mirror of
https://github.com/curl/curl.git
synced 2024-11-27 05:50:21 +08:00
139 lines
4.3 KiB
C
139 lines
4.3 KiB
C
/***************************************************************************
|
|
* _ _ ____ _
|
|
* Project ___| | | | _ \| |
|
|
* / __| | | | |_) | |
|
|
* | (__| |_| | _ <| |___
|
|
* \___|\___/|_| \_\_____|
|
|
*
|
|
* Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
|
|
*
|
|
* This software is licensed as described in the file COPYING, which
|
|
* you should have received as part of this distribution. The terms
|
|
* are also available at https://curl.haxx.se/docs/copyright.html.
|
|
*
|
|
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
|
|
* copies of the Software, and permit persons to whom the Software is
|
|
* furnished to do so, under the terms of the COPYING file.
|
|
*
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
* RFC2195 CRAM-MD5 authentication
|
|
*
|
|
***************************************************************************/
|
|
|
|
#include "curl_setup.h"
|
|
|
|
#if !defined(CURL_DISABLE_CRYPTO_AUTH)
|
|
|
|
#include <curl/curl.h>
|
|
#include "urldata.h"
|
|
|
|
#include "vauth/vauth.h"
|
|
#include "curl_base64.h"
|
|
#include "curl_hmac.h"
|
|
#include "curl_md5.h"
|
|
#include "warnless.h"
|
|
#include "curl_printf.h"
|
|
|
|
/* The last #include files should be: */
|
|
#include "curl_memory.h"
|
|
#include "memdebug.h"
|
|
|
|
/*
|
|
* Curl_auth_decode_cram_md5_message()
|
|
*
|
|
* This is used to decode an already encoded CRAM-MD5 challenge message.
|
|
*
|
|
* Parameters:
|
|
*
|
|
* chlg64 [in] - The base64 encoded challenge message.
|
|
* outptr [in/out] - The address where a pointer to newly allocated memory
|
|
* holding the result will be stored upon completion.
|
|
* outlen [out] - The length of the output message.
|
|
*
|
|
* Returns CURLE_OK on success.
|
|
*/
|
|
CURLcode Curl_auth_decode_cram_md5_message(const char *chlg64, char **outptr,
|
|
size_t *outlen)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
size_t chlg64len = strlen(chlg64);
|
|
|
|
*outptr = NULL;
|
|
*outlen = 0;
|
|
|
|
/* Decode the challenge if necessary */
|
|
if(chlg64len && *chlg64 != '=')
|
|
result = Curl_base64_decode(chlg64, (unsigned char **) outptr, outlen);
|
|
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Curl_auth_create_cram_md5_message()
|
|
*
|
|
* This is used to generate an already encoded CRAM-MD5 response message ready
|
|
* for sending to the recipient.
|
|
*
|
|
* Parameters:
|
|
*
|
|
* data [in] - The session handle.
|
|
* chlg [in] - The challenge.
|
|
* userp [in] - The user name.
|
|
* passdwp [in] - The user's password.
|
|
* outptr [in/out] - The address where a pointer to newly allocated memory
|
|
* holding the result will be stored upon completion.
|
|
* outlen [out] - The length of the output message.
|
|
*
|
|
* Returns CURLE_OK on success.
|
|
*/
|
|
CURLcode Curl_auth_create_cram_md5_message(struct Curl_easy *data,
|
|
const char *chlg,
|
|
const char *userp,
|
|
const char *passwdp,
|
|
char **outptr, size_t *outlen)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
size_t chlglen = 0;
|
|
HMAC_context *ctxt;
|
|
unsigned char digest[MD5_DIGEST_LEN];
|
|
char *response;
|
|
|
|
if(chlg)
|
|
chlglen = strlen(chlg);
|
|
|
|
/* Compute the digest using the password as the key */
|
|
ctxt = Curl_HMAC_init(Curl_HMAC_MD5,
|
|
(const unsigned char *) passwdp,
|
|
curlx_uztoui(strlen(passwdp)));
|
|
if(!ctxt)
|
|
return CURLE_OUT_OF_MEMORY;
|
|
|
|
/* Update the digest with the given challenge */
|
|
if(chlglen > 0)
|
|
Curl_HMAC_update(ctxt, (const unsigned char *) chlg,
|
|
curlx_uztoui(chlglen));
|
|
|
|
/* Finalise the digest */
|
|
Curl_HMAC_final(ctxt, digest);
|
|
|
|
/* Generate the response */
|
|
response = aprintf(
|
|
"%s %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
|
|
userp, digest[0], digest[1], digest[2], digest[3], digest[4],
|
|
digest[5], digest[6], digest[7], digest[8], digest[9], digest[10],
|
|
digest[11], digest[12], digest[13], digest[14], digest[15]);
|
|
if(!response)
|
|
return CURLE_OUT_OF_MEMORY;
|
|
|
|
/* Base64 encode the response */
|
|
result = Curl_base64_encode(data, response, 0, outptr, outlen);
|
|
|
|
free(response);
|
|
|
|
return result;
|
|
}
|
|
|
|
#endif /* !CURL_DISABLE_CRYPTO_AUTH */
|