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--- curl/src/tool_main.c 2020-01-18 23:47:34.559751631 +0300
+++ curl/tool_main.c 2020-01-20 16:07:17.183814044 +0300
@@ -32,6 +32,10 @@
#include <plarenas.h>
#endif
+#include <stdlib.h> /* setenv(), _putenv() */
+
+#include <libca-certificates-curl/path.h>
+
#define ENABLE_CURLX_PRINTF
/* use our own printf() functions */
#include "curlx.h"
@@ -138,6 +142,41 @@ static void memory_tracking_init(void)
*/
static CURLcode main_init(struct GlobalConfig *config)
{
+ /* Set the SSL_CERT_FILE environment variable to refer to the bundled CA
+ * certificates, unless it is already set, and switch to the OpenSSL
+ * backend.
+ */
+ char* env = curlx_getenv ("SSL_CERT_FILE");
+
+ if (env == NULL)
+ {
+ int r;
+
+#ifndef _WIN32
+ r = setenv ("SSL_CERT_FILE", ca_certificates_file (), 0 /* overwrite */);
+#else
+ char* v = curl_maprintf ("SSL_CERT_FILE=%s", ca_certificates_file ());
+
+ if (v != NULL)
+ {
+ r = _putenv (v);
+ free (v);
+ }
+ else
+ r = -1;
+#endif
+
+ if (r == -1)
+ return CURLE_FAILED_INIT;
+ }
+ else
+ curl_free (env);
+
+ if (curl_global_sslset (CURLSSLBACKEND_OPENSSL,
+ NULL /* name */,
+ NULL /* avail */) != CURLSSLSET_OK)
+ return CURLE_FAILED_INIT;
+
CURLcode result = CURLE_OK;
#if defined(__DJGPP__) || defined(__GO32__)
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