曾志威
0b0d76fbfb
Improve MongoDB compatibility and connection diagnostics; unify asset dialogs and sidebar navigation; support visible multi-account target links and mapped connection tests. Include regression tests and validation documentation.
50 lines
1.2 KiB
Go
50 lines
1.2 KiB
Go
package security
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import (
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"crypto/aes"
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"crypto/cipher"
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"crypto/rand"
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"encoding/base64"
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"errors"
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"io"
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)
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type Vault struct{ aead cipher.AEAD }
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func NewVault(key string) (*Vault, error) {
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b, err := base64.StdEncoding.DecodeString(key)
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if err != nil || len(b) != 32 {
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return nil, errors.New("invalid master key: expected base64 encoding of 32 random bytes")
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}
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block, err := aes.NewCipher(b)
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if err != nil {
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return nil, err
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}
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aead, err := cipher.NewGCM(block)
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if err != nil {
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return nil, err
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}
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return &Vault{aead}, nil
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}
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func (v *Vault) Seal(data []byte, purpose string) ([]byte, error) {
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nonce := make([]byte, v.aead.NonceSize())
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if _, err := io.ReadFull(rand.Reader, nonce); err != nil {
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return nil, err
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}
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return v.aead.Seal(nonce, nonce, data, []byte(purpose)), nil
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}
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func (v *Vault) Open(data []byte, purpose string) ([]byte, error) {
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n := v.aead.NonceSize()
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if len(data) < n {
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return nil, errors.New("invalid encrypted data")
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}
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return v.aead.Open(nil, data[:n], data[n:], []byte(purpose))
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}
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func Token() string {
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b := make([]byte, 32)
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if _, err := io.ReadFull(rand.Reader, b); err != nil {
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panic(err)
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}
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return base64.RawURLEncoding.EncodeToString(b)
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}
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