md5.h File Reference

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Classes
struct	MD5_CTX
Functions
void	MD5Init (MD5_CTX *context)
void	MD5Update (MD5_CTX *context, unsigned char *input, unsigned int inputLen)
void	MD5Final (unsigned char digest[16], MD5_CTX *context)

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Function Documentation

void MD5Final	(	unsigned char	digest[16],
		MD5_CTX *	context
	)

Definition at line 162 of file md5c.cpp.

References MD5_CTX::count, Encode(), MD5_memset(), MD5Update(), and PADDING.

Referenced by TAO_AV_RTCP::alloc_srcid().

{
  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));
}

void MD5Init

(

MD5_CTX *

context

)

Definition at line 107 of file md5c.cpp.

References MD5_CTX::count, and MD5_CTX::state.

Referenced by TAO_AV_RTCP::alloc_srcid().

{
  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;
}

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

Definition at line 122 of file md5c.cpp.

References MD5_CTX::buffer, MD5_CTX::count, MD5_memcpy(), MD5Transform(), and MD5_CTX::state.

Referenced by TAO_AV_RTCP::alloc_srcid(), and MD5Final().

{
  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);
}

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