help to decode generateRsaCsrPem with x509CertificateFromPem

CyberDepot commented 4 years ago

Hi, Thank you for this library i use X509Utils version ^2.6.2

i need to generate a certificate and keep public key on the certificate for share to other i want to use certificate for sign, verifiy sign and key exchange i wnat to give the certificate to customers (certificate with public key) i want to generate a qr code for sharing certificate then when i sign a string and send for them, customers will find out if I signed it or not or i want to use asymmetric encryption with certificate, i encrypt a string with certificate private key and send for customers and they can decrypt string with my certificate (if i give to them In the form of qr code)

i see the web, you examples, issues and you test but i cant decrypt pem certificate and find public key

i use this code

var dn = {
    'CN': 'basic-utils.dev',
    'O': 'Magic Company',
    'OU': 'org unit',
    'L': 'Fakecity',
    'S': 'FakeState',
    'C': 'DE',
};

keypair = CryptoUtils.generateRSAKeyPair();
var csr = X509Utils.generateRsaCsrPem(dn, keypair.privateKey, keypair.publicKey);

i generate certificate and check this on this link https://www.sslchecker.com/csr/decode

i put the certificate for you

i try to decode certificate with this code

X509CertificateData data = X509Utils.x509CertificateFromPem(csr);

String commonName = data.subject["2.5.4.3"];
print(commonName);

but give me this error

E/flutter ( 8688): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: type 'ASN1Set' is not a subtype of type 'ASN1ObjectIdentifier' in type cast
E/flutter ( 8688): #0      X509Utils.x509CertificateFromPem (package:basic_utils/src/X509Utils.dart:245:53)

i use from this website and generate a certificate https://www.samltool.com/self_signed_certs.php

when i use CSR thats give me error but when i use X.509 cert thats work very good so i put X.509 cert for you

i dont know what is the problem but i need to generate a certificate Just like the top X.509 cert certificate if you know a package for generate this type please say to me if toy can help me to generate this certificate i will be very grateful please help me for solved the problem thank you

Ephenodrom commented 4 years ago

Hello @CyberDepot

This package is not for GENERATING X509 certificates. This package only helps you doing the following things :

Generating RSA / ECC private and public keys
Generating CSR using a RSA or ECC key pairs
Decoding X509 certificates given as a PEM string

So for me it looks like you want to create a self signed certificate, is this right ?

Tienisto commented 1 year ago

In case somebody come accross this. Here is an example to generate a X509 certificate using basic_utils v5.4.2:

  final keyPair = CryptoUtils.generateRSAKeyPair();
  final privateKey = keyPair.privateKey as RSAPrivateKey;
  final publicKey = keyPair.publicKey as RSAPublicKey;
  final dn = {
    'CN': 'Mr A.',
    'O': '',
    'OU': '',
    'L': '',
    'S': '',
    'C': '',
  };
  final csr = X509Utils.generateRsaCsrPem(dn, privateKey, publicKey);

 // this is the certificate in PEM format
  final certificate = X509Utils.generateSelfSignedCertificate(keyPair.privateKey, csr, 30);

CyberDepot commented 1 year ago

In case somebody come accross this. Here is an example to generate a X509 certificate using basic_utils v5.4.2:

  final keyPair = CryptoUtils.generateRSAKeyPair();
  final privateKey = keyPair.privateKey as RSAPrivateKey;
  final publicKey = keyPair.publicKey as RSAPublicKey;
  final dn = {
    'CN': 'Mr A.',
    'O': '',
    'OU': '',
    'L': '',
    'S': '',
    'C': '',
  };
  final csr = X509Utils.generateRsaCsrPem(dn, privateKey, publicKey);

 // this is the certificate in PEM format
  final certificate = X509Utils.generateSelfSignedCertificate(keyPair.privateKey, csr, 30);

thank you, i check it

Ephenodrom / Dart-Basic-Utils

help to decode generateRsaCsrPem with x509CertificateFromPem #21