Class EncryptionInfoDescriptor

Namespace

DocWright.Cryptography

Assembly

DocWright.Cryptography.dll

The version header of an EncryptionInfo stream, which is what identifies the scheme ([MS-OFFCRYPTO] §2.3.4.5). The rest of the stream is scheme-specific and is parsed by the scheme's own reader.

public sealed class EncryptionInfoDescriptor

Inheritance

object

EncryptionInfoDescriptor

Inherited Members

object.GetType()

object.ToString()

object.Equals(object)

object.Equals(object, object)

object.ReferenceEquals(object, object)

object.GetHashCode()

Properties

Flags

Gets the encryption flags that follow the version pair.

IsSupported

Gets a value indicating whether DocWright can decrypt this scheme given the correct password.

The two ECMA-376 schemes only. The legacy RC4 and XOR schemes are identified by name — so a caller is told what the file is rather than that it is broken — but they are not decrypted, and claiming otherwise here would turn an honest refusal into a wrong-password error further down.

Payload

Gets the descriptor bytes after the eight-byte header: the agile XML descriptor, or the standard scheme's binary EncryptionHeader and EncryptionVerifier.

Scheme

Gets the scheme the version pair and flags identify.

SchemeDisplayName

Gets a human-readable name for Scheme, suitable for a diagnostic or an exception message. Contains no key material.

VersionMajor

Gets the major version from the descriptor header.

VersionMinor

Gets the minor version from the descriptor header.

Methods

DescribeScheme(OfficeEncryptionScheme)

Returns a human-readable name for a scheme.

Read(Stream)

Parses an EncryptionInfo stream's header and captures the scheme-specific remainder.