Return to main-response.c CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / coova-chilli / src

Annotation of embedaddon/coova-chilli/src/main-response.c, revision 1.1

1.1     ! misho       1: /* 
        !             2:  *
        !             3:  * Copyright (C) 2003, 2004, 2005 Mondru AB.
        !             4:  * Copyright (c) 2006-2007 David Bird <david@coova.com>
        !             5:  *
        !             6:  * The contents of this file may be used under the terms of the GNU
        !             7:  * General Public License Version 2, provided that the above copyright
        !             8:  * notice and this permission notice is included in all copies or
        !             9:  * substantial portions of the software.
        !            10:  * 
        !            11:  */
        !            12: 
        !            13: #include "system.h"
        !            14: #include "md5.h"
        !            15: #define MD5LEN 16
        !            16: 
        !            17: static int usage(char *program) {
        !            18:   fprintf(stderr, "Usage: %s <challenge> <uamsecret> <password>\n", program);
        !            19:   return 1;
        !            20: }
        !            21: 
        !            22: static int hextochar(char *src, unsigned char * dst) {
        !            23:   char x[3];
        !            24:   int n;
        !            25:   int y;
        !            26: 
        !            27:   for (n=0; n < MD5LEN; n++) {
        !            28:     x[0] = src[n*2+0];
        !            29:     x[1] = src[n*2+1];
        !            30:     x[2] = 0;
        !            31: 
        !            32:     if (sscanf(x, "%2x", &y) != 1)
        !            33:       return -1;
        !            34: 
        !            35:     dst[n] = (unsigned char) y;
        !            36:   }
        !            37: 
        !            38:   return 0;
        !            39: }
        !            40: 
        !            41: static int chartohex(unsigned char *src, char *dst) {
        !            42:   char x[3];
        !            43:   int n;
        !            44:   
        !            45:   for (n=0; n < MD5LEN; n++) {
        !            46:     snprintf(x, 3, "%.2x", src[n]);
        !            47:     dst[n*2+0] = x[0];
        !            48:     dst[n*2+1] = x[1];
        !            49:   }
        !            50:   dst[MD5LEN*2] = 0;
        !            51:   return 0;
        !            52: }
        !            53: 
        !            54: int main(int argc, char **argv) {
        !            55:   unsigned char chap_ident = 0;
        !            56:   unsigned char challenge[MD5LEN];
        !            57:   unsigned char response[MD5LEN];
        !            58:   char buffer[MD5LEN*3];
        !            59:   MD5_CTX context;
        !            60: 
        !            61:   if (argc != 4 && argc != 5) 
        !            62:     return usage(argv[0]);
        !            63: 
        !            64:   if (argc == 5) 
        !            65:     chap_ident = atoi(argv[4]);
        !            66: 
        !            67:   /* challeng - argv 1 */
        !            68:   memset(buffer, 0, sizeof(buffer));
        !            69:   /*fprintf(stderr,"challenge: %s\n",argv[1]);*/
        !            70:   strcpy(buffer, argv[1]);
        !            71:   hextochar(buffer, challenge);
        !            72: 
        !            73:   MD5Init(&context);
        !            74:   MD5Update(&context, challenge, MD5LEN);
        !            75:   /* uamsecret - argv 2 */
        !            76:   /*fprintf(stderr,"uamsecret: %s\n",argv[2]);*/
        !            77:   MD5Update(&context, (uint8_t*)argv[2], strlen(argv[2]));
        !            78:   MD5Final(challenge, &context);
        !            79: 
        !            80:   MD5Init(&context);
        !            81:   MD5Update(&context, (uint8_t*)&chap_ident, 1);         
        !            82:   /* password - argv 3 */
        !            83:   /*fprintf(stderr,"password: %s\n",argv[3]);*/
        !            84:   MD5Update(&context, (uint8_t*)argv[3], strlen(argv[3]));
        !            85:   MD5Update(&context, challenge, MD5LEN);
        !            86:   MD5Final(response, &context);
        !            87: 
        !            88:   chartohex(response, buffer);
        !            89:   printf("%s\n", buffer);
        !            90:   return 0;
        !            91: }