android_packages_modules_Vi.../microdroid/signature/README.md

# Microdroid Signature

Microdroid Signature contains the signatures of the payloads so that the payloads are
verified inside the Guest OS.

* APEX packages that are passed to microdroid should be listed in the Microroid Signature.

## Format

Microdroid Signature is composed of header and body.

| offset | size | description                                                    |
|--------|------|----------------------------------------------------------------|
| 0      | 4    | Header. unsigned int32: body length(L) in big endian           |
| 4      | L    | Body. A protobuf message. [schema](microdroid_signature.proto) |
Add a proto for the microdroid signature partition Microdroid will use this special partition composed of signatures to verify the payloads delivered from the host. For now it only conveys the list of APEX signatures: size, public key, root digest. The signature partition can be a part of the payload composite disk image. The format of the signature partition is, as described in README.md, composed of header and body. For now the header is simply the size of the body(protobuf message). Bug: 185069443 Test: n/a Change-Id: I47c7eac195999bab15ee80d3ad053261f04df89c 2021-04-14 06:34:24 +00:00			`# Microdroid Signature`

			`Microdroid Signature contains the signatures of the payloads so that the payloads are`
			`verified inside the Guest OS.`

			`* APEX packages that are passed to microdroid should be listed in the Microroid Signature.`

			`## Format`

			`Microdroid Signature is composed of header and body.`

			`\| offset \| size \| description \|`
			`\|--------\|------\|----------------------------------------------------------------\|`
			`\| 0 \| 4 \| Header. unsigned int32: body length(L) in big endian \|`
			`\| 4 \| L \| Body. A protobuf message. [schema](microdroid_signature.proto) \|`