rebase: vendor dependencies for Vault API

Uses github.com/libopenstorage/secrets to communicate with Vault. This
removes the need for maintaining our own limited Vault APIs.

By adding the new dependency, several other packages got updated in the
process. Unused indirect dependencies have been removed from go.mod.

Signed-off-by: Niels de Vos <ndevos@redhat.com>

vendor/github.com/opencontainers/go-digest/.mailmap

@@ -1 +1,4 @@
+Aaron Lehmann <aaronl@vitelus.com> <aaron.lehmann@docker.com>
+Derek McGowan <derek@mcg.dev> <derek@mcgstyle.net>
 Stephen J Day <stephen.day@docker.com> <stevvooe@users.noreply.github.com>
+Haibing Zhou <zhouhaibing089@gmail.com>

vendor/github.com/opencontainers/go-digest/.pullapprove.yml

@@ -1,12 +1,28 @@
-approve_by_comment: true
-approve_regex: '^(Approved|lgtm|LGTM|:shipit:|:star:|:\+1:|:ship:)'
-reject_regex: ^Rejected
-reset_on_push: true
-author_approval: ignored
-signed_off_by:
-  required: true
-reviewers:
-  teams:
-  - go-digest-maintainers
-  name: default
+version: 2
+
+requirements:
+  signed_off_by:
+    required: true
+
+always_pending:
+  title_regex: '^WIP'
+  explanation: 'Work in progress...'
+
+group_defaults:
   required: 2
+  approve_by_comment:
+    enabled: true
+    approve_regex: '^LGTM'
+    reject_regex: '^Rejected'
+  reset_on_push:
+    enabled: true
+  author_approval:
+    ignored: true
+  conditions:
+    branches:
+      - master
+
+groups:
+  go-digest:
+    teams:
+      - go-digest-maintainers

vendor/github.com/opencontainers/go-digest/.travis.yml

@@ -1,4 +1,5 @@
 language: go
 go:
-  - 1.7
+  - 1.12.x
+  - 1.13.x
   - master

vendor/github.com/opencontainers/go-digest/LICENSE

@@ -176,6 +176,7 @@
 
    END OF TERMS AND CONDITIONS
 
+   Copyright 2019, 2020 OCI Contributors
    Copyright 2016 Docker, Inc.
 
    Licensed under the Apache License, Version 2.0 (the "License");

vendor/github.com/opencontainers/go-digest/MAINTAINERS

@@ -1,9 +1,5 @@
-Aaron Lehmann <aaron.lehmann@docker.com> (@aaronlehmann)
-Brandon Philips <brandon.philips@coreos.com> (@philips)
-Brendan Burns <bburns@microsoft.com> (@brendandburns)
 Derek McGowan <derek@mcgstyle.net> (@dmcgowan)
-Jason Bouzane <jbouzane@google.com> (@jbouzane)
-John Starks <jostarks@microsoft.com> (@jstarks)
-Jonathan Boulle <jon.boulle@coreos.com> (@jonboulle)
-Stephen Day <stephen.day@docker.com> (@stevvooe)
-Vincent Batts <vbatts@redhat.com> (@vbatts)
+Stephen Day <stevvooe@gmail.com> (@stevvooe)
+Vincent Batts <vbatts@hashbangbash.com> (@vbatts)
+Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp> (@AkihiroSuda)
+Sebastiaan van Stijn <github@gone.nl> (@thaJeztah)

vendor/github.com/opencontainers/go-digest/README.md

@@ -8,20 +8,16 @@ Please see the [godoc](https://godoc.org/github.com/opencontainers/go-digest) fo
 
 # What is a digest?
 
-A digest is just a hash.
+A digest is just a [hash](https://en.wikipedia.org/wiki/Hash_function).
 
-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:
+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.
+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:
 
@@ -31,8 +27,7 @@ if id != digest.FromBytes([]byte("my content")) {
 }
 ```
 
-A `Verifier` type can be used to handle cases where an `io.Reader`
-makes more sense:
+A `Verifier` type can be used to handle cases where an `io.Reader` makes more sense:
 
 ```go
 rd := getContent()
@@ -44,33 +39,28 @@ if !verifier.Verified() {
 }
 ```
 
-Using [Merkle DAGs](https://en.wikipedia.org/wiki/Merkle_tree), this
-can power a rich, safe, content distribution system.
+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.
+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:
+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"
+        _ "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.
+2. Even though `digest.Digest` may be assemblable 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.
+
+3. While alternative encodings of hash values (digests) are possible (for example, base64), this package deals exclusively with hex-encoded digests.
 
 # Stability
 
@@ -80,25 +70,27 @@ As always, before using a package export, read the [godoc](https://godoc.org/git
 
 # 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.
+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
+## Code of Conduct
 
-Please DO NOT file a public issue, instead send your report privately to
-security@opencontainers.org.
+Participation in the OpenContainers community is governed by [OpenContainer's Code of Conduct][code-of-conduct].
 
-The maintainers take security seriously. If you discover a security issue,
-please bring it to their attention right away!
+## Security
 
-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).
+If you find an issue, please follow the [security][security] protocol to report it.
 
 # 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/.
+Copyright © 2019, 2020 OCI Contributors
+Copyright © 2016 Docker, Inc.
+All rights reserved, except as follows.
+Code is released under the [Apache 2.0 license](LICENSE).
+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/.
+
+[security]: https://github.com/opencontainers/org/blob/master/security
+[code-of-conduct]: https://github.com/opencontainers/org/blob/master/CODE_OF_CONDUCT.md

vendor/github.com/opencontainers/go-digest/algorithm.go

@@ -1,3 +1,4 @@
+// Copyright 2019, 2020 OCI Contributors
 // Copyright 2017 Docker, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");

vendor/github.com/opencontainers/go-digest/digest.go

@@ -1,3 +1,4 @@
+// Copyright 2019, 2020 OCI Contributors
 // Copyright 2017 Docker, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");

vendor/github.com/opencontainers/go-digest/digester.go

@@ -1,3 +1,4 @@
+// Copyright 2019, 2020 OCI Contributors
 // Copyright 2017 Docker, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");

vendor/github.com/opencontainers/go-digest/doc.go

@@ -1,3 +1,4 @@
+// Copyright 2019, 2020 OCI Contributors
 // Copyright 2017 Docker, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
@@ -29,8 +30,13 @@
 //
 // 	sha256:7173b809ca12ec5dee4506cd86be934c4596dd234ee82c0662eac04a8c2c71dc
 //
-// In this case, the string "sha256" is the algorithm and the hex bytes are
-// the "digest".
+// The "algorithm" portion defines both the hashing algorithm used to calculate
+// the digest and the encoding of the resulting digest, which defaults to "hex"
+// if not otherwise specified. Currently, all supported algorithms have their
+// digests encoded in hex strings.
+//
+// In the example above, 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

vendor/github.com/opencontainers/go-digest/go.mod

@@ -0,0 +1,3 @@
+module github.com/opencontainers/go-digest
+
+go 1.13

vendor/github.com/opencontainers/go-digest/verifiers.go

@@ -1,3 +1,4 @@
+// Copyright 2019, 2020 OCI Contributors
 // Copyright 2017 Docker, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");