sn - Digitally sign/verify/compare strongname on CLR assemblies.

sn [-q | -quiet] [options] [parameters]

Digitally sign, verify or compare, CLR assemblies using strongnames.

Configuration options are stored in the machine.config configuration file under /configuration/strongNames.

-c provider

Change the default CSP (Crypto Service Provider). Currently not supported in Mono.

-m [y|n]

Use a machine [y] key container or a user [n] key container. Currently not supported in Mono.

-Vl

List the verification options. The list is kept under /configuration/ strongNames/verificationSettings in machine.config.

-Vr assembly [userlist]

Exempt the specified assembly from verification for the specified user list. Currently not supported by sn, you must edit machine.config manually if you require this.

-Vu assembly

Remove the exemption entry for the specified assembly. Currently not supported by sn, you must edit machine.config manually if you require this.

-Vx

Remove all exemptions entries. Currently not supported by sn, you must edit machine.config manually if you require this.

-d container

Delete the keypair present in the specified key container.

-i keypair.snk container

Import the specified strongname file into the specified container.

-pc container publickey

Export the public key from the specified CSP container to the specified file.

-e assembly output.pub

Export the assembly public key to the specified output file.

-p keypair.snk output.pub

Export the public key from the specified strongname key file (SNK) to the specified output file.

-o input output.txt

Convert the input file to a CSV file (using decimal).

-oh input output.txt

Convert the input file to a CSV file (using hexadecimal).

-D assembly1 assembly2

Compare if assembly1 and assembly are the same exception for their signature. This is done by comparing the hash of the metadata of both assembly.

-k [size] keypair.snk

Create a new strongname keypair in the specified file. The default key length is 1024 bits and MUST ALWAYS be used when signing 1.x assemblies. Any value from 384 to 16384 bits (in increments of 8 bits) is a valid key length to sign 2.x assemblies. To ensure maximum compatibility you may want to continue using 1024 bits keys. Note that there's no good reason, even if it's possible, to use length lesser than 1024 bits.

-R assembly keypair.snk

Resign the specified assembly using the specified strongname keypair file (SNK). You can only sign an assembly with the private key (SNK) that match the public key inside the assembly (unless it's public key token has been remapped in machine.config).

-Rc assembly container

Resign the specified assembly using the specified strongname container.

-t file

Show the public key from the specified file.

-tp file

Show the public key and the public key token from the specified file.

-T assembly

Show the public key from the specified assembly.

-Tp assembly

Show the public key and the public key token from the specified assembly.

-v assembly

Verify the specified assembly signature.

-vf assembly

Verify the specified assembly signature (even if disabled).

-h , -?

Display basic help about this tool.

-h config , -? config

Display configuration related help about this tool.

-h csp , -? csp

Display Cryptographic Service Provider related help about this tool.

-h convert , -? convert

Display convertion related help about this tool.

-h sn , -? sn

Display strongname related help about this tool.

Strongnames configuration is kept in "machine.config" file. Currently two

features can be configured.

/configuration/strongNames/pubTokenMapping

This mechanism let Mono remap a public key token, like the ECMA token, to another public key for verification. This is useful in two scenarios. First assemblies signed with the "ECMA key" needs to be verified by the "runtime" key (as the ECMA key isn't a public key). Second, many assemblies are signed with private keys that Mono can't use (e.g. System.Security.dll assembly). A new key cannot be used because it should change thr strongname (a new key pair would have a new public key which would produce a new token). Public key token remapping is the solution for both problems. Each token must be configured in a "map" entry similar to this one: <map Token="b77a5c561934e089" PublicKey="00..." />

/configuration/strongNames/verificationSettings

It is often useful during development to use delay signed assemblies. Normally* the runtime wouldn't allow delay-signed assemblies to be loaded. This feature allows some delay-signed assemblies (based on their public key token, optionally assembly name and user name) to be used like they were fully signed assemblies. [*] Note that Mono 1.0 "runtime" doesn't validate strongname signatures so this option shouldn't be required in most scenarios.

Written by Sebastien Pouliot

Copyright (C) 2003 Motus Technologies. Copyright (C) 2004 Novell. Released under BSD license.

Visit http://lists.ximian.com/mailman/listinfo/mono-list for details.

Visit http://www.mono-project.com for details

secutil(1)