pop3-ssl.c 3.2 KB

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  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. /* <DESC>
  25. * Get POP3 email using implicit SSL
  26. * </DESC>
  27. */
  28. #include <stdio.h>
  29. #include <curl/curl.h>
  30. /* This is a simple example showing how to retrieve mail using libcurl's POP3
  31. * capabilities. It builds on the pop3-retr.c example adding transport
  32. * security to protect the authentication details from being snooped.
  33. *
  34. * Note that this example requires libcurl 7.20.0 or above.
  35. */
  36. int main(void)
  37. {
  38. CURL *curl;
  39. CURLcode res = CURLE_OK;
  40. curl = curl_easy_init();
  41. if(curl) {
  42. /* Set username and password */
  43. curl_easy_setopt(curl, CURLOPT_USERNAME, "user");
  44. curl_easy_setopt(curl, CURLOPT_PASSWORD, "secret");
  45. /* This retrieves message 1 from the user's mailbox. Note the use of
  46. * pop3s:// rather than pop3:// to request a SSL based connection. */
  47. curl_easy_setopt(curl, CURLOPT_URL, "pop3s://pop.example.com/1");
  48. /* If you want to connect to a site who is not using a certificate that is
  49. * signed by one of the certs in the CA bundle you have, you can skip the
  50. * verification of the server's certificate. This makes the connection
  51. * A LOT LESS SECURE.
  52. *
  53. * If you have a CA cert for the server stored someplace else than in the
  54. * default bundle, then the CURLOPT_CAPATH option might come handy for
  55. * you. */
  56. #ifdef SKIP_PEER_VERIFICATION
  57. curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
  58. #endif
  59. /* If the site you are connecting to uses a different host name that what
  60. * they have mentioned in their server certificate's commonName (or
  61. * subjectAltName) fields, libcurl refuses to connect. You can skip this
  62. * check, but it makes the connection insecure. */
  63. #ifdef SKIP_HOSTNAME_VERIFICATION
  64. curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L);
  65. #endif
  66. /* Since the traffic is encrypted, it is useful to turn on debug
  67. * information within libcurl to see what is happening during the
  68. * transfer */
  69. curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
  70. /* Perform the retr */
  71. res = curl_easy_perform(curl);
  72. /* Check for errors */
  73. if(res != CURLE_OK)
  74. fprintf(stderr, "curl_easy_perform() failed: %s\n",
  75. curl_easy_strerror(res));
  76. /* Always cleanup */
  77. curl_easy_cleanup(curl);
  78. }
  79. return (int)res;
  80. }