C++ (Cpp) crypto_encrypt_file Examples

Example #1

File: queue_backend.c Project: 0xkag/OpenSMTPD

int
queue_message_commit(uint32_t msgid)
{
	int	r;
	char	msgpath[PATH_MAX];
	char	tmppath[PATH_MAX];
	FILE	*ifp = NULL;
	FILE	*ofp = NULL;

	profile_enter("queue_message_commit");

	queue_message_path(msgid, msgpath, sizeof(msgpath));

	if (env->sc_queue_flags & QUEUE_COMPRESSION) {
		bsnprintf(tmppath, sizeof tmppath, "%s.comp", msgpath);
		ifp = fopen(msgpath, "r");
		ofp = fopen(tmppath, "w+");
		if (ifp == NULL || ofp == NULL)
			goto err;
		if (! compress_file(ifp, ofp))
			goto err;
		fclose(ifp);
		fclose(ofp);
		ifp = NULL;
		ofp = NULL;

		if (rename(tmppath, msgpath) == -1) {
			if (errno == ENOSPC)
				return (0);
			unlink(tmppath);
			log_warn("rename");
			return (0);
		}
	}

	if (env->sc_queue_flags & QUEUE_ENCRYPTION) {
		bsnprintf(tmppath, sizeof tmppath, "%s.enc", msgpath);
		ifp = fopen(msgpath, "r");
		ofp = fopen(tmppath, "w+");
		if (ifp == NULL || ofp == NULL)
			goto err;
		if (! crypto_encrypt_file(ifp, ofp))
			goto err;
		fclose(ifp);
		fclose(ofp);
		ifp = NULL;
		ofp = NULL;

		if (rename(tmppath, msgpath) == -1) {
			if (errno == ENOSPC)
				return (0);
			unlink(tmppath);
			log_warn("rename");
			return (0);
		}
	}

	r = handler_message_commit(msgid, msgpath);
	profile_leave();

	/* in case it's not done by the backend */
	unlink(msgpath);

	log_trace(TRACE_QUEUE,
	    "queue-backend: queue_message_commit(%08"PRIx32") -> %d",
	    msgid, r);

	return (r);

err:
	if (ifp)
		fclose(ifp);
	if (ofp)
		fclose(ofp);
	return 0;
}

Example #2

File: crypto.c Project: OpenSMTPD/OpenSMTPD

int
main(int argc, char *argv[])
{
	if (argc != 3) {
		printf("usage: crypto <key> <buffer>\n");
		return 1;
	}

	if (!crypto_setup(argv[1], strlen(argv[1]))) {
		printf("crypto_setup failed\n");
		return 1;
	}

	{
		char            encbuffer[4096];
		size_t          enclen;
		char            decbuffer[4096];
		size_t          declen;

		printf("encrypt/decrypt buffer: ");
		enclen = crypto_encrypt_buffer(argv[2], strlen(argv[2]),
					       encbuffer, sizeof encbuffer);

		/* uncomment below to provoke integrity check failure */
		/*
		 * encbuffer[13] = 0x42;
		 * encbuffer[14] = 0x42;
		 * encbuffer[15] = 0x42;
		 * encbuffer[16] = 0x42;
		 */

		declen = crypto_decrypt_buffer(encbuffer, enclen,
					       decbuffer, sizeof decbuffer);
		if (declen != 0 && !strncmp(argv[2], decbuffer, declen))
			printf("ok\n");
		else
			printf("nope\n");
	}

	{
		FILE           *fpin;
		FILE           *fpout;
		printf("encrypt/decrypt file: ");

		fpin = fopen("/etc/passwd", "r");
		fpout = fopen("/tmp/passwd.enc", "w");
		if (!crypto_encrypt_file(fpin, fpout)) {
			printf("encryption failed\n");
			return 1;
		}
		fclose(fpin);
		fclose(fpout);

		/* uncomment below to provoke integrity check failure */
		/*
		 * fpin = fopen("/tmp/passwd.enc", "a");
		 * fprintf(fpin, "borken");
		 * fclose(fpin);
		 */
		fpin = fopen("/tmp/passwd.enc", "r");
		fpout = fopen("/tmp/passwd.dec", "w");
		if (!crypto_decrypt_file(fpin, fpout))
			printf("nope\n");
		else
			printf("ok\n");
		fclose(fpin);
		fclose(fpout);
	}


	return 0;
}