rfc2617.c File Reference

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Detailed Description

Serving-CSCF - RFC2617.

Note:

Taken from the auth_db SER module

Definition in file rfc2617.c.

#include <sys/types.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "rfc2617.h"
#include "../../md5global.h"
#include "../../md5.h"

Go to the source code of this file.

Functions
void	cvt_hex (HASH _b, HASHHEX _h)
void	calc_HA1 (ha_alg_t _alg, str *_username, str *_realm, str *_password, str *_nonce, str *_cnonce, HASHHEX _sess_key)
void	calc_H (str *ent, HASHHEX hash)
void	calc_response (HASHHEX _ha1, str *_nonce, str *_nc, str *_cnonce, str *_qop, int _auth_int, str *_method, str *_uri, HASHHEX _hentity, HASHHEX _response)
Variables
static char	hexa_chars [17] = "0123456789abcdef"

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Function Documentation

void cvt_hex	(	HASH	_b,
		HASHHEX	_h
	)			[inline]

Definition at line 52 of file rfc2617.c.

References HASHHEXLEN, HASHLEN, and hexa_chars.

Referenced by calc_H(), calc_HA1(), and calc_response().

{
    unsigned short i;   
    for (i = 0; i < HASHLEN; i++) {
        _h[i * 2] = hexa_chars[(_b[i] >> 4) & 0xf];
        _h[i * 2 + 1] =  hexa_chars[_b[i] & 0xf];
    };
    _h[HASHHEXLEN] = '\0';
}

void calc_HA1	(	ha_alg_t	_alg,
		str *	_username,
		str *	_realm,
		str *	_password,
		str *	_nonce,
		str *	_cnonce,
		HASHHEX	_sess_key
	)

Definition at line 66 of file rfc2617.c.

References cvt_hex(), HA_MD5_SESS, and HASHLEN.

Referenced by S_is_authorized().

{
    MD5_CTX Md5Ctx;
    HASH HA1;
    MD5Init(&Md5Ctx);
    MD5Update(&Md5Ctx, _username->s, _username->len);
    MD5Update(&Md5Ctx, ":", 1);
    MD5Update(&Md5Ctx, _realm->s, _realm->len);
    MD5Update(&Md5Ctx, ":", 1);
    MD5Update(&Md5Ctx, _password->s, _password->len);
    MD5Final(HA1, &Md5Ctx);

    if (_alg == HA_MD5_SESS) {
        MD5Init(&Md5Ctx);
        MD5Update(&Md5Ctx, HA1, HASHLEN);
        MD5Update(&Md5Ctx, ":", 1);
        MD5Update(&Md5Ctx, _nonce->s, _nonce->len);
        MD5Update(&Md5Ctx, ":", 1);
        MD5Update(&Md5Ctx, _cnonce->s, _cnonce->len);
        MD5Final(HA1, &Md5Ctx);
    };

    cvt_hex(HA1, _sess_key);
}

void calc_H	(	str *	ent,
		HASHHEX	hash
	)

Definition at line 92 of file rfc2617.c.

References cvt_hex().

Referenced by S_is_authorized().

{
    MD5_CTX Md5Ctx;
    HASH HA1;
    MD5Init(&Md5Ctx);
    MD5Update(&Md5Ctx, ent->s, ent->len);
    MD5Final(HA1, &Md5Ctx);
    cvt_hex(HA1, hash);
}

void calc_response	(	HASHHEX	_ha1,
		str *	_nonce,
		str *	_nc,
		str *	_cnonce,
		str *	_qop,
		int	_auth_int,
		str *	_method,
		str *	_uri,
		HASHHEX	_hentity,
		HASHHEX	_response
	)

Definition at line 105 of file rfc2617.c.

References cvt_hex(), and HASHHEXLEN.

Referenced by S_is_authorized(), and S_MAR().

                                          : "", "auth", "auth-int" */
           int _auth_int,     /* 1 if auth-int is used */
           str* _method,      /* method from the request */
           str* _uri,         /* requested URL */
           HASHHEX _hentity,  /* H(entity body) if qop="auth-int" */
           HASHHEX _response) /* request-digest or response-digest */
{
    MD5_CTX Md5Ctx;
    HASH HA2;
    HASH RespHash;
    HASHHEX HA2Hex;
    
         /* calculate H(A2) */
    MD5Init(&Md5Ctx);
    MD5Update(&Md5Ctx, _method->s, _method->len);
    MD5Update(&Md5Ctx, ":", 1);
    MD5Update(&Md5Ctx, _uri->s, _uri->len);

    if (_auth_int) {
        MD5Update(&Md5Ctx, ":", 1);
        MD5Update(&Md5Ctx, _hentity, HASHHEXLEN);
    };

    MD5Final(HA2, &Md5Ctx);
    cvt_hex(HA2, HA2Hex);
    
         /* calculate response */
    MD5Init(&Md5Ctx);
    MD5Update(&Md5Ctx, _ha1, HASHHEXLEN);
    MD5Update(&Md5Ctx, ":", 1);
    MD5Update(&Md5Ctx, _nonce->s, _nonce->len);
    MD5Update(&Md5Ctx, ":", 1);

    if (_qop->len) {
        MD5Update(&Md5Ctx, _nc->s, _nc->len);
        MD5Update(&Md5Ctx, ":", 1);
        MD5Update(&Md5Ctx, _cnonce->s, _cnonce->len);
        MD5Update(&Md5Ctx, ":", 1);
        MD5Update(&Md5Ctx, _qop->s, _qop->len);
        MD5Update(&Md5Ctx, ":", 1);
    };
    MD5Update(&Md5Ctx, HA2Hex, HASHHEXLEN);
    MD5Final(RespHash, &Md5Ctx);
    cvt_hex(RespHash, _response);
}

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Variable Documentation

char hexa_chars[17] = "0123456789abcdef" [static]

Definition at line 50 of file rfc2617.c.

Referenced by cvt_hex().

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