1--- 2c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. 3SPDX-License-Identifier: curl 4Title: CURLOPT_PROXY_CAINFO_BLOB 5Section: 3 6Source: libcurl 7See-also: 8 - CURLOPT_CAINFO (3) 9 - CURLOPT_CAINFO_BLOB (3) 10 - CURLOPT_CAPATH (3) 11 - CURLOPT_PROXY_CAINFO (3) 12 - CURLOPT_PROXY_CAPATH (3) 13 - CURLOPT_PROXY_SSL_VERIFYHOST (3) 14 - CURLOPT_PROXY_SSL_VERIFYPEER (3) 15 - CURLOPT_SSL_VERIFYHOST (3) 16 - CURLOPT_SSL_VERIFYPEER (3) 17Protocol: 18 - TLS 19TLS-backend: 20 - OpenSSL 21 - rustls 22 - Secure Transport 23 - Schannel 24--- 25 26# NAME 27 28CURLOPT_PROXY_CAINFO_BLOB - proxy Certificate Authority (CA) bundle in PEM format 29 30# SYNOPSIS 31 32~~~c 33#include <curl/curl.h> 34 35CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_CAINFO_BLOB, 36 struct curl_blob *stblob); 37~~~ 38 39# DESCRIPTION 40 41This option is for connecting to an HTTPS proxy, not an HTTPS server. 42 43Pass a pointer to a curl_blob structure, which contains information (pointer 44and size) about a memory block with binary data of PEM encoded content holding 45one or more certificates to verify the HTTPS proxy with. 46 47If the blob is initialized with the flags member of struct curl_blob set to 48CURL_BLOB_COPY, the application does not have to keep the buffer around after 49setting this. 50 51If CURLOPT_PROXY_SSL_VERIFYPEER(3) is zero and you avoid verifying the 52server's certificate, CURLOPT_PROXY_CAINFO_BLOB(3) is not needed. 53 54This option overrides CURLOPT_PROXY_CAINFO(3). 55 56# DEFAULT 57 58NULL 59 60# EXAMPLE 61 62~~~c 63#include <string.h> /* for strlen */ 64 65extern char *strpem; /* strpem must point to a PEM string */ 66int main(void) 67{ 68 CURL *curl = curl_easy_init(); 69 if(curl) { 70 CURLcode res; 71 struct curl_blob blob; 72 curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/"); 73 /* using an HTTPS proxy */ 74 curl_easy_setopt(curl, CURLOPT_PROXY, "https://localhost:443"); 75 blob.data = strpem; 76 blob.len = strlen(strpem); 77 blob.flags = CURL_BLOB_COPY; 78 curl_easy_setopt(curl, CURLOPT_PROXY_CAINFO_BLOB, &blob); 79 res = curl_easy_perform(curl); 80 curl_easy_cleanup(curl); 81 } 82} 83~~~ 84 85# AVAILABILITY 86 87Added in 7.77.0. 88 89This option is supported by the rustls (since 7.82.0), OpenSSL, Secure 90Transport and Schannel backends. 91 92# RETURN VALUE 93 94Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or 95CURLE_OUT_OF_MEMORY if there was insufficient heap space. 96