![]() Verifying - enter des-ecb encryption password: password $ openssl enc -des-ecb -in plaintext1.in -out ciphertext1.binĮnter des-ecb encryption password: password Enter a password when prompted - OpenSSL will automatically convert it to a key appropriate for DES: Now lets encrypt using DES and ECB, creating an output file ciphertext1.bin. You can use the cipher names in either lowercase or uppercase. The lowercase seed is an alias for the actual cipher SEED-CBC, i.e. A list of supported ciphers can be found using: Symmetric key encryption is performed using the enc operation of OpenSSL. Lets encrypt some files using selected symmetric key (conventional) ciphers such as DES, 3DES and AES. The most common cryptographic operation is encryption. rw-r-r- 1 sgordon sgordon 267 Jul 31 13:32 plaintext3.in rwxr-xr-x 1 sgordon sgordon 513208 Jul 31 13:32 plaintext2.in /etc/legal - a short text file containing the Ubuntu legal notice./usr/bin/openssl - the binary for the program OpenSSL./usr/share/dict/words - a large text file containing a list of words, i.e.I have chosen the following three, and will rename them simply to plaintext1.in, plaintext2.in, plaintext3.in: You don't need to do this if you already have some files to encrypt. See my additional comments at the end of this article if you are using a similar version of OpenSSL.Īs input plaintext I will copy some files on Ubuntu Linux into my home directory. Update (): I just tested on a Apple iMac using OS X 10.8.4 and OpenSSL version 0.9.8x. In the past I have had problems with different versions of OpenSSL but for only for very specific operations. If you are using different versions, then it is still a very good chance that all the following commands will work. Lets first determine the current versions of Ubuntu, Linux and OpenSSL I am using: ![]() ![]() I used some of them to write the following notes. There are other websites that give an overview of OpenSSL operations, as well as programming with the API. So hopefully this article will make life easier for those getting started. Although it is good to read the man pages, in my (and others) experience, the man pages of OpenSSL can be very detailed, hard to follow, confusing and out of date. For example, the operation of symmetric key encryption is enc, which is described in man enc. You'll soon learn that each of the operations (or commands) have their own man pages. To start learning the details of OpenSSL, read the man page, i.e. This article aims to give a demonstration of some simple and common operations. OpenSSL is a program and library that supports many different cryptographic operations, including:Įach of the operations supported by OpenSSL have a variety of options, such as input/output files, algorithms, algorithm parameters and formats. Simple Introduction to using OpenSSL on Command Line ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |