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https://github.com/wavesplatform/go-lib-crypto
GoLang implementation of the unified crypto primitives for Waves Platform
https://github.com/wavesplatform/go-lib-crypto
Last synced: 3 months ago
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GoLang implementation of the unified crypto primitives for Waves Platform
- Host: GitHub
- URL: https://github.com/wavesplatform/go-lib-crypto
- Owner: wavesplatform
- License: mit
- Created: 2019-05-30T09:06:11.000Z (over 5 years ago)
- Default Branch: master
- Last Pushed: 2020-08-31T10:36:11.000Z (about 4 years ago)
- Last Synced: 2024-04-15T00:16:49.377Z (7 months ago)
- Language: Go
- Size: 1.09 MB
- Stars: 5
- Watchers: 9
- Forks: 3
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
- awesome-waves - go-lib-crypto - GoLang implementation of the unified crypto primitives for Waves. (Frameworks and tools / Client libraries)
README
# go-lib-crypto
[](https://goreportcard.com/report/github.com/wavesplatform/go-lib-crypto)
[](https://godoc.org/github.com/wavesplatform/go-lib-crypto)
`go-lib-crypto` is a unified crypto library for [Waves Platform](https://wavesplatform.com). It has a unified set of functions corresponding with [`unified-declarations`](https://github.com/wavesplatform/unified-declarations).
This library meant to be used in client applications. That's why its API is relatively simple.
The following could be done using the library:
* Calculation of a hash digest of various hash functions used by Waves
* Encoding and decoding of byte slices in BASE58 and BASE64 string representation
* Key pair generation from seed phrase
* Waves address generation and verification
* Random seed phrase generation and verification
* Signing of bytes message
* Verification of signed message
## Installation and import
```bash
go get -u github.com/wavesplatform/go-lib-crypto
```
```go
import "github.com/wavesplatform/go-lib-crypto"
```
## Short API reference with examples
### Instantiation
For the purpose of unification the API of the library made in form of the interface.
To instantiate the un-exported structure that implements the interface call the `NewWavesCrypto` function.
```go
crypto := wavesplatform.NewWavesCrypto()
```
### Working with hashes
The three hash functions used by Waves are supported:
* SHA-256
* BLAKE2b-256
* Keccak-256 (legacy version)
Every hash functions accepts one parameter of type `Bytes`. The `Bytes` type wraps a slice of bytes.
```go
package main
import (
"encoding/hex"
"fmt"
"github.com/wavesplatform/go-lib-crypto"
)
func main() {
bytes, _ := hex.DecodeString("fd08be957bda07dc529ad8100df732f9ce12ae3e42bcda6acabe12c02dfd6989")
c := wavesplatform.NewWavesCrypto()
blake := c.Blake2b(bytes)
keccak := c.Keccak(bytes)
sha := c.Sha256(bytes)
fmt.Println("BLAKE2b-256:", hex.EncodeToString(blake))
fmt.Println("Keccak-256:", hex.EncodeToString(keccak))
fmt.Println("SHA-256:", hex.EncodeToString(sha))
}
```
The output should be like this:
```
BLAKE2b-256: c425f69e3be14c929d18b2808831cbaeb2733c9e6b9c5ed37c3601086f202396
Keccak-256: 14a0d0ee74865d8d721c4218768b7c39fd365b53f0359d6d28d82dc97450f583
SHA-256: 7ed1b5b6867c0d6c98097676adc00b6049882e473441ac5ff3613df48b69f9f3
```
See the [example on play.golang.org](https://play.golang.org/p/d5Eo4yY6lIC).
### Seed and keys generation
One can create a new key pair from the seed phrase. Library defines types for `Seed`, `PrivateKey`, `PublicKey` (wrappers over `string`) and structure for `KeyPair` that combines the private and public keys.
The function `RandomSeed` creates a new random seed phrase of 15 words. The seed generation follows the [BIP39 standard](https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki).
The keys generation functions `KeyPair`, `PublicKey` and `PrivateKey` accept the seed phrase as its parameters and produces a `KeyPair`, `PublicKey` or `PrivateKey` relatively. In latter two cases the whole key pair is produced, but only a part of it returned to the user.
Here is the [example](https://play.golang.org/p/MCGUtsvPXbZ).
```go
package main
import (
"fmt"
"github.com/wavesplatform/go-lib-crypto"
)
func main() {
c := wavesplatform.NewWavesCrypto()
seed := c.RandomSeed()
fmt.Println("SEED:", seed)
pair := c.KeyPair(seed)
fmt.Println("PAIR:", "PRIVATE KEY:", pair.PrivateKey, "PUBLIC KEY:", pair.PublicKey)
sk := c.PrivateKey(seed)
fmt.Println("PRIVATE KEY:", sk)
pk := c.PublicKey(seed)
fmt.Println("PUBLIC KEY:", pk)
}
```
### Waves address generation
There is an `Address` type which wraps the string. An address could be created from `PublicKey` or `Seed` using functions `Address` or `AddressFromSeed`. In both cases the `WavesChainID` byte should be provided as second parameter.
It is possible to verify the correctness of an Address string using functions `VerifyAddressChecksum` or `VerifyAddress`. The first function checks that the address has correct length and version and the built-in checksum is correct. The second one additionally checks that the address contains the correct `WavesChainID`.
```go
package main
import (
"fmt"
"github.com/wavesplatform/go-lib-crypto"
)
func main() {
c := wavesplatform.NewWavesCrypto()
seed := c.RandomSeed()
fmt.Println("SEED:", seed)
pair := c.KeyPair(seed)
fmt.Println("PAIR:", "PRIVATE KEY:", pair.PrivateKey, "PUBLIC KEY:", pair.PublicKey)
address := c.Address(pair.PublicKey, wavesplatform.TestNet)
fmt.Println("ADDRESS 1:", address)
address2 := c.AddressFromSeed(seed, wavesplatform.TestNet)
fmt.Println("ADDRESS 2:", address2)
fmt.Println("CHECKSUM OK:", c.VerifyAddressChecksum(address))
fmt.Println("ADDRESS ON TESTNET OK:", c.VerifyAddress(address, wavesplatform.TestNet))
fmt.Println("ADDRESS ON MAINNET OK:", c.VerifyAddress(address, wavesplatform.MainNet))
}
```
Try the [example](https://play.golang.org/p/YXHpdWAItC7).
### Signing and verifying
The library offers two functions to sign bytes (`SignBytes` and `SignBytesBySeed`) and one to verify a signature (`VerifySignature`).
Here is the [example](https://play.golang.org/p/7r8Ivd5XgNE) of using those functions.
```go
package main
import (
"fmt"
"encoding/hex"
"github.com/wavesplatform/go-lib-crypto"
)
func main() {
bytes, _ := hex.DecodeString("fd08be957bda07dc529ad8100df732f9ce12ae3e42bcda6acabe12c02dfd6989")
other, _ := hex.DecodeString("54686520696e636f7272656374206d657373616765")
c := wavesplatform.NewWavesCrypto()
seed := c.RandomSeed()
fmt.Println("SEED:", seed)
pair := c.KeyPair(seed)
fmt.Println("PAIR:", "PRIVATE KEY:", pair.PrivateKey, "PUBLIC KEY:", pair.PublicKey)
sig1 := c.SignBytes(bytes, pair.PrivateKey)
fmt.Println("SIGNATURE 1:", hex.EncodeToString(sig1))
sig2 := c.SignBytesBySeed(bytes, seed)
fmt.Println("SIGNATURE 2:", hex.EncodeToString(sig2))
fmt.Println("SIGNATURE 1 OK:", c.VerifySignature(pair.PublicKey, bytes, sig1))
fmt.Println("SIGNATURE 2 OK:", c.VerifySignature(pair.PublicKey, bytes, sig2))
fmt.Println("SIGNATURE 1 ON OTHER OK:", c.VerifySignature(pair.PublicKey, other, sig1))
fmt.Println("SIGNATURE 2 ON OTHER OK:", c.VerifySignature(pair.PublicKey, other, sig2))
}
```
## Documentation
[`go-lib-crypto` on GoDoc](http://godoc.org/github.com/wavesplatform/go-lib-crypto).