Merge "KeyMint HAL: clarify spec text" (17a0526b) · Commits · e / os / android_hardware_interfaces

security/keymint/aidl/android/hardware/security/keymint/IKeyMintDevice.aidl

+8 −0

Original line number	Diff line number	Diff line
		@@ -275,6 +275,10 @@ interface IKeyMintDevice {
		* must return ErrorCode::INVALID_ARGUMENT. The values 3 and 65537 must be supported. It is
		* recommended to support all prime values up to 2^64.
		*
		* o Tag::CERTIFICATE_NOT_BEFORE and Tag::CERTIFICATE_NOT_AFTER specify the valid date range for
		* the returned X.509 certificate holding the public key. If omitted, generateKey must return
		* ErrorCode::MISSING_NOT_BEFORE or ErrorCode::MISSING_NOT_AFTER.
		*
		* The following parameters are not necessary to generate a usable RSA key, but generateKey must
		* not return an error if they are omitted:
		*
		@@ -295,6 +299,10 @@ interface IKeyMintDevice {
		* Tag::EC_CURVE must be provided to generate an ECDSA key. If it is not provided, generateKey
		* must return ErrorCode::UNSUPPORTED_KEY_SIZE. TEE IKeyMintDevice implementations must support
		* all curves. StrongBox implementations must support P_256.

		* Tag::CERTIFICATE_NOT_BEFORE and Tag::CERTIFICATE_NOT_AFTER must be provided to specify the
		* valid date range for the returned X.509 certificate holding the public key. If omitted,
		* generateKey must return ErrorCode::MISSING_NOT_BEFORE or ErrorCode::MISSING_NOT_AFTER.
		*
		* == AES Keys ==
		*

security/keymint/aidl/android/hardware/security/keymint/Tag.aidl

+14 −12

Original line number	Diff line number	Diff line
		@@ -478,11 +478,11 @@ enum Tag {
		/**
		* Tag::TRUSTED_CONFIRMATION_REQUIRED is only applicable to keys with KeyPurpose SIGN, and
		* specifies that this key must not be usable unless the user provides confirmation of the data
		* to be signed. Confirmation is proven to keyMint via an approval token. See
		* CONFIRMATION_TOKEN, as well as the ConfirmationUI HAL.
		* to be signed. Confirmation is proven to keyMint via an approval token. See the authToken
		* parameter of begin(), as well as the ConfirmationUI HAL.
		*
		* If an attempt to use a key with this tag does not have a cryptographically valid
		* CONFIRMATION_TOKEN provided to finish() or if the data provided to update()/finish() does not
		* token provided to finish() or if the data provided to update()/finish() does not
		* match the data described in the token, keyMint must return NO_USER_CONFIRMATION.
		*
		* Must be hardware-enforced.
		@@ -491,9 +491,11 @@ enum Tag {

		/**
		* Tag::UNLOCKED_DEVICE_REQUIRED specifies that the key may only be used when the device is
		* unlocked.
		* unlocked, as reported to KeyMint via authToken operation parameter and the
		* IKeyMintDevice::deviceLocked() method
		*
		* Must be software-enforced.
		* Must be hardware-enforced (but is also keystore-enforced on a per-user basis: see the
		* deviceLocked() documentation).
		*/
		UNLOCKED_DEVICE_REQUIRED = TagType.BOOL \| 509,

		@@ -864,8 +866,9 @@ enum Tag {
		*
		* STORAGE_KEY is used to denote that a key generated or imported is a key used for storage
		* encryption. Keys of this type can either be generated or imported or secure imported using
		* keyMint. exportKey() can be used to re-wrap storage key with a per-boot ephemeral key
		* wrapped key once the key characteristics are enforced.
		* keyMint. The convertStorageKeyToEphemeral() method of IKeyMintDevice can be used to re-wrap
		* storage key with a per-boot ephemeral key wrapped key once the key characteristics are
		* enforced.
		*
		* Keys with this tag cannot be used for any operation within keyMint.
		* ErrorCode::INVALID_OPERATION is returned when a key with Tag::STORAGE_KEY is provided to
		@@ -914,11 +917,10 @@ enum Tag {
		RESET_SINCE_ID_ROTATION = TagType.BOOL \| 1004,

		/**
		* Tag::CONFIRMATION_TOKEN is used to deliver a cryptographic token proving that the user
		* confirmed a signing request. The content is a full-length HMAC-SHA256 value. See the
		* ConfirmationUI HAL for details of token computation.
		* OBSOLETE: Do not use. See the authToken parameter for IKeyMintDevice::begin and for
		* IKeyMintOperation methods instead.
		*
		* Must never appear in KeyCharacteristics.
		* TODO(b/191738660): Delete when keystore1 is deleted.
		*/
		CONFIRMATION_TOKEN = TagType.BYTES \| 1005,