最佳答案Understanding Public Key Token in .NET Framework In the world of programming, public key token is a term that is often used in the .NET Framework. It is a uniqu...
Understanding Public Key Token in .NET Framework
In the world of programming, public key token is a term that is often used in the .NET Framework. It is a unique cryptographic key that helps to verify the authenticity of an assembly.
What is an assembly?
An assembly is a collection of one or more files that make up a single component of a .NET application. It can contain executable code, resources, metadata, and other files that are needed by the application to run. Assemblies can be either private or shared.
What is the role of public key token in an assembly?
The public key token is a unique identifier that is created when an assembly is signed with a digital signature. It serves as a proof of authenticity and integrity of the assembly. When an assembly is installed, the public key token is stored in the global assembly cache (GAC) so that it can be easily referenced by other assemblies which depend on it.
The public key token is also used as a security mechanism to prevent unauthorized code from accessing an assembly. This is because the token is generated from the assembly’s digital signature which cannot be altered without invalidating the token.
How is public key token generated?
Public key token is generated by taking a hash of the assembly’s public key and truncating it to create a unique 8-byte value. The process is irreversible and cannot be used to regenerate the original public key. The token is then appended to the assembly’s fully qualified name to create a strong name.
To generate a public key token, you need to use the Strong Name tool (sn.exe) which is included in the .NET SDK. The tool can be run from the command prompt and requires a digital signature to sign the assembly.
In conclusion, public key token is an important component of the .NET Framework. It helps to ensure the authenticity, integrity, and security of assemblies that make up a .NET application. Understanding how it works is crucial for any .NET developer who wants to build secure and reliable applications.
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