Unable To Generate Key Pair Please Use New Token

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I could finally spot the issue after digging into the python code. The code is failing when calling 'serialization.loadsshpublickey(pubbytes, backends.defaultbackend)' in crypto.py because the python cryptography is calling an old python-cffi module. Creating a Key Pair on the eToken. Select File on the menu, then New PGP Key. In the PGP Key Generation Wizard window, check the box labeled Generate Key or Token: Aladdin Knowledge Systems LTD. EToken CardOS/M4, and click Next. Enter a name for the key in the Full Name field. The Key-ID and the associated key-pairs status are now marked as ACTIVE and ready for use. You can also generate a second set of key-pairs, if required. This is to help you in cases where your current key-pair is compromised or certificate is about to expire. Follow the step (1-5) mentioned above to generate the second key-pair.

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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:

Unable To Generate Key Pair Please Use New Token

  • By using the Signing tab in a project's Properties dialog box in Visual Studio. This is the easiest and most convenient way to sign an assembly with a strong name.

  • By using the Assembly Linker (Al.exe) to link a .NET Framework code module (a .netmodule file) with a key file.

    This information describes how to generate an SSH key pair using OpenSSH. Generating an SSH key pair using OpenSSH. About this task. Set up an RSA key pair on the AIX® or Linux host and the clustered system: Procedure. Create an RSA key pair by issuing a command on the host that is similar to this command: ssh-keygen -t rsa. In the Number of bits in a generated key box, enter 2048. Click Generate to generate a public/private key pair. As the key is being generated, move the mouse around the blank area as directed. (Optional) Enter a passphrase for the private key in the Key passphrase box and reenter it in the Confirm passphrase box. Create new ssh key. May 17, 2019  The command generates an SSH key pair consisting of a public key and a private key, and saves them in the specified path. The file name of the public key is created automatically by appending.pub to the name of the private key file. For example, if the file name of the SSH private key is idrsa, then the file name of the public key would be pub.

  • By using assembly attributes to insert the strong name information into your code. You can use either the AssemblyKeyFileAttribute or the AssemblyKeyNameAttribute attribute, depending on where the key file to be used is located.

  • By using compiler options.

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 Studio

  1. In Solution Explorer, open the shortcut menu for the project, and then choose Properties.

  2. Choose the Signing tab.

  3. Select the Sign the assembly box.

  4. In the Choose a strong name key file box, choose Browse, and then navigate to the key file. To create a new key file, choose New and enter its name in the Create Strong Name Key dialog box.

Note

In order to delay sign an assembly, choose a public key file.

New

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:

  • assemblyName is the name of the strongly signed assembly (a .dll or .exe file) that Assembly Linker will emit.

  • moduleName is the name of a .NET Framework code module (a .netmodule file) that includes one or more types. You can create a .netmodule file by compiling your code with the /target:module switch in C# or Visual Basic.

  • keyfileName is the name of the container or file that contains the key pair. Assembly Linker interprets a relative path in relation to the current directory.

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

  1. Add the System.Reflection.AssemblyKeyFileAttribute or AssemblyKeyNameAttribute attribute to your source code file, and specify the name of the file or container that contains the key pair to use when signing the assembly with a strong name.

  2. Compile the source code file normally.

    Note

    The C# and Visual Basic compilers issue compiler warnings (CS1699 and BC41008, respectively) when they encounter the AssemblyKeyFileAttribute or AssemblyKeyNameAttribute attribute in source code. You can ignore the warnings.

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.

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.

See also

  • October 2, 2015
  • Posted by: Syed Shujaat
  • Category: Cisco, Networking Solutions

Use this command to generate RSA key pairs for your Cisco device (such as a router). keys are generated in pairs–one public RSA key and one private RSA key.

If your router already has RSA keys when you issue this command, you will be warned and prompted to replace the existing keys with new keys.

NOTE: Before issuing this command, ensure that your router has a hostname and IP domain name configured (with the hostname and ipdomain-name commands).

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You will be unable to complete the cryptokeygeneratersacommand without a hostname and IP domain name. (This situation is not true when you generate only a named key pair.)

Here are the steps to Enable SSH and Crypto Key setup : 2 config must requried for SSH

1 Setup Local VTY line User ID and password

router (Config) # Line VTY 0 15

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router (Config-line)# login local

router (Config-line)# Exit

!!! create local login ID/Pass

router (Config)# username [loginid] password [cisco]

router (Config)# username loginid1 password cisco1

2. router (Config)# ip domain-name example.com

router (Config)# crypto key generate rsa

how many bits in the modulus [512] :1024

router (Config)# ip ssh version2

router (Config)# CTRL Z


Note

Secure Shell (SSH) may generate an additional RSA key pair if you generate a key pair on a router having no RSA keys. The additional key pair is used only by SSH and will have a name such as {router_FQDN }.server.

For example, if a router name is “router1.cisco.com,” the key name is “router1.cisco.com.server.”

This command is not saved in the router configuration; however, the RSA keys generated by this command are saved in the private configuration in NVRAM (which is never displayed to the user or backed up to another device) the next time the configuration is written to NVRAM.

Modulus Length

When you generate RSA keys, you will be prompted to enter a modulus length. The longer the modulus, the stronger the security. However, a longer modules take longer to generate (see the table below for sample times) and takes longer to use.

The size of Key Modulus range from 360 to 2048. Choosing modulus greater than 512 will take longer time.

Router360 bits512 bits1024 bits2048 bits (maximum)
Cisco 250011 seconds20 seconds4 minutes, 38 secondsMore than 1 hour
Cisco 4700Less than 1 second1 second4 seconds50 seconds

Cisco IOS software does not support a modulus greater than 4096 bits. A length of less than 512 bits is normally not recommended. In certain situations, the shorter modulus may not function properly with IKE, so we recommend using a minimum modulus of 2048 bits.

Syntax Description : Optional Strings to embed with SSH Crypto key

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general-keys(Optional) Specifies that a general-purpose key pair will be generated, which is the default.
usage-keys(Optional) Specifies that two RSA special-usage key pairs, one encryption pair and one signature pair, will be generated.
signature(Optional) Specifies that the RSA public key generated will be a signature special usage key.
encryption(Optional) Specifies that the RSA public key generated will be an encryption special usage key.
labelkey-label(Optional) Specifies the name that is used for an RSA key pair when they are being exported.If a key label is not specified, the fully qualified domain name (FQDN) of the router is used.
exportable(Optional) Specifies that the RSA key pair can be exported to another Cisco device, such as a router.
modulusmodulus-size(Optional) Specifies the IP size of the key modulus.By default, the modulus of a certification authority (CA) key is 1024 bits. The recommended modulus for a CA key is 2048 bits. The range of a CA key modulus is from 350 to 4096 bits.
Note Effective with Cisco IOS XE Release 2.4 and Cisco IOS Release 15.1(1)T, the maximum key size was expanded to 4096 bits for private key operations. The maximum for private key operations prior to these releases was 2048 bits.
storagedevicename:(Optional) Specifies the key storage location. The name of the storage device is followed by a colon (:).
redundancy(Optional) Specifies that the key should be synchronized to the standby CA.
ondevicename:(Optional) Specifies that the RSA key pair will be created on the specified device, including a Universal Serial Bus (USB) token, local disk, or NVRAM. The name of the device is followed by a colon (:).Keys created on a USB token must be 2048 bits or less.
CommandDescription
copyCopies any file from a source to a destination, use the copy command in privileged EXEC mode.
cryptokeystorageSets the default storage location for RSA key pairs.
debugcryptoengineDisplays debug messages about crypto engines.
hostnameSpecifies or modifies the hostname for the network server.
ipdomain-nameDefines a default domain name to complete unqualified hostnames (names without a dotted-decimal domain name).
showcryptokeymypubkeyrsaDisplays the RSA public keys of your router.
show crypto pki certificatesDisplays information about your PKI certificate, certification authority, and any registration authority certificates.

Unable To Generate Key Pair Please Use New Token Card