PS:用C语言就可以破解吗？
/* * * descambles cisco IOS type-7 passwords * * found somewhere on the internet, slightly modified, * * * * gcc -Wall -o ciscocrack ciscocrack.c * * ./ciscocrack 01178E05590909022A * * * */
#include <stdio.h> #include <ctype.h>
char xlat[] = { 0x64, 0x73, 0x66, 0x64, 0x3b, 0x6b, 0x66, 0x6f, 0x41, 0x2c, 0x2e, 0x69, 0x79, 0x65, 0x77, 0x72, 0x6b, 0x6c, 0x64, 0x4a, 0x4b, 0x44, 0x48, 0x53, 0x55, 0x42 };
int cdecrypt(char *enc_pw, char *dec_pw) { unsigned int seed, i, val = 0;
if(strlen(enc_pw) & 1) return(-1);
seed = (enc_pw[0] - '0') * 10 + enc_pw[1] - '0';
if (seed > 15 || !isdigit(enc_pw[0]) || !isdigit(enc_pw[1])) return(-1);
for (i = 2 ; i <= strlen(enc_pw); i++) { if(i !=2 && !(i & 1)) { dec_pw[i / 2 - 2] = val ^ xlat[seed++]; val = 0; }
val *= 16;
if(isdigit(enc_pw[i] = toupper(enc_pw[i]))) { val += enc_pw[i] - '0'; continue; }
if(enc_pw[i] >= 'A' && enc_pw[i] <= 'F') { val += enc_pw[i] - 'A' + 10; continue; }
if(strlen(enc_pw) != i) return(-1); }
dec_pw[++i / 2] = 0;
return(0); }
void usage() { fprintf(stdout, "Usage: ciscocrack <encrypted password>\n"); }
int main(int argc, char *argv[]) { char passwd[65];
memset(passwd, 0, sizeof(passwd));
if(argc != 2) { usage(); exit(1); }
if(cdecrypt(argv[1], passwd)) { fprintf(stderr, "Error\n"); exit(1); } printf("Passwd: %s\n", passwd);
return 0; }
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本文转自loveme2351CTO博客，原文链接：http://blog.51cto.com/loveme23/121406，如需转载请自行联系原作者