1 files changed, 60 insertions, 0 deletions
diff --git a/old_code/keygen.c b/old_code/keygen.c
new file mode 100644
index 0000000..b03b89c
--- /dev/null
+++ b/old_code/keygen.c
@@ -0,0 +1,60 @@
+#include<stdio.h>
+#include<openssl/rand.h>
+#include<unistd.h>
+
+int main(int argc, char* argv[]) {
+
+	int opt;
+	int nbytes = 256;
+	char* defname = "default.key";
+	char* output;
+	int defout = 0;
+	int defbyte = 0;
+	int noopts = 0;
+	while ((opt = getopt(argc, argv, "b:o:")) != -1) {
+		switch (opt) {
+		case 'b':
+			nbytes = atoi(optarg);
+			defbyte = 1;
+			break;
+		case 'o':
+			output = argv[(optind-1)];
+			defout = 1;
+			break;
+		default:
+			fprintf(stderr, "Usage: %s [-b nbytes] [-o output] \n", argv[0]);
+			exit(EXIT_FAILURE);
+		}
+		if (noopts == 0) {
+			noopts = 1;
+		}
+	}
+
+	if(noopts == 0) {
+		printf("WARNING no option specified usign default values... \n");
+	}
+	if (nbytes < 0) {
+		printf("Negative byte value inserted! \n");
+		printf("Exiting... \n");
+		exit(EXIT_FAILURE);
+	} else if (nbytes != 0) {
+		if (defbyte == 0) {
+			printf("No byte number specified... using default value: 256 \n");
+		}
+		unsigned char key[nbytes];
+		RAND_bytes(key, nbytes);
+		if (defout == 0) {
+			output = defname;
+			printf("No output name specified... using default value: default.key \n");
+		}
+		FILE* file = fopen(output, "w");
+		fwrite(key, nbytes, 1, file);
+		fclose(file);
+		printf("Created key file %s of %d bytes \n", output, nbytes);
+	} else {
+		printf("Byte number specified is 0. \n");
+		printf("Doing nothing! \n");
+	}
+
+	exit(EXIT_SUCCESS);
+}