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- /***************************************************************************
- * _ _ ____ _
- * Project ___| | | | _ \| |
- * / __| | | | |_) | |
- * | (__| |_| | _ <| |___
- * \___|\___/|_| \_\_____|
- *
- * Copyright (C) 1998 - 2022, 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.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.
- *
- * SPDX-License-Identifier: curl
- *
- * 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_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_create_cram_md5_message()
- *
- * This is used to generate a CRAM-MD5 response message ready for sending to
- * the recipient.
- *
- * Parameters:
- *
- * chlg [in] - The challenge.
- * userp [in] - The user name.
- * passwdp [in] - The user's password.
- * out [out] - The result storage.
- *
- * Returns CURLE_OK on success.
- */
- CURLcode Curl_auth_create_cram_md5_message(const struct bufref *chlg,
- const char *userp,
- const char *passwdp,
- struct bufref *out)
- {
- struct HMAC_context *ctxt;
- unsigned char digest[MD5_DIGEST_LEN];
- char *response;
- /* 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(Curl_bufref_len(chlg))
- Curl_HMAC_update(ctxt, Curl_bufref_ptr(chlg),
- curlx_uztoui(Curl_bufref_len(chlg)));
- /* 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;
- Curl_bufref_set(out, response, strlen(response), curl_free);
- return CURLE_OK;
- }
- #endif /* !CURL_DISABLE_CRYPTO_AUTH */
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