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Old November 10th, 2005, 09:42 PM
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OpenSSL - Installation on Windows - Tutorial by Herong

For other tutorials on OpenSSL, see

OpenSSL - Installation on Windows

What is OpenSSL?

OpenSSL is a cryptography toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) network protocols and related cryptography standards required by them.

The openssl program is a command line tool for using the various cryptography functions of OpenSSL's crypto library from the shell. It can be used for:

  • Creation of RSA, DH and DSA key parameters
    Creation of X.509 certificates, CSRs and CRLs
    Calculation of Message Digests
    Encryption and Decryption with Ciphers
    SSL/TLS Client and Server Tests
    Handling of S/MIME signed or encrypted mail

Installing OpenSSL on Windows

OpenSSL is officially distributed in C source code format. This is not a problem for Unix systems where C compiler is always available. But if you have a Windows system, you will have a hard time to install OpenSSL in C source code format. What you should do is to find a pre-compiled binary version for Windows. Here is my sugge I installed OpenSSL on my Windows system:

1. Go to, and download the "Setup" version of "Binaries", openssl-0.9.7c-bin.exe.

2. Double click on openssl-0.9.7c-bin.exe to install OpenSSL to \local\gnuwin32 directory.

3. Go back to the same page, download the "Setup" version of "Documentation", and install it to the same directory.

4. Open command line window, and try the following command:
>\local\gnuwin32\bin\openssl -help
openssl:Error: '-help' is an invalid command.

Standard commands
asn1parse      ca             ciphers        crl            crl2pkcs7
dgst           dh             dhparam        dsa            dsaparam
enc            engine         errstr         gendh          gendsa
genrsa         nseq           ocsp           passwd         pkcs12
pkcs7          pkcs8          rand           req            rsa
rsautl         s_client       s_server       s_time         sess_id
smime          speed          spkac          verify         version

If you see the list of commands printed by OpenSSL, you know that your installation is done correctly.

For other tutorials on OpenSSL, see
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