X-Git-Url: http://git.meshlink.io/?p=meshlink;a=blobdiff_plain;f=src%2Fcrypto.c;h=3244a0b4628bdd2e6ddb6f49dbf1a0c30fab17ad;hp=1bdd8b0745597bd5a35f73bfefa18a7d10db3dca;hb=963c5055505f2fc117cd5efa06eaa02c9b2bf85d;hpb=dc0e52cb3e42620c3139e713b373d130aa30b698

diff --git a/src/crypto.c b/src/crypto.c
index 1bdd8b07..3244a0b4 100644
--- a/src/crypto.c
+++ b/src/crypto.c
@@ -28,6 +28,8 @@
 static int random_fd = -1;
 
 void crypto_init(void) {
+	assert(random_fd == -1);
+
 	random_fd = open("/dev/urandom", O_RDONLY);
 
 	if(random_fd < 0) {
@@ -41,10 +43,15 @@ void crypto_init(void) {
 }
 
 void crypto_exit(void) {
+	assert(random_fd != -1);
+
 	close(random_fd);
+	random_fd = -1;
 }
 
 void randomize(void *out, size_t outlen) {
+	assert(outlen);
+
 	char *ptr = out;
 
 	while(outlen) {
@@ -81,6 +88,8 @@ void crypto_exit(void) {
 }
 
 void randomize(void *out, size_t outlen) {
+	assert(outlen);
+
 	if(!CryptGenRandom(prov, outlen, out)) {
 		fprintf(stderr, "CryptGenRandom() failed\n");
 		abort();