"encoding/binary"
"golang.org/x/crypto/chacha20"
"golang.org/x/crypto/internal/alias"
"golang.org/x/crypto/internal/poly1305"
"crypto/cipher"
"errors"
"golang.org/x/crypto/chacha20"
"crypto/cipher"
"errors"
"encoding/binary"
"golang.org/x/crypto/internal/alias"
"golang.org/x/sys/cpu"
KeySize is the size of the key used by this AEAD, in bytes.
const KeySize = 32NonceSize is the size of the nonce used with the standard variant of this AEAD, in bytes. Note that this is too short to be safely generated at random if the same key is reused more than 2³² times.
const NonceSize = 12NonceSizeX is the size of the nonce used with the XChaCha20-Poly1305 variant of this AEAD, in bytes.
const NonceSizeX = 24Overhead is the size of the Poly1305 authentication tag, and the difference between a ciphertext length and its plaintext.
const Overhead = 16var errOpen = *ast.CallExprvar useAVX2 = *ast.BinaryExprtype chacha20poly1305 struct {
key [KeySize]byte
}type xchacha20poly1305 struct {
key [KeySize]byte
}New returns a ChaCha20-Poly1305 AEAD that uses the given 256-bit key.
func New(key []byte) (cipher.AEAD, error)NewX returns a XChaCha20-Poly1305 AEAD that uses the given 256-bit key. XChaCha20-Poly1305 is a ChaCha20-Poly1305 variant that takes a longer nonce, suitable to be generated randomly without risk of collisions. It should be preferred when nonce uniqueness cannot be trivially ensured, or whenever nonces are randomly generated.
func NewX(key []byte) (cipher.AEAD, error)func (c *chacha20poly1305) NonceSize() intfunc (*xchacha20poly1305) NonceSize() intfunc (c *chacha20poly1305) Open(dst []byte, nonce []byte, ciphertext []byte, additionalData []byte) ([]byte, error)func (x *xchacha20poly1305) Open(dst []byte, nonce []byte, ciphertext []byte, additionalData []byte) ([]byte, error)func (*xchacha20poly1305) Overhead() intfunc (c *chacha20poly1305) Overhead() intfunc (x *xchacha20poly1305) Seal(dst []byte, nonce []byte, plaintext []byte, additionalData []byte) []bytefunc (c *chacha20poly1305) Seal(dst []byte, nonce []byte, plaintext []byte, additionalData []byte) []bytego:noescape
func chacha20Poly1305Open(dst []byte, key []uint32, src []byte, ad []byte) boolgo:noescape
func chacha20Poly1305Seal(dst []byte, key []uint32, src []byte, ad []byte)func (c *chacha20poly1305) open(dst []byte, nonce []byte, ciphertext []byte, additionalData []byte) ([]byte, error)func (c *chacha20poly1305) open(dst []byte, nonce []byte, ciphertext []byte, additionalData []byte) ([]byte, error)func (c *chacha20poly1305) openGeneric(dst []byte, nonce []byte, ciphertext []byte, additionalData []byte) ([]byte, error)func (c *chacha20poly1305) seal(dst []byte, nonce []byte, plaintext []byte, additionalData []byte) []bytefunc (c *chacha20poly1305) seal(dst []byte, nonce []byte, plaintext []byte, additionalData []byte) []bytefunc (c *chacha20poly1305) sealGeneric(dst []byte, nonce []byte, plaintext []byte, additionalData []byte) []bytesetupState writes a ChaCha20 input matrix to state. See https://tools.ietf.org/html/rfc7539#section-2.3.
func setupState(state *[16]uint32, key *[32]byte, nonce []byte)sliceForAppend takes a slice and a requested number of bytes. It returns a slice with the contents of the given slice followed by that many bytes and a second slice that aliases into it and contains only the extra bytes. If the original slice has sufficient capacity then no allocation is performed.
func sliceForAppend(in []byte, n int) (head []byte, tail []byte)func writeUint64(p *poly1305.MAC, n int)func writeWithPadding(p *poly1305.MAC, b []byte)Generated with Arrow