// 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, } }