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注册日期：2002-07-12
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源代码：：
#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
};
char pw_str1[] = "password 7 ";
char
pw_str2[] = "enable-password 7 ";
char *pname;
cdecrypt(enc_pw, dec_pw)
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);
}
usage()
{
fprintf(stdout, "Usage: %s -p
<encrypted password>\n", pname);
fprintf(stdout, " %s
<router config file> <output file>\n", pname);
return(0);
}
main(argc,argv)
int argc;
char **argv;
{
FILE *in = stdin, *out = stdout;
char line[257];
char passwd[65];
unsigned int i, pw_pos;
pname = argv[0];
if(argc > 1)
{
if(argc
> 3)
{
usage();
exit(1);
}
if(argv[1][0]
== '-')
{
switch(argv[1][1])
{
case 'h':
usage();
break;
case 'p':
if(cdecrypt(argv[2],
passwd))
{
fprintf(stderr, "Error.\n");
exit(1);
}
fprintf(stdout, "password: %s\n", passwd);
break;
default:
fprintf(stderr, "%s: unknow option.", pname);
}
return(0);
}
if((in = fopen(argv[1],
"rt")) == NULL)
exit(1);
if(argc > 2)
if((out =
fopen(argv[2], "wt")) == NULL)
exit(1);
}
while(1)
{
for(i = 0; i < 256; i++)
{
if((line[i] =
fgetc(in)) == EOF)
{
if(i)
break;
fclose(in);
fclose(out);
return(0);
}
if(line[i] == '\r')
i--;
if(line[i] == '\n')
break;
}
pw_pos =
0;
line[i] = 0;
if(!strncmp(line, pw_str1,
strlen(pw_str1)))
pw_pos = strlen(pw_str1);
if(!strncmp(line, pw_str2, strlen(pw_str2)))
pw_pos =
strlen(pw_str2);
if(!pw_pos)
{
fprintf(stdout,
"%s\n", line);
continue;
}
if(cdecrypt(&line[pw_pos], passwd))
{
fprintf(stderr, "Error.\n");
exit(1);
}
else
{
if(pw_pos == strlen(pw_str1))
fprintf(out, "%s", pw_str1);
else
fprintf(out, "%s", pw_str2);
fprintf(out,
"%s\n", passwd);
}
}
}
/* |
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刀光雪影 
Cisco password decrypter V2.0 
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发表于 2002-08-07.20:34:00 
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