-
/*
* md5.c -- md5 message digest algorithm
* taken from RFC-1321/Appendix A.3
- *
- * $Id$
*/
/*
#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.
+ * 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); \
- }
+ (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); \
- }
+ (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); \
- }
+ (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); \
- }
+ (a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
+ (a) = ROTATE_LEFT ((a), (s)); \
+ (a) += (b); \
+}
/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
-MD5_CTX *context; /* context */
+MD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
-*/
+ */
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
}
/* MD5 block update operation. Continues an MD5 message-digest
- operation, processing another message block, and updating the
- context.
+ * 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 */
+MD5_CTX *context; /* context */
+unsigned char *input; /* input block */
+unsigned int inputLen; /* length of input block */
{
unsigned int i, index, partLen;
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]++;
+ 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) {
- memcpy ((POINTER)&context->buffer[index], (POINTER)input, partLen);
- MD5Transform (context->state, context->buffer);
+ 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]);
+ 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 */
memcpy ((POINTER)&context->buffer[index], (POINTER)&input[i], inputLen-i);
* the message digest and zeroizing the context.
*/
void MD5Final (digest, context)
-unsigned char digest[16]; /* message digest */
-MD5_CTX *context; /* context */
+unsigned char digest[16]; /* message digest */
+MD5_CTX *context; /* context */
{
unsigned char bits[8];
unsigned int index, padLen;
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);
}
/* Encodes input (UINT4) into output (unsigned char). Assumes len is
- a multiple of 4.
+ * a multiple of 4.
*/
static void Encode (output, input, len)
unsigned char *output;
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);
+ 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.
+ * a multiple of 4.
*/
static void Decode (output, input, len)
UINT4 *output;
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);
+ output[i] = ((UINT4)input[j]) | (((UINT4)input[j+1]) << 8) |
+ (((UINT4)input[j+2]) << 16) | (((UINT4)input[j+3]) << 24);
}
-