The Strong Name tool (Sn.exe) helps sign assemblies with strong names. Sn.exe provides options for key management, signature generation, and signature verification.
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Warning
Do not rely on strong names for security. They provide a unique identity only.
My product needs to be able to generate.snk files (without having Microsoft SDKs installed on the system). I can generate a working SNK file, but I can not seem to get it to work when specifying a. How to generate strong-naming SNK key file with.net libraries. Ask Question Asked 8 years, 6 months ago. Required, but never. 'Cannot import the following key file: something.pfx The key file may be password protected. To correct this, try to import the certificate again or manually install the certificate to the Strong Name CSP with the following key container name: VSKEY33FA18307607ECFB' So I am doing that using. Sn -i something.pfx VSKEY33FA18307607ECFB.
For more information on strong naming and strong-named assemblies, see Strong-Named Assemblies and How to: Sign an Assembly with a Strong Name.
The Strong Name tool is automatically installed with Visual Studio. To start the tool, use the Developer Command Prompt (or the Visual Studio Command Prompt in Windows 7). For more information, see Command Prompts.
Note
On 64-bit computers, run the 32-bit version of Sn.exe by using the Developer Command Prompt for Visual Studio and the 64-bit version by using the Visual Studio x64 Win64 Command Prompt.
At the command prompt, type the following:
SyntaxParameters
Note
All Sn.exe options are case-sensitive and must be typed exactly as shown to be recognized by the tool.
Generate Strong Name Key File FreeRemarks
The -R and –Rc options are useful with assemblies that have been delay-signed. In this scenario, only the public key has been set at compile time and signing is performed later, when the private key is known.
Note
For parameters (for example, –Vr) that write to protected resources such as the registry, run SN.exe as an administrator.
The Strong Name tool assumes that public/private key pairs are generated with the
AT_SIGNATURE algorithm identifier. Public/private key pairs generated with the AT_KEYEXCHANGE algorithm generate an error.
Examples
The following command creates a new, random key pair and stores it in
keyPair.snk .
The following command stores the key in
keyPair.snk in the container MyContainer in the strong name CSP.
The following command extracts the public key from
keyPair.snk and stores it in publicKey.snk .
The following command displays the public key and the token for the public key contained in
publicKey.snk .
The following command verifies the assembly
MyAsm.dll .
The following command deletes
MyContainer from the default CSP.
See also-->Generate Strong Name Key File For Mac
Note
Although .NET Core supports strong-named assemblies, and all assemblies in the .NET Core library are signed, the majority of third-party assemblies do not need strong names. For more information, see Strong Name Signing on GitHub.
There are a number of ways to sign an assembly with a strong name:
Generate Strong Name Key File Download
You must have a cryptographic key pair to sign an assembly with a strong name. For more information about creating a key pair, see How to: Create a public-private key pair.
Create and sign an assembly with a strong name by using Visual StudioGenerate Strong Name Key File Online
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Note
In order to delay sign an assembly, choose a public key file.
Create and sign an assembly with a strong name by using the Assembly Linker
At the Developer Command Prompt for Visual Studio, enter the following command:
al/out:<assemblyName> <moduleName>/keyfile:<keyfileName>
Where:
The following example signs the assembly MyAssembly.dll with a strong name by using the key file sgKey.snk.
For more information about this tool, see Assembly Linker.
Sign an assembly with a strong name by using attributes
The following example uses the AssemblyKeyFileAttribute attribute with a key file called keyfile.snk, which is located in the directory where the assembly is compiled.
You can also delay sign an assembly when compiling your source file. For more information, see Delay-sign an assembly.
Sign an assembly with a strong name by using the compiler
Compile your source code file or files with the
/keyfile or /delaysign compiler option in C# and Visual Basic, or the /KEYFILE or /DELAYSIGN linker option in C++. After the option name, add a colon and the name of the key file. When using command-line compilers, you can copy the key file to the directory that contains your source code files.
Create A Strong Name Key File
For information on delay signing, see Delay-sign an assembly.
The following example uses the C# compiler and signs the assembly UtilityLibrary.dll with a strong name by using the key file sgKey.snk.
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