decode static method
Implementation
static CryptoRSAPrivateKey decode(String encodedKey) {
ASN1Parser topLevelParser = ASN1Parser(base64.decode(encodedKey));
ASN1Sequence topLevelSeq = topLevelParser.nextObject() as ASN1Sequence;
ASN1OctetString privateKeyOctet =
topLevelSeq.elements![2] as ASN1OctetString;
ASN1Sequence publicKeySeq =
ASN1Sequence.fromBytes(privateKeyOctet.octets as Uint8List);
ASN1Integer modulus = publicKeySeq.elements![1] as ASN1Integer;
ASN1Integer privateExponent = publicKeySeq.elements![3] as ASN1Integer;
ASN1Integer prime1 = publicKeySeq.elements![4] as ASN1Integer;
ASN1Integer prime2 = publicKeySeq.elements![5] as ASN1Integer;
return CryptoRSAPrivateKey(modulus.integer!, privateExponent.integer!,
prime1.integer, prime2.integer);
}