quickjs-tart

quickjs-based runtime for wallet-core logic
Log | Files | Refs | README | LICENSE

CURLOPT_PROXY_SSL_VERIFYPEER.md (2894B)

      1 ---
      2 c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
      3 SPDX-License-Identifier: curl
      4 Title: CURLOPT_PROXY_SSL_VERIFYPEER
      5 Section: 3
      6 Source: libcurl
      7 See-also:
      8   - CURLOPT_PROXY_SSL_VERIFYHOST (3)
      9   - CURLOPT_SSL_VERIFYHOST (3)
     10   - CURLOPT_SSL_VERIFYPEER (3)
     11 Protocol:
     12   - TLS
     13 TLS-backend:
     14   - All
     15 Added-in: 7.52.0
     16 ---
     17 
     18 # NAME
     19 
     20 CURLOPT_PROXY_SSL_VERIFYPEER - verify the proxy's SSL certificate
     21 
     22 # SYNOPSIS
     23 
     24 ~~~c
     25 #include <curl/curl.h>
     26 
     27 CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_SSL_VERIFYPEER,
     28                           long verify);
     29 ~~~
     30 
     31 # DESCRIPTION
     32 
     33 Pass a long as parameter set to 1L to enable or 0L to disable.
     34 
     35 This option tells curl to verify the authenticity of the HTTPS proxy's
     36 certificate. A value of 1 means curl verifies; 0 (zero) means it does not.
     37 
     38 This is the proxy version of CURLOPT_SSL_VERIFYPEER(3) that is used for
     39 ordinary HTTPS servers.
     40 
     41 When negotiating a TLS or SSL connection, the server sends a certificate
     42 indicating its identity. curl verifies whether the certificate is authentic,
     43 i.e. that you can trust that the server is who the certificate says it is.
     44 This trust is based on a chain of digital signatures, rooted in certification
     45 authority (CA) certificates you supply. curl uses a default bundle of CA
     46 certificates (the path for that is determined at build time) and you can
     47 specify alternate certificates with the CURLOPT_PROXY_CAINFO(3) option or
     48 the CURLOPT_PROXY_CAPATH(3) option.
     49 
     50 When CURLOPT_PROXY_SSL_VERIFYPEER(3) is enabled, and the verification
     51 fails to prove that the certificate is authentic, the connection fails. When
     52 the option is zero, the peer certificate verification succeeds regardless.
     53 
     54 Authenticating the certificate is not enough to be sure about the server. You
     55 typically also want to ensure that the server is the server you mean to be
     56 talking to. Use CURLOPT_PROXY_SSL_VERIFYHOST(3) for that. The check that the
     57 hostname in the certificate is valid for the hostname you are connecting to is
     58 done independently of the CURLOPT_PROXY_SSL_VERIFYPEER(3) option.
     59 
     60 WARNING: disabling verification of the certificate allows bad guys to
     61 man-in-the-middle the communication without you knowing it. Disabling
     62 verification makes the communication insecure. Just having encryption on a
     63 transfer is not enough as you cannot be sure that you are communicating with
     64 the correct end-point.
     65 
     66 # DEFAULT
     67 
     68 1
     69 
     70 # %PROTOCOLS%
     71 
     72 # EXAMPLE
     73 
     74 ~~~c
     75 int main(void)
     76 {
     77   CURL *curl = curl_easy_init();
     78   if(curl) {
     79     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
     80 
     81     /* Set the default value: strict certificate check please */
     82     curl_easy_setopt(curl, CURLOPT_PROXY_SSL_VERIFYPEER, 1L);
     83 
     84     curl_easy_perform(curl);
     85   }
     86 }
     87 ~~~
     88 
     89 # %AVAILABILITY%
     90 
     91 # RETURN VALUE
     92 
     93 curl_easy_setopt(3) returns a CURLcode indicating success or error.
     94 
     95 CURLE_OK (0) means everything was OK, non-zero means an error occurred, see
     96 libcurl-errors(3).