cloudkms

Documentation

Index

• Constants
• Variables
• func Parent(name string) (string, string)
• type CloudKMS
  • func New(ctx context.Context, opts apiv1.Options) (*CloudKMS, error)
  • func NewCloudKMS(client KeyManagementClient) *CloudKMS
  • func (k *CloudKMS) Close() error
  • func (k *CloudKMS) CreateDecrypter(req *apiv1.CreateDecrypterRequest) (crypto.Decrypter, error)
  • func (k *CloudKMS) CreateKey(req *apiv1.CreateKeyRequest) (*apiv1.CreateKeyResponse, error)
  • func (k *CloudKMS) CreateSigner(req *apiv1.CreateSignerRequest) (crypto.Signer, error)
  • func (k *CloudKMS) GetPublicKey(req *apiv1.GetPublicKeyRequest) (crypto.PublicKey, error)
• type Decrypter
  • func NewDecrypter(client KeyManagementClient, decryptionKey string) (*Decrypter, error)
  • func (d *Decrypter) Decrypt(_ io.Reader, ciphertext []byte, opts crypto.DecrypterOpts) ([]byte, error)
  • func (d *Decrypter) Public() crypto.PublicKey
• type KeyManagementClient
• type Signer
  • func NewSigner(c KeyManagementClient, signingKey string) (*Signer, error)
  • func (s *Signer) Public() crypto.PublicKey
  • func (s *Signer) Sign(_ io.Reader, digest []byte, opts crypto.SignerOpts) ([]byte, error)
  • func (s *Signer) SignatureAlgorithm() x509.SignatureAlgorithm

Constants

const Scheme = string(apiv1.CloudKMS)

Scheme is the scheme used in uris, the string "cloudkms".

Variables

var ErrTooManyRetries = errors.New("too many retries")

ErrTooManyRetries is the type of error when a method attempts too many retries.

Functions

func Parent

func Parent(name string) (string, string)

Parent splits a string in the format `key/value/key2/value2` in a parent and child, for the previous string it will return `key/value` and `value2`.

Types

type CloudKMS

type CloudKMS struct {
	// contains filtered or unexported fields
}

CloudKMS implements a KMS using Google's Cloud apiv1.

func New

func New(ctx context.Context, opts apiv1.Options) (*CloudKMS, error)

New creates a new CloudKMS configured with a new client.

func NewCloudKMS

func NewCloudKMS(client KeyManagementClient) *CloudKMS

NewCloudKMS creates a CloudKMS with a given client.

func (*CloudKMS) Close

func (k *CloudKMS) Close() error

Close closes the connection of the Cloud KMS client.

func (*CloudKMS) CreateDecrypter

func (k *CloudKMS) CreateDecrypter(req *apiv1.CreateDecrypterRequest) (crypto.Decrypter, error)

CreateDecrypter implements the apiv1.Decrypter interface and returns a crypto.Decrypter backed by a decryption key in Google Cloud KMS.

func (*CloudKMS) CreateKey

func (k *CloudKMS) CreateKey(req *apiv1.CreateKeyRequest) (*apiv1.CreateKeyResponse, error)

CreateKey creates in Google's Cloud KMS a new asymmetric key for signing.

func (*CloudKMS) CreateSigner

func (k *CloudKMS) CreateSigner(req *apiv1.CreateSignerRequest) (crypto.Signer, error)

CreateSigner returns a new cloudkms signer configured with the given signing key name.

func (*CloudKMS) GetPublicKey

func (k *CloudKMS) GetPublicKey(req *apiv1.GetPublicKeyRequest) (crypto.PublicKey, error)

GetPublicKey gets from Google's Cloud KMS a public key by name. Key names follow the pattern:

projects/([^/]+)/locations/([a-zA-Z0-9_-]{1,63})/keyRings/([a-zA-Z0-9_-]{1,63})/cryptoKeys/([a-zA-Z0-9_-]{1,63})/cryptoKeyVersions/([a-zA-Z0-9_-]{1,63})

type Decrypter

type Decrypter struct {
	// contains filtered or unexported fields
}

Decrypter implements a crypto.Decrypter using Google Cloud KMS.

func NewDecrypter

func NewDecrypter(client KeyManagementClient, decryptionKey string) (*Decrypter, error)

NewDecrypter creates a new crypto.Decrypter backed by the given Google Cloud KMS decryption key.

func (*Decrypter) Decrypt

func (d *Decrypter) Decrypt(_ io.Reader, ciphertext []byte, opts crypto.DecrypterOpts) ([]byte, error)

Decrypt decrypts ciphertext using the decryption key backed by Google Cloud KMS and returns the plaintext bytes. An error is returned when decryption fails. Google Cloud KMS only supports RSA keys with 2048, 3072 or 4096 bits and will always use OAEP. It supports SHA1, SHA256 and SHA512. Labels are not supported. Before calling out to GCP, some validation is performed so that known bad parameters are detected client-side and a more meaningful error is returned for those cases.

Also see https://cloud.google.com/kms/docs/algorithms#asymmetric_encryption_algorithms.

func (*Decrypter) Public

func (d *Decrypter) Public() crypto.PublicKey

Public returns the public key of this decrypter

type KeyManagementClient

type KeyManagementClient interface {
	Close() error
	GetPublicKey(context.Context, *kmspb.GetPublicKeyRequest, ...gax.CallOption) (*kmspb.PublicKey, error)
	AsymmetricSign(context.Context, *kmspb.AsymmetricSignRequest, ...gax.CallOption) (*kmspb.AsymmetricSignResponse, error)
	AsymmetricDecrypt(context.Context, *kmspb.AsymmetricDecryptRequest, ...gax.CallOption) (*kmspb.AsymmetricDecryptResponse, error)
	CreateCryptoKey(context.Context, *kmspb.CreateCryptoKeyRequest, ...gax.CallOption) (*kmspb.CryptoKey, error)
	GetKeyRing(context.Context, *kmspb.GetKeyRingRequest, ...gax.CallOption) (*kmspb.KeyRing, error)
	CreateKeyRing(context.Context, *kmspb.CreateKeyRingRequest, ...gax.CallOption) (*kmspb.KeyRing, error)
	CreateCryptoKeyVersion(ctx context.Context, req *kmspb.CreateCryptoKeyVersionRequest, opts ...gax.CallOption) (*kmspb.CryptoKeyVersion, error)
}

KeyManagementClient defines the methods on KeyManagementClient that this package will use. This interface will be used for unit testing.

type Signer

type Signer struct {
	// contains filtered or unexported fields
}

Signer implements a crypto.Signer using Google's Cloud KMS.

func NewSigner

func NewSigner(c KeyManagementClient, signingKey string) (*Signer, error)

NewSigner creates a new crypto.Signer the given CloudKMS signing key.

func (*Signer) Public

func (s *Signer) Public() crypto.PublicKey

Public returns the public key of this signer or an error.

func (*Signer) Sign

func (s *Signer) Sign(_ io.Reader, digest []byte, opts crypto.SignerOpts) ([]byte, error)

Sign signs digest with the private key stored in Google's Cloud KMS.

func (*Signer) SignatureAlgorithm

func (s *Signer) SignatureAlgorithm() x509.SignatureAlgorithm

SignatureAlgorithm returns the algorithm that must be specified in a certificate to sign. This is specially important to distinguish RSA and RSAPSS schemas.