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Change the language for SB AES key sizes

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This alters the HAL documentation to specify that StrongBox must ONLY
support AES 128 and 256 keys.

Bug: 191736606
Test: Read the documentation and confirm that it is clear.
Change-Id: I484d51700df28eb073b7928b6dc7a3b52c59caee
This commit is contained in:
Max Bires
2021-09-01 23:24:01 -07:00
parent 334a6134de
commit b04c67a938
1 changed files with 2 additions and 1 deletions
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3
security/keymint/aidl/android/hardware/security/keymint/IKeyMintDevice.aidl
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@@ -96,7 +96,8 @@ import android.hardware.security.secureclock.TimeStampToken;
*
* o AES
*
* - 128 and 256-bit keys
* - TRUSTED_ENVIRONMENT IKeyMintDevices must support 128, 192 and 256-bit keys.
* STRONGBOX IKeyMintDevices must only support 128 and 256-bit keys.
* - CBC, CTR, ECB and GCM modes. The GCM mode must not allow the use of tags smaller than 96
* bits or nonce lengths other than 96 bits.
* - CBC and ECB modes must support unpadded and PKCS7 padding modes. With no padding CBC and