certificates/kms/apiv1/options.go

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package apiv1
import (
"crypto"
"crypto/x509"
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"strings"
"github.com/pkg/errors"
)
// KeyManager is the interface implemented by all the KMS.
type KeyManager interface {
GetPublicKey(req *GetPublicKeyRequest) (crypto.PublicKey, error)
CreateKey(req *CreateKeyRequest) (*CreateKeyResponse, error)
CreateSigner(req *CreateSignerRequest) (crypto.Signer, error)
Close() error
}
// CertificateManager is the interface implemented by the KMS that can load and
// store x509.Certificates.
type CertificateManager interface {
LoadCertificate(req *LoadCertificateRequest) (*x509.Certificate, error)
StoreCertificate(req *StoreCertificateRequest) error
}
// ErrNotImplemented is the type of error returned if an operation is not
// implemented.
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type ErrNotImplemented struct {
Message string
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}
func (e ErrNotImplemented) Error() string {
if e.Message != "" {
return e.Message
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}
return "not implemented"
}
// ErrAlreadyExists is the type of error returned if a key already exists. This
// is currently only implmented on pkcs11.
type ErrAlreadyExists struct {
Message string
}
func (e ErrAlreadyExists) Error() string {
if e.Message != "" {
return e.Message
}
return "key already exists"
}
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// Type represents the KMS type used.
type Type string
const (
// DefaultKMS is a KMS implementation using software.
DefaultKMS Type = ""
// SoftKMS is a KMS implementation using software.
SoftKMS Type = "softkms"
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// CloudKMS is a KMS implementation using Google's Cloud KMS.
CloudKMS Type = "cloudkms"
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// AmazonKMS is a KMS implementation using Amazon AWS KMS.
AmazonKMS Type = "awskms"
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// PKCS11 is a KMS implementation using the PKCS11 standard.
PKCS11 Type = "pkcs11"
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// YubiKey is a KMS implementation using a YubiKey PIV.
YubiKey Type = "yubikey"
// SSHAgentKMS is a KMS implementation using ssh-agent to access keys.
SSHAgentKMS Type = "sshagentkms"
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)
// Options are the KMS options. They represent the kms object in the ca.json.
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type Options struct {
// The type of the KMS to use.
Type string `json:"type"`
// Path to the credentials file used in CloudKMS and AmazonKMS.
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CredentialsFile string `json:"credentialsFile"`
// URI is based on the PKCS #11 URI Scheme defined in
// https://tools.ietf.org/html/rfc7512 and represents the configuration used
// to connect to the KMS.
//
// Used by: pkcs11
URI string `json:"uri"`
// Pin used to access the PKCS11 module. It can be defined in the URI using
// the pin-value or pin-source properties.
Pin string `json:"pin"`
// ManagementKey used in YubiKeys. Default management key is the hexadecimal
// string 010203040506070801020304050607080102030405060708:
// []byte{
// 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
// 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
// 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
// }
ManagementKey string `json:"managementKey"`
// Region to use in AmazonKMS.
Region string `json:"region"`
// Profile to use in AmazonKMS.
Profile string `json:"profile"`
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}
// Validate checks the fields in Options.
func (o *Options) Validate() error {
if o == nil {
return nil
}
switch Type(strings.ToLower(o.Type)) {
case DefaultKMS, SoftKMS: // Go crypto based kms.
case CloudKMS, AmazonKMS, SSHAgentKMS: // Cloud based kms.
case YubiKey, PKCS11: // Hardware based kms.
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default:
return errors.Errorf("unsupported kms type %s", o.Type)
}
return nil
}