1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 * SPDX-License-Identifier: curl
22 *
23 ***************************************************************************/
24
25 /* <DESC>
26 * Get POP3 email using implicit SSL
27 * </DESC>
28 */
29
30 #include <stdio.h>
31 #include <curl/curl.h>
32
33 /* This is a simple example showing how to retrieve mail using libcurl's POP3
34 * capabilities. It builds on the pop3-retr.c example adding transport
35 * security to protect the authentication details from being snooped.
36 *
37 * Note that this example requires libcurl 7.20.0 or above.
38 */
39
main(void)40 int main(void)
41 {
42 CURL *curl;
43 CURLcode res = CURLE_OK;
44
45 curl = curl_easy_init();
46 if(curl) {
47 /* Set username and password */
48 curl_easy_setopt(curl, CURLOPT_USERNAME, "user");
49 curl_easy_setopt(curl, CURLOPT_PASSWORD, "secret");
50
51 /* This retrieves message 1 from the user's mailbox. Note the use of
52 * pop3s:// rather than pop3:// to request a SSL based connection. */
53 curl_easy_setopt(curl, CURLOPT_URL, "pop3s://pop.example.com/1");
54
55 /* If you want to connect to a site who is not using a certificate that is
56 * signed by one of the certs in the CA bundle you have, you can skip the
57 * verification of the server's certificate. This makes the connection
58 * A LOT LESS SECURE.
59 *
60 * If you have a CA cert for the server stored someplace else than in the
61 * default bundle, then the CURLOPT_CAPATH option might come handy for
62 * you. */
63 #ifdef SKIP_PEER_VERIFICATION
64 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
65 #endif
66
67 /* If the site you are connecting to uses a different host name that what
68 * they have mentioned in their server certificate's commonName (or
69 * subjectAltName) fields, libcurl refuses to connect. You can skip this
70 * check, but it makes the connection insecure. */
71 #ifdef SKIP_HOSTNAME_VERIFICATION
72 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L);
73 #endif
74
75 /* Since the traffic is encrypted, it is useful to turn on debug
76 * information within libcurl to see what is happening during the
77 * transfer */
78 curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
79
80 /* Perform the retr */
81 res = curl_easy_perform(curl);
82
83 /* Check for errors */
84 if(res != CURLE_OK)
85 fprintf(stderr, "curl_easy_perform() failed: %s\n",
86 curl_easy_strerror(res));
87
88 /* Always cleanup */
89 curl_easy_cleanup(curl);
90 }
91
92 return (int)res;
93 }
94
