ursa 0.3.7

This is the shared crypto library for Hyperledger components.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126

use kex::{secp256k1::EcdhSecp256k1Sha256 as EcdhSecp256k1Sha256Impl, KeyExchangeScheme};
use keys::{KeyGenOption, PrivateKey, PublicKey};
use signatures::{
    secp256k1::EcdsaSecp256k1Sha256 as EcdsaSecp256k1Sha256Impl, EcdsaPublicKeyHandler,
    SignatureScheme,
};

use wasm_bindgen::prelude::*;

use super::{KeyPair, WasmPrivateKey, WasmPublicKey, WasmSessionKey};

#[wasm_bindgen]
pub struct EcdsaSecp256k1Sha256(EcdsaSecp256k1Sha256Impl);

#[wasm_bindgen]
#[allow(non_snake_case)]
impl EcdsaSecp256k1Sha256 {
    pub fn new() -> EcdsaSecp256k1Sha256 {
        EcdsaSecp256k1Sha256(EcdsaSecp256k1Sha256Impl::new())
    }

    pub fn keypair(&self) -> Result<KeyPair, JsValue> {
        let (pk, sk) = maperr!(self.0.keypair(None));
        let pk = WasmPublicKey::from(&pk);
        let sk = WasmPrivateKey::from(&sk);
        Ok(KeyPair { pk, sk })
    }

    pub fn keyPairFromSeed(&self, seed: &[u8]) -> Result<KeyPair, JsValue> {
        let (pk, sk) = maperr!(self.0.keypair(Some(KeyGenOption::UseSeed(seed.to_vec()))));
        let pk = WasmPublicKey::from(&pk);
        let sk = WasmPrivateKey::from(&sk);
        Ok(KeyPair { pk, sk })
    }

    pub fn getPublicKey(&self, sk: &WasmPrivateKey) -> Result<WasmPublicKey, JsValue> {
        let sk = PrivateKey::from(sk);
        let (pk, _) = maperr!(self
            .0
            .keypair(Some(KeyGenOption::FromSecretKey(sk.clone()))));
        let pk = WasmPublicKey::from(&pk);
        Ok(pk)
    }

    pub fn sign(&self, message: &[u8], sk: &WasmPrivateKey) -> Result<Vec<u8>, JsValue> {
        let sk = PrivateKey::from(sk);
        let sig = maperr!(self.0.sign(message, &sk));
        Ok(sig)
    }

    pub fn verify(
        &self,
        message: &[u8],
        signature: &[u8],
        pk: &WasmPublicKey,
    ) -> Result<bool, JsValue> {
        let pk = PublicKey::from(pk);
        Ok(maperr!(self.0.verify(message, signature, &pk)))
    }

    pub fn normalizeS(&self, signature: &mut [u8]) -> Result<(), JsValue> {
        maperr!(self.0.normalize_s(signature));
        Ok(())
    }

    pub fn publicKeyCompressed(&self, pk: &WasmPublicKey) -> WasmPublicKey {
        let pk = PublicKey::from(pk);
        WasmPublicKey::from(self.0.public_key_compressed(&pk))
    }

    pub fn publicKeyUncompressed(&self, pk: &WasmPublicKey) -> WasmPublicKey {
        let pk = PublicKey::from(pk);
        WasmPublicKey::from(self.0.public_key_uncompressed(&pk))
    }

    pub fn parseToPublicKey(&self, bytes: &[u8]) -> Result<WasmPublicKey, JsValue> {
        let pk = maperr!(self.0.parse(bytes));
        Ok(WasmPublicKey::from(&pk))
    }
}

#[wasm_bindgen]
pub struct EcdhSecp256k1Sha256(EcdhSecp256k1Sha256Impl);

#[wasm_bindgen]
#[allow(non_snake_case)]
impl EcdhSecp256k1Sha256 {
    pub fn new() -> EcdhSecp256k1Sha256 {
        EcdhSecp256k1Sha256(EcdhSecp256k1Sha256Impl::new())
    }

    pub fn keypair(&self) -> Result<KeyPair, JsValue> {
        let (pk, sk) = maperr!(self.0.keypair(None));
        let pk = WasmPublicKey::from(&pk);
        let sk = WasmPrivateKey::from(&sk);
        Ok(KeyPair { pk, sk })
    }

    pub fn keyPairFromSeed(&self, seed: &[u8]) -> Result<KeyPair, JsValue> {
        let (pk, sk) = maperr!(self.0.keypair(Some(KeyGenOption::UseSeed(seed.to_vec()))));
        let pk = WasmPublicKey::from(&pk);
        let sk = WasmPrivateKey::from(&sk);
        Ok(KeyPair { pk, sk })
    }

    pub fn getPublicKey(&self, sk: &WasmPrivateKey) -> Result<WasmPublicKey, JsValue> {
        let sk = PrivateKey::from(sk);
        let (pk, _) = maperr!(self
            .0
            .keypair(Some(KeyGenOption::FromSecretKey(sk.clone()))));
        let pk = WasmPublicKey::from(&pk);
        Ok(pk)
    }

    pub fn computeSharedSecret(
        &self,
        sk: &WasmPrivateKey,
        pk: &WasmPublicKey,
    ) -> Result<WasmSessionKey, JsValue> {
        let sk = PrivateKey::from(sk);
        let pk = PublicKey::from(pk);
        let secret = maperr!(self.0.compute_shared_secret(&sk, &pk));
        let secret = WasmSessionKey::from(secret);
        Ok(secret)
    }
}