diff options
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/libcurl/opts/CURLOPT_SSL_CTX_FUNCTION.3 | 83 |
1 files changed, 76 insertions, 7 deletions
diff --git a/docs/libcurl/opts/CURLOPT_SSL_CTX_FUNCTION.3 b/docs/libcurl/opts/CURLOPT_SSL_CTX_FUNCTION.3 index eb93855f8..43e04a772 100644 --- a/docs/libcurl/opts/CURLOPT_SSL_CTX_FUNCTION.3 +++ b/docs/libcurl/opts/CURLOPT_SSL_CTX_FUNCTION.3 @@ -5,7 +5,7 @@ .\" * | (__| |_| | _ <| |___ .\" * \___|\___/|_| \_\_____| .\" * -.\" * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al. +.\" * Copyright (C) 1998 - 2016, 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 @@ -50,18 +50,87 @@ callback's error code. Set the \fIuserptr\fP argument with the This function will get called on all new connections made to a server, during the SSL negotiation. The SSL_CTX pointer will be a new one every time. -To use this properly, a non-trivial amount of knowledge of your SSL library -is necessary. For example, you can use this function to call library-specific +To use this properly, a non-trivial amount of knowledge of your SSL library is +necessary. For example, you can use this function to call library-specific callbacks to add additional validation code for certificates, and even to -change the actual URI of a HTTPS request (example used in the lib509 test -case). See also the example section for a replacement of the key, certificate -and trust file settings. +change the actual URI of a HTTPS request. .SH DEFAULT NULL .SH PROTOCOLS All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc. .SH EXAMPLE -TODO +/* OpenSSL specific */ + +#include <openssl/ssl.h> +#include <curl/curl.h> +#include <stdio.h> + +static CURLcode sslctx_function(CURL *curl, void *sslctx, void *parm) +{ + X509_STORE *store; + X509 *cert=NULL; + BIO *bio; + char *mypem = /* example CA cert PEM - shortened */ + "-----BEGIN CERTIFICATE-----\n" + "MIIHPTCCBSWgAwIBAgIBADANBgkqhkiG9w0BAQQFADB5MRAwDgYDVQQKEwdSb290\n" + "IENBMR4wHAYDVQQLExVodHRwOi8vd3d3LmNhY2VydC5vcmcxIjAgBgNVBAMTGUNB\n" + "IENlcnQgU2lnbmluZyBBdXRob3JpdHkxITAfBgkqhkiG9w0BCQEWEnN1cHBvcnRA\n" + "Y2FjZXJ0Lm9yZzAeFw0wMzAzMzAxMjI5NDlaFw0zMzAzMjkxMjI5NDlaMHkxEDAO\n" + "GCSNe9FINSkYQKyTYOGWhlC0elnYjyELn8+CkcY7v2vcB5G5l1YjqrZslMZIBjzk\n" + "zk6q5PYvCdxTby78dOs6Y5nCpqyJvKeyRKANihDjbPIky/qbn3BHLt4Ui9SyIAmW\n" + "omTxJBzcoTWcFbLUvFUufQb1nA5V9FrWk9p2rSVzTMVD\n"\ + "-----END CERTIFICATE-----\n"; + /* get a BIO */ + bio=BIO_new_mem_buf(mypem, -1); + /* use it to read the PEM formatted certificate from memory into an X509 + * structure that SSL can use + */ + PEM_read_bio_X509(bio, &cert, 0, NULL); + if(cert == NULL) + printf("PEM_read_bio_X509 failed...\n"); + + /* get a pointer to the X509 certificate store (which may be empty!) */ + store=SSL_CTX_get_cert_store((SSL_CTX *)sslctx); + + /* add our certificate to this store */ + if(X509_STORE_add_cert(store, cert)==0) + printf("error adding certificate\n"); + + /* decrease reference counts */ + X509_free(cert); + BIO_free(bio); + + /* all set to go */ + return CURLE_OK; +} + +int main(void) +{ + CURL * ch; + CURLcode rv; + + rv=curl_global_init(CURL_GLOBAL_ALL); + ch=curl_easy_init(); + rv=curl_easy_setopt(ch, CURLOPT_SSLCERTTYPE, "PEM"); + rv=curl_easy_setopt(ch, CURLOPT_SSL_VERIFYPEER, 1L); + rv=curl_easy_setopt(ch, CURLOPT_URL, "https://www.example.com/"); + + /* Retrieve page using cacerts' certificate -> will succeed + * load the certificate by installing a function doing the nescessary + * "modifications" to the SSL CONTEXT just before link init + */ + rv=curl_easy_setopt(ch, CURLOPT_SSL_CTX_FUNCTION, *sslctx_function); + rv=curl_easy_perform(ch); + if(rv==CURLE_OK) + printf("*** transfer succeeded ***\n"); + else + printf("*** transfer failed ***\n"); + + curl_easy_cleanup(ch); + curl_global_cleanup(); + return rv; +} + .SH AVAILABILITY Added in 7.11.0 for OpenSSL. Added in 7.42.0 for wolfSSL/CyaSSL. Other SSL backends not supported. |