http: add support for different sslcert and sslkey types.

Basically git work with default curl ssl type - PEM. But for support
eTokens like SafeNet tokens via pksc11 need setup 'ENG' as sslcert type
and as sslkey type. So there added additional options for http to make
that possible.

Signed-off-by: Stanislav Malishevskiy <stanislav.malishevskiy@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

http.c

@@ -39,6 +39,7 @@ static int curl_ssl_verify = -1;
 static int curl_ssl_try;
 static const char *curl_http_version = NULL;
 static const char *ssl_cert;
+static const char *ssl_cert_type;
 static const char *ssl_cipherlist;
 static const char *ssl_version;
 static struct {
@@ -58,6 +59,7 @@ static struct {
 #endif
 };
 static const char *ssl_key;
+static const char *ssl_key_type;
 static const char *ssl_capath;
 static const char *curl_no_proxy;
 #ifdef GIT_CURL_HAVE_CURLOPT_PINNEDPUBLICKEY
@@ -264,8 +266,12 @@ static int http_options(const char *var, const char *value, void *cb)
 		return git_config_string(&ssl_version, var, value);
 	if (!strcmp("http.sslcert", var))
 		return git_config_pathname(&ssl_cert, var, value);
+	if (!strcmp("http.sslcerttype", var))
+		return git_config_string(&ssl_cert_type, var, value);
 	if (!strcmp("http.sslkey", var))
 		return git_config_pathname(&ssl_key, var, value);
+	if (!strcmp("http.sslkeytype", var))
+		return git_config_string(&ssl_key_type, var, value);
 	if (!strcmp("http.sslcapath", var))
 		return git_config_pathname(&ssl_capath, var, value);
 	if (!strcmp("http.sslcainfo", var))
@@ -904,10 +910,14 @@ static CURL *get_curl_handle(void)
 
 	if (ssl_cert)
 		curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
+	if (ssl_cert_type)
+		curl_easy_setopt(result, CURLOPT_SSLCERTTYPE, ssl_cert_type);
 	if (has_cert_password())
 		curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password);
 	if (ssl_key)
 		curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
+	if (ssl_key_type)
+		curl_easy_setopt(result, CURLOPT_SSLKEYTYPE, ssl_key_type);
 	if (ssl_capath)
 		curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
 #ifdef GIT_CURL_HAVE_CURLOPT_PINNEDPUBLICKEY
@@ -1142,7 +1152,9 @@ void http_init(struct remote *remote, const char *url, int proactive_auth)
 		curl_ssl_verify = 0;
 
 	set_from_env(&ssl_cert, "GIT_SSL_CERT");
+	set_from_env(&ssl_cert_type, "GIT_SSL_CERT_TYPE");
 	set_from_env(&ssl_key, "GIT_SSL_KEY");
+	set_from_env(&ssl_key_type, "GIT_SSL_KEY_TYPE");
 	set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
 	set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");