Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 | 28x 28x 28x 28x 28x 20x 20x | import { KeyDeriver, KeyDeriverApi } from './KeyDeriver'
import { Hash, ECDSA, BigNumber, Signature, Schnorr, PublicKey, Point, PrivateKey } from '@bsv/sdk'
import { WERR_INVALID_PARAMETER } from './WERR_errors'
import {
CreateHmacArgs,
CreateHmacResult,
CreateSignatureArgs,
CreateSignatureResult,
GetPublicKeyArgs,
OriginatorDomainNameStringUnder250Bytes,
PubKeyHex,
RevealCounterpartyKeyLinkageArgs,
RevealCounterpartyKeyLinkageResult,
RevealSpecificKeyLinkageArgs,
RevealSpecificKeyLinkageResult,
VerifyHmacArgs,
VerifyHmacResult,
VerifySignatureArgs,
VerifySignatureResult,
WalletCryptoObject,
WalletDecryptArgs,
WalletDecryptResult,
WalletEncryptArgs,
WalletEncryptResult
} from './Wallet.interfaces'
const privilegedError = new WERR_INVALID_PARAMETER('args.privileged', 'false or undefined. Wallet is a single-keyring wallet, operating without context about whether its configured keyring is privileged.')
/**
* WalletCrypto implements single-keyring wallet cryptography functions,
* operating without context about whether its configured keyring is privileged.
*/
export class WalletCrypto implements WalletCryptoObject {
keyDeriver: KeyDeriverApi
constructor(keyDeriver: KeyDeriverApi | PrivateKey) {
Iif (keyDeriver instanceof PrivateKey)
keyDeriver = new KeyDeriver(keyDeriver)
this.keyDeriver = keyDeriver
}
/**
* Convenience method to obtain the identityKey.
* @param originator
* @returns `await this.getPublicKey({ identityKey: true }, originator)`
*/
async getIdentityKey(
originator?: OriginatorDomainNameStringUnder250Bytes
): Promise<{ publicKey: PubKeyHex }> {
return await this.getPublicKey({ identityKey: true }, originator)
}
async getPublicKey(
args: GetPublicKeyArgs,
originator?: OriginatorDomainNameStringUnder250Bytes
): Promise<{ publicKey: PubKeyHex }> {
Iif (args.privileged) {
throw privilegedError
}
if (args.identityKey) {
return { publicKey: this.keyDeriver.rootKey.toPublicKey().toString() }
} else {
Iif (!args.protocolID || !args.keyID) {
throw new Error('protocolID and keyID are required if identityKey is false or undefined.')
}
return {
publicKey: this.keyDeriver
.derivePublicKey(
args.protocolID,
args.keyID,
args.counterparty || 'self',
args.forSelf
)
.toString()
}
}
}
async revealCounterpartyKeyLinkage(
args: RevealCounterpartyKeyLinkageArgs,
originator?: OriginatorDomainNameStringUnder250Bytes
): Promise<RevealCounterpartyKeyLinkageResult> {
Iif (args.privileged) {
throw privilegedError
}
const { publicKey: identityKey } = await this.getPublicKey({ identityKey: true })
const linkage = this.keyDeriver.revealCounterpartySecret(args.counterparty)
const linkageProof = new Schnorr().generateProof(this.keyDeriver.rootKey, this.keyDeriver.rootKey.toPublicKey(), PublicKey.fromString(args.counterparty), Point.fromDER(linkage))
const linkageProofBin = [
...linkageProof.R.encode(true),
...linkageProof.SPrime.encode(true),
...linkageProof.z.toArray()
] as number[]
const revelationTime = new Date().toISOString()
const { ciphertext: encryptedLinkage } = await this.encrypt({
plaintext: linkage,
protocolID: [2, 'counterparty linkage revelation'],
keyID: revelationTime,
counterparty: args.verifier
})
const { ciphertext: encryptedLinkageProof } = await this.encrypt({
plaintext: linkageProofBin,
protocolID: [2, 'counterparty linkage revelation'],
keyID: revelationTime,
counterparty: args.verifier
})
return {
prover: identityKey,
verifier: args.verifier,
counterparty: args.counterparty,
revelationTime,
encryptedLinkage,
encryptedLinkageProof
}
}
async revealSpecificKeyLinkage(
args: RevealSpecificKeyLinkageArgs,
originator?: OriginatorDomainNameStringUnder250Bytes
): Promise<RevealSpecificKeyLinkageResult> {
Iif (args.privileged) {
throw privilegedError
}
const { publicKey: identityKey } = await this.getPublicKey({ identityKey: true })
const linkage = this.keyDeriver.revealSpecificSecret(
args.counterparty,
args.protocolID,
args.keyID
)
const { ciphertext: encryptedLinkage } = await this.encrypt({
plaintext: linkage,
protocolID: [2, `specific linkage revelation ${args.protocolID[0]} ${args.protocolID[1]}`],
keyID: args.keyID,
counterparty: args.verifier
})
const { ciphertext: encryptedLinkageProof } = await this.encrypt({
plaintext: [0], // Proof type 0, no proof provided
protocolID: [2, `specific linkage revelation ${args.protocolID[0]} ${args.protocolID[1]}`],
keyID: args.keyID,
counterparty: args.verifier
})
return {
prover: identityKey,
verifier: args.verifier,
counterparty: args.counterparty,
protocolID: args.protocolID,
keyID: args.keyID,
encryptedLinkage,
encryptedLinkageProof,
proofType: 0
}
}
async encrypt(
args: WalletEncryptArgs,
originator?: OriginatorDomainNameStringUnder250Bytes
): Promise<WalletEncryptResult> {
Iif (args.privileged) {
throw privilegedError
}
const key = this.keyDeriver.deriveSymmetricKey(
args.protocolID,
args.keyID,
args.counterparty || 'self'
)
return { ciphertext: key.encrypt(args.plaintext) as number[] }
}
async decrypt(
args: WalletDecryptArgs,
originator?: OriginatorDomainNameStringUnder250Bytes
): Promise<WalletDecryptResult> {
Iif (args.privileged) {
throw privilegedError
}
const key = this.keyDeriver.deriveSymmetricKey(
args.protocolID,
args.keyID,
args.counterparty || 'self'
)
return { plaintext: key.decrypt(args.ciphertext) as number[] }
}
async createHmac(
args: CreateHmacArgs,
originator?: OriginatorDomainNameStringUnder250Bytes
): Promise<CreateHmacResult> {
Iif (args.privileged) {
throw privilegedError
}
const key = this.keyDeriver.deriveSymmetricKey(
args.protocolID,
args.keyID,
args.counterparty || 'self'
)
return { hmac: Hash.sha256hmac(key.toArray(), args.data) }
}
async verifyHmac(
args: VerifyHmacArgs,
originator?: OriginatorDomainNameStringUnder250Bytes
): Promise<VerifyHmacResult> {
Iif (args.privileged) {
throw privilegedError
}
const key = this.keyDeriver.deriveSymmetricKey(
args.protocolID,
args.keyID,
args.counterparty || 'self'
)
const valid = Hash.sha256hmac(key.toArray(), args.data).toString() === args.hmac.toString()
Iif (!valid) {
const e = new Error('HMAC is not valid');
(e as any).code = 'ERR_INVALID_HMAC'
throw e
}
return { valid }
}
async createSignature(
args: CreateSignatureArgs,
originator?: OriginatorDomainNameStringUnder250Bytes
): Promise<CreateSignatureResult> {
Iif (args.privileged) {
throw privilegedError
}
Iif (!args.hashToDirectlySign && !args.data) {
throw new Error('args.data or args.hashToDirectlySign must be valid')
}
const hash: number[] = args.hashToDirectlySign || Hash.sha256(args.data!)
const key = this.keyDeriver.derivePrivateKey(
args.protocolID,
args.keyID,
args.counterparty || 'anyone'
)
return { signature: ECDSA.sign(new BigNumber(hash), key, true).toDER() as number[] }
}
async verifySignature(
args: VerifySignatureArgs,
originator?: OriginatorDomainNameStringUnder250Bytes
): Promise<VerifySignatureResult> {
Iif (args.privileged) {
throw privilegedError
}
Iif (!args.hashToDirectlyVerify && !args.data) {
throw new Error('args.data or args.hashToDirectlyVerify must be valid')
}
const hash: number[] = args.hashToDirectlyVerify || Hash.sha256(args.data!)
const key = this.keyDeriver.derivePublicKey(
args.protocolID,
args.keyID,
args.counterparty || 'self',
args.forSelf
)
const valid = ECDSA.verify(new BigNumber(hash), Signature.fromDER(args.signature), key)
Iif (!valid) {
const e = new Error('Signature is not valid');
(e as any).code = 'ERR_INVALID_SIGNATURE'
throw e
}
return { valid }
}
}
|