| 1 | /***************************************************************************
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| 2 | * _ _ ____ _
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| 3 | * Project ___| | | | _ \| |
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| 4 | * / __| | | | |_) | |
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| 5 | * | (__| |_| | _ <| |___
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| 6 | * \___|\___/|_| \_\_____|
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| 7 | *
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| 8 | * Copyright (C) Daniel Stenberg, <[email protected]>, et al.
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| 9 | *
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| 10 | * This software is licensed as described in the file COPYING, which
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| 11 | * you should have received as part of this distribution. The terms
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| 12 | * are also available at https://curl.se/docs/copyright.html.
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| 13 | *
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| 14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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| 15 | * copies of the Software, and permit persons to whom the Software is
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| 16 | * furnished to do so, under the terms of the COPYING file.
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| 17 | *
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| 18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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| 19 | * KIND, either express or implied.
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| 20 | *
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| 21 | * SPDX-License-Identifier: curl
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| 22 | *
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| 23 | * RFC4616 PLAIN authentication
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| 24 | * Draft LOGIN SASL Mechanism <draft-murchison-sasl-login-00.txt>
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| 25 | *
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| 26 | ***************************************************************************/
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| 27 |
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| 28 | #include "curl_setup.h"
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| 29 |
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| 30 | #if !defined(CURL_DISABLE_IMAP) || !defined(CURL_DISABLE_SMTP) || \
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| 31 | !defined(CURL_DISABLE_POP3) || \
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| 32 | (!defined(CURL_DISABLE_LDAP) && defined(USE_OPENLDAP))
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| 33 |
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| 34 | #include <curl/curl.h>
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| 35 | #include "urldata.h"
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| 36 |
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| 37 | #include "vauth/vauth.h"
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| 38 | #include "warnless.h"
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| 39 | #include "strtok.h"
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| 40 | #include "sendf.h"
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| 41 | #include "curl_printf.h"
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| 42 |
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| 43 | /* The last #include files should be: */
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| 44 | #include "curl_memory.h"
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| 45 | #include "memdebug.h"
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| 46 |
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| 47 | /*
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| 48 | * Curl_auth_create_plain_message()
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| 49 | *
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| 50 | * This is used to generate an already encoded PLAIN message ready
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| 51 | * for sending to the recipient.
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| 52 | *
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| 53 | * Parameters:
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| 54 | *
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| 55 | * authzid [in] - The authorization identity.
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| 56 | * authcid [in] - The authentication identity.
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| 57 | * passwd [in] - The password.
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| 58 | * out [out] - The result storage.
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| 59 | *
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| 60 | * Returns CURLE_OK on success.
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| 61 | */
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| 62 | CURLcode Curl_auth_create_plain_message(const char *authzid,
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| 63 | const char *authcid,
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| 64 | const char *passwd,
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| 65 | struct bufref *out)
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| 66 | {
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| 67 | char *plainauth;
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| 68 | size_t plainlen;
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| 69 | size_t zlen;
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| 70 | size_t clen;
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| 71 | size_t plen;
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| 72 |
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| 73 | zlen = (authzid == NULL ? 0 : strlen(authzid));
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| 74 | clen = strlen(authcid);
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| 75 | plen = strlen(passwd);
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| 76 |
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| 77 | /* Compute binary message length. Check for overflows. */
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| 78 | if((zlen > SIZE_T_MAX/4) || (clen > SIZE_T_MAX/4) ||
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| 79 | (plen > (SIZE_T_MAX/2 - 2)))
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| 80 | return CURLE_OUT_OF_MEMORY;
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| 81 | plainlen = zlen + clen + plen + 2;
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| 82 |
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| 83 | plainauth = malloc(plainlen + 1);
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| 84 | if(!plainauth)
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| 85 | return CURLE_OUT_OF_MEMORY;
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| 86 |
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| 87 | /* Calculate the reply */
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| 88 | if(zlen)
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| 89 | memcpy(plainauth, authzid, zlen);
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| 90 | plainauth[zlen] = '\0';
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| 91 | memcpy(plainauth + zlen + 1, authcid, clen);
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| 92 | plainauth[zlen + clen + 1] = '\0';
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| 93 | memcpy(plainauth + zlen + clen + 2, passwd, plen);
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| 94 | plainauth[plainlen] = '\0';
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| 95 | Curl_bufref_set(out, plainauth, plainlen, curl_free);
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| 96 | return CURLE_OK;
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| 97 | }
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| 98 |
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| 99 | /*
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| 100 | * Curl_auth_create_login_message()
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| 101 | *
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| 102 | * This is used to generate an already encoded LOGIN message containing the
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| 103 | * user name or password ready for sending to the recipient.
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| 104 | *
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| 105 | * Parameters:
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| 106 | *
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| 107 | * valuep [in] - The user name or user's password.
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| 108 | * out [out] - The result storage.
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| 109 | *
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| 110 | * Returns CURLE_OK on success.
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| 111 | */
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| 112 | CURLcode Curl_auth_create_login_message(const char *valuep, struct bufref *out)
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| 113 | {
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| 114 | Curl_bufref_set(out, valuep, strlen(valuep), NULL);
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| 115 | return CURLE_OK;
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| 116 | }
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| 117 |
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| 118 | /*
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| 119 | * Curl_auth_create_external_message()
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| 120 | *
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| 121 | * This is used to generate an already encoded EXTERNAL message containing
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| 122 | * the user name ready for sending to the recipient.
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| 123 | *
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| 124 | * Parameters:
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| 125 | *
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| 126 | * user [in] - The user name.
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| 127 | * out [out] - The result storage.
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| 128 | *
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| 129 | * Returns CURLE_OK on success.
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| 130 | */
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| 131 | CURLcode Curl_auth_create_external_message(const char *user,
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| 132 | struct bufref *out)
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| 133 | {
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| 134 | /* This is the same formatting as the login message */
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| 135 | return Curl_auth_create_login_message(user, out);
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| 136 | }
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| 137 |
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| 138 | #endif /* if no users */
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