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init for add proof

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This commit is contained in:
Bill Barman 2018-11-20 17:44:25 +08:00
parent 72e09f3c22
commit d692bd8cda
1 changed files with 39 additions and 0 deletions
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39
src/libDDO/DDO.ts
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@ -47,6 +47,15 @@ export default class DDO {
}
return false
}
public static signText(text: string, keyValue: string, authenticationType: string): string {
var signature = ""
if ( authenticationType === Authentication.TYPE_RSA ) {
var key = ursa.createPrivateKey(keyValue, "", "utf8")
signature = key.hashAndSign("SHA256", text, "utf8", "utf8")
}
return signature
}
public context: string = DDO.CONTEXT
public did: string
@ -154,12 +163,19 @@ export default class DDO {
keyType = PublicKey.PEM
}
if (keyType === PublicKey.PEM ) {
// generate the key pairs
const keys = ursa.generatePrivateKey(1024, 65537)
// add a public key record
const nextIndex = this.publicKeys.length + 1
const keyId = (this.did ? this.did : "" ) + "#keys=" + nextIndex
const publicKey = new PublicKey({id: keyId, owner: keyId, type: keyType})
publicKey.value = keys.toPublicPem("utf8")
this.publicKeys.push(publicKey)
// add an authentication record
const authentication = new Authentication({ publicKey: publicKey.id, type: publicKey.type})
this.authentications.push(authentication)
return keys.toPrivatePem("utf8")
}
return null
@ -174,6 +190,29 @@ export default class DDO {
return service
}
public addProof(authIndex, privateKey, signatureText) {
if ( authIndex == null ) {
authIndex = 0
}
const authentication = this.authentications[authIndex]
// get the public key stored for this authentication
const publicKey = this.getPublicKey(authentication.publicKeyId)
if ( signatureText == null ) {
signatureText = this.hashTextList().join()
}
const signature = DDO.signText(signatureText, privateKey, publicKey.type)
const signatureBuffer = new Buffer(signature, 'ascii')
const date = new Date()
this.proof = new Proof({
created: date.toISOString(),
creator: publicKey.id,
type: publicKey.type,
signatureValue: signatureBuffer.toString("base64"),
})
}
public isProofDefined(): boolean {
return this.proof != null
}