cipher

package

v1.0.3 Latest Latest Go to latest Published: Jun 7, 2026 License: BSD-3-Clause Imports: 5 Imported by: 0

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Valid go.mod file
Redistributable license
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Repository

github.com/kainonly/go

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Documentation ¶

Overview ¶

Package cipher provides symmetric encryption using XChaCha20-Poly1305. It is designed for encrypting sensitive data before storing in databases.

Index ¶

Variables
type Cipher
- func New(key string) (*Cipher, error)
- func (x *Cipher) Decode(ciphertext string) ([]byte, error)
- func (x *Cipher) Encode(data []byte) (string, error)

Constants ¶

This section is empty.

Variables ¶

View Source

var (
	// ErrCiphertextTooShort is returned when the ciphertext is shorter than the nonce size.
	ErrCiphertextTooShort = errors.New("cipher: ciphertext too short")
)

Functions ¶

This section is empty.

Types ¶

type Cipher ¶

type Cipher struct {
	AEAD cipher.AEAD
}

Cipher wraps XChaCha20-Poly1305 AEAD for encryption and decryption.

func New ¶

func New(key string) (*Cipher, error)

New creates a new Cipher with the given key. The key must be exactly 32 bytes for XChaCha20-Poly1305.

func (*Cipher) Decode ¶

func (x *Cipher) Decode(ciphertext string) ([]byte, error)

Decode decrypts a base64-encoded ciphertext and returns the original plaintext. Returns ErrCiphertextTooShort if the ciphertext is invalid.

func (*Cipher) Encode ¶

func (x *Cipher) Encode(data []byte) (string, error)

Encode encrypts the plaintext data and returns a base64-encoded ciphertext. A random nonce is generated for each encryption and prepended to the ciphertext.

Source Files ¶

View all Source files

cipher.go

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