Structure

P256K.Recovery.ECDSASignature

65-byte secp256k1 ECDSA recoverable signature (64-byte compact form + 1-byte recovery ID) produced by secp256k1_ecdsa_sign_recoverable using RFC 6979 deterministic nonces.

iOS 13.0+
macCatalyst 13.0+
macOS 10.15+
tvOS 13.0+
visionOS 1.0+
watchOS 6.0+

struct ECDSASignature

Mentioned In

Security Considerations

Overview

A recoverable signature allows P256K.Recovery.PublicKey to be reconstructed from the message hash alone via secp256k1_ecdsa_recover. Successful recovery guarantees the signature would pass secp256k1_ecdsa_verify after normalization; however, converting the signature to a non-recoverable form via normalize does not automatically normalize it. Call secp256k1_ecdsa_signature_normalize on the result of normalize if lower-S normalized form is required for standard ECDSA verification per BIP-146.

Topics

Construction

init<D>(dataRepresentation: D) throws
Creates an P256K.Recovery.ECDSASignature from a 65-byte raw recoverable signature representation.
init<D>(compactRepresentation: D, recoveryId: Int32) throws
Creates an P256K.Recovery.ECDSASignature from a 64-byte compact representation and recovery ID via secp256k1_ecdsa_recoverable_signature_parse_compact.

Serialization

Conversion

var normalize: P256K.Signing.ECDSASignature
Converts this recoverable signature to a standard P256K.Signing.ECDSASignature via secp256k1_ecdsa_recoverable_signature_convert.

Instance Methods

func withUnsafeBytes<R>((UnsafeRawBufferPointer) throws -> R) rethrows -> R
Calls body with an unsafe pointer to the signature’s 65 raw bytes.