Add check for packets missing a nonce

2022-02-02 23:12:08 +00:00 · 2022-02-02 23:12:08 +00:00 · 1a45c11dfb
parent c7375ad44b
commit 1a45c11dfb
1 changed files with 5 additions and 0 deletions
--- a/Romulus-M/encrypt_wrapper.c
+++ b/Romulus-M/encrypt_wrapper.c
@ -125,6 +125,11 @@ int decrypt(packetEx *packet, unsigned char *inBuf, UINT16 len, unsigned char *k
    // n = nonce, CRYPTO_NPUBBYTES size 16
    unsigned char *npub = &inBuf[loc];
    loc += CRYPTO_NPUBBYTES;
+    
+    if ((len - loc) < 0 )
+    {
+        return 1;
+    }

    // ciphertext - in, MAX 16 bytes larger than plaintext - defined as CRYPTO_ABYTES
    int clen = len - loc;