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authorJohannes Schindelin <johannes.schindelin@gmx.de>2017-07-15 22:30:42 +0200
committerDaniel Stenberg <daniel@haxx.se>2017-08-28 14:56:59 +0200
commita34e141c0964697ced819b37b95a12d074f27209 (patch)
tree09eee1b76170ed2f26ff1b60e4b378f7f6f4ecbe /docs
parent0fb41255549880cc7557615354ba9a80752544fd (diff)
docs/examples: demonstrate how to select SSL backends
The newly-introduced curl_global_sslset() function deserves to be show-cased. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Diffstat (limited to 'docs')
-rw-r--r--docs/INSTALL.md3
-rw-r--r--docs/examples/.gitignore1
-rw-r--r--docs/examples/Makefile.inc2
-rw-r--r--docs/examples/sslbackend.c75
4 files changed, 80 insertions, 1 deletions
diff --git a/docs/INSTALL.md b/docs/INSTALL.md
index 6c2c8ce64..67a9378ff 100644
--- a/docs/INSTALL.md
+++ b/docs/INSTALL.md
@@ -222,6 +222,9 @@ subdirectory run following command from mentioned subdirectory:
In order to build sample program simplessl.c an SSL enabled libcurl is
required, as well as the OpenSSL libeay32.lib and ssleay32.lib libraries.
+In order to build sample program `sslbackend.c`, an SSL enabled libcurl
+is required.
+
## Disabling Specific Protocols in Windows builds
The configure utility, unfortunately, is not available for the Windows
diff --git a/docs/examples/.gitignore b/docs/examples/.gitignore
index aece671c6..f22c7b02f 100644
--- a/docs/examples/.gitignore
+++ b/docs/examples/.gitignore
@@ -70,6 +70,7 @@ smtp-multi
smtp-ssl
smtp-tls
smtp-vrfy
+sslbackend
url2file
usercertinmem
xmlstream
diff --git a/docs/examples/Makefile.inc b/docs/examples/Makefile.inc
index 9b47a952f..31c87a794 100644
--- a/docs/examples/Makefile.inc
+++ b/docs/examples/Makefile.inc
@@ -33,7 +33,7 @@ check_PROGRAMS = 10-at-a-time anyauthput cookie_interface debug fileupload \
imap-search imap-create imap-delete imap-copy imap-noop imap-ssl \
imap-tls imap-multi url2file sftpget ftpsget postinmemory http2-download \
http2-upload http2-serverpush getredirect ftpuploadfrommem \
- ftpuploadresume
+ ftpuploadresume sslbackend
# These examples require external dependencies that may not be commonly
# available on POSIX systems, so don't bother attempting to compile them here.
diff --git a/docs/examples/sslbackend.c b/docs/examples/sslbackend.c
new file mode 100644
index 000000000..84f1b0c24
--- /dev/null
+++ b/docs/examples/sslbackend.c
@@ -0,0 +1,75 @@
+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2017, 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
+ * are also available at https://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+/* <DESC>
+ * Shows HTTPS usage with client certs and optional ssl engine use.
+ * </DESC>
+ */
+#include <assert.h>
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <curl/curl.h>
+
+/*
+ * An SSL-enabled libcurl is required for this sample to work (at least one
+ * SSL backend has to be configured).
+ *
+ * **** This example only works with libcurl 7.56.0 and later! ****
+*/
+
+int main(int argc, char **argv)
+{
+ const char *name = argc > 1 ? argv[1] : "openssl";
+ CURLsslset result;
+
+ if(!strcmp("list", name)) {
+ const curl_ssl_backend **list;
+ int i;
+
+ result = curl_global_sslset(-1, NULL, &list);
+ assert(result == CURLSSLSET_UNKNOWN_BACKEND);
+
+ for(i = 0; list[i]; i++)
+ printf("SSL backend #%d: '%s' (ID: %d)\n",
+ i, list[i]->name, list[i]->id);
+
+ return 0;
+ } else if(isdigit(*name)) {
+ curl_sslbackend id = (curl_sslbackend)atoi(name);
+
+ result = curl_global_sslset(id, NULL, NULL);
+ } else
+ result = curl_global_sslset(-1, name, NULL);
+
+ if(result == CURLSSLSET_UNKNOWN_BACKEND) {
+ fprintf(stderr, "Unknown SSL backend id: %s\n", name);
+ return 1;
+ }
+
+ assert(result == CURLSSLSET_OK);
+
+ printf("Version with SSL backend '%s':\n\n\t%s\n", name, curl_version());
+
+ return 0;
+}