crypto

package
v0.0.0-...-83e7a96 Latest Latest
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 Go to latest Published: Aug 27, 2017 License: MIT Imports: 18 Imported by: 0

Documentation

Overview

package for i2p specific crpytography

Index

Constants

View Source 
const IPAD = byte(0x36)
View Source 
const OPAD = byte(0x5C)

Variables

View Source 
var ElgDecryptFail = errors.New("failed to decrypt elgamal encrypted data")
View Source 
var ElgEncryptTooBig = errors.New("failed to encrypt data, too big for elgamal")
View Source 
var ErrBadSignatureSize = errors.New("bad signature size")
View Source 
var ErrInvalidKeyFormat = errors.New("invalid key format")
View Source 
var ErrInvalidSignature = errors.New("invalid signature")
View Source 
var SHA256 = sha256.Sum256

Functions

func ElgamalGenerate 

func ElgamalGenerate(priv *elgamal.PrivateKey, rand io.Reader) (err error)

generate an elgamal key pair

Types

type DSAPrivateKey 

type DSAPrivateKey [20]byte

func (DSAPrivateKey) Generate 

func (k DSAPrivateKey) Generate() (s DSAPrivateKey, err error)

func (DSAPrivateKey) Len 

func (k DSAPrivateKey) Len() int

func (DSAPrivateKey) NewSigner 

func (k DSAPrivateKey) NewSigner() (s Signer, err error)

create a new dsa signer

func (DSAPrivateKey) Public 

func (k DSAPrivateKey) Public() (pk DSAPublicKey, err error)

type DSAPublicKey 

type DSAPublicKey [128]byte

func (DSAPublicKey) Len 

func (k DSAPublicKey) Len() int

func (DSAPublicKey) NewVerifier 

func (k DSAPublicKey) NewVerifier() (v Verifier, err error)

create a new dsa verifier

type DSASigner 

type DSASigner struct {
	// contains filtered or unexported fields
}

func (*DSASigner) Sign 

func (ds *DSASigner) Sign(data []byte) (sig []byte, err error)

func (*DSASigner) SignHash 

func (ds *DSASigner) SignHash(h []byte) (sig []byte, err error)

type DSAVerifier 

type DSAVerifier struct {
	// contains filtered or unexported fields
}

func (*DSAVerifier) Verify 

func (v *DSAVerifier) Verify(data, sig []byte) (err error)

verify data with a dsa public key

func (*DSAVerifier) VerifyHash 

func (v *DSAVerifier) VerifyHash(h, sig []byte) (err error)

verify hash of data with a dsa public key

type Decrypter 

type Decrypter interface {
	// decrypt a block of data
	// return decrypted block or nil and error if error happens
	Decrypt(data []byte) ([]byte, error)
}

decrypts data

type ECDSAVerifier 

type ECDSAVerifier struct {
	// contains filtered or unexported fields
}

func (*ECDSAVerifier) Verify 

func (v *ECDSAVerifier) Verify(data, sig []byte) (err error)

verify a block of data by hashing it and comparing the hash against the signature

func (*ECDSAVerifier) VerifyHash 

func (v *ECDSAVerifier) VerifyHash(h, sig []byte) (err error)

verify a signature given the hash

type ECP256PrivateKey 

type ECP256PrivateKey [32]byte

type ECP256PublicKey 

type ECP256PublicKey [64]byte

func (ECP256PublicKey) Len 

func (k ECP256PublicKey) Len() int

func (ECP256PublicKey) NewVerifier 

func (k ECP256PublicKey) NewVerifier() (Verifier, error)

type ECP384PrivateKey 

type ECP384PrivateKey [48]byte

type ECP384PublicKey 

type ECP384PublicKey [96]byte

func (ECP384PublicKey) Len 

func (k ECP384PublicKey) Len() int

func (ECP384PublicKey) NewVerifier 

func (k ECP384PublicKey) NewVerifier() (Verifier, error)

type ECP521PrivateKey 

type ECP521PrivateKey [66]byte

type ECP521PublicKey 

type ECP521PublicKey [132]byte

func (ECP521PublicKey) Len 

func (k ECP521PublicKey) Len() int

func (ECP521PublicKey) NewVerifier 

func (k ECP521PublicKey) NewVerifier() (Verifier, error)

type Ed25519PrivateKey 

type Ed25519PrivateKey [32]byte

type Ed25519PublicKey 

type Ed25519PublicKey [32]byte

func (Ed25519PublicKey) NewVerifier 

func (k Ed25519PublicKey) NewVerifier() (v Verifier, err error)

type Ed25519Signer 

type Ed25519Signer struct {
	// contains filtered or unexported fields
}

func (*Ed25519Signer) Sign 

func (s *Ed25519Signer) Sign(data []byte) (sig []byte, err error)

func (*Ed25519Signer) SignHash 

func (s *Ed25519Signer) SignHash(h []byte) (sig []byte, err error)

type Ed25519Verifier 

type Ed25519Verifier struct {
	// contains filtered or unexported fields
}

func (*Ed25519Verifier) Verify 

func (v *Ed25519Verifier) Verify(data, sig []byte) (err error)

func (*Ed25519Verifier) VerifyHash 

func (v *Ed25519Verifier) VerifyHash(h, sig []byte) (err error)

type ElgPrivateKey 

type ElgPrivateKey [256]byte

func (ElgPrivateKey) Len 

func (elg ElgPrivateKey) Len() int

func (ElgPrivateKey) NewDecrypter 

func (elg ElgPrivateKey) NewDecrypter() (dec Decrypter, err error)

type ElgPublicKey 

type ElgPublicKey [256]byte

func (ElgPublicKey) Len 

func (elg ElgPublicKey) Len() int

func (ElgPublicKey) NewEncrypter 

func (elg ElgPublicKey) NewEncrypter() (enc Encrypter, err error)

type ElgamalEncryption 

type ElgamalEncryption struct {
	// contains filtered or unexported fields
}

func (*ElgamalEncryption) Encrypt 

func (elg *ElgamalEncryption) Encrypt(data []byte) (enc []byte, err error)

func (*ElgamalEncryption) EncryptPadding 

func (elg *ElgamalEncryption) EncryptPadding(data []byte, zeroPadding bool) (encrypted []byte, err error)

type Encrypter 

type Encrypter interface {
	// encrypt a block of data
	// return encrypted block or nil and error if an error happened
	Encrypt(data []byte) (enc []byte, err error)
}

encrypts data

type HMACDigest 

type HMACDigest [16]byte

func I2PHMAC 

func I2PHMAC(data []byte, k HMACKey) (d HMACDigest)

do i2p hmac

type HMACKey 

type HMACKey [32]byte

type PrivateEncryptionKey 

type PrivateEncryptionKey interface {

	// create a new decryption object for this private key to decrypt data encrypted to our public key
	// returns decrypter or nil and error if the private key is in a bad format
	NewDecrypter() (Decrypter, error)
}

type PublicEncryptionKey 

type PublicEncryptionKey interface {

	// create a new encrypter to encrypt data to this public key
	NewEncrypter() (Encrypter, error)

	// length of this public key in bytes
	Len() int
}

type PublicKey 

type PublicKey interface {
	Len() int
	NewEncrypter() (Encrypter, error)
}

type RSA2048PrivateKey 

type RSA2048PrivateKey [512]byte

type RSA2048PublicKey 

type RSA2048PublicKey [256]byte

type RSA3072PrivateKey 

type RSA3072PrivateKey [786]byte

type RSA3072PublicKey 

type RSA3072PublicKey [384]byte

type RSA4096PrivateKey 

type RSA4096PrivateKey [1024]byte

type RSA4096PublicKey 

type RSA4096PublicKey [512]byte

type Signer 

type Signer interface {
	// sign data with our private key by calling SignHash after hashing the data we are given
	// return signature or nil signature and error if an error happened
	Sign(data []byte) (sig []byte, err error)

	// sign hash of data with our private key
	// return signature or nil signature and error if an error happened
	SignHash(h []byte) (sig []byte, err error)
}

type for signing data

type SigningPrivateKey 

type SigningPrivateKey interface {
	// create a new signer to sign data
	// return signer or nil and error if key format is invalid
	NewSigner() (Signer, error)
	// length of this private key
	Len() int
	// get public key or return nil and error if invalid key data in private key
	Public() (SigningPublicKey, error)
	// generate a new private key, put it into itself
	// returns itself or nil and error if an error occurs
	Generate() (SigningPrivateKey, error)
}

key for signing data

type SigningPublicKey 

type SigningPublicKey interface {
	// create new Verifier to verify the validity of signatures
	// return verifier or nil and error if key format is invalid
	NewVerifier() (Verifier, error)
	// get the size of this public key
	Len() int
}

key for verifying data

type Tunnel 

type Tunnel struct {
	// contains filtered or unexported fields
}

func NewTunnelCrypto 

func NewTunnelCrypto(layerKey, ivKey TunnelKey) (t *Tunnel, err error)

func (*Tunnel) Decrypt 

func (t *Tunnel) Decrypt(td *TunnelData)

func (*Tunnel) Encrypt 

func (t *Tunnel) Encrypt(td *TunnelData)

encrypt tunnel data in place

type TunnelData 

type TunnelData [1028]byte

type TunnelIV 

type TunnelIV []byte

The initialization vector for a tunnel message

type TunnelKey 

type TunnelKey [32]byte

A symetric key for encrypting tunnel messages

type Verifier 

type Verifier interface {
	// verify hashed data with this signing key
	// return nil on valid signature otherwise error
	VerifyHash(h, sig []byte) error
	// verify an unhashed piece of data by hashing it and calling VerifyHash
	Verify(data, sig []byte) error
}

type for verifying signatures

Source Files

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