[thirdparty/cups.git] / cups / md5passwd.c

/*
 * "$Id$"
 *
 *   MD5 password support for CUPS.
 *
 *   Copyright 2007-2010 by Apple Inc.
 *   Copyright 1997-2005 by Easy Software Products.
 *
 *   These coded instructions, statements, and computer programs are the
 *   property of Apple Inc. and are protected by Federal copyright
 *   law.  Distribution and use rights are outlined in the file "LICENSE.txt"
 *   which should have been included with this file.  If this file is
 *   file is missing or damaged, see the license at "http://www.cups.org/".
 *
 *   This file is subject to the Apple OS-Developed Software exception.
 *
 * Contents:
 *
 *   httpMD5()       - Compute the MD5 sum of the username:group:password.
 *   httpMD5Nonce()  - Combine the MD5 sum of the username, group, and password
 *                     with the server-supplied nonce value.
 *   httpMD5String() - Convert an MD5 sum to a character string.
 */

/*
 * Include necessary headers...
 */

#include "http-private.h"
#include "string-private.h"


/*
 * 'httpMD5()' - Compute the MD5 sum of the username:group:password.
 */

char *					/* O - MD5 sum */
httpMD5(const char *username,		/* I - User name */
        const char *realm,		/* I - Realm name */
        const char *passwd,		/* I - Password string */
	char       md5[33])		/* O - MD5 string */
{
  _cups_md5_state_t	state;		/* MD5 state info */
  unsigned char		sum[16];	/* Sum data */
  char			line[256];	/* Line to sum */


 /*
  * Compute the MD5 sum of the user name, group name, and password.
  */

  snprintf(line, sizeof(line), "%s:%s:%s", username, realm, passwd);
  _cupsMD5Init(&state);
  _cupsMD5Append(&state, (unsigned char *)line, (int)strlen(line));
  _cupsMD5Finish(&state, sum);

 /*
  * Return the sum...
  */

  return (httpMD5String(sum, md5));
}


/*
 * 'httpMD5Final()' - Combine the MD5 sum of the username, group, and password
 *                    with the server-supplied nonce value, method, and
 *                    request-uri.
 */

char *					/* O - New sum */
httpMD5Final(const char *nonce,		/* I - Server nonce value */
             const char *method,	/* I - METHOD (GET, POST, etc.) */
	     const char *resource,	/* I - Resource path */
             char       md5[33])	/* IO - MD5 sum */
{
  _cups_md5_state_t	state;		/* MD5 state info */
  unsigned char		sum[16];	/* Sum data */
  char			line[1024];	/* Line of data */
  char			a2[33];		/* Hash of method and resource */


 /*
  * First compute the MD5 sum of the method and resource...
  */

  snprintf(line, sizeof(line), "%s:%s", method, resource);
  _cupsMD5Init(&state);
  _cupsMD5Append(&state, (unsigned char *)line, (int)strlen(line));
  _cupsMD5Finish(&state, sum);
  httpMD5String(sum, a2);

 /*
  * Then combine A1 (MD5 of username, realm, and password) with the nonce
  * and A2 (method + resource) values to get the final MD5 sum for the
  * request...
  */

  snprintf(line, sizeof(line), "%s:%s:%s", md5, nonce, a2);

  _cupsMD5Init(&state);
  _cupsMD5Append(&state, (unsigned char *)line, (int)strlen(line));
  _cupsMD5Finish(&state, sum);

  return (httpMD5String(sum, md5));
}


/*
 * 'httpMD5String()' - Convert an MD5 sum to a character string.
 */

char *					/* O - MD5 sum in hex */
httpMD5String(const unsigned char *sum,	/* I - MD5 sum data */
              char                md5[33])
					/* O - MD5 sum in hex */
{
  int		i;			/* Looping var */
  char		*md5ptr;		/* Pointer into MD5 string */
  static const char hex[] = "0123456789abcdef";
					/* Hex digits */


 /*
  * Convert the MD5 sum to hexadecimal...
  */

  for (i = 16, md5ptr = md5; i > 0; i --, sum ++)
  {
    *md5ptr++ = hex[*sum >> 4];
    *md5ptr++ = hex[*sum & 15];
  }

  *md5ptr = '\0';

  return (md5);
}


/*
 * End of "$Id$".
 */
Commit	Line	Data
ef416fc2	1	/*
f2d18633	2	* "$Id$"
ef416fc2	3	*
71e16022	4	* MD5 password support for CUPS.
ef416fc2	5	*
71e16022	6	* Copyright 2007-2010 by Apple Inc.
ef416fc2	7	* Copyright 1997-2005 by Easy Software Products.
	8	*
	9	* These coded instructions, statements, and computer programs are the
bc44d920	10	* property of Apple Inc. and are protected by Federal copyright
	11	* law. Distribution and use rights are outlined in the file "LICENSE.txt"
	12	* which should have been included with this file. If this file is
	13	* file is missing or damaged, see the license at "http://www.cups.org/".
ef416fc2	14	*
	15	* This file is subject to the Apple OS-Developed Software exception.
	16	*
	17	* Contents:
	18	*
	19	* httpMD5() - Compute the MD5 sum of the username:group:password.
	20	* httpMD5Nonce() - Combine the MD5 sum of the username, group, and password
	21	* with the server-supplied nonce value.
	22	* httpMD5String() - Convert an MD5 sum to a character string.
	23	*/
	24
	25	/*
	26	* Include necessary headers...
	27	*/
	28
f7deaa1a	29	#include "http-private.h"
71e16022	30	#include "string-private.h"
ef416fc2	31
	32
	33	/*
	34	* 'httpMD5()' - Compute the MD5 sum of the username:group:password.
	35	*/
	36
	37	char * /* O - MD5 sum */
	38	httpMD5(const char username, / I - User name */
	39	const char realm, / I - Realm name */
	40	const char passwd, / I - Password string */
	41	char md5[33]) /* O - MD5 string */
	42	{
	43	_cups_md5_state_t state; /* MD5 state info */
	44	unsigned char sum[16]; /* Sum data */
	45	char line[256]; /* Line to sum */
	46
	47
	48	/*
	49	* Compute the MD5 sum of the user name, group name, and password.
	50	*/
	51
	52	snprintf(line, sizeof(line), "%s:%s:%s", username, realm, passwd);
757d2cad	53	_cupsMD5Init(&state);
	54	_cupsMD5Append(&state, (unsigned char *)line, (int)strlen(line));
	55	_cupsMD5Finish(&state, sum);
ef416fc2	56
	57	/*
	58	* Return the sum...
	59	*/
	60
	61	return (httpMD5String(sum, md5));
	62	}
	63
	64
	65	/*
	66	* 'httpMD5Final()' - Combine the MD5 sum of the username, group, and password
	67	* with the server-supplied nonce value, method, and
	68	* request-uri.
	69	*/
	70
	71	char * /* O - New sum */
	72	httpMD5Final(const char nonce, / I - Server nonce value */
	73	const char method, / I - METHOD (GET, POST, etc.) */
	74	const char resource, / I - Resource path */
	75	char md5[33]) /* IO - MD5 sum */
	76	{
	77	_cups_md5_state_t state; /* MD5 state info */
	78	unsigned char sum[16]; /* Sum data */
	79	char line[1024]; /* Line of data */
	80	char a2[33]; /* Hash of method and resource */
	81
	82
	83	/*
	84	* First compute the MD5 sum of the method and resource...
	85	*/
	86
	87	snprintf(line, sizeof(line), "%s:%s", method, resource);
757d2cad	88	_cupsMD5Init(&state);
	89	_cupsMD5Append(&state, (unsigned char *)line, (int)strlen(line));
	90	_cupsMD5Finish(&state, sum);
ef416fc2	91	httpMD5String(sum, a2);
	92
	93	/*
	94	* Then combine A1 (MD5 of username, realm, and password) with the nonce
	95	* and A2 (method + resource) values to get the final MD5 sum for the
	96	* request...
	97	*/
	98
	99	snprintf(line, sizeof(line), "%s:%s:%s", md5, nonce, a2);
	100
757d2cad	101	_cupsMD5Init(&state);
	102	_cupsMD5Append(&state, (unsigned char *)line, (int)strlen(line));
	103	_cupsMD5Finish(&state, sum);
ef416fc2	104
	105	return (httpMD5String(sum, md5));
	106	}
	107
	108
	109	/*
	110	* 'httpMD5String()' - Convert an MD5 sum to a character string.
	111	*/
	112
	113	char * /* O - MD5 sum in hex */
	114	httpMD5String(const unsigned char sum, / I - MD5 sum data */
	115	char md5[33])
	116	/* O - MD5 sum in hex */
	117	{
	118	int i; /* Looping var */
	119	char md5ptr; / Pointer into MD5 string */
	120	static const char hex[] = "0123456789abcdef";
	121	/* Hex digits */
	122
	123
	124	/*
	125	* Convert the MD5 sum to hexadecimal...
	126	*/
	127
	128	for (i = 16, md5ptr = md5; i > 0; i --, sum ++)
	129	{
	130	md5ptr++ = hex[sum >> 4];
	131	md5ptr++ = hex[sum & 15];
	132	}
	133
	134	*md5ptr = '\0';
	135
	136	return (md5);
	137	}
	138
	139
	140	/*
f2d18633	141	* End of "$Id$".
ef416fc2	142	*/