//Function to check message header of ProvMsg4 to determine whether it is valid
//@msg4_header, input the message header of ProvMsg4
//@return AE_SUCCESS if the message header is valid ProvMsg4 or error code if there're any problems
static ae_error_t check_prov_msg4_header(const provision_response_header_t *msg4_header, uint32_t msg4_size)
{
if(msg4_header->protocol != SE_EPID_PROVISIONING || msg4_header->type != TYPE_PROV_MSG4 ||
msg4_header->version != TLV_VERSION_1){
return PVE_INTEGRITY_CHECK_ERROR;
}
uint32_t size_in_header = lv_ntohl(msg4_header->size);
if(size_in_header + PROVISION_RESPONSE_HEADER_SIZE != msg4_size)
return PVE_INTEGRITY_CHECK_ERROR;
return AE_SUCCESS;
}
uint32_t PlatformInfoLogic::latest_psda_svn(const platform_info_blob_wrapper_t* p_platform_info_blob)
{
uint32_t psda_svn = 0;
// value of latest psda svn in platform info blob
if (NULL != p_platform_info_blob && p_platform_info_blob->valid_info_blob)
{
//psda_svn = *((uint32_t*)p_platform_info_blob->platform_info_blob.latest_psda_svn);
const uint32_t* p = reinterpret_cast<const uint32_t*>(p_platform_info_blob->platform_info_blob.latest_psda_svn);
psda_svn = lv_ntohl(*p);
}
SGX_DBGPRINT_ONE_STRING_TWO_INTS_CREATE_SESSION(__FUNCTION__" returning ", psda_svn, psda_svn);
return psda_svn;
}
/*
* An internal function used to sign the EPID signature on the quote body.
* Prefix "emp_" means it is a pointer points memory outside enclave.
*
* For quote with SIG-RL
* |--------------------------------------------------------------------|
* |sgx_quote_t|wrap_key_t|iv|payload_size|basic_sig|rl_ver|n2|nrp..|mac|
* |--------------------------------------------------------------------|
* For quote without SIG-RL
* |--------------------------------------------------------------|
* |sgx_quote_t|wrap_key_t|iv|payload_size|basic_sig|rl_ver|n2|mac|
* |--------------------------------------------------------------|
*
* @param p_epid_context[in] Pointer to the EPID context.
* @param plaintext[in] Reference to the plain text part of EPID blob.
* @param p_basename[in] The pointer to basename.
* @param emp_sig_rl_entries[in] The pointer to SIG-RL entries.
* @param p_sig_rl_header[in] The header of SIG-RL, within EPC.
* @param p_sig_rl_signature[in] The ecdsa signature of SIG-RL, within EPC.
* @param p_enclave_report[in] The input isv report.
* @param p_nonce[in] The input nonce.
* @param p_qe_report[out] The output buffer for qe_report.
* @param emp_quote[out] The output buffer for quote.
* @param p_quote_body[in] The quote body in EPC.
* @param sign_size[in] size of the signature.
* @return ae_error_t AE_SUCCESS for success, otherwise for errors.
*/
static ae_error_t qe_epid_sign(
MemberCtx *p_epid_context,
const se_plaintext_epid_data_sdk_t& plaintext,
const sgx_basename_t *p_basename,
const SigRlEntry *emp_sig_rl_entries,
se_sig_rl_t *p_sig_rl_header,
sgx_ec256_signature_t *p_sig_rl_signature,
const sgx_report_t *p_enclave_report,
const sgx_quote_nonce_t *p_nonce,
sgx_report_t *p_qe_report,
uint8_t *emp_quote,
const sgx_quote_t *p_quote_body,
uint32_t sign_size)
{
ae_error_t ret = AE_SUCCESS;
sgx_status_t se_ret = SGX_SUCCESS;
EpidStatus epid_ret = kEpidNoErr;
se_wrap_key_t wrap_key;
BasicSignature basic_sig;
BasicSignature encrypted_basic_sig;
uint8_t aes_iv[QUOTE_IV_SIZE] = {0};
uint8_t aes_key[QE_AES_KEY_SIZE] = {0};
uint8_t aes_tag[SGX_SEAL_TAG_SIZE] = {0};
sgx_report_data_t qe_report_data = {{0}};
sgx_target_info_t report_target;
sgx_ec256_public_t ec_pub_key; // little endian
se_ae_ecdsa_hash_t sig_rl_hash = {{0}};
uint8_t ecc_result = SGX_EC_INVALID_SIGNATURE;
sgx_sha_state_handle_t sha_context = NULL;
sgx_sha_state_handle_t sha_quote_context = NULL;
sgx_aes_state_handle_t aes_gcm_state = NULL;
void *pub_key = NULL;
size_t pub_key_size = 0;
uint8_t* pub_key_buffer = NULL;
sgx_ecc_state_handle_t ecc_handle = NULL;
memset(&wrap_key, 0, sizeof(wrap_key));
memset(&basic_sig, 0, sizeof(basic_sig));
memset(&encrypted_basic_sig, 0, sizeof(encrypted_basic_sig));
memset(&report_target, 0, sizeof(report_target));
memset(&ec_pub_key, 0, sizeof(ec_pub_key));
se_encrypted_sign_t *emp_p = (se_encrypted_sign_t *)
(((sgx_quote_t *)emp_quote)->signature);
uint8_t* emp_nr = NULL;
uint32_t match = FALSE;
/* Sign the quote body and get the basic signature*/
epid_ret = EpidSignBasic(p_epid_context,
(uint8_t *)const_cast<sgx_quote_t *>(p_quote_body),
(uint32_t)QE_QUOTE_BODY_SIZE,
(uint8_t *)const_cast<sgx_basename_t *>(p_basename),
sizeof(*p_basename),
&basic_sig,
NULL); //Random basename, can be NULL if basename is provided
if(kEpidNoErr != epid_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
/* Prepare the context for SHA256 of quote. */
if(p_qe_report)
{
se_ret = sgx_sha256_init(&sha_quote_context);
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
// Update hash for nonce.
se_ret = sgx_sha256_update((uint8_t *)const_cast<sgx_quote_nonce_t *>(p_nonce),
sizeof(*p_nonce),
sha_quote_context);
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
// Update hash for the first part of quote.
se_ret = sgx_sha256_update((uint8_t *)const_cast<sgx_quote_t *>(p_quote_body),
sizeof(*p_quote_body),
sha_quote_context);
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
}
/* Prepare the context for SHA256 and start calculate the hash of header
* of SIG-RL. */
if(emp_sig_rl_entries)
{
se_ret = sgx_sha256_init(&sha_context);
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
/* Calculate the hash of SIG-RL header. */
se_ret = sgx_sha256_update((uint8_t *)p_sig_rl_header,
(uint32_t)(sizeof(se_sig_rl_t) - sizeof(SigRlEntry)),
sha_context);
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
}
// Start encrypt the signature.
/* Get the random wrap key */
se_ret = sgx_read_rand(aes_key, sizeof(aes_key));
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
/* Copy the hash of wrap key into output buffer. */
se_static_assert(sizeof(wrap_key.key_hash) == sizeof(sgx_sha256_hash_t));
se_ret = sgx_sha256_msg(aes_key, sizeof(aes_key),
(sgx_sha256_hash_t *)wrap_key.key_hash);
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
/* Start encrypt the wrap key by RSA algorithm. */
se_ret = sgx_create_rsa_pub1_key(sizeof(g_qsdk_pub_key_n),
sizeof(g_qsdk_pub_key_e),
(const unsigned char *)g_qsdk_pub_key_n,
(const unsigned char *)g_qsdk_pub_key_e,
&pub_key);
if(se_ret != SGX_SUCCESS)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
/* Get output buffer size */
se_ret = sgx_rsa_pub_encrypt_sha256(pub_key, NULL, &pub_key_size, aes_key, sizeof(aes_key));
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
se_ret = sgx_rsa_pub_encrypt_sha256(pub_key, wrap_key.encrypted_key, &pub_key_size, aes_key, sizeof(aes_key));
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
/* Create the random AES IV. */
se_ret = sgx_read_rand(aes_iv, sizeof(aes_iv));
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
/* Copy the wrap_key_t into output buffer. */
memcpy(&emp_p->wrap_key, &wrap_key, sizeof(wrap_key));
/* Copy the AES IV into output buffer. */
memcpy(&emp_p->iv, aes_iv, sizeof(aes_iv));
/* Copy the AES Blob payload size into output buffer. */
memcpy(&emp_p->payload_size, &sign_size, sizeof(sign_size));
se_ret = sgx_aes_gcm128_enc_init(
aes_key,
aes_iv, //input initial vector. randomly generated value and encryption of different msg should use different iv
sizeof(aes_iv), //length of initial vector, usually IV_SIZE
NULL,//AAD of AES-GCM, it could be NULL
0, //length of bytes of AAD
&aes_gcm_state);
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
memset_s(aes_key, sizeof(aes_key), 0, sizeof(aes_key));
/* Encrypt the basic signature. */
se_ret = sgx_aes_gcm128_enc_update(
(uint8_t *)&basic_sig, //start address to data before/after encryption
sizeof(basic_sig),
(uint8_t *)&encrypted_basic_sig, //length of data
aes_gcm_state); //pointer to a state
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
/* Copy the encrypted basic signature into output buffer. */
memcpy(&emp_p->basic_sign, &encrypted_basic_sig,
sizeof(encrypted_basic_sig));
if(p_qe_report)
{
se_ret = sgx_sha256_update((uint8_t *)&wrap_key,
sizeof(wrap_key),
sha_quote_context);
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
se_ret = sgx_sha256_update(aes_iv,
sizeof(aes_iv),
sha_quote_context);
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
se_ret = sgx_sha256_update((uint8_t *)&sign_size,
sizeof(sign_size),
sha_quote_context);
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
se_ret = sgx_sha256_update((uint8_t *)&encrypted_basic_sig,
sizeof(encrypted_basic_sig),
sha_quote_context);
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
}
/* Start process the SIG-RL. */
if(emp_sig_rl_entries)
{
unsigned int entry_count = 0;
unsigned int i = 0;
RLver_t encrypted_rl_ver = {{0}};
RLCount encrypted_n2 = {{0}};
entry_count = lv_ntohl(p_sig_rl_header->sig_rl.n2);//entry count for big endian to little endian
// Continue encrypt the output
se_ret = sgx_aes_gcm128_enc_update(
(uint8_t *)&(p_sig_rl_header->sig_rl.version), //start address to data before/after encryption
sizeof(p_sig_rl_header->sig_rl.version),
(uint8_t *)&encrypted_rl_ver, //length of data
aes_gcm_state); //pointer to a state
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
se_ret = sgx_aes_gcm128_enc_update(
(uint8_t *)&(p_sig_rl_header->sig_rl.n2), //start address to data before/after encryption
sizeof(p_sig_rl_header->sig_rl.n2),
(uint8_t *)&encrypted_n2, //length of data
aes_gcm_state); //pointer to a state
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
memcpy(&(emp_p->rl_ver), &encrypted_rl_ver,
sizeof(encrypted_rl_ver));
memcpy(&(emp_p->rl_num), &encrypted_n2,
sizeof(encrypted_n2));
if(p_qe_report)
{
se_ret = sgx_sha256_update((uint8_t *)&encrypted_rl_ver,
sizeof(encrypted_rl_ver),
sha_quote_context);
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
se_ret = sgx_sha256_update((uint8_t *)&encrypted_n2,
sizeof(encrypted_n2),
sha_quote_context);
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
}
/* Start process the SIG-RL entries one by one. */
emp_nr = emp_p->nrp_mac;
for (i = 0; i < entry_count; i++, emp_nr += sizeof(NrProof))
{
/* Generate non-revoke prove one by one. */
SigRlEntry entry;
NrProof temp_nr;
NrProof encrypted_temp_nr;
memcpy(&entry, emp_sig_rl_entries + i, sizeof(entry));
memset_s(&temp_nr, sizeof(temp_nr), 0, sizeof(temp_nr));
memset_s(&encrypted_temp_nr, sizeof(encrypted_temp_nr), 0, sizeof(encrypted_temp_nr));
epid_ret = EpidNrProve(p_epid_context,
(uint8_t *)const_cast<sgx_quote_t *>(p_quote_body),
(uint32_t)QE_QUOTE_BODY_SIZE,
(uint8_t *)const_cast<sgx_basename_t *>(p_basename), // basename is required, otherwise it will return kEpidBadArgErr
sizeof(*p_basename),
&basic_sig, // Basic signature with 'b' and 'k' in it
&entry, //Single entry in SigRl composed of 'b' and 'k'
&temp_nr); // The generated non-revoked proof
if(kEpidNoErr != epid_ret)
{
if(kEpidSigRevokedInSigRl == epid_ret)
match = TRUE;
else
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
}
/* Update the hash of SIG-RL */
se_ret = sgx_sha256_update((uint8_t *)&entry,
sizeof(entry), sha_context);
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
se_ret = sgx_aes_gcm128_enc_update(
(uint8_t *)&temp_nr, //start address to data before/after encryption
sizeof(encrypted_temp_nr),
(uint8_t *)&encrypted_temp_nr, //length of data
aes_gcm_state); //pointer to a state
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
memcpy(emp_nr, &encrypted_temp_nr, sizeof(encrypted_temp_nr));
if(p_qe_report)
{
se_ret = sgx_sha256_update((uint8_t *)&encrypted_temp_nr,
sizeof(encrypted_temp_nr),
sha_quote_context);
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
}
}
/* Get the final hash of the whole SIG-RL. */
se_ret = sgx_sha256_get_hash(sha_context,
(sgx_sha256_hash_t *)&sig_rl_hash.hash);
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
/* Verify the integrity of SIG-RL by check ECDSA signature. */
se_static_assert(sizeof(ec_pub_key) == sizeof(plaintext.epid_sk));
// Both plaintext.epid_sk and ec_pub_key are little endian
memcpy(&ec_pub_key, plaintext.epid_sk, sizeof(ec_pub_key));
se_ret = sgx_ecc256_open_context(&ecc_handle);
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
// sgx_ecdsa_verify_hash will take ec_pub_key as little endian
se_ret = sgx_ecdsa_verify_hash((uint8_t*)&(sig_rl_hash.hash),
(const sgx_ec256_public_t *)&ec_pub_key,
p_sig_rl_signature,
&ecc_result,
ecc_handle);
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
else if(SGX_EC_VALID != ecc_result)
{
ret = QE_SIGRL_ERROR;
goto CLEANUP;
}
else if(match)
{
ret = QE_REVOKED_ERROR;
goto CLEANUP;
}
}
else
{
se_static_assert(sizeof(emp_p->rl_ver) == sizeof(RLver_t));
se_static_assert(sizeof(emp_p->rl_num) == sizeof(RLCount));
uint8_t temp_buf[sizeof(RLver_t) + sizeof(RLCount)] = {0};
uint8_t encrypted_temp_buf[sizeof(temp_buf)] = {0};
se_ret = sgx_aes_gcm128_enc_update(
(uint8_t *)&temp_buf, //start address to data before/after encryption
sizeof(encrypted_temp_buf),
(uint8_t *)&encrypted_temp_buf, //length of data
aes_gcm_state); //pointer to a state
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
/* This will copy both encrypted rl_ver and encrypted rl_num into
Output buffer. */
memcpy(&emp_p->rl_ver, &encrypted_temp_buf,
sizeof(encrypted_temp_buf));
if(p_qe_report)
{
se_ret = sgx_sha256_update((uint8_t *)&encrypted_temp_buf,
sizeof(encrypted_temp_buf),
sha_quote_context);
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
}
}
se_ret = sgx_aes_gcm128_enc_get_mac(aes_tag, aes_gcm_state);
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
memcpy((uint8_t *)&(emp_p->basic_sign) + sign_size, &aes_tag,
sizeof(aes_tag));
if(p_qe_report)
{
se_ret = sgx_sha256_update(aes_tag, sizeof(aes_tag),
sha_quote_context);
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
se_ret = sgx_sha256_get_hash(sha_quote_context,
(sgx_sha256_hash_t *)&qe_report_data);
if(SGX_SUCCESS != se_ret)
{
ret = QE_UNEXPECTED_ERROR;
goto CLEANUP;
}
memcpy(&(report_target.attributes),
&(((const sgx_report_t *)p_enclave_report)->body.attributes),
sizeof(report_target.attributes));
memcpy(&(report_target.mr_enclave),
&(((const sgx_report_t *)p_enclave_report)->body.mr_enclave),
sizeof(report_target.mr_enclave));
memcpy(&(report_target.misc_select),
&(((const sgx_report_t *)p_enclave_report)->body.misc_select),
sizeof(report_target.misc_select));
se_ret = sgx_create_report(&report_target, &qe_report_data, p_qe_report);
if(SGX_SUCCESS != se_ret)
{
ret = QE_PARAMETER_ERROR;
goto CLEANUP;
}
}
CLEANUP:
memset_s(aes_key, sizeof(aes_key), 0, sizeof(aes_key));
sgx_sha256_close(sha_context);
sgx_sha256_close(sha_quote_context);
if (aes_gcm_state)
sgx_aes_gcm_close(aes_gcm_state);
if (pub_key)
sgx_free_rsa_key(pub_key, SGX_RSA_PUBLIC_KEY, sizeof(plaintext.qsdk_mod), sizeof(plaintext.qsdk_exp));
if (pub_key_buffer)
free(pub_key_buffer);
if (ecc_handle)
sgx_ecc256_close_context(ecc_handle);
return ret;
}
//Function to create data for ProvMsg3 generation
// The sigrl of ProvMsg2 will processed in this function in piece-meal method
//@msg2_blob_input: structure to hold decoded data of ProvMsg2
//@performance_rekey_used[in]: 1 if performance rekey used or 0 if not
//@msg3_parm: structure to hold most information to generate ProvMsg3
//@msg3_output: structure to hold output data to create ProvMsg3
//@emp_epid_sig: output buffer to external memory for variable length EpidSignature
//@epid_sig_buffer_size: size in bytes of buffer emp_epid_sig
//@return PVEC_SUCCESS on success and error code if failed
pve_status_t gen_prov_msg3_data(const proc_prov_msg2_blob_input_t *msg2_blob_input,
prov_msg3_parm_t& msg3_parm,
uint8_t performance_rekey_used,
gen_prov_msg3_output_t *msg3_output,
external_memory_byte_t *emp_epid_sig,
uint32_t epid_sig_buffer_size)
{
pve_status_t ret = PVEC_SUCCESS;
sgx_status_t sgx_status = SGX_ERROR_UNEXPECTED;
uint8_t temp_buf[JOIN_PROOF_TLV_TOTAL_SIZE];
uint8_t *data_to_encrypt = NULL;
uint8_t size_to_encrypt = 0;
uint8_t pwk2_tlv_buffer[PWK2_TLV_TOTAL_SIZE];
sgx_key_128bit_t *pwk2=reinterpret_cast<sgx_key_128bit_t *>(pwk2_tlv_buffer+PWK2_TLV_HEADER_SIZE);
uint8_t report_data_payload[MAC_SIZE + HARD_CODED_JOIN_PROOF_WITH_ESCROW_TLV_SIZE + NONCE_2_SIZE + PEK_MOD_SIZE];
uint8_t* pdata = &report_data_payload[0];
sgx_report_data_t report_data = { 0 };
uint8_t aad[sizeof(GroupId)+sizeof(device_id_t)+CHALLENGE_NONCE_SIZE];
void *pub_key = NULL;
const signed_pek_t& pek = msg2_blob_input->pek;
uint32_t le_e;
int i;
size_t output_len = 0;
uint8_t le_n[sizeof(pek.n)];
static_assert(sizeof(pek.n)==384, "pek.n should be 384 bytes");
device_id_t *device_id_in_aad= (device_id_t *)(aad+sizeof(GroupId));
join_proof_with_escrow_t* join_proof_with_escrow=reinterpret_cast<join_proof_with_escrow_t *>(temp_buf+JOIN_PROOF_TLV_HEADER_SIZE);
se_static_assert(sizeof(join_proof_with_escrow_t)+JOIN_PROOF_TLV_HEADER_SIZE==JOIN_PROOF_TLV_TOTAL_SIZE); /*unmatched hardcoded size*/
se_static_assert(sizeof(sgx_key_128bit_t)==PWK2_TLV_TOTAL_SIZE-PWK2_TLV_HEADER_SIZE); /*unmatched PWK2 size*/
memset(temp_buf, 0 ,sizeof(temp_buf));
memset(aad, 0, sizeof(aad));
memset(pwk2, 0, sizeof(sgx_key_128bit_t));
memcpy(pwk2_tlv_buffer, PWK2_TLV_HEADER, PWK2_TLV_HEADER_SIZE);
msg3_output->is_join_proof_generated=false;
msg3_output->is_epid_sig_generated=false;
if ((msg2_blob_input->pce_target_info.attributes.flags & SGX_FLAGS_PROVISION_KEY) != SGX_FLAGS_PROVISION_KEY ||
(msg2_blob_input->pce_target_info.attributes.flags & SGX_FLAGS_DEBUG) != 0){
//PCE must have access to provisioning key
//Can't be debug PCE
ret = PVEC_PARAMETER_ERROR;
goto ret_point;
}
if(!performance_rekey_used){
//the temp_buf used for join_proof_with_escrow tlv
memcpy(temp_buf, JOIN_PROOF_TLV_HEADER, JOIN_PROOF_TLV_HEADER_SIZE);//first copy in tlv header
ret = random_stack_advance(gen_msg3_join_proof_escrow_data, msg2_blob_input, *join_proof_with_escrow);//generate the tlv payload
if( PVEC_SUCCESS != ret )
goto ret_point;
msg3_output->is_join_proof_generated = true;
data_to_encrypt = temp_buf;
size_to_encrypt = JOIN_PROOF_TLV_TOTAL_SIZE;
}
//now encrypt field1
ret = se_read_rand_error_to_pve_error(sgx_read_rand(msg3_output->field1_iv, IV_SIZE));//randomly generate IV
if( PVEC_SUCCESS != ret)
goto ret_point;
memcpy(aad, &msg2_blob_input->group_cert.key.gid,sizeof(GroupId));//start to prepare AAD
memcpy(&device_id_in_aad->fmsp, &msg2_blob_input->equiv_pi.fmsp, sizeof(fmsp_t));
memcpy(&device_id_in_aad->psvn.cpu_svn, &msg2_blob_input->equiv_pi.cpu_svn, sizeof(sgx_cpu_svn_t));
memcpy(&device_id_in_aad->psvn.isv_svn, &msg2_blob_input->equiv_pi.pve_svn, sizeof(sgx_isv_svn_t));
memset(&device_id_in_aad->ppid, 0, sizeof(device_id_in_aad->ppid));
ret = pve_rng_generate(NONCE_2_SIZE*8, msg3_output->n2);
if(PVEC_SUCCESS !=ret){
goto ret_point;
}
ret = random_stack_advance(get_pwk2, &device_id_in_aad->psvn, msg3_output->n2, pwk2);
if( PVEC_SUCCESS != ret )
goto ret_point;
memcpy(aad+sizeof(GroupId)+sizeof(device_id_t), msg2_blob_input->challenge_nonce, CHALLENGE_NONCE_SIZE);
se_static_assert(sizeof(sgx_aes_gcm_128bit_key_t)==SK_SIZE); /*sizeof sgx_aes_gcm_128bit_key_t should be same as TCB size*/
se_static_assert(sizeof(sgx_aes_gcm_128bit_tag_t)==MAC_SIZE); /*sizeof sgx_aes_gcm_128bit_tag_t should be same as MAC_SIZE*/
sgx_status = sgx_rijndael128GCM_encrypt(reinterpret_cast<const sgx_aes_gcm_128bit_key_t *>(pwk2),
data_to_encrypt, size_to_encrypt, msg3_output->field1_data,
msg3_output->field1_iv, IV_SIZE, aad, static_cast<uint32_t>(sizeof(GroupId)+sizeof(device_id_t)+CHALLENGE_NONCE_SIZE),
reinterpret_cast<sgx_aes_gcm_128bit_tag_t *>(msg3_output->field1_mac));//encrypt field1
if(SGX_SUCCESS != sgx_status){
ret = sgx_error_to_pve_error(sgx_status);
goto ret_point;
}
if( msg2_blob_input->is_previous_pi_provided ){
//preparing the encryption state of ProvMsg3 and encrypt inplace of msg3_inside enclave (field1_0 and field1_1)
//The function will randomly set the iv value too
ret = proc_msg3_state_init(&msg3_parm, pwk2);
if( PVEC_SUCCESS!=ret )
goto ret_point;
//Now start piece-meal generation of EPIDsign
ret = gen_msg3_signature(msg2_blob_input, &msg3_parm, emp_epid_sig, epid_sig_buffer_size);
if( PVEC_SUCCESS!=ret )
goto ret_point;
msg3_output->is_epid_sig_generated = true;
msg3_output->epid_sig_output_size = epid_sig_buffer_size;
memcpy(msg3_output->epid_sig_iv, msg3_parm.iv, IV_SIZE);
//generate MAC in EPC
ret = sgx_error_to_pve_error(sgx_aes_gcm128_enc_get_mac(msg3_output->epid_sig_mac, (sgx_aes_state_handle_t*)msg3_parm.p_msg3_state));
if (PVEC_SUCCESS != ret)
goto ret_point;
}
le_e = lv_ntohl(pek.e);
se_static_assert(sizeof(pek.n)==sizeof(le_n)); /*unmatched size of pek.n*/
//endian swap
for(i=0;i<(int)(sizeof(pek.n)/sizeof(pek.n[0]));i++){
le_n[i]=pek.n[sizeof(pek.n)/sizeof(pek.n[0])-i-1];
}
sgx_status = sgx_create_rsa_pub_key(sizeof(pek.n), sizeof(pek.e),
reinterpret_cast<const unsigned char *>(le_n), reinterpret_cast<const unsigned char *>(&le_e), &pub_key);
if (SGX_SUCCESS != sgx_status) {
ret = sgx_error_to_pve_error(sgx_status);
goto ret_point;
}
sgx_status = sgx_rsa_pub_encrypt_sha256(pub_key, NULL, &output_len, reinterpret_cast<const unsigned char*>(pwk2_tlv_buffer),
PWK2_TLV_TOTAL_SIZE);
if (SGX_SUCCESS != sgx_status) {
ret = sgx_error_to_pve_error(sgx_status);
goto ret_point;
}
sgx_status = sgx_rsa_pub_encrypt_sha256(pub_key, msg3_output->encrypted_pwk2, &output_len, reinterpret_cast<const unsigned char*>(pwk2_tlv_buffer),
PWK2_TLV_TOTAL_SIZE);
if (SGX_SUCCESS != sgx_status) {
ret = sgx_error_to_pve_error(sgx_status);
goto ret_point;
}
// X = (NT)MAC_PWK2(... (NT)E_PWK2((T)(JoinP, f)) ...) | (NT)E_PWK2((T)(JoinP, f)) | (NT)PWK2N | (NT)E_PEK((T)PWK2)
// REPORT.ReportData == SHA256[X]
memcpy(pdata, msg3_output->field1_mac, MAC_SIZE);
pdata += MAC_SIZE;
if (!performance_rekey_used){
memcpy(pdata, msg3_output->field1_data, HARD_CODED_JOIN_PROOF_WITH_ESCROW_TLV_SIZE);
pdata += HARD_CODED_JOIN_PROOF_WITH_ESCROW_TLV_SIZE;
}
memcpy(pdata, msg3_output->n2, NONCE_2_SIZE);
pdata += NONCE_2_SIZE;
memcpy(pdata, msg3_output->encrypted_pwk2, PEK_MOD_SIZE);
pdata += PEK_MOD_SIZE;
se_static_assert(sizeof(report_data) >= sizeof(sgx_sha256_hash_t)); /*report data is no large enough*/
sgx_status = sgx_sha256_msg(report_data_payload, (uint32_t)(pdata - &report_data_payload[0]), reinterpret_cast<sgx_sha256_hash_t *>(&report_data));
if (SGX_SUCCESS != sgx_status){
ret = sgx_error_to_pve_error(sgx_status);
goto ret_point;
}
sgx_status = sgx_create_report(&msg2_blob_input->pce_target_info, &report_data, &msg3_output->pwk2_report);
if (SGX_SUCCESS != sgx_status){
ret = sgx_error_to_pve_error(sgx_status);
goto ret_point;
}
ret_point:
(void)memset_s(aad, sizeof(aad), 0, sizeof(aad));
(void)memset_s(temp_buf, sizeof(temp_buf), 0, sizeof(temp_buf));
(void)memset_s(pwk2_tlv_buffer, sizeof(pwk2_tlv_buffer),0,sizeof(pwk2_tlv_buffer));
if(pub_key){
sgx_free_rsa_key(pub_key, SGX_RSA_PUBLIC_KEY, sizeof(pek.n), sizeof(pek.e));
}
return ret;
}
