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EBML Signature

Status

The EBML Signature Elements are under development and not recommended for use in production. To inquire about, comment upon, or participate in the development of EBML Signatures please contact matroska-devel@lists.matroska.org (with a public archive).

Introduction

The EBML Signature Elements defines a syntax for the storage of digital signatures within an EBML document. The implementation is inspired by the XML Signature defined by the W3C.

This document is dependent on the EBML specification for the structure of EBML Elements and definition of data types.

Signature Elements

Element Name: SignatureSlot

Level:          1+
EBML ID:        [1B][53][86][67]
Mandatory:      No
Multiple:       Yes
Range:          -
Default:        -
Element Type:   Master-element
Description:    Contain signature of some (coming) elements in the
                stream.

Element Name: SignatureAlgo

Level:          2+
EBML ID:        [7E][8A]
Mandatory:      No
Multiple:       No
Range:          -
Default:        -
Element Type:   Unsigned Integer
Description:    Signature algorithm used (1=RSA, 2=elliptic).

Element Name: SignatureHash

Level:          2+
EBML ID:        [7E][9A]
Mandatory:      No
Multiple:       No
Range:          -
Default:        -
Element Type:   Unsigned Integer
Description:    Hash algorithm used (1=SHA1-160, 2=MD5).

Element Name: SignaturePublicKey

Level:          2+
EBML ID:        [7E][A5]
Mandatory:      No
Multiple:       No
Range:          -
Default:        -
Element Type:   Binary
Description:    The public key to use with the algorithm (in the
                case of a PKI-based signature).

Element Name: Signature

Level:          2+
EBML ID:        [7E][B5]
Mandatory:      No
Multiple:       No
Range:          -
Default:        -
Element Type:   Binary
Description:    The signature of the data.

Element Name: SignatureElements

Level:          2+
EBML ID:        [7E][5B]
Mandatory:      No
Multiple:       No
Range:          -
Default:        -
Element Type:   Master-element
Description:    Contains elements that will be used to compute the
                signature.

Element Name: SignatureElementList

Level:          3+
EBML ID:        [7E][7B]
Mandatory:      No
Multiple:       Yes
Range:          -
Default:        -
Element Type:   Master-element
Description:    A list consists of a number of consecutive elements
                that represent one case where data is used in
                signature. Ex: Cluster|Block|BlockAdditional
                means that the BlockAdditional of all Blocks in all
                Clusters is used for encryption.

Element Name: SignedElement

Level:          4+
EBML ID:        [65][32]
Mandatory:      No
Multiple:       Yes
Range:          -
Default:        -
Element Type:   Binary
Description:    An element ID whose data will be used to compute
                the signature.