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https://github.com/hasura/graphql-engine.git
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3394c97fdc
PR-URL: https://github.com/hasura/graphql-engine-mono/pull/6526 Co-authored-by: Aravind K P <8335904+scriptonist@users.noreply.github.com> GitOrigin-RevId: b12bbdf7bfac7eb3313b3e814aa6e1d73e77d3ce
57 lines
1.4 KiB
Go
57 lines
1.4 KiB
Go
// Copyright 2019 The Kubernetes Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package download
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import (
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"bytes"
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"crypto/sha256"
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"encoding/hex"
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"fmt"
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"hash"
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"io"
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"github.com/hasura/graphql-engine/cli/v2/internal/errors"
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)
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// Verifier can check a reader against it's correctness.
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type Verifier interface {
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io.Writer
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Verify() error
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}
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var _ Verifier = sha256Verifier{}
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type sha256Verifier struct {
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hash.Hash
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wantedHash []byte
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}
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// NewSha256Verifier creates a Verifier that tests against the given hash.
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func NewSha256Verifier(hashed string) Verifier {
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raw, _ := hex.DecodeString(hashed)
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return sha256Verifier{
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Hash: sha256.New(),
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wantedHash: raw,
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}
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}
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func (v sha256Verifier) Verify() error {
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var op errors.Op = "download.sha256Verifier.Verify"
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if bytes.Equal(v.wantedHash, v.Sum(nil)) {
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return nil
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}
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return errors.E(op, fmt.Errorf("checksum does not match, want: %x, got %x", v.wantedHash, v.Sum(nil)))
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}
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