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[GH-ISSUE #7] Pad Block Corrupted Exception #4

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opened 2026-02-26 01:35:45 +03:00 by kerem · 5 comments
kerem commented 2026-02-26 01:35:45 +03:00
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Originally created by @markovejnovic on GitHub (Sep 2, 2019).
Original GitHub issue: https://github.com/junian/Standard.Licensing/issues/7

Hello. After reading a private key created with

KeyGenerator keyGen = KeyGenerator.Create();
KeyPair keyPair = keyGen.GenerateKeyPair();
string privateKey = keyPair.ToEncryptedPrivateKeyString(args[Array.IndexOf(args, "--private-key") + 1]);
string publicKey = keyPair.ToPublicKeyString();
File.WriteAllText("privKey.txt", privateKey, Encoding.ASCII);
File.WriteAllText("pubKey.txt", publicKey, Encoding.ASCII);

I am unable to create a license by reading the file:

var utilization = Int32.Parse(args[Array.IndexOf(args, "--license-std") + 3]);
var name = args[Array.IndexOf(args, "--license-std") + 1];
var email = args[Array.IndexOf(args, "--license-std") + 2];
var privKeyLocation = args[Array.IndexOf(args, "--license-std") + 4];
var passPhrase = args[Array.IndexOf(args, "--license-std") + 5];
var privKey = File.ReadAllBytes(privKeyLocation);
var privKeyStr = Encoding.ASCII.GetString(privKey);
ILicenseBuilder license = License.New()
	.WithUniqueIdentifier(Guid.NewGuid())
	.As(LicenseType.Standard)
	.WithMaximumUtilization(utilization)
	.LicensedTo(name, email);
License l = license.CreateAndSignWithPrivateKey(privKeyStr, passPhrase);

due to an exception thrown by BouncyCastle:

Org.BouncyCastle.Crypto.InvalidCipherTextException: 'pad block corrupted'
Originally created by @markovejnovic on GitHub (Sep 2, 2019). Original GitHub issue: https://github.com/junian/Standard.Licensing/issues/7 Hello. After reading a private key created with ```c# KeyGenerator keyGen = KeyGenerator.Create(); KeyPair keyPair = keyGen.GenerateKeyPair(); string privateKey = keyPair.ToEncryptedPrivateKeyString(args[Array.IndexOf(args, "--private-key") + 1]); string publicKey = keyPair.ToPublicKeyString(); File.WriteAllText("privKey.txt", privateKey, Encoding.ASCII); File.WriteAllText("pubKey.txt", publicKey, Encoding.ASCII); ``` I am unable to create a license by reading the file: ```c# var utilization = Int32.Parse(args[Array.IndexOf(args, "--license-std") + 3]); var name = args[Array.IndexOf(args, "--license-std") + 1]; var email = args[Array.IndexOf(args, "--license-std") + 2]; var privKeyLocation = args[Array.IndexOf(args, "--license-std") + 4]; var passPhrase = args[Array.IndexOf(args, "--license-std") + 5]; var privKey = File.ReadAllBytes(privKeyLocation); var privKeyStr = Encoding.ASCII.GetString(privKey); ILicenseBuilder license = License.New() .WithUniqueIdentifier(Guid.NewGuid()) .As(LicenseType.Standard) .WithMaximumUtilization(utilization) .LicensedTo(name, email); License l = license.CreateAndSignWithPrivateKey(privKeyStr, passPhrase); ``` due to an exception thrown by `BouncyCastle`: ``` Org.BouncyCastle.Crypto.InvalidCipherTextException: 'pad block corrupted' ```
kerem commented 2026-02-26 01:35:46 +03:00
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@markovejnovic commented on GitHub (Sep 2, 2019):

This seems to be an issue with using a string in CreateAndSignPrivateKey, due to the padding block being truncated as described here.

<!-- gh-comment-id:527246296 --> @markovejnovic commented on GitHub (Sep 2, 2019): This seems to be an issue with using a `string` in `CreateAndSignPrivateKey`, due to the padding block being truncated as described [here](https://stackoverflow.com/questions/4560461/decryption-error-pad-block-corrupted).
kerem commented 2026-02-26 01:35:46 +03:00
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@markovejnovic commented on GitHub (Sep 2, 2019):

Worth noting that my key generation and license generation code snippets are two different code blocks.

<!-- gh-comment-id:527246585 --> @markovejnovic commented on GitHub (Sep 2, 2019): Worth noting that my key generation and license generation code snippets are two different code blocks.
kerem commented 2026-02-26 01:35:46 +03:00
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@brlauuu commented on GitHub (Jan 10, 2020):

I am storing the license to a file as well and reading it from it after. However, I'm using File.ReadAllText(path) instead of FIle.ReadAllBytes(path) like you are. Maybe it's worth trying like that.

<!-- gh-comment-id:573019031 --> @brlauuu commented on GitHub (Jan 10, 2020): I am storing the license to a file as well and reading it from it after. However, I'm using `File.ReadAllText(path)` instead of `FIle.ReadAllBytes(path)` like you are. Maybe it's worth trying like that.
kerem commented 2026-02-26 01:35:46 +03:00
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@davidpetric commented on GitHub (Jul 27, 2020):

Hello,

For anyone who is trying this NuGet I have downloaded the project source code and run the unit test for generating the license and it worked...then I checked my code and I think that Visual Studio used a wrong namespace for the KeyGenerator class.

Here is my code that generates the private and public keys that works:

namespace StandardLicensingLicenseGenerator
{
    using System;

    public class KeysGenerator
    {
        public Tuple<string, string> Generate(string secretPassPhrase)
        {
            var keyGenerator = Standard.Licensing.Security.Cryptography.KeyGenerator.Create();
            var keyPair = keyGenerator.GenerateKeyPair();

            var privateKey = keyPair.ToEncryptedPrivateKeyString(secretPassPhrase);
            var publicKey = keyPair.ToPublicKeyString();

            return new Tuple<string, string>(privateKey, publicKey);
        }
    }
}
<!-- gh-comment-id:664167202 --> @davidpetric commented on GitHub (Jul 27, 2020): Hello, For anyone who is trying this NuGet I have downloaded the project source code and run the unit test for generating the license and it worked...then I checked my code and I think that Visual Studio used a wrong namespace for the KeyGenerator class. Here is my code that generates the private and public keys that works: ```cs namespace StandardLicensingLicenseGenerator { using System; public class KeysGenerator { public Tuple<string, string> Generate(string secretPassPhrase) { var keyGenerator = Standard.Licensing.Security.Cryptography.KeyGenerator.Create(); var keyPair = keyGenerator.GenerateKeyPair(); var privateKey = keyPair.ToEncryptedPrivateKeyString(secretPassPhrase); var publicKey = keyPair.ToPublicKeyString(); return new Tuple<string, string>(privateKey, publicKey); } } } ```
kerem commented 2026-02-26 01:35:46 +03:00
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@mudasar commented on GitHub (Jul 25, 2024):

I am facing the same issue every thing was working fine until last year and now i have to generate a new license and all of sudden the keys pad lock broken issue is there. even unable to parse the old licenses (with old keys) base64 error

<!-- gh-comment-id:2251071241 --> @mudasar commented on GitHub (Jul 25, 2024): I am facing the same issue every thing was working fine until last year and now i have to generate a new license and all of sudden the keys pad lock broken issue is there. even unable to parse the old licenses (with old keys) base64 error
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