Implement meshlink_sign() and _verify().

[meshlink] / test / sign-verify.c

diff --git a/test/sign-verify.c b/test/sign-verify.c
new file mode 100644 (file)
index 0000000..a7f9a5a
--- /dev/null
+++ b/test/sign-verify.c
@@ -0,0 +1,105 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "meshlink.h"
+
+int main(int argc, char *argv[]) {
+       // Open two new meshlink instance.
+
+       meshlink_handle_t *mesh1 = meshlink_open("sign_verify_conf.1", "foo");
+       if(!mesh1) {
+               fprintf(stderr, "Could not initialize configuration for foo\n");
+               return 1;
+       }
+
+       meshlink_handle_t *mesh2 = meshlink_open("sign_verify_conf.2", "bar");
+       if(!mesh2) {
+               fprintf(stderr, "Could not initialize configuration for bar\n");
+               return 1;
+       }
+
+       // Import and export both side's data
+
+       meshlink_add_address(mesh1, "localhost");
+       meshlink_add_address(mesh2, "localhost");
+
+       char *data = meshlink_export(mesh1);
+
+       if(!meshlink_import(mesh2, data)) {
+               fprintf(stderr, "Bar could not import data from foo\n");
+               return 1;
+       }
+
+       free(data);
+
+       data = meshlink_export(mesh2);
+
+       if(!meshlink_import(mesh1, data)) {
+               fprintf(stderr, "Foo could not import data from bar\n");
+               return 1;
+       }
+
+       free(data);
+
+       // Verify that a signature made on one node can be verified by its peer.
+
+       static const char testdata1[] = "Test data 1.";
+       static const char testdata2[] = "Test data 2.";
+
+       char sig[MESHLINK_SIGLEN * 2];
+       size_t siglen = sizeof sig * 2;
+
+       if(!meshlink_sign(mesh1, testdata1, sizeof testdata1, sig, &siglen)) {
+               fprintf(stderr, "Signing failed\n");
+               return 1;
+       }
+       if(siglen != MESHLINK_SIGLEN) {
+               fprintf(stderr, "Signature has unexpected length %zu != %zu\n", siglen, MESHLINK_SIGLEN);
+               return 1;
+       }
+
+       meshlink_node_t *foo = meshlink_get_node(mesh2, "foo");
+       if(!foo) {
+               fprintf(stderr, "Bar did not know about node foo\n");
+               return 1;
+       }
+
+       meshlink_node_t *bar = meshlink_get_node(mesh2, "bar");
+       if(!bar) {
+               fprintf(stderr, "Bar did not know about node bar\n");
+               return 1;
+       }
+
+       if(!meshlink_verify(mesh2, foo, testdata1, sizeof testdata1, sig, siglen)) {
+               fprintf(stderr, "False negative verification\n");
+               return 1;
+       }
+
+       // Check that bad signatures are revoked
+
+       if(meshlink_verify(mesh2, foo, testdata1, sizeof testdata1, sig, siglen / 2)) {
+               fprintf(stderr, "False positive verification with half sized signature\n");
+               return 1;
+       }
+       if(meshlink_verify(mesh2, foo, testdata1, sizeof testdata1, sig, siglen * 2)) {
+               fprintf(stderr, "False positive verification with double sized signature\n");
+               return 1;
+       }
+       if(meshlink_verify(mesh2, foo, testdata2, sizeof testdata2, sig, siglen)) {
+               fprintf(stderr, "False positive verification with wrong data\n");
+               return 1;
+       }
+       if(meshlink_verify(mesh2, bar, testdata1, sizeof testdata1, sig, siglen)) {
+               fprintf(stderr, "False positive verification with wrong signer\n");
+               return 1;
+       }
+
+       // Clean up.
+
+       meshlink_close(mesh2);
+       meshlink_close(mesh1);
+
+       return 0;
+}