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crud.go
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crud.go
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package vault
import (
"context"
"crypto/ecdsa"
"crypto/elliptic"
"crypto/rand"
"crypto/x509"
"encoding/pem"
"errors"
"fmt"
"math/big"
"github.com/krixlion/dev_forum-auth/pkg/entity"
"github.com/krixlion/dev_forum-lib/str"
"github.com/krixlion/dev_forum-lib/tracing"
)
// GetRandom returns a random existing private key from the Vault.
func (db Vault) GetRandom(ctx context.Context) (entity.Key, error) {
ctx, span := db.tracer.Start(ctx, "vault.GetRandom")
defer span.End()
keyPaths, err := db.list(ctx, db.config.MountPath)
if err != nil {
return entity.Key{}, err
}
if len(keyPaths) <= 0 {
return entity.Key{}, errors.New("key not found")
}
n, err := rand.Int(rand.Reader, big.NewInt(int64(len(keyPaths))))
if err != nil {
return entity.Key{}, err
}
randomPath := keyPaths[n.Int64()]
secret, err := db.vault.Get(ctx, randomPath)
if err != nil {
tracing.SetSpanErr(span, err)
return entity.Key{}, err
}
parsed, err := parseSecret(secret)
if err != nil {
return entity.Key{}, err
}
return makeKey(randomPath, parsed)
}
// GetKeySet returns a slice of keys present in the Vault.
func (db Vault) GetKeySet(ctx context.Context) ([]entity.Key, error) {
ctx, span := db.tracer.Start(ctx, "vault.GetKeySet")
defer span.End()
keyPaths, err := db.list(ctx, db.config.MountPath)
if err != nil {
return nil, err
}
keys := []entity.Key{}
for _, path := range keyPaths {
secret, err := db.vault.Get(ctx, path)
if err != nil {
return nil, err
}
parsed, err := parseSecret(secret)
if err != nil {
return nil, err
}
key, err := makeKey(path, parsed)
if err != nil {
return nil, err
}
keys = append(keys, key)
}
return keys, nil
}
// list returns a slice containing all available paths in the Vault.
// They can be used to retrieve a key from the Vault.
func (db Vault) list(ctx context.Context, mountPath string) ([]string, error) {
ctx, span := db.tracer.Start(ctx, "vault.list")
defer span.End()
secret, err := db.client.Logical().ListWithContext(ctx, mountPath+"/metadata/")
if err != nil {
tracing.SetSpanErr(span, err)
return nil, err
}
// Check early in order to avoid unnecessary loop.
if secret == nil || secret.Data == nil {
return nil, nil
}
paths := make([]string, 0, len(secret.Data))
for _, pathLists := range secret.Data {
pathList, ok := pathLists.([]interface{})
if !ok {
err := ErrFailedToParseKey
tracing.SetSpanErr(span, err)
return nil, err
}
for _, path := range pathList {
path, ok := path.(string)
if !ok {
err := ErrFailedToParseKey
tracing.SetSpanErr(span, err)
return nil, err
}
paths = append(paths, path)
}
}
return paths, nil
}
// refreshKeys wipes out all keys from the Vault and inserts new randomly
// generated valid keys in amount specified in config.
func (db Vault) refreshKeys(ctx context.Context) (err error) {
ctx, span := db.tracer.Start(ctx, "vault.refreshKeys")
defer span.End()
defer func() {
if err != nil {
err = fmt.Errorf("failed to refresh keys: %w", err)
}
}()
if err := db.purge(ctx); err != nil {
tracing.SetSpanErr(span, err)
return err
}
for i := 0; i < db.config.KeyCount; i++ {
ECPem, err := generateECDSAPem()
if err != nil {
tracing.SetSpanErr(span, err)
return err
}
secretECDSA := secretData{
algorithm: entity.ES256,
keyType: entity.ECDSA,
encodedKey: ECPem,
}
if err := db.create(ctx, secretECDSA); err != nil {
tracing.SetSpanErr(span, err)
return err
}
// RSAPem, err := generateRSAPem()
// if err != nil {
// tracing.SetSpanErr(span, err)
// return err
// }
// secretRSA := secretData{
// algorithm: entity.RS256,
// keyType: entity.RSA,
// encodedKey: RSAPem,
// }
// if err := db.create(ctx, secretRSA); err != nil {
// tracing.SetSpanErr(span, err)
// return err
// }
}
return nil
}
// purge deletes all versions and metadata of all keys in the vault.
func (db Vault) purge(ctx context.Context) error {
ctx, span := db.tracer.Start(ctx, "vault.purge")
defer span.End()
paths, err := db.list(ctx, db.config.MountPath)
if err != nil {
err = fmt.Errorf("failed to list keys: %w", err)
tracing.SetSpanErr(span, err)
return err
}
for _, path := range paths {
if err := db.vault.DeleteMetadata(ctx, path); err != nil {
err = fmt.Errorf("failed to delete metadata: %w", err)
tracing.SetSpanErr(span, err)
return err
}
}
return nil
}
func (db Vault) create(ctx context.Context, secret secretData) error {
ctx, span := db.tracer.Start(ctx, "vault.create")
defer span.End()
keyData := map[string]interface{}{
"private": secret.encodedKey,
"algorithm": string(secret.algorithm),
"keyType": string(secret.keyType),
}
id, err := str.RandomAlphaString(50)
if err != nil {
tracing.SetSpanErr(span, err)
return err
}
if _, err := db.vault.Put(ctx, id, keyData); err != nil {
err = fmt.Errorf("failed to create key: %w", err)
tracing.SetSpanErr(span, err)
return err
}
return nil
}
// func generateRSAPem() (string, error) {
// key, err := rsa.GenerateKey(rand.Reader, 4096)
// if err != nil {
// return "", err
// }
// pemData := pem.EncodeToMemory(&pem.Block{
// Type: "RSA PRIVATE KEY",
// Bytes: x509.MarshalPKCS1PrivateKey(key),
// })
// return string(pemData), nil
// }
func generateECDSAPem() (string, error) {
key, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
if err != nil {
return "", err
}
marshaled, err := x509.MarshalECPrivateKey(key)
if err != nil {
return "", err
}
pemData := pem.EncodeToMemory(&pem.Block{
Type: "EC PRIVATE KEY",
Bytes: marshaled,
})
return string(pemData), nil
}