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extract public from private key

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This commit is contained in:
Kyle Spearrin
2018-07-02 23:53:44 -04:00
parent e22915818c
commit 2bc7ae0da2
5 changed files with 49 additions and 1 deletions
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10
src/services/nodeCryptoFunction.service.ts
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@@ -133,6 +133,16 @@ export class NodeCryptoFunctionService implements CryptoFunctionService {
return Promise.resolve(this.toArrayBuffer(decipher));
}
async rsaExtractPublicKey(privateKey: ArrayBuffer): Promise<ArrayBuffer> {
const privateKeyByteString = Utils.fromBufferToByteString(privateKey);
const privateKeyAsn1 = forge.asn1.fromDer(privateKeyByteString);
const forgePrivateKey = (forge as any).pki.privateKeyFromAsn1(privateKeyAsn1);
const forgePublicKey = (forge.pki as any).setRsaPublicKey(forgePrivateKey.n, forgePrivateKey.e);
const publicKeyAsn1 = (forge.pki as any).publicKeyToAsn1(forgePublicKey);
const publicKeyByteString = forge.asn1.toDer(publicKeyAsn1).data;
return Utils.fromByteStringToArray(publicKeyByteString).buffer;
}
randomBytes(length: number): Promise<ArrayBuffer> {
return new Promise<ArrayBuffer>((resolve, reject) => {
crypto.randomBytes(length, (error, bytes) => {