add keygen code

1 files changed, 18 insertions, 0 deletions

diff --git a/keygen.c b/keygen.c
new file mode 100644
index 0000000..229e7d9
--- /dev/null
+++ b/keygen.c
@@ -0,0 +1,18 @@
+#include<stdio.h>
+#include<openssl/rand.h>
+#include<limits.h>
+
+int main(int argc, char * argv[]) {
+	long long int len = strtoll(argv[1], NULL, 10);
+	unsigned char key[len];
+	RAND_bytes(key, len);
+	FILE * file = fopen(argv[2],"w");
+	int i;
+	for(i=0; i<len; i++) {
+		fprintf(file,"%c",key[i]);
+	}
+	fclose(file);
+	printf("Created key file %s of %lli bytes \n",argv[2],len);
+
+	return 0;
+}