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// Copyright 2017 Google LLC. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package testdata
import (
"crypto"
"io"
)
// signerStub returns a fixed signature and error, no matter the input.
// It implements crypto.Signer.
type signerStub struct {
publicKey crypto.PublicKey
signature []byte
err error
}
// Public returns the public key associated with the signer that this stub is based on.
func (s *signerStub) Public() crypto.PublicKey { return s.publicKey }
// Sign will return the signature or error that the signerStub was created to provide.
func (s *signerStub) Sign(rand io.Reader, digest []byte, opts crypto.SignerOpts) ([]byte, error) {
return s.signature, s.err
}
// NewSignerWithErr creates a signer that always returns err when Sign() is called.
func NewSignerWithErr(pubKey crypto.PublicKey, err error) crypto.Signer {
return &signerStub{
publicKey: pubKey,
err: err,
}
}
// NewSignerWithFixedSig creates a signer that always return sig when Sign() is called.
func NewSignerWithFixedSig(pubKey crypto.PublicKey, sig []byte) crypto.Signer {
return &signerStub{
publicKey: pubKey,
signature: sig,
}
}
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