mls_rs

Trait IdentityProvider

Source 
pub trait IdentityProvider: Send + Sync {
    type Error: IntoAnyError;

    // Required methods
    fn validate_member(
        &self,
        signing_identity: &SigningIdentity,
        timestamp: Option<MlsTime>,
        context: MemberValidationContext<'_>,
    ) -> Result<(), Self::Error>;
    fn validate_external_sender(
        &self,
        signing_identity: &SigningIdentity,
        timestamp: Option<MlsTime>,
        extensions: Option<&ExtensionList>,
    ) -> Result<(), Self::Error>;
    fn identity(
        &self,
        signing_identity: &SigningIdentity,
        extensions: &ExtensionList,
    ) -> Result<Vec<u8>, Self::Error>;
    fn valid_successor(
        &self,
        predecessor: &SigningIdentity,
        successor: &SigningIdentity,
        extensions: &ExtensionList,
    ) -> Result<bool, Self::Error>;
    fn supported_types(&self) -> Vec<CredentialType>;
}
Expand description

Identity system that can be used to validate a SigningIdentity

Required Associated Types§

Source

type Error: IntoAnyError

Error type that this provider returns on internal failure.

Required Methods§

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fn validate_member( &self, signing_identity: &SigningIdentity, timestamp: Option<MlsTime>, context: MemberValidationContext<'_>, ) -> Result<(), Self::Error>

Determine if signing_identity is valid for a group member.

A timestamp value can optionally be supplied to aid with validation of a Credential that requires time based context. For example, X.509 certificates can become expired.

Source

fn validate_external_sender( &self, signing_identity: &SigningIdentity, timestamp: Option<MlsTime>, extensions: Option<&ExtensionList>, ) -> Result<(), Self::Error>

Determine if signing_identity is valid for an external sender in the ExternalSendersExtension stored in the group context.

A timestamp value can optionally be supplied to aid with validation of a Credential that requires time based context. For example, X.509 certificates can become expired.

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fn identity( &self, signing_identity: &SigningIdentity, extensions: &ExtensionList, ) -> Result<Vec<u8>, Self::Error>

A unique identifier for signing_identity.

The MLS protocol requires that each member of a group has a unique identifiers, which is determined by the application. The identity must be stable over the lifetime of the group.

The identity does not need to be consistent for different group members: Alice might use b"bob-123" as the identity for Bob, while Bob on his side could use b"Bob" for himself.

Source

fn valid_successor( &self, predecessor: &SigningIdentity, successor: &SigningIdentity, extensions: &ExtensionList, ) -> Result<bool, Self::Error>

Determines if successor can remove predecessor as part of an external commit.

The MLS protocol allows for removal of an existing member when adding a new member via external commit. This function determines if a removal should be allowed by providing the target member to be removed as predecessor and the new member as successor.

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fn supported_types(&self) -> Vec<CredentialType>

Credential types that are supported by this provider.

Implementors§