X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/3aa4eda8b1e0c4abc04439affe850d33648c7472..91b978f4a8d79faa7c00ffa2147e874c8b7e7f3b:/md5.c

diff --git a/md5.c b/md5.c
index e0691c8..510cb6a 100644
--- a/md5.c
+++ b/md5.c
@@ -1,6 +1,8 @@
 /* MD5C.C - RSA Data Security, Inc., MD5 message-digest algorithm
  */
 
+char const *cvs_id_md5 = "$Id: md5.c,v 1.3 2004/08/13 00:02:50 fred_nerk Exp $";
+
 /* Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
 rights reserved.
 
@@ -23,6 +25,7 @@ These notices must be retained in any copies of any part of this
 documentation and/or software.
  */
 
+#include <string.h>
 #include "md5.h"
 
 /* Constants for MD5Transform routine.
@@ -48,13 +51,11 @@ documentation and/or software.
 static void MD5Transform PROTO_LIST((UINT4[4], unsigned char[64]));
 static void Encode PROTO_LIST((unsigned char *, UINT4 *, unsigned int));
 static void Decode PROTO_LIST((UINT4 *, unsigned char *, unsigned int));
-static void MD5_memcpy PROTO_LIST((POINTER, POINTER, unsigned int));
-static void MD5_memset PROTO_LIST((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
+	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.
@@ -94,256 +95,202 @@ Rotation is separate from addition to prevent recomputation.
 
 /* MD5 initialization. Begins an MD5 operation, writing a new context.
  */
-void
-MD5Init(context)
-     MD5_CTX *context;          /* context */
+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;
+	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.
  */
-void
-MD5Update(context, input, inputLen)
-     MD5_CTX *context;          /* context */
-     unsigned char *input;      /* input block */
-     unsigned int inputLen;     /* length of input block */
+void MD5Update(MD5_CTX *context, unsigned char *input, unsigned int inputLen)
+
 {
-   unsigned int i,
-            index,
-            partLen;
+	unsigned int i,
+	index,
+	partLen;
 
-   /* Compute number of bytes mod 64 */
-   index = (unsigned int) ((context->count[0] >> 3) & 0x3F);
+	/* 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);
+	/* 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;
+	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);
+	/* Transform as many times as possible.
+	 */
+	if (inputLen >= partLen)
+	{
+		memcpy(&context->buffer[index], input, partLen);
+		MD5Transform(context->state, context->buffer);
 
-        for (i = partLen; i + 63 < inputLen; i += 64)
-           MD5Transform(context->state, &input[i]);
+		for (i = partLen; i + 63 < inputLen; i += 64)
+			MD5Transform(context->state, &input[i]);
 
-        index = 0;
-     }
-   else
-      i = 0;
+		index = 0;
+	}
+	else
+		i = 0;
 
-   /* Buffer remaining input */
-   MD5_memcpy((POINTER) & context->buffer[index], (POINTER) & input[i], inputLen - i);
+	/* Buffer remaining input */
+	memcpy(&context->buffer[index], &input[i], inputLen - i);
 }
 
 /* MD5 finalization. Ends an MD5 message-digest operation, writing the
   the message digest and zeroizing the context.
  */
-void
-MD5Final(digest, context)
-     unsigned char digest[16];  /* message digest */
-     MD5_CTX *context;          /* context */
+void MD5Final(unsigned char digest[16], MD5_CTX *context)
 {
-   unsigned char bits[8];
-   unsigned int index,
-            padLen;
+	unsigned char bits[8];
+	unsigned int index, padLen;
 
-   /* Save number of bits */
-   Encode(bits, context->count, 8);
+	/* 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);
+	/* 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);
+	/* Append length (before padding) */
+	MD5Update(context, bits, 8);
 
-   /* Store state in digest */
-   Encode(digest, context->state, 16);
+	/* Store state in digest */
+	Encode(digest, context->state, 16);
 
-   /* Zeroize sensitive information.
-    */
-   MD5_memset((POINTER) context, 0, sizeof(*context));
+	/* Zeroize sensitive information.
+	 */
+	memset(context, 0, sizeof(*context));
 }
 
 /* MD5 basic transformation. Transforms state based on block.
  */
-static void
-MD5Transform(state, block)
-     UINT4    state[4];
-     unsigned char block[64];
+static void MD5Transform(UINT4 state[4], unsigned char block[64])
 {
-   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));
+	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.
+	memset(x, 0, sizeof(x));
 }
 
 /* Encodes input (UINT4) into output (unsigned char). Assumes len is
   a multiple of 4.
  */
-static void
-Encode(output, input, len)
-     unsigned char *output;
-     UINT4   *input;
-     unsigned int len;
+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);
-     }
+	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(output, input, len)
-     UINT4   *output;
-     unsigned char *input;
-     unsigned int len;
+static void Decode(UINT4 *output, unsigned char *input, unsigned int len)
 {
-   unsigned int i,
-            j;
+	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);
+	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);
 }
 
-/* Note: Replace "for loop" with standard memcpy if possible.
- */
-
-static void
-MD5_memcpy(output, input, len)
-     POINTER  output;
-     POINTER  input;
-     unsigned int len;
-{
-   unsigned int i;
-
-   for (i = 0; i < len; i++)
-
-      output[i] = input[i];
-}
-
-/* Note: Replace "for loop" with standard memset if possible.
- */
-static void
-MD5_memset(output, value, len)
-     POINTER  output;
-     int      value;
-     unsigned int len;
-{
-   unsigned int i;
-
-   for (i = 0; i < len; i++)
-      ((char *) output)[i] = (char) value;
-}