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https://github.com/matter-labs/vault-auth-tee.git
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db00c91030
downgrade from `not production ready` to `use at your own risc` Signed-off-by: Harald Hoyer <harald@matterlabs.dev>
98 lines
No EOL
3.6 KiB
Markdown
98 lines
No EOL
3.6 KiB
Markdown
# vault-auth-tee
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TEE remote attestation plugin for Hashicorp Vault
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## Disclaimer
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This plugin has not yet received an audit. Use at your own risk.
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## License
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All of the code is licensed under the Mozilla Public License 2.0 unless otherwise specified.
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Most of the vault plugin code is based on the vault `builtin/credential/cert` plugin.
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## Build Setup
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```bash
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$ wget -qO - https://download.01.org/intel-sgx/sgx_repo/ubuntu/intel-sgx-deb.key | sudo apt-key add -
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$ sudo bash -c 'echo "deb [arch=amd64] https://download.01.org/intel-sgx/sgx_repo/ubuntu focal main" > /etc/apt/sources.list.d/intel-sgx.list'
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$ sudo apt update
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$ sudo apt install -y --no-install-recommends \
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libsgx-headers \
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libsgx-enclave-common \
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libsgx-urts \
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libsgx-dcap-quote-verify \
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libsgx-dcap-quote-verify-dev
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```
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## Configuration
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`Create` or `Update` via the `${plugin}/tees/$name` endpoint
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```json
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{
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"name": "TEE_role_name",
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"token_policies": "policy1,policy2,...",
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"types": "sgx",
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"sgx_mrsigner": "298037d88782e022e019b3020745b78aa40ed95c77da4bf7f3253d3a44c4fd7e",
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"sgx_mrenclave": "18946b3547d3ca036f4df7b516857e28fd512d69fed3411dc660537912faabf8",
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"sgx_isv_prodid": 0,
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"sgx_min_isv_svn": 0,
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"sgx_allowed_tcb_levels": "Ok,ConfigNeeded,OutOfDate,OutOfDateConfigNeeded,SwHardeningNeeded,ConfigAndSwHardeningNeeded"
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}
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```
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* At least one of `sgx_mrsigner` or `sgx_mrenclave` must be set. If both are set, both are used for matching.
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* `sgx_isv_prodid` is optional and defaults to `0`.
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* `sgx_min_isv_svn` is optional and defaults to `0`.
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* `sgx_allowed_tcb_levels` is optional and defaults to `Ok`.
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## Authentication
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- Client TEE generates a self-signed TLS client certificate
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- Client TEE generates an attestation report, which includes the hash of the public key of the client certificate (in case of SGX, a sha256 sum of the public key)
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- Client TEE fetches all collateral material via e.g. Intel DCAP ([`tee_qv_get_collateral`](https://github.com/intel/SGXDataCenterAttestationPrimitives/blob/4cb5c8b81f126f9aa3ee921d7980a909a9bd676d/QuoteVerification/dcap_quoteverify/inc/sgx_dcap_quoteverify.h#L234-L238))
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- Client TEE sends POST request with a TLS connection using the client certificate
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to Vault via the `${plugin}/login` endpoint with the name, attestation report and the attestation collateral material
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- An optional challenge can be included in the POST request, which is then included in the attestation report of the vault response
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```json
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{
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"name": "The name of the TEE role to authenticate against.",
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"quote": "The quote Base64 encoded.",
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"collateral": "The collateral Json string encoded.",
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"challenge": "An optional challenge hex encoded."
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}
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```
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The response contains the Vault token and, if a challenge was included,
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the vault attestation report, which must contain the challenge bytes in the report_data of the quote.
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```json
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{
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"auth": {
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"client_token": "The Vault token.",
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"....": "...."
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},
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"data": {
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"quote": "The vault quote Base64 encoded.",
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"collateral": "The vault collateral Json string encoded."
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}
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}
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```
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### Collateral Json encoding
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See [sgx_ql_lib_common.h](https://github.com/intel/SGXDataCenterAttestationPrimitives/blob/4cb5c8b81f126f9aa3ee921d7980a909a9bd676d/QuoteGeneration/quote_wrapper/common/inc/sgx_ql_lib_common.h#L202-L227)
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```json
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{
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"major_version": uint16,
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"minor_version": uint16,
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"tee_type": uint32,
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"pck_crl_issuer_chain": []byte,
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"root_ca_crl": []byte,
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"pck_crl": []byte,
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"tcb_info_issuer_chain": []byte,
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"tcb_info": []byte,
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"qe_identity_issuer_chain": []byte,
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"qe_identity": []byte
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}
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``` |