42     ae_ctx* get() { return ctx_; }  in get()  function in keymaster::AeCtx
56     if (!derivation_data->get())  in BuildDerivationData()
59     uint8_t* buf = derivation_data->get();  in BuildDerivationData()
60     uint8_t* end = derivation_data->get() + *derivation_data_length;  in BuildDerivationData()
82     if (!hash_buf.get())  in InitializeKeyWrappingContext()
84     Eraser hash_eraser(hash_buf.get(), SHA256_DIGEST_LENGTH);  in InitializeKeyWrappingContext()
86     if (!derived_key.get())  in InitializeKeyWrappingContext()
88     Eraser derived_key_eraser(derived_key.get(), AES_BLOCK_SIZE);  in InitializeKeyWrappingContext()
90     if (!ctx->get() || !hash_buf.get() || !derived_key.get())  in InitializeKeyWrappingContext()
96     SHA256_Update(&sha256_ctx, derivation_data.get(), derivation_data_length);  in InitializeKeyWrappingContext()
97     SHA256_Final(hash_buf.get(), &sha256_ctx);  in InitializeKeyWrappingContext()
106     AES_encrypt(hash_buf.get(), derived_key.get(), &aes_key);  in InitializeKeyWrappingContext()
109     if (ae_init(ctx->get(), derived_key.get(), AES_BLOCK_SIZE /* key length */, OCB_NONCE_LENGTH,  in InitializeKeyWrappingContext()
111         memset_s(ctx->get(), 0, ae_ctx_sizeof());  in InitializeKeyWrappingContext()
129     if (!ctx.get())  in OcbEncryptKey()
140     int ae_err = ae_encrypt(ctx.get(), nonce.peek_read(), plaintext.key_material,  in OcbEncryptKey()
165     if (!ctx.get())  in OcbDecryptKey()
176     int ae_err = ae_decrypt(ctx.get(), nonce.peek_read(), ciphertext.key_material,  in OcbDecryptKey()