diff options
| -rw-r--r-- | docs/examples/Makefile.inc | 6 | ||||
| -rw-r--r-- | docs/examples/pop3-ssl.c | 5 | ||||
| -rw-r--r-- | docs/examples/pop3-tls.c | 84 |
3 files changed, 92 insertions, 3 deletions
diff --git a/docs/examples/Makefile.inc b/docs/examples/Makefile.inc index fe5c8062f..588bcb7ca 100644 --- a/docs/examples/Makefile.inc +++ b/docs/examples/Makefile.inc @@ -6,9 +6,9 @@ check_PROGRAMS = 10-at-a-time anyauthput cookie_interface debug fileupload \ sendrecv httpcustomheader certinfo chkspeed ftpgetinfo ftp-wildcard \ smtp-multi smtp-send smtp-ssl smtp-tls smtp-vrfy smtp-expn rtsp \ externalsocket resolve progressfunc pop3-retr pop3-list pop3-uidl pop3-dele \ - pop3-top pop3-stat pop3-noop pop3-ssl imap-list imap-fetch imap-store \ - imap-append imap-examine imap-search imap-create imap-delete imap-copy \ - imap-noop imap-ssl imap-tls url2file sftpget ftpsget postinmemory + pop3-top pop3-stat pop3-noop pop3-ssl pop3-tls imap-list imap-fetch \ + imap-store imap-append imap-examine imap-search imap-create imap-delete \ + imap-copy imap-noop imap-ssl imap-tls url2file sftpget ftpsget postinmemory # These examples require external dependencies that may not be commonly # available on POSIX systems, so don't bother attempting to compile them here. diff --git a/docs/examples/pop3-ssl.c b/docs/examples/pop3-ssl.c index 81d4c2af1..45e0054b6 100644 --- a/docs/examples/pop3-ssl.c +++ b/docs/examples/pop3-ssl.c @@ -64,6 +64,11 @@ int main(void) curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L); #endif + /* Since the traffic will be encrypted, it is very useful to turn on debug + * information within libcurl to see what is happening during the + * transfer */ + curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L); + /* Perform the retr */ res = curl_easy_perform(curl); diff --git a/docs/examples/pop3-tls.c b/docs/examples/pop3-tls.c new file mode 100644 index 000000000..812d89b8b --- /dev/null +++ b/docs/examples/pop3-tls.c @@ -0,0 +1,84 @@ +/*************************************************************************** + * _ _ ____ _ + * Project ___| | | | _ \| | + * / __| | | | |_) | | + * | (__| |_| | _ <| |___ + * \___|\___/|_| \_\_____| + * + * Copyright (C) 1998 - 2014, 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 http://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. + * + ***************************************************************************/ +#include <stdio.h> +#include <curl/curl.h> + +/* This is a simple example showing how to retrieve mail using libcurl's POP3 + * capabilities. It builds on the pop3-retr.c example adding transport + * security to protect the authentication details from being snooped. + * + * Note that this example requires libcurl 7.20.0 or above. + */ + +int main(void) +{ + CURL *curl; + CURLcode res = CURLE_OK; + + curl = curl_easy_init(); + if(curl) { + /* Set username and password */ + curl_easy_setopt(curl, CURLOPT_USERNAME, "user"); + curl_easy_setopt(curl, CURLOPT_PASSWORD, "secret"); + + /* This will retreive message 1 from the user's mailbox */ + curl_easy_setopt(curl, CURLOPT_URL, "pop3://pop.example.com/1"); + + /* In this example, we'll start with a plain text connection, and upgrade + * to Transport Layer Security (TLS) using the STLS command. Be careful of + * using CURLUSESSL_TRY here, because if TLS upgrade fails, the transfer + * will continue anyway - see the security discussion in the libcurl + * tutorial for more details. */ + curl_easy_setopt(curl, CURLOPT_USE_SSL, (long)CURLUSESSL_ALL); + + /* If your server doesn't have a valid certificate, then you can disable + * part of the Transport Layer Security protection by setting the + * CURLOPT_SSL_VERIFYPEER and CURLOPT_SSL_VERIFYHOST options to 0 (false). + * curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L); + * curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L); + * That is, in general, a bad idea. It is still better than sending your + * authentication details in plain text though. + * Instead, you should get the issuer certificate (or the host certificate + * if the certificate is self-signed) and add it to the set of certificates + * that are known to libcurl using CURLOPT_CAINFO and/or CURLOPT_CAPATH. See + * docs/SSLCERTS for more information. */ + curl_easy_setopt(curl, CURLOPT_CAINFO, "/path/to/certificate.pem"); + + /* Since the traffic will be encrypted, it is very useful to turn on debug + * information within libcurl to see what is happening during the + * transfer */ + curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L); + + /* Perform the retr */ + res = curl_easy_perform(curl); + + /* Check for errors */ + if(res != CURLE_OK) + fprintf(stderr, "curl_easy_perform() failed: %s\n", + curl_easy_strerror(res)); + + /* Always cleanup */ + curl_easy_cleanup(curl); + } + + return (int)res; +} |