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/*
* "$Id: md5passwd.c 10996 2013-05-29 11:51:34Z msweet $"
*
* 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: md5passwd.c 10996 2013-05-29 11:51:34Z msweet $".
*/
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