RSAPublicKey.fromString constructor
RSAPublicKey.fromString(
- String publicKeyString
Create an RSAPublicKey from the given String.
Implementation
RSAPublicKey.fromString(String publicKeyString) {
List<int> publicKeyDER = base64Decode(publicKeyString);
final asn1Parser = ASN1Parser(publicKeyDER as Uint8List);
final topLevelSeq = asn1Parser.nextObject() as ASN1Sequence;
final publicKeyBitString = topLevelSeq.elements[1];
final publicKeyAsn = ASN1Parser(publicKeyBitString.contentBytes());
final publicKeySeq = publicKeyAsn.nextObject() as ASN1Sequence;
final modulus = publicKeySeq.elements[0] as ASN1Integer;
final exponent = publicKeySeq.elements[1] as ASN1Integer;
_publicKey = pointy.RSAPublicKey(
modulus.valueAsBigInteger, exponent.valueAsBigInteger);
}