Add libcrypto_version().

src/tests/00basic.vtc

@@ -33,6 +33,10 @@ varnish v1 -vcl {
 		if (!resp.http.x-version) {
 			set resp.status = 500;
 		}
+		set resp.http.x-libcrypto-version = ece.libcrypto_version();
+		if (!resp.http.x-libcrypto-version) {
+			set resp.status = 500;
+		}
 		return(deliver);
 	}
 }
@@ -42,4 +46,5 @@ client c1 {
 	rxresp
 	expect resp.status == 200
 	expect resp.http.x-version ~ "^.+$"
+	expect resp.http.x-libcrypto-version ~ "^.+$"
 } -run

src/vmod_ece.c

@@ -28,6 +28,8 @@
 
 #include "config.h"
 
+#include <openssl/crypto.h>
+
 #include "cache/cache.h"
 
 #include "vcc_if.h"
@@ -59,6 +61,16 @@ VPFX(event)(VRT_CTX, struct vmod_priv *priv, enum vcl_event_e e)
 	NEEDLESS(return (0));
 }
 
+VCL_STRING
+vmod_libcrypto_version(VRT_CTX)
+{
+	(void)ctx;
+	VCL_STRING version = OpenSSL_version(OPENSSL_VERSION);
+	if (version == NULL)
+		return "unknown libcrypto version";
+	return version;
+}
+
 VCL_STRING
 vmod_version(VRT_CTX)
 {

src/vmod_ece.vcc

@@ -56,6 +56,14 @@ Encryption and HTTP
 
 XXX ...
 
+$Function STRING libcrypto_version()
+
+Return the libcrypto version string.
+
+Example::
+
+  std.log("Using libcrypto version: " + ece.libcrypto_version());
+
 $Function STRING version()
 
 Return the version string for this VMOD.