97 lines
3.1 KiB
Go
97 lines
3.1 KiB
Go
// Copyright (c) HashiCorp, Inc.
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// SPDX-License-Identifier: MPL-2.0
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package pki
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import (
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"context"
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"crypto"
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"encoding/pem"
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"errors"
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"fmt"
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"github.com/hashicorp/vault/sdk/helper/certutil"
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"github.com/hashicorp/vault/sdk/helper/errutil"
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)
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func comparePublicKey(sc *storageContext, key *keyEntry, publicKey crypto.PublicKey) (bool, error) {
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publicKeyForKeyEntry, err := getPublicKey(sc.Context, sc.Backend, key)
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if err != nil {
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return false, err
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}
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return certutil.ComparePublicKeysAndType(publicKeyForKeyEntry, publicKey)
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}
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func getPublicKey(ctx context.Context, b *backend, key *keyEntry) (crypto.PublicKey, error) {
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if key.PrivateKeyType == certutil.ManagedPrivateKey {
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keyId, err := extractManagedKeyId([]byte(key.PrivateKey))
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if err != nil {
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return nil, err
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}
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return getManagedKeyPublicKey(ctx, b, keyId)
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}
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signer, _, _, err := getSignerFromKeyEntryBytes(key)
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if err != nil {
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return nil, err
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}
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return signer.Public(), nil
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}
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func getSignerFromKeyEntryBytes(key *keyEntry) (crypto.Signer, certutil.BlockType, *pem.Block, error) {
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if key.PrivateKeyType == certutil.UnknownPrivateKey {
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return nil, certutil.UnknownBlock, nil, errutil.InternalError{Err: fmt.Sprintf("unsupported unknown private key type for key: %s (%s)", key.ID, key.Name)}
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}
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if key.PrivateKeyType == certutil.ManagedPrivateKey {
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return nil, certutil.UnknownBlock, nil, errutil.InternalError{Err: fmt.Sprintf("can not get a signer from a managed key: %s (%s)", key.ID, key.Name)}
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}
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bytes, blockType, blk, err := getSignerFromBytes([]byte(key.PrivateKey))
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if err != nil {
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return nil, certutil.UnknownBlock, nil, errutil.InternalError{Err: fmt.Sprintf("failed parsing key entry bytes for key id: %s (%s): %s", key.ID, key.Name, err.Error())}
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}
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return bytes, blockType, blk, nil
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}
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func getSignerFromBytes(keyBytes []byte) (crypto.Signer, certutil.BlockType, *pem.Block, error) {
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pemBlock, _ := pem.Decode(keyBytes)
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if pemBlock == nil {
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return nil, certutil.UnknownBlock, pemBlock, errutil.InternalError{Err: "no data found in PEM block"}
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}
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signer, blk, err := certutil.ParseDERKey(pemBlock.Bytes)
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if err != nil {
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return nil, certutil.UnknownBlock, pemBlock, errutil.InternalError{Err: fmt.Sprintf("failed to parse PEM block: %s", err.Error())}
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}
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return signer, blk, pemBlock, nil
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}
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func getPublicKeyFromBytes(keyBytes []byte) (crypto.PublicKey, error) {
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signer, _, _, err := getSignerFromBytes(keyBytes)
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if err != nil {
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return nil, errutil.InternalError{Err: fmt.Sprintf("failed parsing key bytes: %s", err.Error())}
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}
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return signer.Public(), nil
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}
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func importKeyFromBytes(sc *storageContext, keyValue string, keyName string) (*keyEntry, bool, error) {
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signer, _, _, err := getSignerFromBytes([]byte(keyValue))
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if err != nil {
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return nil, false, err
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}
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privateKeyType := certutil.GetPrivateKeyTypeFromSigner(signer)
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if privateKeyType == certutil.UnknownPrivateKey {
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return nil, false, errors.New("unsupported private key type within pem bundle")
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}
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key, existed, err := sc.importKey(keyValue, keyName, privateKeyType)
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if err != nil {
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return nil, false, err
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}
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return key, existed, nil
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}
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