crypto

Documentation

Overview

This package implements helper methods to be used by the AirDispatch system to take care of all encryption needs. It is split into files based on the types of crypto included.

--- Crypto | - Constants = Constants used for Encoding and Decoding | - Crypto = Methods needed for all Crypto Files | - Encoding = Encoding Keys to Binary (and back again) | - Encryption = AES Encryption and Decryption | - Hash = SHA256 Hashing | - Signatures = ECDSA Signing

Index

• Variables
• func BytesToAddress(toHash []byte) []byte
• func BytesToKey(data []byte) (*ecdsa.PublicKey, error)
• func BytesToRSA(data []byte) (*rsa.PublicKey, error)
• func HashRIP(payload []byte) []byte
• func HashSHA(payload []byte) []byte
• func HybridDecryption(rsaKey *rsa.PrivateKey, encryptedAesKey []byte, ciphertext []byte) (plaintext []byte, error error)
• func KeyToBytes(key *ecdsa.PublicKey) []byte
• func RSAToBytes(key *rsa.PublicKey) []byte
• func SignPayload(key *ecdsa.PrivateKey, payload []byte) (r, s *big.Int, err error)
• func VerifyPayload(key *ecdsa.PublicKey, payload []byte, r, s *big.Int) bool
• func VerifyStringAddress(address string) bool
• type AESKey
  • func EncryptDataWithRandomAESKey(plaintext []byte) (aesCipher []byte, unencryptedKey AESKey, err error)
• type EncryptedAESKey
  • func EncryptAESKey(a AESKey, b *rsa.PublicKey) (EncryptedAESKey, error)

Variables

var AESKeySize int = 256

var ECDSAPrefix = []byte{3}

var EllipticCurve elliptic.Curve = elliptic.P256()

var EncryptionNone = []byte{0, 0} // "airdispat.ch/crypto/none"

Seperate Encryption Types

var EncryptionRSA = []byte{1, 1} // "airdispat.ch/crypto/rsa2048-aes256"

var RSAPrefix = []byte("AD-RSA")

var Random = rand.Reader

var SigningECDSA = []byte{0}

Seperate Signing Types

Functions

func BytesToAddress

func BytesToAddress(toHash []byte) []byte

func BytesToKey

func BytesToKey(data []byte) (*ecdsa.PublicKey, error)

This function creates an ECDSA Public KEy from a bytestring. This is used to send the public key in the SignedMessage message.

func BytesToRSA

func BytesToRSA(data []byte) (*rsa.PublicKey, error)

func HashRIP

func HashRIP(payload []byte) []byte

Encapsulation for the RIPEMD160 Hasher

func HashSHA

func HashSHA(payload []byte) []byte

Encapsulation for the SHA Hasher

func HybridDecryption

func HybridDecryption(rsaKey *rsa.PrivateKey, encryptedAesKey []byte, ciphertext []byte) (plaintext []byte, error error)

func KeyToBytes

func KeyToBytes(key *ecdsa.PublicKey) []byte

This function writes an ECDSA Public Key to a bytestring. This is used to send the public key in the SignedMessage message.

func RSAToBytes

func RSAToBytes(key *rsa.PublicKey) []byte

func SignPayload

func SignPayload(key *ecdsa.PrivateKey, payload []byte) (r, s *big.Int, err error)

Encapsulates ECDSA Signature Generation

func VerifyPayload

func VerifyPayload(key *ecdsa.PublicKey, payload []byte, r, s *big.Int) bool

Encapsulates ECDSA Signature Verification

func VerifyStringAddress

func VerifyStringAddress(address string) bool

Hex decode an Address then verify that it is correct, then pass it to the byte verification function

Types

type AESKey

type AESKey []byte

func EncryptDataWithRandomAESKey

func EncryptDataWithRandomAESKey(plaintext []byte) (aesCipher []byte, unencryptedKey AESKey, err error)

type EncryptedAESKey

type EncryptedAESKey []byte

func EncryptAESKey

func EncryptAESKey(a AESKey, b *rsa.PublicKey) (EncryptedAESKey, error)