crypto

package
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Published: Jul 18, 2023 License: Apache-2.0 Imports: 6 Imported by: 0

README

crypto

crypto is the cryptographic package adapted for CometBFT's uses

Importing it

To get the interfaces, import "github.com/cometbft/cometbft/crypto"

For any specific algorithm, use its specific module e.g. import "github.com/cometbft/cometbft/crypto/ed25519"

Binary encoding

For Binary encoding, please refer to the CometBFT encoding specification.

JSON Encoding

JSON encoding is done using CometBFT's internal json encoder. For more information on JSON encoding, please refer to CometBFT JSON encoding

Example JSON encodings:

ed25519.PrivKey     - {"type":"tendermint/PrivKeyEd25519","value":"EVkqJO/jIXp3rkASXfh9YnyToYXRXhBr6g9cQVxPFnQBP/5povV4HTjvsy530kybxKHwEi85iU8YL0qQhSYVoQ=="}
ed25519.PubKey      - {"type":"tendermint/PubKeyEd25519","value":"AT/+aaL1eB0477Mud9JMm8Sh8BIvOYlPGC9KkIUmFaE="}
sr25519.PrivKeySr25519   - {"type":"tendermint/PrivKeySr25519","value":"xtYVH8UCIqfrY8FIFc0QEpAEBShSG4NT0zlEOVSZ2w4="}
sr25519.PubKeySr25519    - {"type":"tendermint/PubKeySr25519","value":"8sKBLKQ/OoXMcAJVxBqz1U7TyxRFQ5cmliuHy4MrF0s="}
crypto.PrivKeySecp256k1   - {"type":"tendermint/PrivKeySecp256k1","value":"zx4Pnh67N+g2V+5vZbQzEyRerX9c4ccNZOVzM9RvJ0Y="}
crypto.PubKeySecp256k1    - {"type":"tendermint/PubKeySecp256k1","value":"A8lPKJXcNl5VHt1FK8a244K9EJuS4WX1hFBnwisi0IJx"}

Documentation

Index

Examples

Constants

View Source
const (
	// AddressSize is the size of a pubkey address.
	AddressSize = tmhash.TruncatedSize
)
View Source
const Version = "0.9.0-dev"

Variables

This section is empty.

Functions

func CRandBytes

func CRandBytes(numBytes int) []byte

This only uses the OS's randomness

func CRandHex

func CRandHex(numDigits int) string

CRandHex returns a hex encoded string that's floor(numDigits/2) * 2 long.

Note: CRandHex(24) gives 96 bits of randomness that are usually strong enough for most purposes.

func CReader

func CReader() io.Reader

Returns a crand.Reader.

func Sha256

func Sha256(bytes []byte) []byte
Example
package main

import (
	"fmt"

	"github.com/ben2077/cometbft/crypto"
)

func main() {
	sum := crypto.Sha256([]byte("This is CometBFT"))
	fmt.Printf("%x\n", sum)
}
Output:

ea186526b041852d923b02c91aa04b00c0df258b3d69cb688eaba577f5562758

Types

type Address

type Address = bytes.HexBytes

An address is a []byte, but hex-encoded even in JSON. []byte leaves us the option to change the address length. Use an alias so Unmarshal methods (with ptr receivers) are available too.

func AddressHash

func AddressHash(bz []byte) Address

type BatchVerifier

type BatchVerifier interface {
	// Add appends an entry into the BatchVerifier.
	Add(key PubKey, message, signature []byte) error
	// Verify verifies all the entries in the BatchVerifier, and returns
	// if every signature in the batch is valid, and a vector of bools
	// indicating the verification status of each signature (in the order
	// that signatures were added to the batch).
	Verify() (bool, []bool)
}

If a new key type implements batch verification, the key type must be registered in github.com/ben2077/cometbft/crypto/batch

type PrivKey

type PrivKey interface {
	Bytes() []byte
	Sign(msg []byte) ([]byte, error)
	PubKey() PubKey
	Equals(PrivKey) bool
	Type() string
}

type PubKey

type PubKey interface {
	Address() Address
	Bytes() []byte
	VerifySignature(msg []byte, sig []byte) bool
	Equals(PubKey) bool
	Type() string
}

type Symmetric

type Symmetric interface {
	Keygen() []byte
	Encrypt(plaintext []byte, secret []byte) (ciphertext []byte)
	Decrypt(ciphertext []byte, secret []byte) (plaintext []byte, err error)
}

Directories

Path Synopsis
internal
Package merkle computes a deterministic minimal height Merkle tree hash.
Package merkle computes a deterministic minimal height Merkle tree hash.
Package xchacha20poly1305 creates an AEAD using hchacha, chacha, and poly1305 This allows for randomized nonces to be used in conjunction with chacha.
Package xchacha20poly1305 creates an AEAD using hchacha, chacha, and poly1305 This allows for randomized nonces to be used in conjunction with chacha.

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