[SOLVED] CHAP Modification
christov at aztecamobile.com
Wed Feb 28 17:30:05 CET 2007
Alan DeKok-4 wrote:
> ChristosH wrote:
>> It's a VALUE_PAIR type, so could I check and modify the password->length
>> password->strvalue in that function?
> Huh? Why? Do it elsewhere.
Well, that's part of my issue; where's the best place to check the password
and convert it to binary when needed.
In the rlm_chap.C file I also notice that there's the code:
DEBUG(" rlm_chap: Using clear text password \"%s\" for user %s
if (memcmp(pass_str+1,request->password->strvalue+1,CHAP_VALUE_LENGTH) !=
DEBUG(" rlm_chap: Password check failed");
snprintf(module_fmsg,sizeof(module_fmsg),"rlm_chap: Wrong user password");
module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
Could I also modify the password there? I'm just trying to find the easiest
way to check if the password should be read as a string or binary and then
parse it properly BEFORE it is CHAP encoded because I can't change the
> Also, is there a C function included in the libraries that will allow me
> convert a hex string to binary? I'm worried I might get stuck in ASCII ->
> HEX -> BINARY conversions.
Yes. see "bin2hex" and "hex2bin". See also rlm_pap in 1.1.4, which
does a lot of this kind of normalization already.
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