78 lines
2.5 KiB
Go
78 lines
2.5 KiB
Go
/*
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Copyright 2023 The Dapr Authors
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package keyvault
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import (
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"sync"
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"github.com/Azure/azure-sdk-for-go/sdk/azcore/to"
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"github.com/Azure/azure-sdk-for-go/sdk/security/keyvault/azkeys"
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internals "github.com/dapr/kit/crypto"
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)
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var (
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validEncryptionAlgs map[string]struct{}
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validSignatureAlgs map[string]struct{}
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encryptionAlgsList []string
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signatureAlgsList []string
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// Used to initialize validEncryptionAlgs and validSignatureAlgs lazily when the first component of this kind is initialized
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algsParsed sync.Once
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)
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// GetJWKEncryptionAlgorithm returns a JSONWebKeyEncryptionAlgorithm constant is the algorithm is a supported one.
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func GetJWKEncryptionAlgorithm(algorithm string) *azkeys.EncryptionAlgorithm {
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// Special case for AES-CBC, since we treat A[NNN]CBC as having PKCS#7 padding, and A[NNN]CBC-NOPAD as not using padding
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switch algorithm {
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case internals.Algorithm_A128CBC, internals.Algorithm_A192CBC, internals.Algorithm_A256CBC:
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// Append "PAD", e.g. "A128CBCPAD"
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algorithm += "PAD"
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case internals.Algorithm_A128CBC_NOPAD, internals.Algorithm_A192CBC_NOPAD, internals.Algorithm_A256CBC_NOPAD:
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// Remove the "-NOPAD" suffix, e.g. "A128CBC"
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algorithm = algorithm[:len(algorithm)-6]
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}
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if _, ok := validEncryptionAlgs[algorithm]; ok {
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return to.Ptr(azkeys.EncryptionAlgorithm(algorithm))
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} else {
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return nil
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}
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}
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// GetJWKSignatureAlgorithm returns a JSONWebKeySignatureAlgorithm constant is the algorithm is a supported one.
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func GetJWKSignatureAlgorithm(algorithm string) *azkeys.SignatureAlgorithm {
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if _, ok := validSignatureAlgs[algorithm]; ok {
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return to.Ptr(azkeys.SignatureAlgorithm(algorithm))
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} else {
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return nil
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}
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}
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type algorithms interface {
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azkeys.EncryptionAlgorithm | azkeys.SignatureAlgorithm
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}
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// IsAlgorithmAsymmetric returns true if the algorithm identifier is asymmetric.
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func IsAlgorithmAsymmetric[T algorithms](algorithm T) bool {
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algStr := string(algorithm)
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switch algStr[0:2] {
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case "RS", "ES", "PS":
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// RSNULL is a reserved keyword
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return algStr != "RSNULL"
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default:
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return false
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}
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}
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