Crypt::OpenSSL::RSA - RSA encoding and decoding, using the openSSL libraries

1. Openssl Generate Keypair
2. Use Openssl To Generate Key Pair
3. Openssl Generate Pem Key
4. Openssl Generate Pkcs8 Rsa Key Pair Parameters To Support Ssh Version 2
5. Openssl Generate Pkcs8 Rsa Key Pair Number
6. Openssl Generate Rsa Public Private Key Pair
7. Rsa

Crypt::OpenSSL::RSA provides the ability to RSA encrypt strings which are somewhat shorter than the block size of a key. It also allows for decryption, signatures and signature verification.

Since OpenSSL is a collection of modules we specify genpkey to generate a private key. The -algorithm option specifies which algorithm we want to use to generate the key (RSA in this case), -out specifies the name of the output file, and -pkeyopt allows us to set the value for specific key options. In this case the length of the RSA key in bits. Instead of using Amazon EC2 to create your key pair, you can create an RSA key pair using a third-party tool and then import the public key to Amazon EC2. For example, you can use. $ openssl pkcs8 -in pathtoprivatekey-inform PEM -outform DER -topk8 -nocrypt.

NOTE: Many of the methods in this package can croak, so use eval, or Error.pm's try/catch mechanism to capture errors. Also, while some methods from earlier versions of this package return true on success, this (never documented) behavior is no longer the case.

Create a new Crypt::OpenSSL::RSA object by loading a public key in from a string containing Base64/DER-encoding of either the PKCS1 or X.509 representation of the key. The string should include the -----BEGIN..----- and -----END..----- lines.

The padding is set to PKCS1_OAEP, but can be changed with the use_xxx_padding methods.

Create a new Crypt::OpenSSL::RSA object by loading a private key in from an string containing the Base64/DER encoding of the PKCS1 representation of the key. The string should include the -----BEGIN..----- and -----END..----- lines. The padding is set to PKCS1_OAEP, but can be changed with use_xxx_padding.

You can generate the RSA keys with following command. Set the login-to-local, & password to 7.sw1 ( config)#line vty 0 4sw1 ( config-line)#transport input sshsw1( config -line)#login localsw1(config- line)#password 7sw1(config- line ) #exit Create the username password for SSH access from PCIf you do not have a username for SSH access you need to create a username. Setup the Line VTY configurationsFor the configuration of SSH on cisco switch you need the following line vty configurations, and input transport is required to set to SSH. SW1 ( config)# crypto key generate rsaHow many bits in the modulus 512: 1024% Generating 1024 bit RSA keys, keys will be non-exportableOKSet the size of key to 1024 bits.If your Cisco Switch is running an older version of Cisco IOS image, then it is extremely recommended that you upgrade to latest Cisco IOS. You can do it with this simple command:Sw1# config tsw1 (config ) # username w7cloud password ciscoMake sure the password encryption services is enabled on your switch, this service will encrypt your password, & when you do “sh run”, you’ll see only the encrypted password, not clear text password.SW1# service password-encryption Verify SSH access from HostOnce you done with the above configurations you can test all these configuration by creating a SSH connection from Host. Crypto key generate rsa packet tracer.

Create a new Crypt::OpenSSL::RSA object by constructing a private/public key pair. The first (mandatory) argument is the key size, while the second optional argument specifies the public exponent (the default public exponent is 65537). The padding is set to PKCS1_OAEP, but can be changed with use_xxx_padding methods.

Given Crypt::OpenSSL::Bignum objects for n, e, and optionally d, p, and q, where p and q are the prime factors of n, e is the public exponent and d is the private exponent, create a new Crypt::OpenSSL::RSA object using these values. If p and q are provided and d is undef, d is computed. Note that while p and q are not necessary for a private key, their presence will speed up computation.

Import a random seed from Crypt::OpenSSL::Random, since the OpenSSL libraries won't allow sharing of random structures across perl XS modules.

Clean up after ourselves. In particular, erase and free the memory occupied by the RSA key structure.

Return the Base64/DER-encoded PKCS1 representation of the public key. This string has header and footer lines:

Return the Base64/DER-encoded representation of the 'subject public key', suitable for use in X509 certificates. This string has header and footer lines:

and is the format that is produced by running openssl rsa -pubout.

Openssl Generate Keypair

Return the Base64/DER-encoded PKCS1 representation of the private key. This string has header and footer lines:

Encrypt a binary 'string' using the public (portion of the) key.

Use Openssl To Generate Key Pair

Decrypt a binary 'string'. Croaks if the key is public only.

Encrypt a binary 'string' using the private key. Croaks if the key is public only.

Decrypt a binary 'string' using the public (portion of the) key.

Sign a string using the secret (portion of the) key.

Check the signature on a text.

Use raw RSA encryption. This mode should only be used to implement cryptographically sound padding modes in the application code. Encrypting user data directly with RSA is insecure.

Use PKCS #1 v1.5 padding. This currently is the most widely used mode of padding.

Use EME-OAEP padding as defined in PKCS #1 v2.0 with SHA-1, MGF1 and an empty encoding parameter. This mode of padding is recommended for all new applications. It is the default mode used by Crypt::OpenSSL::RSA.

Use PKCS #1 v1.5 padding with an SSL-specific modification that denotes that the server is SSL3 capable.

Use the RFC 1321 MD5 hashing algorithm by Ron Rivest when signing and verifying messages.

Note that this is considered insecure.

Use the RFC 3174 Secure Hashing Algorithm (FIPS 180-1) when signing and verifying messages. This is the default, when use_sha256_hash is not available.

Openssl Generate Pem Key

These FIPS 180-2 hash algorithms, for use when signing and verifying messages, are only available with newer openssl versions (>= 0.9.8).

use_sha256_hash is the default hash mode when available.

Dobbertin, Bosselaers and Preneel's RIPEMD hashing algorithm when signing and verifying messages.

Vincent Rijmen und Paulo S. L. M. Barreto ISO/IEC 10118-3:2004 WHIRLPOOL hashing algorithm when signing and verifying messages.

Returns the size, in bytes, of the key. All encrypted text will be of this size, and depending on the padding mode used, the length of the text to be encrypted should be:

at most 42 bytes less than this size.

at most 11 bytes less than this size.

exactly this size.

This function validates the RSA key, returning a true value if the key is valid, and a false value otherwise. Croaks if the key is public only.

Return Crypt::OpenSSL::Bignum objects representing the values of n, e, d, p, q, d mod (p-1), d mod (q-1), and 1/q mod p, where p and q are the prime factors of n, e is the public exponent and d is the private exponent. Some of these values may return as undef; only n and e will be defined for a public key. The Crypt::OpenSSL::Bignum module must be installed for this to work.

Openssl Generate Pkcs8 Rsa Key Pair Parameters To Support Ssh Version 2

Return true if this is a private key, and false if it is private only.

There is a small memory leak when generating new keys of more than 512 bits.

Ian Robertson, iroberts@cpan.org. For support, please email perl-openssl-users@lists.sourceforge.net.

Copyright (c) 2001-2011 Ian Robertson. Crypt::OpenSSL::RSA is free software; you may redistribute it and/or modify it under the same terms as Perl itself.

Openssl Generate Pkcs8 Rsa Key Pair Number

perl(1), Crypt::OpenSSL::Random(3), Crypt::OpenSSL::Bignum(3), rsa(3), RSA_new(3), RSA_public_encrypt(3), RSA_size(3), RSA_generate_key(3), RSA_check_key(3)

Openssl Generate Rsa Public Private Key Pair

To install Crypt::OpenSSL::RSA, simply copy and paste either of the commands in to your terminal

Rsa

For more information on module installation please visit the detailed CPAN module installation guide.