EccRecoverKey

public class EccRecoverKey

Utilities for recovering supported ECC keys.

  • Default init.

    Declaration

    Swift

    public init()
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  • Recover a public key from the private key.

    Throws

    If the public key cannot be recovered, or another error is encountered.

    Declaration

    Swift

    public class func recoverPublicKey(privateKey: Data, curve: EllipticCurveType) throws -> Data

    Parameters

    privateKey

    The private key.
    curve

    The curve K1 or R1.

    Return Value

    The public key.

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  • Recover a public key from a signature, message.

    Throws

    If unable to recover the target public key.

    Declaration

    Swift

    public class func recoverPublicKey(signatureDer: Data, message: Data, recid: Int, curve: EllipticCurveType = .r1) throws -> Data

    Parameters

    signatureDer

    The signature in der format.
    message

    The message.
    recid

    The recovery id (0-3).
    curve

    The curve K1 or R1.

    Return Value

    The public key.

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  • Get the recovery id (recid) for a signature, message and target public key.

    Throws

    If none of the possible recids recover the target public key.

    Declaration

    Swift

    public class func recid(signatureDer: Data, message: Data, targetPublicKey: Data, curve: EllipticCurveType = .r1) throws -> Int

    Parameters

    signatureDer

    The signature in der format.
    message

    The message.
    targetPublicKey

    The target public key.
    curve

    The curve K1 or R1.

    Return Value

    The recovery id (0-3).

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