Back to index

nagios-plugins  1.4.16
Defines | Functions | Variables
md5.c File Reference
#include "md5.h"

Go to the source code of this file.

Defines

#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
#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)))
#define ROTATE_LEFT(x, n)   (((x) << (n)) | ((x) >> (32-(n))))
#define FF(a, b, c, d, x, s, ac)
#define GG(a, b, c, d, x, s, ac)
#define HH(a, b, c, d, x, s, ac)
#define II(a, b, c, d, x, s, ac)

Functions

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))
void md5_calc (unsigned char *output, unsigned char *input, unsigned int inlen)
void MD5Init (MD5_CTX *context)
void MD5Update (MD5_CTX *context, unsigned char *input, unsigned int inputLen)
void MD5Final (digest, MD5_CTX *context)
static void MD5Transform (state, block)
static void Encode (unsigned char *output, UINT4 *input, unsigned int len)
static void Decode (UINT4 *output, unsigned char *input, unsigned int len)
static void MD5_memcpy (POINTER output, POINTER input, unsigned int len)
static void MD5_memset (POINTER output, int value, unsigned int len)

Variables

static unsigned char PADDING [64]

Define Documentation

#define F (   x,
  y,
 
)    (((x) & (y)) | ((~x) & (z)))

Definition at line 63 of file md5.c.

#define FF (   a,
  b,
  c,
  d,
  x,
  s,
  ac 
)
Value:
{ \
 (a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
 (a) = ROTATE_LEFT ((a), (s)); \
 (a) += (b); \
  }

Definition at line 75 of file md5.c.

#define G (   x,
  y,
 
)    (((x) & (z)) | ((y) & (~z)))

Definition at line 64 of file md5.c.

#define GG (   a,
  b,
  c,
  d,
  x,
  s,
  ac 
)
Value:
{ \
 (a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
 (a) = ROTATE_LEFT ((a), (s)); \
 (a) += (b); \
  }

Definition at line 80 of file md5.c.

#define H (   x,
  y,
 
)    ((x) ^ (y) ^ (z))

Definition at line 65 of file md5.c.

#define HH (   a,
  b,
  c,
  d,
  x,
  s,
  ac 
)
Value:
{ \
 (a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
 (a) = ROTATE_LEFT ((a), (s)); \
 (a) += (b); \
  }

Definition at line 85 of file md5.c.

#define I (   x,
  y,
 
)    ((y) ^ ((x) | (~z)))

Definition at line 66 of file md5.c.

#define II (   a,
  b,
  c,
  d,
  x,
  s,
  ac 
)
Value:
{ \
 (a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
 (a) = ROTATE_LEFT ((a), (s)); \
 (a) += (b); \
  }

Definition at line 90 of file md5.c.

#define ROTATE_LEFT (   x,
 
)    (((x) << (n)) | ((x) >> (32-(n))))

Definition at line 70 of file md5.c.

#define S11   7

Definition at line 30 of file md5.c.

#define S12   12

Definition at line 31 of file md5.c.

#define S13   17

Definition at line 32 of file md5.c.

#define S14   22

Definition at line 33 of file md5.c.

#define S21   5

Definition at line 34 of file md5.c.

#define S22   9

Definition at line 35 of file md5.c.

#define S23   14

Definition at line 36 of file md5.c.

#define S24   20

Definition at line 37 of file md5.c.

#define S31   4

Definition at line 38 of file md5.c.

#define S32   11

Definition at line 39 of file md5.c.

#define S33   16

Definition at line 40 of file md5.c.

#define S34   23

Definition at line 41 of file md5.c.

#define S41   6

Definition at line 42 of file md5.c.

#define S42   10

Definition at line 43 of file md5.c.

#define S43   15

Definition at line 44 of file md5.c.

#define S44   21

Definition at line 45 of file md5.c.


Function Documentation

static void Decode ( UINT4 output,
unsigned char *  input,
unsigned int  len 
) [static]

Definition at line 308 of file md5.c.

{
  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);
}

Here is the caller graph for this function:

static void Encode ( unsigned char *  output,
UINT4 input,
unsigned int  len 
) [static]

Definition at line 290 of file md5.c.

{
  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);
  }
}

Here is the caller graph for this function:

void md5_calc ( unsigned char *  output,
unsigned char *  input,
unsigned int  inlen 
)

Definition at line 96 of file md5.c.

{
       MD5_CTX       context;

       MD5Init(&context);
       MD5Update(&context, input, inlen);
       MD5Final(output, &context);
}

Here is the call graph for this function:

Here is the caller graph for this function:

static void MD5_memcpy ( POINTER  output,
POINTER  input,
unsigned int  len 
) [static]

Definition at line 323 of file md5.c.

{
  unsigned int i;

  for (i = 0; i < len; i++)
 output[i] = input[i];
}

Here is the caller graph for this function:

static void MD5_memset ( POINTER  output,
int  value,
unsigned int  len 
) [static]

Definition at line 336 of file md5.c.

{
  unsigned int i;

  for (i = 0; i < len; i++)
 ((char *)output)[i] = (char)value;
}

Here is the caller graph for this function:

void MD5Final ( digest  ,
MD5_CTX context 
)

Definition at line 168 of file md5.c.

{
  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));
}

Here is the call graph for this function:

Here is the caller graph for this function:

void MD5Init ( MD5_CTX context)

Definition at line 110 of file md5.c.

{
  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;
}

Here is the caller graph for this function:

static void MD5Transform ( state  ,
block   
) [static]

Definition at line 197 of file md5.c.

{
  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));
}

Here is the call graph for this function:

Here is the caller graph for this function:

void MD5Update ( MD5_CTX context,
unsigned char *  input,
unsigned int  inputLen 
)

Definition at line 126 of file md5.c.

{
  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);
}

Here is the call graph for this function:

Here is the caller graph for this function:

static void MD5Transform PROTO_LIST ( (UINT4[4], unsigned char[64])  ) [static]
static void Encode PROTO_LIST ( (unsigned char *, UINT4 *, unsigned int)  ) [static]
static void Decode PROTO_LIST ( (UINT4 *, unsigned char *, unsigned int)  ) [static]
static void MD5_memcpy PROTO_LIST ( (POINTER, POINTER, unsigned int)  ) [static]
static void MD5_memset PROTO_LIST ( (POINTER, int, unsigned int)  ) [static]

Variable Documentation

unsigned char PADDING[64] [static]
Initial value:
 {
  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
}

Definition at line 55 of file md5.c.