// Copyright 2018 Google LLC
//
// 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 amppackager

import (
	"crypto/sha256"
	"crypto/x509"
	"encoding/base64"
)

// CertURLPrefix must start without a slash, for PackagerBase's sake.
const CertURLPrefix = "amppkg/cert"

// CertName returns the basename for the given cert, as served by this
// packager's cert cache. Should be stable and unique (e.g.
// content-addressing). Clients should url.PathEscape this, just in case its
// format changes to need escaping in the future.
func CertName(cert *x509.Certificate) string {
	sum := sha256.Sum256(cert.Raw)
	return base64.URLEncoding.EncodeToString(sum[:])
}

// Copyright 2018 Google LLC
//
// 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 amppackager

import (
	"crypto/sha256"
	"crypto/x509"
	"encoding/base64"
)

// CertURLPrefix must start without a slash, for PackagerBase's sake.
const CertURLPrefix = "amppkg/cert"

// CertName returns the basename for the given cert, as served by this
// packager's cert cache. Should be stable and unique (e.g.
// content-addressing). Clients should url.PathEscape this, just in case its
// format changes to need escaping in the future.
func CertName(cert *x509.Certificate) string {
	sum := sha256.Sum256(cert.Raw)
	return base64.RawURLEncoding.EncodeToString(sum[:])
}

Remove padding characters from cert URL.
Remove padding characters from cert URL.

This makes the URL prettier by removing reserved characters, and matches
the behavior of the planned AMP CDN URL.
