2725f53ef5
* Initial WIP. * Configure IAS host via system properties. * Create separate Gretty configurations for testing and for IAS. * (WIP) Separate configuration values from WAR; Add msg3 -> msg4 handling. * Check the IAS report's cryptographic signature. * Accept CertPath from IAS instead of a Certificate. * Validate the certificate chain for the IAS report. * Refactor response handling, and add a secret to Message4. * Append public DH keys to generated shared secret. * Use DH secret to generate a 256 bit AES key. * Fix runISV Gradle task so that it creates WAR file. * Migrate MockIAS service into a separate package. * Remove unused aesCMAC field from Message3. * Configure HTTP sessions to expire after 10 idle minutes. * Ensure we select the "isv" key for MTLS with Intel Attestation Service. * Set key alias for Intel's public certificate. * Implement GET /attest/provision endpoint. * Use elliptic curves for Diffie-Hellman keys. * Pass public keys as Little Endian byte arrays without ASN.1 encoding. * Add AES-CMAC signature to Message2. * Remove signature fields from QUOTE body for sending to IAS. * Add a dummy AES-CMAC field to Message3 for later validation. * Generate AEC-CMAC for Message 3, and refactor crypto functionality. * Calculate AES-CMAC using AES/CBC/PKCS5Padding algorithm. * Use BouncyCastle's AESCMAC algorithm for MAC calculation. * Include standard crypto test vectors to the unit tests. * Encrypt MSG3 secret using AES/GCM/NoPadding with 128 bit key. * Hash shared key with Little Endian versions of public keys. * Refactor so that hexToBytes() is a utility. * Simplify signing of MocKIAS report. * Separate AES/GCM authentication tag from the encrypted data. * Create /ias/report endpoint for ISV which proxies IAS. * Remove unnecessary @Throws from MockIAS handlers. * Log HTTP error status from IAS. * Replace runISV task with startISV and stopISV tasks. * Refactor tests to use CryptoProvider @Rule instead of @Suite. * Move Web server for integration tests to use non-production ports. * Add proxy endpoint for IAS revocation list. * Generate an ECDSA "service key" for signing (gb|ga). * Generate a persistent key-pair for the ISV to sign with. * Verify the (Gb|Ga) signature from Message2. * Add debugging aids. * Fix Gradle warning. * Remove TLV header from Platform Info Body for MSG4. * Small tidy-up. * Use SPID "as-is" when calculating CMAC for MSG2. * Add DEBUG messages for MSG2's KDK and SMK values (AES-CMAC). * Add DEBUG logging for ECDH shared secret. * More DEBUG logging. * The ECDH shared secret *is* the x-coordinate: no need to subrange. * Adjust MockIAS to return an empty revocationList for GID 0000000b. * Fix ArrayOutOfBoundsException for "small" integer values. * Test MSG1 with empty revocation list. * Add extra logging for IAS report request. * ReportResponse object cannot be null. * Fix misreading of spec - don't remove quote's signature when requesting report from IAS. * Log invalid contents of X-IAS-Report-Signing-Certificate HTTP header. * Build CertPath for IAS from explicit list of Certificates. * Rename quote fields on IAS ReportResponse to match Intel. * Log report ID and quote status from IAS. * Add a revocation list checker to the certificate path validator. * Tweak revocation list options, depending on IAS vs MockIAS. * Extract Intel's certificate specifically by alias for PKIX. * Tune quote body returned by MockIAS. * Add AES-CMAC field to Message4 for validation. * Increase GCM authentication tag to 128 bits. * Receive platformInfoBlob from IAS as hexadecimal string. * Generate secret encryption key using KDK and SK values. * Marshall platformInfoBlob between Base16 string and ByteArray. * Interpret status results from IAS as enums. * Use lateinit for HttpServletRequest field. * Refactor ExceptionHandler out of messages package. * Alias is for ISV, so rename it. * Refactor classes into more correct packages. * Use random 96 bit IV for GCM encryption. * Parameterise HTTP/HTTPS ports via Gradle. * Do not forward a securityManifest containing only zeros to IAS. * Address review comments. * Review comment: Use NativePRNGNonBlocking for SecureRandom. * Rename isv.pfx to isv-svc.pfx * Rename keystore to isv.pfx, for clarity. * Update scripts so that they no longer require user input. * Generate isv.pfx from the key and certificates. * Remove private key from repository. * Declare an empty PSE Manifest to be invalid. * Generate keystores "on the fly". * Rename integration tests to end in "IT" instead of "Test". * Add README * Turn remote-attestation into a separate Gradle project. |
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README.md |
Remote Attestation ISV: Proof-Of-Concept
This initial version of the ISV expects to communicate with the Attestation Host, which should run on hardware with a SGX enclave. The ISV also communicates with the Intel Attestation Service (IAS) over HTTPS with mutual TLS, which requires it to contain our development private key. (We have already shared this key's public key with Intel, and IAS expects to use it to authenticate us.)
Please install this private key in PEM formt as src/main/ssl/intel-ssl/client.key
.
This ISV runs as a WAR file within Tomcat8, and implements the message flow as described in Intel's end-to-end example using JSON and HTTP. The use of HTTP here is mere convenience for our proof-of-concept; we anticipate using something completely different when we integrate with Corda.
Gradle/Tomcat integration is achieved using the Gretty plugin.
You will need OpenSSL installed so that Gradle can generate the keystores and truststores required by HTTPS and Mutual TLS.
Building the ISV
From this project directory, execute the command:
$ ../gradlew build integrationTest
Running the ISV
To launch the ISV as a daemon process listening on TCP/8080, execute:
$ nohup ../gradlew startISV &
The ISV can then be shutdown using:
$ ../gradlew stopISV
It will log messages to build/logs/attestation-server.log
.