Previously we returned an HTTP 500 "error canonicalizing entry" error if
Rekor was unable to parse or verify the proposed content of a new log
entry. This adds a new error type ValidationError that allows
implementers of the Canonicalize method to delineate between internal,
transient errors and errors that clients can rectify.

With this patch, errors parsing or validating (provided or referenced)
artifacts will return an HTTP 400 message to the client with a message
about the issue.

Fixes: #362

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

* Refactor PKI factory and add type checking

This allows for more DRY addition of new PKI types, and stricter
type checking. This also allows for simpler enumeration of
supported PKI formats which will be used in further updates to
simplify the CLI codebase.

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

* revamp CLI flags; support different versions for upload

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

* Add Alpine Package type

This adds support for the alpine package format used by Alpine Linux,
which is the concatenation of three tgz files (signature, control data,
and then the actual package files).

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

* use shaFlag for --artifact-hash

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

* change arg type to PKIFormat

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

* defer type-specific validation logic to type code (instead of in CLI); also use CliLogger throughout CLI

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

* refactor factory code

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

* review comments

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

* Clean up EntryImpl interface

Make the interface clearer by removing ambiguity around who and when an
entry should have external objects fetched or validated.

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

* update pluggable type README

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

* Refactor PKI factory and add type checking

This allows for more DRY addition of new PKI types, and stricter
type checking. This also allows for simpler enumeration of
supported PKI formats which will be used in further updates to
simplify the CLI codebase.

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

* revamp CLI flags; support different versions for upload

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

* Add Alpine Package type

This adds support for the alpine package format used by Alpine Linux,
which is the concatenation of three tgz files (signature, control data,
and then the actual package files).

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

* use shaFlag for --artifact-hash

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

* change arg type to PKIFormat

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

* defer type-specific validation logic to type code (instead of in CLI); also use CliLogger throughout CLI

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

* refactor factory code

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

* review comments

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

Signed-off-by: Dan Lorenc <dlorenc@google.com>

Signed-off-by: Dan Lorenc <lorenc.d@gmail.com>

Signed-off-by: Dan Lorenc <dlorenc@google.com>

* Added Helm type

Signed-off-by: Andrew Block <andy.block@gmail.com>

* Cleaned up helm type

Signed-off-by: Andrew Block <andy.block@gmail.com>

* Correct Helm schema required fields

Signed-off-by: Andrew Block <andy.block@gmail.com>

* Regenerated Helm schema

Signed-off-by: Andrew Block <andy.block@gmail.com>

* Adopt new signing/verification APIs from sigstore

This uses the new APIs introduced in sigstore/sigstore/pkg/signature and
removes most of the calls directly to the golang crypto APIs.

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

* Move GetRekorClient into util directory

Since other sigstore projects are using GetRekorClient, this moves it
into the pkg/util directory so that the number of dependencies this
brings with it can be minimized.

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

* move to pkg/client

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

Signed-off-by: Dan Lorenc <dlorenc@google.com>

Signed-off-by: Asra Ali <asraa@google.com>

This adds support for the alpine package format used by Alpine Linux,
which is the concatenation of three tgz files (signature, control data,
and then the actual package files).

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

* upload all generated timestamps

Signed-off-by: Asra Ali <asraa@google.com>

* address bazooka comments

Signed-off-by: Asra Ali <asraa@google.com>

* simplify params

Signed-off-by: Asra Ali <asraa@google.com>

* address changes

Signed-off-by: Asra Ali <asraa@google.com>

* forgot to run swagger

Signed-off-by: Asra Ali <asraa@google.com>

Signed-off-by: Asra Ali <asraa@google.com>

Signed-off-by: Appu Goundan <appu@google.com>

Signed-off-by: Appu Goundan <appu@google.com>

* Convert STH to checkpoint format

This switches away from sending the (now deprecated) Trillian LogRootV1
format over to the checkpoint format documented at
https://github.com/google/trillian-examples/tree/master/formats/log



Fixes: #313

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

This adds an "Attestation" method to the entry interface. Entries can
return an attestation that they would like to store.

The attestations are currently stored in GCS, but it supports any blob store.
The feature is turned off with a flag, and we can set a max size as well.

Signed-off-by: Dan Lorenc <dlorenc@google.com>

Signed-off-by: Dan Lorenc <dlorenc@google.com>

This uses a custom fork of in-toto-golang because not all the changes are merged
in one place.

Signed-off-by: Dan Lorenc <dlorenc@google.com>

This saves an if err != nil... check.

Signed-off-by: Dan Lorenc <dlorenc@google.com>

* Add timestamps

Signed-off-by: Asra Ali <asraa@google.com>

* change

Signed-off-by: Asra Ali <asraa@google.com>

* address comments

Signed-off-by: Asra Ali <asraa@google.com>

* address comments

Signed-off-by: Asra Ali <asraa@google.com>

* fix binary writer

Signed-off-by: Asra Ali <asraa@google.com>

* add tsa

Signed-off-by: Asra Ali <asraa@google.com>

* distangle cert chain creation from new signer

Signed-off-by: Asra Ali <asraa@google.com>

* revert some now unncessary changes

Signed-off-by: Asra Ali <asraa@google.com>

* cert chain 404

Signed-off-by: Asra Ali <asraa@google.com>

* fix

Signed-off-by: Asra Ali <asraa@google.com>

As we have moved away from the rekor.dev domain, switching over to
rekor.sigstore.dev for the public instance. api.sigstore.dev still works
as an alias.

Fixes #305

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

* Add Log ID to LogEntry field

Since the signed entry timestamp (SET) will be able to prove insertion into the log, adding the log ID (aka public key SHA256 hash) makes it easier to know which log the entry came from. 

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

* GetLogByIndexHandler returns 404 for missing index

GRPC return codes have changed after switching the Trillian GRPC calls
due to recent changes; therefore we need to adapt for InvalidArgument
which should be returned as a 404 Not Found error to callers.

Fixes #296

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

Signed-off-by: Priya Wadhwa <priyawadhwa@google.com>

* Add sha256 prefix to index keys for artifact hashes

This change adds the `sha256:` prefix to index values that are created to simplify searching the transparency log for artifacts. In case we shift to using a different hashing algorithm in the future, this will provide a way to specify it.

Fixes #289

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

* Add signature to LogEntry for offline verification

Also add an integration test for this.

Signed-off-by: Priya Wadhwa <priyawadhwa@google.com>

* Address code review comments:
- Canonicalize payload before signing it
- Change name of signature to signedEntryTimestamp
- move signedEntryTimestamp and inclusionProof into separate Verification field in LogEntry

Signed-off-by: Priya Wadhwa <priyawadhwa@google.com>

* Create helper func for extracting log entry

Signed-off-by: Priya Wadhwa <priyawadhwa@google.com>

* Add info around verifying signedEntryTimestamp as comments in openapi.yaml

Signed-off-by: Priya Wadhwa <priyawadhwa@google.com>

* Generalize verification instructions

Signed-off-by: Priya Wadhwa <priyawadhwa@google.com>

Signed-off-by: Asra Ali <asraa@google.com>

Signed-off-by: Asra Ali <asraa@google.com>

* Improve code sharing in pluggable type support

This patch removes some of the duplicate logic from specific type implementations and moves it into the base design which hopefully makes writing pluggable types a bit easier.

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

* Update trillian dependency to master

This removes calls to the trillian verifier and replaces them with calls to a new rekor verify package!
The `verify` package currently only verifies the signed log root.

Signed-off-by: Priya Wadhwa <priyawadhwa@google.com>

* Fix lint

Signed-off-by: Priya Wadhwa <priyawadhwa@google.com>

* Add verifier back in and update trillian images

Signed-off-by: Priya Wadhwa <priyawadhwa@google.com>

* Make verify private

Signed-off-by: Priya Wadhwa <priyawadhwa@google.com>

* Address code review comments

Signed-off-by: Priya Wadhwa <priyawadhwa@google.com>

* Roll back to trillian v1.3.13

Signed-off-by: Priya Wadhwa <priyawadhwa@google.com>

* Pin trillian to latest commit

Signed-off-by: Priya Wadhwa <priyawadhwa@google.com>

* Add new type for JAR archives

This adds support for a new pluggable type that can extract signatures
from signed JAR files. Per the JAR spec, a special manifest file is
created with the digest hashes of all included content in the JAR file.
It is this special manifest file that is then signed, and included in a
file within the archive in PKCS7 format. The PKCS7 file also includes
the X509 certificate that can be used to verify the signed manifest file
inside of the JAR.

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

* Add signing package for signing within rekor

Signed-off-by: Priya Wadhwa <priyawadhwa@google.com>

* Remove public key from trillian and add in TODO for getting public key from Signer

Signed-off-by: Priya Wadhwa <priyawadhwa@google.com>

* Create signer flag and store signer in api struct

Signed-off-by: Priya Wadhwa <priyawadhwa@google.com>

* Remove public key from tlog in API, replace with a new pubkey tag

Signed-off-by: Priya Wadhwa <priyawadhwa@google.com>

* Make sure we can get the public key locally

Signed-off-by: Priya Wadhwa <priyawadhwa@google.com>

* Fix build error

Signed-off-by: Priya Wadhwa <priyawadhwa@google.com>

* Reuse cosign implementation of signing interface

Signed-off-by: Priya Wadhwa <priyawadhwa@google.com>

* fix lint

Signed-off-by: Priya Wadhwa <priyawadhwa@google.com>

* Add in-memory signer, store unmarshaled public key in api

Signed-off-by: Priya Wadhwa <priyawadhwa@google.com>

* Temporarily skip the log_info test, since we are now getting the public key from rekor and not trillian

Signed-off-by: Priya Wadhwa <priyawadhwa@google.com>

* Replace cosign import with sigstore

Signed-off-by: Priya Wadhwa <priyawadhwa@google.com>

* Add unit test for memory signer

Signed-off-by: Priya Wadhwa <priyawadhwa@google.com>

* Remove unnecessary code

Signed-off-by: Priya Wadhwa <priyawadhwa@google.com>

* skip test

Signed-off-by: Priya Wadhwa <priyawadhwa@google.com>

* Sign the signature for the signed log root ourselves

Signed-off-by: Priya Wadhwa <priyawadhwa@google.com>

* Include memory as a signer option for signer flag, make memory default

Signed-off-by: Priya Wadhwa <priyawadhwa@google.com>

* update boilerplate header and apply go fmt

Signed-off-by: Carlos Panato <ctadeu@gmail.com>

* lints: fix golangci-lint issues

Signed-off-by: Carlos Panato <ctadeu@gmail.com>

* updated based on feedback

Signed-off-by: Carlos Panato <ctadeu@gmail.com>

Signed-off-by: Asra Ali <asraa@google.com>

Signed-off-by: Asra Ali <asraa@google.com>

This is changing as part of the general trillian signature changes.
The trust model is still client -> database, our server trusts our
database so we can pass signed messages on directly to users without
double verification.

Signed-off-by: Dan Lorenc <dlorenc@google.com>

This patch removes the /api/v1/log/entries/{uuid}/proof endpoint. If you
have the UUID (aka the leaf Merkle hash), you likely want proof that the
content represented by that hash is included in the log. There's no need
for a separate /proof endpoint to deliver the same content.

This commit also ensures that the getLogEntryByIndex and
getLogEntryByUUID endpoints return an inclusion proof as part of their
response content. The search endpoint also now returns the inclusion
proof of all entries returned from the query.

With this patch, Rekor no longer uses the deprecated `GetLeavesByHash`
Trillian API.

Fixes #229

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>

Signed-off-by: Bob Callaway <bob.callaway@gmail.com>