MD5 Class Reference

#include <md5.h>

Public Types
typedef unsigned int	size_type

Public Member Functions
	MD5 ()
	MD5 (const std::string &text)
void	update (const unsigned char *buf, size_type length)
void	update (const char *buf, size_type length)
MD5 &	finalize ()
std::string	hexdigest () const

Friends
std::ostream &	operator<< (std::ostream &, MD5 md5)

Detailed Description

Definition at line 53 of file md5.h.

Member Typedef Documentation

size_type

typedef unsigned int MD5::size_type

Definition at line 56 of file md5.h.

Constructor & Destructor Documentation

MD5() [1/2]

MD5::MD5

(

)

Definition at line 105 of file md5.cpp.

{
  init();
}

MD5() [2/2]

MD5::MD5

(

const std::string &

text

)

Definition at line 113 of file md5.cpp.

{
  init();
  update(text.c_str(), (unsigned int)(text.length()));
  finalize();
}

References finalize(), and update().

Member Function Documentation

finalize()

MD5 & MD5::finalize

(

)

Definition at line 301 of file md5.cpp.

{
  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
  };
 
  if (!finalized) {
    // Save number of bits
    unsigned char bits[8];
    encode(bits, count, 8);
 
    // pad out to 56 mod 64.
    size_type index = count[0] / 8 % 64;
    size_type padLen = (index < 56) ? (56 - index) : (120 - index);
    update(padding, padLen);
 
    // Append length (before padding)
    update(bits, 8);
 
    // Store state in digest
    encode(digest, state, 16);
 
    // Zeroize sensitive information.
    memset(buffer, 0, sizeof buffer);
    memset(count, 0, sizeof count);
 
    finalized=true;
  }
 
  return *this;
}

References update().

Referenced by MD5().

hexdigest()

std::string MD5::hexdigest

(

)

const

Definition at line 338 of file md5.cpp.

{
  if (!finalized)
    return "";
 
  char buf[33];
  for (int i=0; i<16; i++)
    sprintf(buf+i*2, "%02x", digest[i]);
  buf[32]=0;
 
  return std::string(buf);
}

update() [1/2]

void MD5::update	(	const char *	buf,
		size_type	length
	)

update() [2/2]

void MD5::update	(	const unsigned char *	buf,
		size_type	length
	)

Referenced by finalize(), and MD5().

Friends And Related Symbol Documentation

operator<<

std::ostream & operator<< ( std::ostream &  out, MD5  md5  )

friend

Definition at line 353 of file md5.cpp.

{
  return out << md5.hexdigest();
}

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The documentation for this class was generated from the following files:

• md5.h
• md5.cpp