| a95550f8016bbb0dba086dbd73eec63e6cdbbe98 |
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17-Jul-2015 |
Alex Klyubin <klyubin@google.com> |
Add KM_MIN_MAC_LENGTH tag to HMAC and AES-GCM keys.
This makes Android Keystore add the KM_MIN_MAC_LENGTH tag to generated
and imported HMAC and AES-GCM keys. This tag specifies the minimum
length of the MAC/authentication tag authorized to be used for the
key.
For HMAC keys the minimum MAC length is set to the length of the
digest associated with the key (HMAC keys are authorized for exactly
one digest). For AES keys the minimum authetication tag length is set
to 96 bit. This is the minimum supported by Android Keystore's AES-GCM
implementation.
Bug: 22337277
Change-Id: Ic6e47cf084734d1592788dc58088889f7fff74eb
/frameworks/base/keystore/java/android/security/keystore/AndroidKeyStoreAuthenticatedAESCipherSpi.java
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| 5c38e7918aea36ee8f516793d5641b05a8de710e |
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08-Jul-2015 |
Alex Klyubin <klyubin@google.com> |
Reject AlgorithmParameters of wrong type.
This makes Android Keystore Cipher implementations reject rather than
ignore AlgorithmParameters of wrong algorithm type. The danger in not
doing so is that a Cipher will produce output that does not actually
depend on the provided AlgorithmParameters.
Bug: 22330716
Change-Id: Ifa9de2c74f2fe4b738a3731c895059dddd075a13
/frameworks/base/keystore/java/android/security/keystore/AndroidKeyStoreAuthenticatedAESCipherSpi.java
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| d23dc502b0a1952887d4453cba98aa2e3d2f5009 |
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24-Jun-2015 |
Alex Klyubin <klyubin@google.com> |
Make NONEwithECDSA truncate input when necessary.
Keymaster's implementation of ECDSA with digest NONE rejects input
longer than group size in bytes. RI's NONEwithECDSA accepts inputs
of arbitrary length by truncating them to the above size. This CL
makes Android Keystore's NONEwithECDSA do the truncation to keep
the JCA and Keymaster happy.
The change is inside AndroidKeyStoreECDSASignatureSpi$NONE. All other
small modifications are for supporting that change by making it
possible for AndroidKeyStoreSignatureSpiBase to pass in the signature
being verified into KeyStoreCryptoOperationStreamer. This in turn is
needed to make it possible for NONEwithECDSA implementation to provide
a wrapper streamer which truncates input.
Bug: 22030217
Change-Id: I26064f6df37ef8c631d70a36a356aa0b76a9ad29
/frameworks/base/keystore/java/android/security/keystore/AndroidKeyStoreAuthenticatedAESCipherSpi.java
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| ae6cb7aad56bb006769cd8a69b92af7236644fc1 |
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23-Jun-2015 |
Alex Klyubin <klyubin@google.com> |
Keymaster INT, LONG and DATE tag values are unsigned.
This CL ensures that Android Keystore framework code complies with
signedness of keymaster tags. In particular:
* INT tags are unsigned 32-bit numbers, and
* LONG and DATE tags are unsigned 64-bit numbers.
The ensure compliance, KeymasterArguments and KeyCharacteristics
classes through which Android Keystore interacts with Keymaster tags
have been modified as follows:
* ENUM and INT tags which used to be conflated are now added/queried
via separate methods, because ENUM can remain represented as an int
data type whereas INT is now represented as a long data type with
permitted range being [0; 2^32).
* Methods for adding/quering LONG tags have been switched from the long
data type to the BigInteger data type and now ensure that the value
is in the permitted [0; 2^63).
* Methods for adding/querying DATE tags now ensure the Date value is
in the permitted range [0; 2^63) ms since Unix epoch.
* Methods for adding tags throw an IllegalArgumentException if the tag
type is unsuitable for the method. This is to ensure that tags with
invalid values cannot be added through similar methods (e.g., INT tag
added via an ENUM tag addition method invoked with a negative value).
Bug: 22008538
Change-Id: I6eefd5cbb561cc52d27de952691af4d9d5e1af1e
/frameworks/base/keystore/java/android/security/keystore/AndroidKeyStoreAuthenticatedAESCipherSpi.java
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| 00af27b7d9010eb41e45959dab7c4ff6de119897 |
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02-Jun-2015 |
Alex Klyubin <klyubin@google.com> |
Expose AES GCM backed by Android Keystore.
Bug: 18088752
Bug: 21786749
Change-Id: Ica90491037d2920f7635195894ba18882fc4406d
/frameworks/base/keystore/java/android/security/keystore/AndroidKeyStoreAuthenticatedAESCipherSpi.java
|