sign(_:algorithm:completion:)

Generates a digital signature for the data you supply.

Declaration

func sign(_ data: Data, algorithm: SecKeyAlgorithm, completion handler: @escaping  @Sendable (Data?, (any Error)?) -> Void)

func sign(_ data: Data, algorithm: SecKeyAlgorithm) async throws -> Data

Parameters

data:
The data to sign. The data is usually the digest of applying a cryptographic hash function to some actual data.
algorithm:
An algorithm suitable for this data signing operation. For example, ecdsaSignatureMessageX962SHA256.
handler:
A completion handler to call when the signing operation completes.
data
The signature of the data you supply.
error
An error object that indicates why the signing operation failed, or nil if it succeeded.

Discussion

important:

You can call this method from synchronous code using a completion handler, as shown on this page, or you can call it as an asynchronous method that has the following declaration:

func sign(_ data: Data, algorithm: SecKeyAlgorithm) async throws -> Data

For information about concurrency and asynchronous code in Swift, see Calling Objective-C APIs Asynchronously.

sign(_:algorithm:completion:)

Declaration

Parameters

Discussion

See Also

Performing cryptographic operations