tests: test program for signature functions

1 files changed, 101 insertions, 0 deletions

diff --git a/tests/test_signverify.c b/tests/test_signverify.c
new file mode 100644
index 0000000..42ab359
--- /dev/null
+++ b/tests/test_signverify.c
@@ -0,0 +1,101 @@
+#include "../PICA_signverify.h"
+#include <openssl/rand.h>
+#include <openssl/pem.h>
+#include <openssl/x509.h>
+
+#include <stdio.h>
+
+int main(int argc, char **argv)
+{
+	char databuf[512];
+	void* dataptrs[2];
+	int datalengths[2];
+	unsigned char *sig;
+	int siglen;
+	int ret;
+	EVP_PKEY *privkey, *pubkey;
+	FILE *f;
+	X509 *x;
+	RSA *rsa;
+
+	OpenSSL_add_all_algorithms();
+
+	RAND_pseudo_bytes(databuf, sizeof databuf);
+
+	dataptrs[0] = databuf;
+	datalengths[0] = sizeof databuf;
+
+	dataptrs[1] = NULL;
+	datalengths[1] = 0;
+
+	f = fopen(argv[1], "r");
+
+	if (!f)
+	{
+		fprintf(stderr, "failed to open %s\n", argv[1]);
+		return -1;
+	}
+
+	privkey = EVP_PKEY_new();
+
+	x = PEM_read_X509(f, 0, 0, 0);
+
+	if (!x)
+	{
+		fprintf(stderr, "failed to read X.509 cert from file");
+		return -1;
+	}
+
+	//pubkey = x->cert_info->key->pkey;
+	pubkey = X509_get_pubkey(x);
+
+	if (!pubkey)
+	{
+		fprintf(stderr, "no pubkey found");
+	}
+
+	//fclose(f);
+
+	//f = fopen(argv[1], "r");
+
+	rsa = PEM_read_RSAPrivateKey(f, NULL, NULL, NULL);
+	fclose(f);
+
+	if (!rsa)
+	{
+		fprintf(stderr, "failed to read RSA private key from file");
+		return -1;
+	}
+
+	ret = EVP_PKEY_set1_RSA(privkey, rsa);
+
+	ret = PICA_do_signature(privkey, dataptrs, datalengths, &sig, &siglen);
+
+	ret = PICA_signverify(pubkey, dataptrs, datalengths, sig, siglen);
+
+	printf("signature length is %i octets\n", siglen);
+
+	if (ret != 1)
+	{
+		fprintf(stderr, "signature verification failed\n");
+		return -1;
+	}
+
+	databuf[0] += 1;//modify data
+
+	ret = PICA_signverify(pubkey, dataptrs, datalengths, sig, siglen);
+
+	if (ret == 1)
+	{
+		fprintf(stderr, "err signature matched on corrupted data!\n");
+		return -1;
+	}
+
+	free(sig);
+	RSA_free(rsa);
+	EVP_PKEY_free(pubkey);
+	EVP_PKEY_free(privkey);
+	X509_free(x);
+
+	return 0;
+}