RSAPrivateKey.fromString constructor
RSAPrivateKey.fromString(
- String privateKeyString
Create an RSAPrivateKey from the given String.
Implementation
RSAPrivateKey.fromString(String privateKeyString) {
List<int> privateKeyDER = base64Decode(privateKeyString);
var asn1Parser = ASN1Parser(privateKeyDER as Uint8List);
final topLevelSeq = asn1Parser.nextObject() as ASN1Sequence;
final privateKey = topLevelSeq.elements[2];
asn1Parser = ASN1Parser(privateKey.contentBytes());
final pkSeq = asn1Parser.nextObject() as ASN1Sequence;
final modulus = pkSeq.elements[1] as ASN1Integer;
final privateExponent = pkSeq.elements[3] as ASN1Integer;
final p = pkSeq.elements[4] as ASN1Integer;
final q = pkSeq.elements[5] as ASN1Integer;
_privateKey = pointy.RSAPrivateKey(
modulus.valueAsBigInteger,
privateExponent.valueAsBigInteger,
p.valueAsBigInteger,
q.valueAsBigInteger);
}