Return meaningful value from manual cng pbkdf2

Author: Julia-Garland

src/libmongoc/src/mongoc/mongoc-crypto-cng.c

@@ -212,11 +212,16 @@ _bcrypt_derive_key_pbkdf2 (BCRYPT_ALG_HANDLE algorithm,
    start_key[salt_len + 2] = 0;
    start_key[salt_len + 3] = 1;
 
-   _mongoc_crypto_cng_hmac_or_hash (algorithm, password, password_len, start_key, hash_size, output);
+   if (!_mongoc_crypto_cng_hmac_or_hash (algorithm, password, password_len, start_key, hash_size, output)) {
+      return false;
+   }
    memcpy (intermediate_digest, output, hash_size);
 
    for (uint32_t i = 2u; i <= iterations; i++) {
-      _mongoc_crypto_cng_hmac_or_hash (algorithm, password, password_len, intermediate_digest, hash_size, output);
+      if (!_mongoc_crypto_cng_hmac_or_hash (
+             algorithm, password, password_len, intermediate_digest, hash_size, output)) {
+         return false;
+      }
 
       for (int k = 0; k < hash_size; k++) {
          output[k] ^= intermediate_digest[k];