From 9e0b16c492d7b76f7ab451580a888a34ea1a9b33 Mon Sep 17 00:00:00 2001 From: Tan Jiang Date: Mon, 27 Mar 2017 15:49:18 +0800 Subject: [PATCH] fixes 1811 --- src/common/utils/notary/helper.go | 13 + src/common/utils/notary/helper_test.go | 24 + src/ui/api/repository.go | 16 +- .../opencontainers/go-digest/CONTRIBUTING.md | 72 +++ .../opencontainers/go-digest/LICENSE.code | 191 ++++++++ .../opencontainers/go-digest/LICENSE.docs | 425 ++++++++++++++++++ .../opencontainers/go-digest/MAINTAINERS | 9 + .../opencontainers/go-digest/README.md | 104 +++++ .../opencontainers/go-digest/algorithm.go | 158 +++++++ .../opencontainers/go-digest/digest.go | 154 +++++++ .../opencontainers/go-digest/digester.go | 39 ++ .../opencontainers/go-digest/doc.go | 56 +++ .../opencontainers/go-digest/verifiers.go | 45 ++ src/vendor/vendor.json | 6 + 14 files changed, 1310 insertions(+), 2 deletions(-) create mode 100644 src/vendor/github.com/opencontainers/go-digest/CONTRIBUTING.md create mode 100644 src/vendor/github.com/opencontainers/go-digest/LICENSE.code create mode 100644 src/vendor/github.com/opencontainers/go-digest/LICENSE.docs create mode 100644 src/vendor/github.com/opencontainers/go-digest/MAINTAINERS create mode 100644 src/vendor/github.com/opencontainers/go-digest/README.md create mode 100644 src/vendor/github.com/opencontainers/go-digest/algorithm.go create mode 100644 src/vendor/github.com/opencontainers/go-digest/digest.go create mode 100644 src/vendor/github.com/opencontainers/go-digest/digester.go create mode 100644 src/vendor/github.com/opencontainers/go-digest/doc.go create mode 100644 src/vendor/github.com/opencontainers/go-digest/verifiers.go diff --git a/src/common/utils/notary/helper.go b/src/common/utils/notary/helper.go index 3430d7b63..a6c9ed1d7 100644 --- a/src/common/utils/notary/helper.go +++ b/src/common/utils/notary/helper.go @@ -16,6 +16,8 @@ package notary import ( + "encoding/hex" + "fmt" "os" "path" "strings" @@ -27,6 +29,8 @@ import ( "github.com/vmware/harbor/src/common/utils/log" "github.com/vmware/harbor/src/common/utils/registry" "github.com/vmware/harbor/src/common/utils/registry/auth" + + "github.com/opencontainers/go-digest" ) var ( @@ -87,3 +91,12 @@ func GetTargets(notaryEndpoint string, username string, fqRepo string) ([]Target } return res, nil } + +// DigestFromTarget get a target and return the value of digest, in accordance to Docker-Content-Digest +func DigestFromTarget(t Target) (string, error) { + sha, ok := t.Hashes["sha256"] + if !ok { + return "", fmt.Errorf("no valid hash, expecting sha256") + } + return digest.NewDigestFromHex("sha256", hex.EncodeToString(sha)).String(), nil +} diff --git a/src/common/utils/notary/helper_test.go b/src/common/utils/notary/helper_test.go index 0ef4d225c..68456bfe1 100644 --- a/src/common/utils/notary/helper_test.go +++ b/src/common/utils/notary/helper_test.go @@ -1,6 +1,7 @@ package notary import ( + "encoding/json" "fmt" "github.com/stretchr/testify/assert" notarytest "github.com/vmware/harbor/src/common/utils/notary/test" @@ -34,3 +35,26 @@ func TestGetTargets(t *testing.T) { assert.Nil(t, err, fmt.Sprintf("Unexpected error: %v", err)) assert.Equal(t, 0, len(targets), "Targets list should be empty for non exist repo.") } + +func TestGetDigestFromTarget(t *testing.T) { + str := ` { + "tag": "1.0", + "hashes": { + "sha256": "E1lggRW5RZnlZBY4usWu8d36p5u5YFfr9B68jTOs+Kc=" + } + }` + + var t1 Target + err := json.Unmarshal([]byte(str), &t1) + if err != nil { + panic(err) + } + hash2 := make(map[string][]byte) + t2 := Target{"2.0", hash2} + d1, err1 := DigestFromTarget(t1) + assert.Nil(t, err1, "Unexpected error: %v", err1) + assert.Equal(t, "sha256:1359608115b94599e5641638bac5aef1ddfaa79bb96057ebf41ebc8d33acf8a7", d1, "digest mismatch") + _, err2 := DigestFromTarget(t2) + assert.NotNil(t, err2, "") + +} diff --git a/src/ui/api/repository.go b/src/ui/api/repository.go index bfc247ea6..fcfd90e66 100644 --- a/src/ui/api/repository.go +++ b/src/ui/api/repository.go @@ -228,6 +228,7 @@ func (ra *RepositoryAPI) Delete() { } if config.WithNotary() { + var digest string signedTags := make(map[string]struct{}) targets, err := getNotaryTargets(user, repoName) if err != nil { @@ -235,10 +236,21 @@ func (ra *RepositoryAPI) Delete() { log.Warningf("Failed to check signature status of repository: %s for deletion, there maybe orphaned targets in Notary.", repoName) } for _, tgt := range targets { - signedTags[tgt.Tag] = struct{}{} + digest, err = notary.DigestFromTarget(tgt) + if err != nil { + log.Errorf("Failed to get disgest from target, error: %v", err) + ra.CustomAbort(http.StatusInternalServerError, err.Error()) + } + signedTags[digest] = struct{}{} } for _, t := range tags { - if _, ok = signedTags[t]; ok { + digest, _, err := rc.ManifestExist(t) + if err != nil { + log.Errorf("Failed to Check the digest of tag: %s, error: %v", t, err.Error()) + ra.CustomAbort(http.StatusInternalServerError, err.Error()) + } + log.Debugf("Tag: %s, digest: %s", t, digest) + if _, ok = signedTags[digest]; ok { log.Errorf("Found signed tag, repostory: %s, tag: %s, deletion will be canceled", repoName, t) ra.CustomAbort(http.StatusPreconditionFailed, fmt.Sprintf("tag %s is signed", t)) } diff --git a/src/vendor/github.com/opencontainers/go-digest/CONTRIBUTING.md b/src/vendor/github.com/opencontainers/go-digest/CONTRIBUTING.md new file mode 100644 index 000000000..e4d962ac1 --- /dev/null +++ b/src/vendor/github.com/opencontainers/go-digest/CONTRIBUTING.md @@ -0,0 +1,72 @@ +# Contributing to Docker open source projects + +Want to hack on this project? Awesome! Here are instructions to get you started. + +This project is a part of the [Docker](https://www.docker.com) project, and follows +the same rules and principles. If you're already familiar with the way +Docker does things, you'll feel right at home. + +Otherwise, go read Docker's +[contributions guidelines](https://github.com/docker/docker/blob/master/CONTRIBUTING.md), +[issue triaging](https://github.com/docker/docker/blob/master/project/ISSUE-TRIAGE.md), +[review process](https://github.com/docker/docker/blob/master/project/REVIEWING.md) and +[branches and tags](https://github.com/docker/docker/blob/master/project/BRANCHES-AND-TAGS.md). + +For an in-depth description of our contribution process, visit the +contributors guide: [Understand how to contribute](https://docs.docker.com/opensource/workflow/make-a-contribution/) + +### Sign your work + +The sign-off is a simple line at the end of the explanation for the patch. Your +signature certifies that you wrote the patch or otherwise have the right to pass +it on as an open-source patch. The rules are pretty simple: if you can certify +the below (from [developercertificate.org](http://developercertificate.org/)): + +``` +Developer Certificate of Origin +Version 1.1 + +Copyright (C) 2004, 2006 The Linux Foundation and its contributors. +1 Letterman Drive +Suite D4700 +San Francisco, CA, 94129 + +Everyone is permitted to copy and distribute verbatim copies of this +license document, but changing it is not allowed. + + +Developer's Certificate of Origin 1.1 + +By making a contribution to this project, I certify that: + +(a) The contribution was created in whole or in part by me and I + have the right to submit it under the open source license + indicated in the file; or + +(b) The contribution is based upon previous work that, to the best + of my knowledge, is covered under an appropriate open source + license and I have the right under that license to submit that + work with modifications, whether created in whole or in part + by me, under the same open source license (unless I am + permitted to submit under a different license), as indicated + in the file; or + +(c) The contribution was provided directly to me by some other + person who certified (a), (b) or (c) and I have not modified + it. + +(d) I understand and agree that this project and the contribution + are public and that a record of the contribution (including all + personal information I submit with it, including my sign-off) is + maintained indefinitely and may be redistributed consistent with + this project or the open source license(s) involved. +``` + +Then you just add a line to every git commit message: + + Signed-off-by: Joe Smith + +Use your real name (sorry, no pseudonyms or anonymous contributions.) + +If you set your `user.name` and `user.email` git configs, you can sign your +commit automatically with `git commit -s`. diff --git a/src/vendor/github.com/opencontainers/go-digest/LICENSE.code b/src/vendor/github.com/opencontainers/go-digest/LICENSE.code new file mode 100644 index 000000000..0ea3ff81e --- /dev/null +++ b/src/vendor/github.com/opencontainers/go-digest/LICENSE.code @@ -0,0 +1,191 @@ + + Apache License + Version 2.0, January 2004 + https://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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If the provision + cannot be reformed, it shall be severed from this Public License + without affecting the enforceability of the remaining terms and + conditions. + + c. No term or condition of this Public License will be waived and no + failure to comply consented to unless expressly agreed to by the + Licensor. + + d. Nothing in this Public License constitutes or may be interpreted + as a limitation upon, or waiver of, any privileges and immunities + that apply to the Licensor or You, including from the legal + processes of any jurisdiction or authority. + + +======================================================================= + +Creative Commons is not a party to its public licenses. +Notwithstanding, Creative Commons may elect to apply one of its public +licenses to material it publishes and in those instances will be +considered the "Licensor." Except for the limited purpose of indicating +that material is shared under a Creative Commons public license or as +otherwise permitted by the Creative Commons policies published at +creativecommons.org/policies, Creative Commons does not authorize the +use of the trademark "Creative Commons" or any other trademark or logo +of Creative Commons without its prior written consent including, +without limitation, in connection with any unauthorized modifications +to any of its public licenses or any other arrangements, +understandings, or agreements concerning use of licensed material. For +the avoidance of doubt, this paragraph does not form part of the public +licenses. + +Creative Commons may be contacted at creativecommons.org. diff --git a/src/vendor/github.com/opencontainers/go-digest/MAINTAINERS b/src/vendor/github.com/opencontainers/go-digest/MAINTAINERS new file mode 100644 index 000000000..42a29795d --- /dev/null +++ b/src/vendor/github.com/opencontainers/go-digest/MAINTAINERS @@ -0,0 +1,9 @@ +Aaron Lehmann (@aaronlehmann) +Brandon Philips (@philips) +Brendan Burns (@brendandburns) +Derek McGowan (@dmcgowan) +Jason Bouzane (@jbouzane) +John Starks (@jstarks) +Jonathan Boulle (@jonboulle) +Stephen Day (@stevvooe) +Vincent Batts (@vbatts) diff --git a/src/vendor/github.com/opencontainers/go-digest/README.md b/src/vendor/github.com/opencontainers/go-digest/README.md new file mode 100644 index 000000000..0f5a04092 --- /dev/null +++ b/src/vendor/github.com/opencontainers/go-digest/README.md @@ -0,0 +1,104 @@ +# go-digest + +[![GoDoc](https://godoc.org/github.com/opencontainers/go-digest?status.svg)](https://godoc.org/github.com/opencontainers/go-digest) [![Go Report Card](https://goreportcard.com/badge/github.com/opencontainers/go-digest)](https://goreportcard.com/report/github.com/opencontainers/go-digest) [![Build Status](https://travis-ci.org/opencontainers/go-digest.svg?branch=master)](https://travis-ci.org/opencontainers/go-digest) + +Common digest package used across the container ecosystem. + +Please see the [godoc](https://godoc.org/github.com/opencontainers/go-digest) for more information. + +# What is a digest? + +A digest is just a hash. + +The most common use case for a digest is to create a content +identifier for use in [Content Addressable Storage](https://en.wikipedia.org/wiki/Content-addressable_storage) +systems: + +```go +id := digest.FromBytes([]byte("my content")) +``` + +In the example above, the id can be used to uniquely identify +the byte slice "my content". This allows two disparate applications +to agree on a verifiable identifier without having to trust one +another. + +An identifying digest can be verified, as follows: + +```go +if id != digest.FromBytes([]byte("my content")) { + return errors.New("the content has changed!") +} +``` + +A `Verifier` type can be used to handle cases where an `io.Reader` +makes more sense: + +```go +rd := getContent() +verifier := id.Verifier() +io.Copy(verifier, rd) + +if !verifier.Verified() { + return errors.New("the content has changed!") +} +``` + +Using [Merkle DAGs](https://en.wikipedia.org/wiki/Merkle_tree), this +can power a rich, safe, content distribution system. + +# Usage + +While the [godoc](https://godoc.org/github.com/opencontainers/go-digest) is +considered the best resource, a few important items need to be called +out when using this package. + +1. Make sure to import the hash implementations into your application + or the package will panic. You should have something like the + following in the main (or other entrypoint) of your application: + + ```go + import ( + _ "crypto/sha256" + _ "crypto/sha512" + ) + ``` + This may seem inconvenient but it allows you replace the hash + implementations with others, such as https://github.com/stevvooe/resumable. + +2. Even though `digest.Digest` may be assemable as a string, _always_ + verify your input with `digest.Parse` or use `Digest.Validate` + when accepting untrusted input. While there are measures to + avoid common problems, this will ensure you have valid digests + in the rest of your application. + +# Stability + +The Go API, at this stage, is considered stable, unless otherwise noted. + +As always, before using a package export, read the [godoc](https://godoc.org/github.com/opencontainers/go-digest). + +# Contributing + +This package is considered fairly complete. It has been in production +in thousands (millions?) of deployments and is fairly battle-hardened. +New additions will be met with skepticism. If you think there is a +missing feature, please file a bug clearly describing the problem and +the alternatives you tried before submitting a PR. + +# Reporting security issues + +Please DO NOT file a public issue, instead send your report privately to +security@opencontainers.org. + +The maintainers take security seriously. If you discover a security issue, +please bring it to their attention right away! + +If you are reporting a security issue, do not create an issue or file a pull +request on GitHub. Instead, disclose the issue responsibly by sending an email +to security@opencontainers.org (which is inhabited only by the maintainers of +the various OCI projects). + +# Copyright and license + +Copyright © 2016 Docker, Inc. All rights reserved, except as follows. Code is released under the [Apache 2.0 license](LICENSE.code). This `README.md` file and the [`CONTRIBUTING.md`](CONTRIBUTING.md) file are licensed under the Creative Commons Attribution 4.0 International License under the terms and conditions set forth in the file [`LICENSE.docs`](LICENSE.docs). You may obtain a duplicate copy of the same license, titled CC BY-SA 4.0, at http://creativecommons.org/licenses/by-sa/4.0/. diff --git a/src/vendor/github.com/opencontainers/go-digest/algorithm.go b/src/vendor/github.com/opencontainers/go-digest/algorithm.go new file mode 100644 index 000000000..bdff42d92 --- /dev/null +++ b/src/vendor/github.com/opencontainers/go-digest/algorithm.go @@ -0,0 +1,158 @@ +// Copyright 2017 Docker, Inc. +// +// 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 +// +// https://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 digest + +import ( + "crypto" + "fmt" + "hash" + "io" +) + +// Algorithm identifies and implementation of a digester by an identifier. +// Note the that this defines both the hash algorithm used and the string +// encoding. +type Algorithm string + +// supported digest types +const ( + SHA256 Algorithm = "sha256" // sha256 with hex encoding + SHA384 Algorithm = "sha384" // sha384 with hex encoding + SHA512 Algorithm = "sha512" // sha512 with hex encoding + + // Canonical is the primary digest algorithm used with the distribution + // project. Other digests may be used but this one is the primary storage + // digest. + Canonical = SHA256 +) + +var ( + // TODO(stevvooe): Follow the pattern of the standard crypto package for + // registration of digests. Effectively, we are a registerable set and + // common symbol access. + + // algorithms maps values to hash.Hash implementations. Other algorithms + // may be available but they cannot be calculated by the digest package. + algorithms = map[Algorithm]crypto.Hash{ + SHA256: crypto.SHA256, + SHA384: crypto.SHA384, + SHA512: crypto.SHA512, + } +) + +// Available returns true if the digest type is available for use. If this +// returns false, Digester and Hash will return nil. +func (a Algorithm) Available() bool { + h, ok := algorithms[a] + if !ok { + return false + } + + // check availability of the hash, as well + return h.Available() +} + +func (a Algorithm) String() string { + return string(a) +} + +// Size returns number of bytes returned by the hash. +func (a Algorithm) Size() int { + h, ok := algorithms[a] + if !ok { + return 0 + } + return h.Size() +} + +// Set implemented to allow use of Algorithm as a command line flag. +func (a *Algorithm) Set(value string) error { + if value == "" { + *a = Canonical + } else { + // just do a type conversion, support is queried with Available. + *a = Algorithm(value) + } + + if !a.Available() { + return ErrDigestUnsupported + } + + return nil +} + +// Digester returns a new digester for the specified algorithm. If the algorithm +// does not have a digester implementation, nil will be returned. This can be +// checked by calling Available before calling Digester. +func (a Algorithm) Digester() Digester { + return &digester{ + alg: a, + hash: a.Hash(), + } +} + +// Hash returns a new hash as used by the algorithm. If not available, the +// method will panic. Check Algorithm.Available() before calling. +func (a Algorithm) Hash() hash.Hash { + if !a.Available() { + // Empty algorithm string is invalid + if a == "" { + panic(fmt.Sprintf("empty digest algorithm, validate before calling Algorithm.Hash()")) + } + + // NOTE(stevvooe): A missing hash is usually a programming error that + // must be resolved at compile time. We don't import in the digest + // package to allow users to choose their hash implementation (such as + // when using stevvooe/resumable or a hardware accelerated package). + // + // Applications that may want to resolve the hash at runtime should + // call Algorithm.Available before call Algorithm.Hash(). + panic(fmt.Sprintf("%v not available (make sure it is imported)", a)) + } + + return algorithms[a].New() +} + +// FromReader returns the digest of the reader using the algorithm. +func (a Algorithm) FromReader(rd io.Reader) (Digest, error) { + digester := a.Digester() + + if _, err := io.Copy(digester.Hash(), rd); err != nil { + return "", err + } + + return digester.Digest(), nil +} + +// FromBytes digests the input and returns a Digest. +func (a Algorithm) FromBytes(p []byte) Digest { + digester := a.Digester() + + if _, err := digester.Hash().Write(p); err != nil { + // Writes to a Hash should never fail. None of the existing + // hash implementations in the stdlib or hashes vendored + // here can return errors from Write. Having a panic in this + // condition instead of having FromBytes return an error value + // avoids unnecessary error handling paths in all callers. + panic("write to hash function returned error: " + err.Error()) + } + + return digester.Digest() +} + +// FromString digests the string input and returns a Digest. +func (a Algorithm) FromString(s string) Digest { + return a.FromBytes([]byte(s)) +} diff --git a/src/vendor/github.com/opencontainers/go-digest/digest.go b/src/vendor/github.com/opencontainers/go-digest/digest.go new file mode 100644 index 000000000..69e1d2b54 --- /dev/null +++ b/src/vendor/github.com/opencontainers/go-digest/digest.go @@ -0,0 +1,154 @@ +// Copyright 2017 Docker, Inc. +// +// 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 +// +// https://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 digest + +import ( + "fmt" + "hash" + "io" + "regexp" + "strings" +) + +// Digest allows simple protection of hex formatted digest strings, prefixed +// by their algorithm. Strings of type Digest have some guarantee of being in +// the correct format and it provides quick access to the components of a +// digest string. +// +// The following is an example of the contents of Digest types: +// +// sha256:7173b809ca12ec5dee4506cd86be934c4596dd234ee82c0662eac04a8c2c71dc +// +// This allows to abstract the digest behind this type and work only in those +// terms. +type Digest string + +// NewDigest returns a Digest from alg and a hash.Hash object. +func NewDigest(alg Algorithm, h hash.Hash) Digest { + return NewDigestFromBytes(alg, h.Sum(nil)) +} + +// NewDigestFromBytes returns a new digest from the byte contents of p. +// Typically, this can come from hash.Hash.Sum(...) or xxx.SumXXX(...) +// functions. This is also useful for rebuilding digests from binary +// serializations. +func NewDigestFromBytes(alg Algorithm, p []byte) Digest { + return Digest(fmt.Sprintf("%s:%x", alg, p)) +} + +// NewDigestFromHex returns a Digest from alg and a the hex encoded digest. +func NewDigestFromHex(alg, hex string) Digest { + return Digest(fmt.Sprintf("%s:%s", alg, hex)) +} + +// DigestRegexp matches valid digest types. +var DigestRegexp = regexp.MustCompile(`[a-zA-Z0-9-_+.]+:[a-fA-F0-9]+`) + +// DigestRegexpAnchored matches valid digest types, anchored to the start and end of the match. +var DigestRegexpAnchored = regexp.MustCompile(`^` + DigestRegexp.String() + `$`) + +var ( + // ErrDigestInvalidFormat returned when digest format invalid. + ErrDigestInvalidFormat = fmt.Errorf("invalid checksum digest format") + + // ErrDigestInvalidLength returned when digest has invalid length. + ErrDigestInvalidLength = fmt.Errorf("invalid checksum digest length") + + // ErrDigestUnsupported returned when the digest algorithm is unsupported. + ErrDigestUnsupported = fmt.Errorf("unsupported digest algorithm") +) + +// Parse parses s and returns the validated digest object. An error will +// be returned if the format is invalid. +func Parse(s string) (Digest, error) { + d := Digest(s) + return d, d.Validate() +} + +// FromReader consumes the content of rd until io.EOF, returning canonical digest. +func FromReader(rd io.Reader) (Digest, error) { + return Canonical.FromReader(rd) +} + +// FromBytes digests the input and returns a Digest. +func FromBytes(p []byte) Digest { + return Canonical.FromBytes(p) +} + +// FromString digests the input and returns a Digest. +func FromString(s string) Digest { + return Canonical.FromString(s) +} + +// Validate checks that the contents of d is a valid digest, returning an +// error if not. +func (d Digest) Validate() error { + s := string(d) + + i := strings.Index(s, ":") + + // validate i then run through regexp + if i < 0 || i+1 == len(s) || !DigestRegexpAnchored.MatchString(s) { + return ErrDigestInvalidFormat + } + + algorithm := Algorithm(s[:i]) + if !algorithm.Available() { + return ErrDigestUnsupported + } + + // Digests much always be hex-encoded, ensuring that their hex portion will + // always be size*2 + if algorithm.Size()*2 != len(s[i+1:]) { + return ErrDigestInvalidLength + } + + return nil +} + +// Algorithm returns the algorithm portion of the digest. This will panic if +// the underlying digest is not in a valid format. +func (d Digest) Algorithm() Algorithm { + return Algorithm(d[:d.sepIndex()]) +} + +// Verifier returns a writer object that can be used to verify a stream of +// content against the digest. If the digest is invalid, the method will panic. +func (d Digest) Verifier() Verifier { + return hashVerifier{ + hash: d.Algorithm().Hash(), + digest: d, + } +} + +// Hex returns the hex digest portion of the digest. This will panic if the +// underlying digest is not in a valid format. +func (d Digest) Hex() string { + return string(d[d.sepIndex()+1:]) +} + +func (d Digest) String() string { + return string(d) +} + +func (d Digest) sepIndex() int { + i := strings.Index(string(d), ":") + + if i < 0 { + panic(fmt.Sprintf("no ':' separator in digest %q", d)) + } + + return i +} diff --git a/src/vendor/github.com/opencontainers/go-digest/digester.go b/src/vendor/github.com/opencontainers/go-digest/digester.go new file mode 100644 index 000000000..36fa2728e --- /dev/null +++ b/src/vendor/github.com/opencontainers/go-digest/digester.go @@ -0,0 +1,39 @@ +// Copyright 2017 Docker, Inc. +// +// 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 +// +// https://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 digest + +import "hash" + +// Digester calculates the digest of written data. Writes should go directly +// to the return value of Hash, while calling Digest will return the current +// value of the digest. +type Digester interface { + Hash() hash.Hash // provides direct access to underlying hash instance. + Digest() Digest +} + +// digester provides a simple digester definition that embeds a hasher. +type digester struct { + alg Algorithm + hash hash.Hash +} + +func (d *digester) Hash() hash.Hash { + return d.hash +} + +func (d *digester) Digest() Digest { + return NewDigest(d.alg, d.hash) +} diff --git a/src/vendor/github.com/opencontainers/go-digest/doc.go b/src/vendor/github.com/opencontainers/go-digest/doc.go new file mode 100644 index 000000000..491ea1ef1 --- /dev/null +++ b/src/vendor/github.com/opencontainers/go-digest/doc.go @@ -0,0 +1,56 @@ +// Copyright 2017 Docker, Inc. +// +// 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 +// +// https://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 digest provides a generalized type to opaquely represent message +// digests and their operations within the registry. The Digest type is +// designed to serve as a flexible identifier in a content-addressable system. +// More importantly, it provides tools and wrappers to work with +// hash.Hash-based digests with little effort. +// +// Basics +// +// The format of a digest is simply a string with two parts, dubbed the +// "algorithm" and the "digest", separated by a colon: +// +// : +// +// An example of a sha256 digest representation follows: +// +// sha256:7173b809ca12ec5dee4506cd86be934c4596dd234ee82c0662eac04a8c2c71dc +// +// In this case, the string "sha256" is the algorithm and the hex bytes are +// the "digest". +// +// Because the Digest type is simply a string, once a valid Digest is +// obtained, comparisons are cheap, quick and simple to express with the +// standard equality operator. +// +// Verification +// +// The main benefit of using the Digest type is simple verification against a +// given digest. The Verifier interface, modeled after the stdlib hash.Hash +// interface, provides a common write sink for digest verification. After +// writing is complete, calling the Verifier.Verified method will indicate +// whether or not the stream of bytes matches the target digest. +// +// Missing Features +// +// In addition to the above, we intend to add the following features to this +// package: +// +// 1. A Digester type that supports write sink digest calculation. +// +// 2. Suspend and resume of ongoing digest calculations to support efficient digest verification in the registry. +// +package digest diff --git a/src/vendor/github.com/opencontainers/go-digest/verifiers.go b/src/vendor/github.com/opencontainers/go-digest/verifiers.go new file mode 100644 index 000000000..32125e918 --- /dev/null +++ b/src/vendor/github.com/opencontainers/go-digest/verifiers.go @@ -0,0 +1,45 @@ +// Copyright 2017 Docker, Inc. +// +// 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 +// +// https://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 digest + +import ( + "hash" + "io" +) + +// Verifier presents a general verification interface to be used with message +// digests and other byte stream verifications. Users instantiate a Verifier +// from one of the various methods, write the data under test to it then check +// the result with the Verified method. +type Verifier interface { + io.Writer + + // Verified will return true if the content written to Verifier matches + // the digest. + Verified() bool +} + +type hashVerifier struct { + digest Digest + hash hash.Hash +} + +func (hv hashVerifier) Write(p []byte) (n int, err error) { + return hv.hash.Write(p) +} + +func (hv hashVerifier) Verified() bool { + return hv.digest == NewDigest(hv.digest.Algorithm(), hv.hash) +} diff --git a/src/vendor/vendor.json b/src/vendor/vendor.json index 978164276..ddd55a296 100644 --- a/src/vendor/vendor.json +++ b/src/vendor/vendor.json @@ -394,6 +394,12 @@ "revision": "7283ca79f35edb89bc1b4ecae7f86a3680ce737f", "revisionTime": "2017-02-20T20:24:08Z" }, + { + "checksumSHA1": "qj7IAU2RRq99oaIEGH0eLfX/UcM=", + "path": "github.com/opencontainers/go-digest", + "revision": "aa2ec055abd10d26d539eb630a92241b781ce4bc", + "revisionTime": "2017-01-31T01:35:07Z" + }, { "checksumSHA1": "LuFv4/jlrmFNnDb/5SCSEPAM9vU=", "path": "github.com/pmezard/go-difflib/difflib",