Add assert() calls to the library.

[meshlink] / src / prf.c

diff --git a/src/prf.c b/src/prf.c
index 499d819694890e353e571b2e487a49f5d7d8c500..3e1b0b54e3162bf27df3eec9d965b1e515d89b79 100644 (file)
--- a/src/prf.c
+++ b/src/prf.c
@@ -23,6 +23,9 @@
 #include "ed25519/sha512.h"
 
 static void memxor(char *buf, char c, size_t len) {
+       assert(buf);
+       assert(len);
+
        for(size_t i = 0; i < len; i++) {
                buf[i] ^= c;
        }
@@ -33,6 +36,9 @@ static void memxor(char *buf, char c, size_t len) {
 // TODO: separate key setup from hmac_sha512
 
 static bool hmac_sha512(const char *key, size_t keylen, const char *msg, size_t msglen, char *out) {
+       assert(msg);
+       assert(msglen);
+
        char tmp[2 * mdlen];
        sha512_context md;
 
@@ -80,6 +86,13 @@ static bool hmac_sha512(const char *key, size_t keylen, const char *msg, size_t
  */
 
 bool prf(const char *secret, size_t secretlen, char *seed, size_t seedlen, char *out, size_t outlen) {
+       assert(secret);
+       assert(secretlen);
+       assert(seed);
+       assert(seedlen);
+       assert(out);
+       assert(outlen);
+
        /* Data is what the "inner" HMAC function processes.
           It consists of the previous HMAC result plus the seed.
         */