Shulou(Shulou.com)06/01 Report--

Openssl command line how to carry out RSA encryption and decryption, I believe that many inexperienced people do not know what to do, so this paper summarizes the causes of the problem and solutions, through this article I hope you can solve this problem.

Openssl is a powerful toolkit that integrates many cryptographic algorithms and utilities. We can not only use the command console tool to generate keys and certificates to encrypt and decrypt files, but also use the API interface to encrypt the transmission information in the code.

RSA is an asymmetric encryption algorithm. To put it simply, the asymmetric encryption algorithm means that a file needs to be encrypted and decrypted with two keys, one for encryption, the other for decryption, and the other for private key. Certificates can be used to authorize the use of public keys.

Today, I have studied the rsa encryption of openssl, which mainly involves the use of public key and key to encrypt and decrypt files, but does not involve the operation of certificates.

First of all, introduce the simple use of the openssl tool under the command console:

■ generates a key:

Openssl genrsa-out test.key 1024

Here-out specifies that the file is generated. It is important to note that this file contains both the public key and the key, which means that the file can be used for both encryption and decryption. The next 1024 is the length of the generated key.

■ openssl can extract the public key from this file:

Openssl rsa-in test.key-pubout-out test_pub.key

-in specifies the input file, and-out specifies the name of the file to extract and generate the public key. At this point, we have a public key and a private key (including the public key). You can now encrypt the file with the public key.

■ I create a hello text file in the directory and encrypt the file with the previously generated public key:

Openssl rsautl-encrypt-in hello-inkey test_pub.key-pubin-out hello.en

-in specifies the file to be encrypted,-inkey specifies the key,-pubin indicates that it is encrypted with a pure public key file, and-out is the encrypted file.

■ decrypts the file:

Openssl rsautl-decrypt-in hello.en-inkey test.key-out hello.de

-in specifies the encrypted file,-inkey specifies the private key file, and-out is the decrypted file.

At this point, the process of encryption and decryption ends.

After reading the above, have you mastered how to encrypt and decrypt RSA on the openssl command line? If you want to learn more skills or want to know more about it, you are welcome to follow the industry information channel, thank you for reading!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.