COSEKey

class COSEKey

Constants

int

public const int = null

int

public const int = null

int

public const int = null

array

public const array = null

int

private const int = null

int

private const int = null

int

private const int = null

int

private const int = null

Properties

algorithm

public readonly int $algorithm

Type: int

pem

public readonly string $pem

Type: string

cose

public readonly string $cose

Type: string

Methods

__construct

private __construct(int $algorithm, string $pem, string $cose): void

Parameters

Parameter	Type	Description
$algorithm	int
$pem	string
$cose	string

fromCOSE

Parses a COSE key from its CBOR encoding.

public fromCOSE(string $cose): self

Returns: self

Parameters

Parameter	Type	Description
$cose	string

fromMap

Builds a key from an already decoded COSE map.

public fromMap(array $map, string $cose): self

Returns: self

Parameters

Parameter	Type	Description
$map	array	the decoded map
$cose	string	the map's original CBOR bytes, kept for storage

verify

Verifies a signature made with this key's private half.

public verify(string $data, string $signature): bool

Returns: bool

ES256 signatures are ASN.1 DER encoded, as WebAuthn specifies; EdDSA signatures are the raw 64 bytes; RS256 signatures are PKCS#1 v1.5.

Parameters

Parameter	Type	Description
$data	string
$signature	string

ec2

private ec2(array $map, mixed $kty): string

Returns: string

Parameters

Parameter	Type	Description
$map	array
$kty	mixed

okp

private okp(array $map, mixed $kty): string

Returns: string

Parameters

Parameter	Type	Description
$map	array
$kty	mixed

rsa

private rsa(array $map, mixed $kty): string

Returns: string

Parameters

Parameter	Type	Description
$map	array
$kty	mixed

coordinate

private coordinate(array $map, int $label, int $length): string

Returns: string

Parameters

Parameter	Type	Description
$map	array
$label	int
$length	int

sequence

private sequence(string $content): string

Returns: string

Parameters

Parameter	Type	Description
$content	string

oid

private oid(string $hex): string

Returns: string

Parameters

Parameter	Type	Description
$hex	string

bitString

private bitString(string $bytes): string

Returns: string

Parameters

Parameter	Type	Description
$bytes	string

integer

A positive DER INTEGER from big-endian bytes.

private integer(string $bytes): string

Returns: string

Parameters

Parameter	Type	Description
$bytes	string

length

private length(int $length): string

Returns: string

Parameters

Parameter	Type	Description
$length	int

clearOpenSSLErrors

Drains OpenSSL's error queue, so a failure here doesn't show up in an unrelated openssl_error_string() call.

private clearOpenSSLErrors(): void

Returns: void

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