X-Git-Url: https://git.ozlabs.org/?a=blobdiff_plain;f=pppd%2Fplugins%2Fradius%2Fradiusclient%2Flib%2Fmd5.c;fp=pppd%2Fplugins%2Fradius%2Fradiusclient%2Flib%2Fmd5.c;h=5dc7652028b37bc93151dc3c30da57b9942f9e02;hb=d95598c16f6a3feb4846db669601856bad15bb74;hp=0000000000000000000000000000000000000000;hpb=14768a012e45353cde5b60896ccc6b7528d90c69;p=ppp.git

diff --git a/pppd/plugins/radius/radiusclient/lib/md5.c b/pppd/plugins/radius/radiusclient/lib/md5.c
new file mode 100644
index 0000000..5dc7652
--- /dev/null
+++ b/pppd/plugins/radius/radiusclient/lib/md5.c
@@ -0,0 +1,348 @@
+/*
+ * $Id: md5.c,v 1.1 2002/01/22 16:03:02 dfs Exp $
+ */
+
+/* MD5C.C - RSA Data Security, Inc., MD5 message-digest algorithm
+ */
+
+/* Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
+rights reserved.
+
+License to copy and use this software is granted provided that it
+is identified as the "RSA Data Security, Inc. MD5 Message-Digest
+Algorithm" in all material mentioning or referencing this software
+or this function.
+
+License is also granted to make and use derivative works provided
+that such works are identified as "derived from the RSA Data
+Security, Inc. MD5 Message-Digest Algorithm" in all material
+mentioning or referencing the derived work.
+
+RSA Data Security, Inc. makes no representations concerning either
+the merchantability of this software or the suitability of this
+software for any particular purpose. It is provided "as is"
+without express or implied warranty of any kind.
+
+These notices must be retained in any copies of any part of this
+documentation and/or software.
+ */
+
+#include <string.h>
+
+#include <config.h>
+#include <includes.h>
+#include <radiusclient.h>
+
+typedef unsigned char		*POINTER;
+
+/* MD5 context. */
+typedef struct
+{
+	UINT4           state[4];  /* state (ABCD) */
+	UINT4           count[2];  /* number of bits, modulo 2^64 (lsb first) */
+	unsigned char   buffer[64]; /* input buffer */
+} MD5_CTX;
+
+static void MD5Init    (MD5_CTX *);
+static void MD5Update  (MD5_CTX *, unsigned char *, unsigned int);
+static void MD5Final   (unsigned char[16], MD5_CTX *);
+
+/* Constants for MD5Transform routine.
+ */
+#define S11 7
+#define S12 12
+#define S13 17
+#define S14 22
+#define S21 5
+#define S22 9
+#define S23 14
+#define S24 20
+#define S31 4
+#define S32 11
+#define S33 16
+#define S34 23
+#define S41 6
+#define S42 10
+#define S43 15
+#define S44 21
+
+static void MD5Transform (UINT4[4], unsigned char[64]);
+static void Encode (unsigned char *, UINT4 *, unsigned int);
+static void Decode (UINT4 *, unsigned char *, unsigned int);
+static void MD5_memcpy (POINTER, POINTER, unsigned int);
+static void MD5_memset (POINTER, int, unsigned int);
+
+static unsigned char PADDING[64] = {
+	0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+};
+
+/* F, G, H and I are basic MD5 functions.
+ */
+#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
+#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
+#define H(x, y, z) ((x) ^ (y) ^ (z))
+#define I(x, y, z) ((y) ^ ((x) | (~z)))
+
+/* ROTATE_LEFT rotates x left n bits.
+ */
+#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
+
+/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
+Rotation is separate from addition to prevent recomputation.
+ */
+#define FF(a, b, c, d, x, s, ac) { \
+ (a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
+ (a) = ROTATE_LEFT ((a), (s)); \
+ (a) += (b); \
+  }
+#define GG(a, b, c, d, x, s, ac) { \
+ (a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
+ (a) = ROTATE_LEFT ((a), (s)); \
+ (a) += (b); \
+  }
+#define HH(a, b, c, d, x, s, ac) { \
+ (a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
+ (a) = ROTATE_LEFT ((a), (s)); \
+ (a) += (b); \
+  }
+#define II(a, b, c, d, x, s, ac) { \
+ (a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
+ (a) = ROTATE_LEFT ((a), (s)); \
+ (a) += (b); \
+  }
+
+void rc_md5_calc (unsigned char *output, unsigned char *input, unsigned int inlen)
+{
+	MD5_CTX         context;
+
+	MD5Init (&context);
+	MD5Update (&context, input, inlen);
+	MD5Final (output, &context);
+}
+
+/* MD5 initialization. Begins an MD5 operation, writing a new context.
+ */
+static void MD5Init (MD5_CTX *context)
+{
+	context->count[0] = context->count[1] = 0;
+
+	/*
+	 * Load magic initialization constants.
+	 */
+	context->state[0] = 0x67452301;
+	context->state[1] = 0xefcdab89;
+	context->state[2] = 0x98badcfe;
+	context->state[3] = 0x10325476;
+}
+
+/* MD5 block update operation. Continues an MD5 message-digest
+  operation, processing another message block, and updating the
+  context.
+ */
+static void MD5Update (MD5_CTX *context, unsigned char *input, unsigned int inputLen)
+{
+	unsigned int    i,
+	                index,
+	                partLen;
+
+	/* Compute number of bytes mod 64 */
+	index = (unsigned int) ((context->count[0] >> 3) & 0x3F);
+
+	/* Update number of bits */
+	if ((context->count[0] += ((UINT4) inputLen << 3))
+			< ((UINT4) inputLen << 3))
+		context->count[1]++;
+	context->count[1] += ((UINT4) inputLen >> 29);
+
+	partLen = 64 - index;
+
+	/*
+	 * Transform as many times as possible.
+	 */
+	if (inputLen >= partLen)
+	{
+		MD5_memcpy
+			((POINTER) & context->buffer[index], (POINTER) input, partLen);
+		MD5Transform (context->state, context->buffer);
+
+		for (i = partLen; i + 63 < inputLen; i += 64)
+			MD5Transform (context->state, &input[i]);
+
+		index = 0;
+	}
+	else
+		i = 0;
+
+	/* Buffer remaining input */
+	MD5_memcpy
+		((POINTER) & context->buffer[index], (POINTER) & input[i],
+		 inputLen - i);
+}
+
+/* MD5 finalization. Ends an MD5 message-digest operation, writing the
+  the message digest and zeroizing the context.
+ */
+static void MD5Final (unsigned char *digest, MD5_CTX *context)
+{
+	unsigned char   bits[8];
+	unsigned int    index,
+	                padLen;
+
+	/* Save number of bits */
+	Encode (bits, context->count, 8);
+
+	/*
+	 * Pad out to 56 mod 64.
+	 */
+	index = (unsigned int) ((context->count[0] >> 3) & 0x3f);
+	padLen = (index < 56) ? (56 - index) : (120 - index);
+	MD5Update (context, PADDING, padLen);
+
+	/* Append length (before padding) */
+	MD5Update (context, bits, 8);
+
+	/* Store state in digest */
+	Encode (digest, context->state, 16);
+
+	/*
+	 * Zeroize sensitive information.
+	 */
+	MD5_memset ((POINTER) context, 0, sizeof (*context));
+}
+
+/* MD5 basic transformation. Transforms state based on block.
+ */
+static void MD5Transform (UINT4 *state, unsigned char *block)
+{
+	UINT4           a = state[0],
+	                b = state[1],
+	                c = state[2],
+	                d = state[3],
+	                x[16];
+
+	Decode (x, block, 64);
+
+	/* Round 1 */
+	FF (a, b, c, d, x[0], S11, 0xd76aa478);	/* 1 */
+	FF (d, a, b, c, x[1], S12, 0xe8c7b756);	/* 2 */
+	FF (c, d, a, b, x[2], S13, 0x242070db);	/* 3 */
+	FF (b, c, d, a, x[3], S14, 0xc1bdceee);	/* 4 */
+	FF (a, b, c, d, x[4], S11, 0xf57c0faf);	/* 5 */
+	FF (d, a, b, c, x[5], S12, 0x4787c62a);	/* 6 */
+	FF (c, d, a, b, x[6], S13, 0xa8304613);	/* 7 */
+	FF (b, c, d, a, x[7], S14, 0xfd469501);	/* 8 */
+	FF (a, b, c, d, x[8], S11, 0x698098d8);	/* 9 */
+	FF (d, a, b, c, x[9], S12, 0x8b44f7af);	/* 10 */
+	FF (c, d, a, b, x[10], S13, 0xffff5bb1);	/* 11 */
+	FF (b, c, d, a, x[11], S14, 0x895cd7be);	/* 12 */
+	FF (a, b, c, d, x[12], S11, 0x6b901122);	/* 13 */
+	FF (d, a, b, c, x[13], S12, 0xfd987193);	/* 14 */
+	FF (c, d, a, b, x[14], S13, 0xa679438e);	/* 15 */
+	FF (b, c, d, a, x[15], S14, 0x49b40821);	/* 16 */
+
+	/* Round 2 */
+	GG (a, b, c, d, x[1], S21, 0xf61e2562);	/* 17 */
+	GG (d, a, b, c, x[6], S22, 0xc040b340);	/* 18 */
+	GG (c, d, a, b, x[11], S23, 0x265e5a51);	/* 19 */
+	GG (b, c, d, a, x[0], S24, 0xe9b6c7aa);	/* 20 */
+	GG (a, b, c, d, x[5], S21, 0xd62f105d);	/* 21 */
+	GG (d, a, b, c, x[10], S22, 0x2441453);	/* 22 */
+	GG (c, d, a, b, x[15], S23, 0xd8a1e681);	/* 23 */
+	GG (b, c, d, a, x[4], S24, 0xe7d3fbc8);	/* 24 */
+	GG (a, b, c, d, x[9], S21, 0x21e1cde6);	/* 25 */
+	GG (d, a, b, c, x[14], S22, 0xc33707d6);	/* 26 */
+	GG (c, d, a, b, x[3], S23, 0xf4d50d87);	/* 27 */
+	GG (b, c, d, a, x[8], S24, 0x455a14ed);	/* 28 */
+	GG (a, b, c, d, x[13], S21, 0xa9e3e905);	/* 29 */
+	GG (d, a, b, c, x[2], S22, 0xfcefa3f8);	/* 30 */
+	GG (c, d, a, b, x[7], S23, 0x676f02d9);	/* 31 */
+	GG (b, c, d, a, x[12], S24, 0x8d2a4c8a);	/* 32 */
+
+	/* Round 3 */
+	HH (a, b, c, d, x[5], S31, 0xfffa3942);	/* 33 */
+	HH (d, a, b, c, x[8], S32, 0x8771f681);	/* 34 */
+	HH (c, d, a, b, x[11], S33, 0x6d9d6122);	/* 35 */
+	HH (b, c, d, a, x[14], S34, 0xfde5380c);	/* 36 */
+	HH (a, b, c, d, x[1], S31, 0xa4beea44);	/* 37 */
+	HH (d, a, b, c, x[4], S32, 0x4bdecfa9);	/* 38 */
+	HH (c, d, a, b, x[7], S33, 0xf6bb4b60);	/* 39 */
+	HH (b, c, d, a, x[10], S34, 0xbebfbc70);	/* 40 */
+	HH (a, b, c, d, x[13], S31, 0x289b7ec6);	/* 41 */
+	HH (d, a, b, c, x[0], S32, 0xeaa127fa);	/* 42 */
+	HH (c, d, a, b, x[3], S33, 0xd4ef3085);	/* 43 */
+	HH (b, c, d, a, x[6], S34, 0x4881d05);	/* 44 */
+	HH (a, b, c, d, x[9], S31, 0xd9d4d039);	/* 45 */
+	HH (d, a, b, c, x[12], S32, 0xe6db99e5);	/* 46 */
+	HH (c, d, a, b, x[15], S33, 0x1fa27cf8);	/* 47 */
+	HH (b, c, d, a, x[2], S34, 0xc4ac5665);	/* 48 */
+
+	/* Round 4 */
+	II (a, b, c, d, x[0], S41, 0xf4292244);	/* 49 */
+	II (d, a, b, c, x[7], S42, 0x432aff97);	/* 50 */
+	II (c, d, a, b, x[14], S43, 0xab9423a7);	/* 51 */
+	II (b, c, d, a, x[5], S44, 0xfc93a039);	/* 52 */
+	II (a, b, c, d, x[12], S41, 0x655b59c3);	/* 53 */
+	II (d, a, b, c, x[3], S42, 0x8f0ccc92);	/* 54 */
+	II (c, d, a, b, x[10], S43, 0xffeff47d);	/* 55 */
+	II (b, c, d, a, x[1], S44, 0x85845dd1);	/* 56 */
+	II (a, b, c, d, x[8], S41, 0x6fa87e4f);	/* 57 */
+	II (d, a, b, c, x[15], S42, 0xfe2ce6e0);	/* 58 */
+	II (c, d, a, b, x[6], S43, 0xa3014314);	/* 59 */
+	II (b, c, d, a, x[13], S44, 0x4e0811a1);	/* 60 */
+	II (a, b, c, d, x[4], S41, 0xf7537e82);	/* 61 */
+	II (d, a, b, c, x[11], S42, 0xbd3af235);	/* 62 */
+	II (c, d, a, b, x[2], S43, 0x2ad7d2bb);	/* 63 */
+	II (b, c, d, a, x[9], S44, 0xeb86d391);	/* 64 */
+
+	state[0] += a;
+	state[1] += b;
+	state[2] += c;
+	state[3] += d;
+
+	/*
+	 * Zeroize sensitive information.
+	 */
+	MD5_memset ((POINTER) x, 0, sizeof (x));
+}
+
+/* Encodes input (UINT4) into output (unsigned char). Assumes len is
+  a multiple of 4.
+ */
+static void Encode (unsigned char *output, UINT4 *input, unsigned int len)
+{
+	unsigned int    i,
+	                j;
+
+	for (i = 0, j = 0; j < len; i++, j += 4)
+	{
+		output[j] = (unsigned char) (input[i] & 0xff);
+		output[j + 1] = (unsigned char) ((input[i] >> 8) & 0xff);
+		output[j + 2] = (unsigned char) ((input[i] >> 16) & 0xff);
+		output[j + 3] = (unsigned char) ((input[i] >> 24) & 0xff);
+	}
+}
+
+/* Decodes input (unsigned char) into output (UINT4). Assumes len is
+  a multiple of 4.
+ */
+static void Decode (UINT4 *output, unsigned char *input, unsigned int len)
+{
+	unsigned int    i,
+	                j;
+
+	for (i = 0, j = 0; j < len; i++, j += 4)
+		output[i] = ((UINT4) input[j]) | (((UINT4) input[j + 1]) << 8) |
+			(((UINT4) input[j + 2]) << 16) | (((UINT4) input[j + 3]) << 24);
+}
+
+static void MD5_memcpy (POINTER output, POINTER input, unsigned int len)
+{
+	memcpy(output, input, len);
+}
+
+static void MD5_memset (POINTER output, int value, unsigned int len)
+{
+	memset(output, value, len);
+}