 1995. 
+   $*
+   $********************************************************* */
+
+
+
+typedef unsigned char buf32[32];
+
+static unsigned char encrypttable[256] = {
+0x7, 0x8, 0x0, 0x8, 0x6, 0x4, 0xE, 0x4, 0x5, 0xC, 0x1, 0x7, 0xB, 0xF, 0xA, 0x8,
+0xF, 0x8, 0xC, 0xC, 0x9, 0x4, 0x1, 0xE, 0x4, 0x6, 0x2, 0x4, 0x0, 0xA, 0xB, 0x9,
+0x2, 0xF, 0xB, 0x1, 0xD, 0x2, 0x1, 0x9, 0x5, 0xE, 0x7, 0x0, 0x0, 0x2, 0x6, 0x6,
+0x0, 0x7, 0x3, 0x8, 0x2, 0x9, 0x3, 0xF, 0x7, 0xF, 0xC, 0xF, 0x6, 0x4, 0xA, 0x0,
+0x2, 0x3, 0xA, 0xB, 0xD, 0x8, 0x3, 0xA, 0x1, 0x7, 0xC, 0xF, 0x1, 0x8, 0x9, 0xD,
+0x9, 0x1, 0x9, 0x4, 0xE, 0x4, 0xC, 0x5, 0x5, 0xC, 0x8, 0xB, 0x2, 0x3, 0x9, 0xE,
+0x7, 0x7, 0x6, 0x9, 0xE, 0xF, 0xC, 0x8, 0xD, 0x1, 0xA, 0x6, 0xE, 0xD, 0x0, 0x7,
+0x7, 0xA, 0x0, 0x1, 0xF, 0x5, 0x4, 0xB, 0x7, 0xB, 0xE, 0xC, 0x9, 0x5, 0xD, 0x1,
+0xB, 0xD, 0x1, 0x3, 0x5, 0xD, 0xE, 0x6, 0x3, 0x0, 0xB, 0xB, 0xF, 0x3, 0x6, 0x4,
+0x9, 0xD, 0xA, 0x3, 0x1, 0x4, 0x9, 0x4, 0x8, 0x3, 0xB, 0xE, 0x5, 0x0, 0x5, 0x2,
+0xC, 0xB, 0xD, 0x5, 0xD, 0x5, 0xD, 0x2, 0xD, 0x9, 0xA, 0xC, 0xA, 0x0, 0xB, 0x3,
+0x5, 0x3, 0x6, 0x9, 0x5, 0x1, 0xE, 0xE, 0x0, 0xE, 0x8, 0x2, 0xD, 0x2, 0x2, 0x0,
+0x4, 0xF, 0x8, 0x5, 0x9, 0x6, 0x8, 0x6, 0xB, 0xA, 0xB, 0xF, 0x0, 0x7, 0x2, 0x8,
+0xC, 0x7, 0x3, 0xA, 0x1, 0x4, 0x2, 0x5, 0xF, 0x7, 0xA, 0xC, 0xE, 0x5, 0x9, 0x3,
+0xE, 0x7, 0x1, 0x2, 0xE, 0x1, 0xF, 0x4, 0xA, 0x6, 0xC, 0x6, 0xF, 0x4, 0x3, 0x0,
+0xC, 0x0, 0x3, 0x6, 0xF, 0x8, 0x7, 0xB, 0x2, 0xD, 0xC, 0x6, 0xA, 0xA, 0x8, 0xD
+};
+
+static buf32 encryptkeys = {
+    0x48, 0x93, 0x46, 0x67, 0x98, 0x3D, 0xE6, 0x8D,
+    0xB7, 0x10, 0x7A, 0x26, 0x5A, 0xB9, 0xB1, 0x35,
+    0x6B, 0x0F, 0xD5, 0x70, 0xAE, 0xFB, 0xAD, 0x11,
+    0xF4, 0x47, 0xDC, 0xA7, 0xEC, 0xCF, 0x50, 0xC0
+};
+
+/*
+ * Create table-based 16-bytes hash from a 32-bytes array
+ */
+static void
+nw_hash(buf32 temp, unsigned char *target) {
+	short sum;
+	unsigned char b3;
+	int s, b2, i;
+
+	sum = 0;
+
+	for (b2 = 0; b2 <= 1; ++b2) {
+		for (s = 0; s <= 31; ++s) {
+			b3 = (temp[s] + sum) ^ (temp[(s + sum) & 31] - encryptkeys[s]);
+			sum += b3;
+			temp[s] = b3;
+		}
+	}
+
+	for (i = 0; i <= 15; ++i) {
+		target[i] = encrypttable[temp[2 * i]]
+		    | (encrypttable[temp[2 * i + 1]] << 4);
+	}
+}
+
+
+/*
+ * Create a 16-bytes pattern from given buffer based on a four bytes key
+ */
+void
+nw_keyhash(const u_char *key, const u_char *buf, int buflen, u_char *target) {
+	int b2, d, s;
+	buf32 temp;
+
+	while (buflen > 0 && buf[buflen - 1] == 0)
+		buflen--;
+
+	bzero(temp, sizeof(temp));
+
+	d = 0;
+	while (buflen >= 32) {
+		for (s = 0; s <= 31; ++s)
+			temp[s] ^= buf[d++];
+		buflen -= 32;
+	}
+	b2 = d;
+	if (buflen > 0)	{
+		for (s = 0; s <= 31; ++s) {
+			if (d + buflen == b2) {
+				temp[s] ^= encryptkeys[s];
+				b2 = d;
+			} else
+				temp[s] ^= buf[b2++];
+		}
+	}
+	for (s = 0; s <= 31; ++s)
+		temp[s] ^= key[s & 3];
+
+	nw_hash(temp, target);
+}
+
+/*
+ * Create an 8-bytes pattern from an 8-bytes key and 16-bytes of data
+ */
+void
+nw_encrypt(const u_char *fra, const u_char *buf, u_char *target) {
+	buf32 k;
+	int s;
+
+	nw_keyhash(fra, buf, 16, k);
+	nw_keyhash(fra + 4, buf, 16, k + 16);
+
+	for (s = 0; s < 16; s++)
+		k[s] ^= k[31 - s];
+
+	for (s = 0; s < 8; s++)
+		*target++ = k[s] ^ k[15 - s];
+}
+
+