class Acme::Client::JWK::RSA

Constants

DIGEST

Digest algorithm to use when signing.

Public Class Methods

new(private_key) click to toggle source

Instantiate a new RSA JWK.

private_key - A OpenSSL::PKey::RSA instance.

Returns nothing.

# File lib/acme/client/jwk/rsa.rb, line 10
def initialize(private_key)
  unless private_key.is_a?(OpenSSL::PKey::RSA)
    raise ArgumentError, 'private_key must be a OpenSSL::PKey::RSA'
  end

  @private_key = private_key
end

Public Instance Methods

jwa_alg() click to toggle source

The name of the algorithm as needed for the ‘alg` member of a JWS object.

Returns a String.

# File lib/acme/client/jwk/rsa.rb, line 41
def jwa_alg
  # https://tools.ietf.org/html/rfc7518#section-3.1
  # RSASSA-PKCS1-v1_5 using SHA-256
  'RS256'
end
sign(message) click to toggle source

Sign a message with the private key.

message - A String message to sign.

Returns a String signature.

# File lib/acme/client/jwk/rsa.rb, line 34
def sign(message)
  @private_key.sign(DIGEST.new, message)
end
to_h() click to toggle source

Get this JWK as a Hash for JSON serialization.

Returns a Hash.

# File lib/acme/client/jwk/rsa.rb, line 21
def to_h
  {
    e: Acme::Client::Util.urlsafe_base64(public_key.e.to_s(2)),
    kty: 'RSA',
    n: Acme::Client::Util.urlsafe_base64(public_key.n.to_s(2))
  }
end

Private Instance Methods

public_key() click to toggle source
# File lib/acme/client/jwk/rsa.rb, line 49
def public_key
  @private_key.public_key
end