Factory BCC extraction tool to consume verified device info
BCC extraction tool calls OEMCrypto_GetDeviceInformation() to read verified device info from TEE. If the verified device info is not available, (e.g. not implemented), it falls back to using OS properties. This CL is mostly identical to ag/20799640, which has the same change for our internal extraction tool. For historical reason, we keep two copies of the extraction tool which are slightly different from each other, one for factory use, one for debug use. Long term they will be merged. Test: Ran the tool on Pixel 7 w/wo verified device info being present Bug: 263312447 Change-Id: Ib9c77dee45e9ff996fc2dc2da14f16f60eaff77c
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@@ -13,6 +13,13 @@
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namespace widevine {
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struct VerifiedDeviceInfo {
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std::vector<uint8_t> device_info;
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// Used by Interface of Remote Provisioning Component (IRPC) v3 for CSR
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// uploading
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std::vector<uint8_t> signed_csr_payload;
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};
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class OEMCryptoInterface {
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public:
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OEMCryptoInterface() = default;
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@@ -30,6 +37,11 @@ class OEMCryptoInterface {
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// implementation.
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OEMCryptoResult GetOEMCryptoBuildInfo(std::string& build_info);
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// Retrieves the verified device information of the OEMCrypto library from
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// OEMCrypto implementation.
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OEMCryptoResult GetVerifiedDeviceInformation(
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VerifiedDeviceInfo& verified_device_info);
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private:
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typedef OEMCryptoResult (*Initialize_t)();
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typedef OEMCryptoResult (*Terminate_t)();
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@@ -38,11 +50,15 @@ class OEMCryptoInterface {
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size_t* additional_signature_size);
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typedef OEMCryptoResult (*BuildInformation_t)(char* buffer,
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size_t* buffer_length);
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typedef OEMCryptoResult (*GetDeviceInformation_t)(
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uint8_t* device_info, size_t* device_info_length,
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uint8_t* signed_csr_payload, size_t* signed_csr_payload_length);
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Initialize_t Initialize = nullptr;
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Terminate_t Terminate = nullptr;
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GetBootCertificateChain_t GetBootCertificateChain = nullptr;
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BuildInformation_t BuildInformation = nullptr;
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GetDeviceInformation_t GetDeviceInformation = nullptr;
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void* handle_ = nullptr;
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};
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@@ -41,6 +41,8 @@ class WidevineProvisioner {
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cppbor::Array BuildCertReqRecipients(const std::vector<uint8_t>& pubkey,
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const std::vector<uint8_t>& kid) const;
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void InitializeCryptoInterface();
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bool GetDeviceInfoCommon(cppbor::Map& device_info_map);
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bool TryAddVerifiedDeviceInfo(cppbor::Map& device_info_map);
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std::unique_ptr<OEMCryptoInterface> crypto_interface_;
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};
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