171     std::string* parameter) {  in EncryptCommandParameter()  argument
172   CHECK(parameter);  in EncryptCommandParameter()
181   if (parameter->size() > kTpmBufferSize) {  in EncryptCommandParameter()
187   AesOperation(parameter, caller_nonce_, tpm_nonce_, AES_ENCRYPT);  in EncryptCommandParameter()
192     std::string* parameter) {  in DecryptResponseParameter()  argument
193   CHECK(parameter);  in DecryptResponseParameter()
202   if (parameter->size() > kTpmBufferSize) {  in DecryptResponseParameter()
206   AesOperation(parameter, tpm_nonce_, caller_nonce_, AES_DECRYPT);  in DecryptResponseParameter()
282 void HmacAuthorizationDelegate::AesOperation(std::string* parameter,  in AesOperation()  argument
299   AES_cfb128_encrypt(reinterpret_cast<const unsigned char*>(parameter->data()),  in AesOperation()
300                      decrypted, parameter->size(), &key, aes_iv, &iv_offset,  in AesOperation()
302   memcpy(string_as_array(parameter), decrypted, parameter->size());  in AesOperation()