Man Crypto Key Generate Rsa

 

May 25, 2015 What is this? Microsoft Crypto RSA MachineKeys - posted in General Security: Hello all sorry for the wrong typing because English is not my first language - I have found a file in my computer. Run show crypto key mypubkey rsa to see if you do, in fact, have a key fully generated and registered under a non-default name. If there is, then you can tell the ssh process to use this key with ip ssh rsa keypair-name xxx.If the first command doesn't show anything useful then I'd say you can go ahead and generate a new key.

Reproduced in http://www.xdty.org/1678

In the project you need to add a registration function, think of using RSA Asymmetric encryption method. Third-party libraries such as OpenSSL were compared, and Cryptopp was used.
1. source File Collation
You can get the source files of the library in http://www.cryptopp.com/, and then archive the files again after extracting them. The header file is placed in the Include folder and the CPP is placed in the SRC directory. All test-related CPP and non-CPP and H files are also removed. Copy the Cryptopp directory to the project directory
2. Join the project
Add a new filter to the VS2010 project, named Cryptopp, and add the sub filter include and SRC. Import the H file under include into the Include and import the CPP under SRC to the SRC filter.
3. Compiling
Open src, select all CPP files, change the properties, and modify the precompiled header to PCH.H. The VC + + path of the project is updated to add include and SRC.
Compile the project, if you compile but modify the error.
4. Generate RSA public key, private key, save to file after Base64 encoding
Some header files need to be imported:

RSAgeneratekey generates a key pair and returns it in a newly allocated RSA structure. The pseudo-random number generator must be seeded prior to calling RSAgeneratekey. The modulus size will be num bits, and the public exponent will be e. Key sizes with num. May 24, 2015  What is this?MicrosoftCryptoRSAMachineKeys - posted in General Security: Hello all sorry for the wrong typing because English is not my first language. Jan 14, 2018 Router(config)# crypto key generate rsa general-keys The name for the keys will be: myrouter.example.com Choose the size of the key modulus in the range of 360 to 2048 for your General Purpose Keys. Choosing a key modulus greater than 512 may take a few minutes. I read from the manual that the key pair will be used for SSH but just wonder does the command 'crypto key generate rsa' is necessary to enable SSH on ASA? I can access to my firewall via SSH but when I checked in the configuration on ASA firewall by 'show run', I didn't see this command by the way.



5. Encrypt a string by generating a public key file
6. Decrypting a string with the generated private key file、
7. Signing with a private key
8. Verifying the signature with the public key

9. Test function calls


10. Tool functions such as Base64 transcoding, string conversion

router(config)# hostname R1
R1(config)# ip domain-name ccie.com
–> To define a default domain name that the Cisco IOS software uses to complete unqualified host names

R1(config)# crypto key generate rsa
–> To generate RSA key pairs

The name for the keys will be: R1.ccie.com
Choose the size of the key modulus in the range of 360 to 2048 for your General purpose keys. Choosing a key modulus
greater than 512 may take a few minutes

How many bits in the modulus [512]: 1024
–> modulus : determines the strength of the key , the higher the modulus number the strong the key is
the higher the modulus number the more CPU cycles you are going to have to use encrypt and decrypt

R1(config)# username edaoud privilege 15 secret cisco
–> To establish a username-based authentication system

Man Crypto Key Generate Rsa Number

R1(config)# line vty 0 4
–> for telnet per default, there is five lines, 0 to 4

R1(config-line)# login local
–> To enable password checking at login

R1(config-line)# transport input ssh
–> To define protocol SSH to be used to connect to a specific line of the router

R1(config)# ip ssh version 2
–> Specify protocol version to be supported Can't generate cybersource transaction key on sandbox.

R1(config)# ip ssh time-out <0-120> ms
–> Specify SSH time-out interval

R1(config)# ip ssh authentication-retries <0-5>
–> Specify number of authentication retries

R1(config)# ip ssh maxstartups
–> Max concurrent session allowed

R2# ssh -l edaoud 10.1.12.1
–> Specifies the user ID to use when logging in on the remote networking device that is running the SSH server.

router# show ssh
%No SSHv2 server connections running.
%No SSHv1 server connections running.

router# sh ip ssh
SSH Disabled – version 1.99
%Please create RSA keys to enable SSH (and of atleast 768 bits for SSH v2).
Authentication timeout: 120 secs; Authentication retries: 3
Minimum expected Diffie Hellman key size : 1024 bits
IOS Keys in SECSH format(ssh-rsa, base64 encoded): NONE

router# show control-plan host open-ports
router# show tcp

Below Quote are taken from CCIE Routing and Switching Exam Certification Guide 4th Edition.

Using Secure Shell Protocol

Telnethas long been used to manage network devices; however, Telnet traffic is sent in clear text. Anyone
able to sniff that traffic would see your password and any other information sent during the Telnet
session. Secure Shell (SSH) is a much more secure way to manage your routers and switches. It
is a client/server protocol that encrypts the traffic in and out through the vty ports.

Cisco routers and switches can act as SSH clients by default, but must be configured to be SSH
servers. That is, they can use SSH when connecting to another device, but require configuration
before allowing devices to connect via SSH to them. They also require some method of
authenticating the client. This can be either a local username and password, or authentication with
a AAA server (AAA is detailed in the next section).

There are two versions of SSH. SSH Version 2 is an IETF standard that is more secure than version
1. Version 1 is more vulnerable to man-in-the-middle attacks, for instance. Cisco devices support
both types of connections, but you can specify which version to use.
Telnet is enabled by default, but configuring even a basic SSH server requires several steps:
1. Ensure that your IOS supports SSH. You need a K9 image for this.
2. Configure a host name, unless this was done previously.
3. Configure a domain name, unless this was done previously.
4. Configure a client authentication method.
5. Tell the router or switch to generate the Rivest, Shamir, and Adelman (RSA) keys that will be
used to encrypt the session.
6. Specify the SSH version, if you want to use version 2.
7. Disable Telnet on the VTY lines.
8. Enable SSH on the VTY lines.

Example 18-4 shows a router being configured to act as an SSH server.

Cisco Switch Can't Generate Crypto Key Rsa

Example 18-4 SSH Configuration
router(config)# hostname R3
R3(config)# ip domain-name CCIE2B
R3(config)# username cisco password Cisco
R3(config)# crypto key generate rsa
The name for the keys will be: R3.CCIE2B
Choose the size of the key modulus in the range of 360 to 2048 for your
General Purpose Keys. Choosing a key modulus greater than 512 may take
a few minutes.
How many bits in the modulus [512]: 1024
% Generating 1024 bit RSA keys …[OK]
R3(config)#
*May 22 02:06:51.923: %SSH-5-ENABLED: SSH 1.99 has been enabled
R3(config)# ip ssh version 2
!
R3(config)# line vty 0 4
R3(config-line)# transport input none
R3(config-line)# transport input ssh
R3(config-line)#^Z
!
R3# show ip ssh
SSH Enabled- version 2.0
Authentication timeout: 120 secs; Authentication retries: 3