Add assert() calls to the library.

[meshlink] / src / crypto.c

diff --git a/src/crypto.c b/src/crypto.c
index 1bdd8b0745597bd5a35f73bfefa18a7d10db3dca..3244a0b4628bdd2e6ddb6f49dbf1a0c30fab17ad 100644 (file)
--- 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();