Struct IdentityAssertionSigner

pub struct IdentityAssertionSigner { /* private fields */ }

An IdentityAssertionSigner extends the Signer interface to add zero or more identity assertions to a C2PA Manifest that is being produced.

Implementations

impl IdentityAssertionSigner

pub fn new(signer: Box<dyn RawSigner>) -> Self

Create an IdentityAssertionSigner wrapping the provided RawSigner instance.

pub fn add_identity_assertion(&mut self, iab: IdentityAssertionBuilder)

Add an IdentityAssertionBuilder to be used when signing the next Manifest.

IMPORTANT: When sign() is called, the list of IdentityAssertionBuilders will be cleared.

Trait Implementations

impl Signer for IdentityAssertionSigner

fn sign(&self, data: &[u8]) -> Result<Vec<u8>>

Returns a new byte array which is a signature over the original.

fn alg(&self) -> SigningAlg

Returns the algorithm of the Signer.

fn certs(&self) -> Result<Vec<Vec<u8>>>

Returns the certificates as a Vec containing a Vec of DER bytes for each certificate.

fn reserve_size(&self) -> usize

Returns the size in bytes of the largest possible expected signature. Signing will fail if the result of the sign function is larger than this value.

fn ocsp_val(&self) -> Option<Vec<u8>>

OCSP response for the signing cert if available This is the only C2PA supported cert revocation method. By pre-querying the value for a your signing cert the value can be cached taking pressure off of the CA (recommended by C2PA spec)

fn time_authority_url(&self) -> Option<String>

URL for time authority to time stamp the signature

fn timestamp_request_headers(&self) -> Option<Vec<(String, String)>>

Additional request headers to pass to the time stamp authority.

fn timestamp_request_body(&self, message: &[u8]) -> Result<Vec<u8>>

fn send_timestamp_request(&self, message: &[u8]) -> Option<Result<Vec<u8>>>

Request RFC 3161 timestamp to be included in the manifest data structure.

fn raw_signer(&self) -> Option<Box<&dyn RawSigner>>

If this struct also implements or wraps RawSigner, it should return a reference to that trait implementation.

fn dynamic_assertions(&self) -> Vec<Box<dyn DynamicAssertion>>

Returns a list of dynamic assertions that should be included in the manifest.

fn direct_cose_handling(&self) -> bool

If this returns true the sign function is responsible for for direct handling of the COSE structure.