CURLOPT_PROXY_SSL_VERIFYHOST.3 3.4 KB

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  23. .TH CURLOPT_PROXY_SSL_VERIFYHOST 3 "16 Nov 2016" "libcurl 7.52.0" "curl_easy_setopt options"
  24. .SH NAME
  25. CURLOPT_PROXY_SSL_VERIFYHOST \- verify the proxy certificate's name against host
  26. .SH SYNOPSIS
  27. .nf
  28. #include <curl/curl.h>
  29. CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_SSL_VERIFYHOST,
  30. long verify);
  31. .fi
  32. .SH DESCRIPTION
  33. Pass a long set to 2L as asking curl to \fIverify\fP in the HTTPS proxy's
  34. certificate name fields against the proxy name.
  35. This option determines whether libcurl verifies that the proxy cert contains
  36. the correct name for the name it is known as.
  37. When \fICURLOPT_PROXY_SSL_VERIFYHOST(3)\fP is 2, the proxy certificate must
  38. indicate that the server is the proxy to which you meant to connect to, or the
  39. connection fails.
  40. Curl considers the proxy the intended one when the Common Name field or a
  41. Subject Alternate Name field in the certificate matches the host name in the
  42. proxy string which you told curl to use.
  43. If \fIverify\fP value is set to 1:
  44. In 7.28.0 and earlier: treated as a debug option of some sorts, not supported
  45. anymore due to frequently leading to programmer mistakes.
  46. From 7.28.1 to 7.65.3: setting it to 1 made curl_easy_setopt() return an error
  47. and leaving the flag untouched.
  48. From 7.66.0: treats 1 and 2 the same.
  49. When the \fIverify\fP value is 0L, the connection succeeds regardless of the
  50. names used in the certificate. Use that ability with caution!
  51. See also \fICURLOPT_PROXY_SSL_VERIFYPEER(3)\fP to verify the digital signature
  52. of the proxy certificate. If libcurl is built against NSS and
  53. \fICURLOPT_PROXY_SSL_VERIFYPEER(3)\fP is zero,
  54. \fICURLOPT_PROXY_SSL_VERIFYHOST(3)\fP is also set to zero and cannot be
  55. overridden.
  56. .SH DEFAULT
  57. 2
  58. .SH PROTOCOLS
  59. All protocols when used over an HTTPS proxy.
  60. .SH EXAMPLE
  61. .nf
  62. CURL *curl = curl_easy_init();
  63. if(curl) {
  64. curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
  65. /* Set the default value: strict name check please */
  66. curl_easy_setopt(curl, CURLOPT_PROXY_SSL_VERIFYHOST, 2L);
  67. curl_easy_perform(curl);
  68. }
  69. .fi
  70. .SH AVAILABILITY
  71. Added in 7.52.0.
  72. If built TLS enabled.
  73. .SH RETURN VALUE
  74. Returns CURLE_OK if TLS is supported, and CURLE_UNKNOWN_OPTION if not.
  75. If 1 is set as argument, \fICURLE_BAD_FUNCTION_ARGUMENT\fP is returned.
  76. .SH "SEE ALSO"
  77. .BR CURLOPT_PROXY_SSL_VERIFYPEER "(3), " CURLOPT_PROXY_CAINFO "(3), "
  78. .BR CURLOPT_SSL_VERIFYPEER "(3), " CURLOPT_CAINFO "(3), "