February 21, 2025

Crypt2.SetEncodedKey – Help! I Passed a non-Hex String but Told Chilkat it was Hex

You made a mistake and set an AES encryption key in the wrong way like this: Chilkat.Crypt2 crypt = new Chilkat.Crypt2(); crypt.KeyLength = 256; crypt.CryptAlgorithm = “aes”; // This is the error. We passed base64 (or anything that is NOT a hexidecimal string) // And then asked Chilkat to decode it as hex. crypt.SetEncodedKey(“rZFNAfY7CirLtWxKiRU187k9mqcGCBZnV4QrmBvsboE”,”hex”); And then we proceeded to encrypt […]

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January 12, 2025

Using a .nupkg for Temporary Development Use

To add a reference to a “.nupkg” file (a NuGet package) in a .NET 6.0 project, you can follow these steps: Option 1: Add the .nupkg File to a Local NuGet Source Create a Local NuGet Source: Place your “.nupkg” file in a folder, e.g., “C:\NuGetPackages”. Configure the Local Source in NuGet: Open a terminal or command prompt and run: […]

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January 4, 2025

Be Careful when Using non-us-ascii String Literals in Source Code

When using non-US-ASCII literal strings (e.g., accented characters like “é”, “ü”, or symbols from other scripts like “你好”) in source code, it’s crucial to handle them carefully due to potential issues with encoding, interpretation, and compatibility. Here’s an explanation of key considerations: 1. Source Code File Encoding Encoding Matters: The source code file must be saved in an encoding that […]

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December 6, 2024

FTP Rename Remote File – What Happens if the Target Remote File Already Exists?

The behavior of the FTP “RNTO” command when the target file already exists depends on the FTP server implementation and configuration. The File Transfer Protocol (FTP) itself, as defined in RFC 959, does not explicitly specify what should happen in this case, leaving it up to the server’s discretion. Typical Behaviors for “RNTO” When the Target File Exists Overwrite the […]

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October 31, 2024

How ASN.1 Encodes Lengths

In ASN.1 (Abstract Syntax Notation One), lengths are encoded as part of the TLV (Type-Length-Value) structure, where each element consists of: Type: Identifies the data type of the element. Length: Specifies the number of bytes that make up the element’s content. Value: Contains the actual data or content. The Length field in ASN.1 encoding is designed to allow both short […]

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October 31, 2024

What is a .p7m or .p7s File?

“.p7m” and “.p7s” files are both related to PKCS #7 (Public Key Cryptography Standards #7) and are used for secure email and digital signatures. These files encapsulate data with cryptographic signatures and certificates to verify the identity of the sender and/or the integrity of the message. 1. “.p7m” File (Signed and Encrypted Content) Description: A “.p7m” file is a digitally […]

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October 25, 2024

OCSP Nonce Lengths

In the OCSP (Online Certificate Status Protocol), the nonce is an optional field used to prevent replay attacks by ensuring that the OCSP response corresponds to the specific OCSP request. The nonce is a randomly generated value included in the OCSP request and echoed back in the response by the OCSP server. Nonce Length in OCSP There is no strict […]

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October 16, 2024

Code Signing with a USB Token

Here are examples for code signing with a USB token.. AutoIt Code Signing using Sectigo USB Token C Code Signing using Sectigo USB Token Python Code Signing using Sectigo USB Token C++ Code Signing using Sectigo USB Token C# Code Signing using Sectigo USB Token DataFlex Code Signing using Sectigo USB Token Delphi Code Signing using Sectigo USB Token .NET […]

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October 14, 2024

Wasabi: The provided ‘x-amz-content-sha256’ header does not match what was computed.

As of 14-Oct-2024, Wasabi (an S3 compatible service), does not understand that uppercase/lowercase hex should not matter.. <Error> <Code>XAmzContentSHA256Mismatch</Code> <Message>The provided ‘x-amz-content-sha256’ header does not match what was computed.</Message> <ClientComputedContentSHA256>8AFBD736EC2917807F5FF5D8A9018846AA9D6B25EC839506DACE0D588DE491C5</ClientComputedContentSHA256> <S3ComputedContentSHA256>8afbd736ec2917807f5ff5d8a9018846aa9d6b25ec839506dace0d588de491c5</S3ComputedContentSHA256> <RequestId>…</RequestId> <HostId>…</HostId> <CMReferenceId>…</CMReferenceId> </Error>

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October 14, 2024

How to Setup a Google Service Account to Send Email via GMail

Sending GMail from a Google Service Account can be a complicated undertaking w.r.t. setting things up in your Google account correctly. If something is not correct, the only indication of an error will be that the SMTP authentication fails. The best one can do is to first fully understand Google Service Accounts: Explaining Google Service Accounts   Then read about […]

Uncategorized 0 24 sec read

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