PKI Tutorials - Herong's Tutorial Examples - v2.32, by Herong Yang
OpenSSL Configuration Errors
This section provides a tutorial example on how to resolve OpenSSL module configuration errors. 'Unable to find the wrapper https' means that the OpenSSL module is not configured correctly.
To help you troubleshooting configuration errors, I also did some tests with some incorrect configurations.
1. Missing extension=php_openssl.dll in php.ini file.
Edit php.ini file again and comment out the extension=php_openssl.dll line:
... extension_dir = "ext" ... ;extension=php_openssl.dll ...
Run my test script again:
herong> \local\php\php OpenSSL_HTTPS_file_get_contents.php \ https://login.yahoo.com PHP Warning: file_get_contents(): Unable to find the wrapper "https" - did you forget to enable it when you configured PHP? in OpenSSL_HTTPS_file_get_contents.php on line 7 PHP Warning: file_get_contents(https://login.yahoo.com): failed to open stream: Invalid argument in OpenSSL_HTTPS_file_get_contents.php on line 7
Execution failed because the OpenSSL module is turned off.
2. Failed to load php_openssl.dll.
Edit php.ini file again and comment out the extension_dir = "ext" line:
... ;extension_dir = "ext" ... extension=php_openssl.dll ...
Run my test script again:
herong> \local\php\php OpenSSL_HTTPS_file_get_contents.php \ https://login.yahoo.com PHP Warning: PHP Startup: Unable to load dynamic library 'C:\php\php_openssl.dll' - The specified module could not be found. in Unknown on line 0 ...
Execution failed because the PHP engine is trying to load php_openssl.dll from the default location \php. The correct location is in the "ext" sub directory of the PHP home directory.
After finishing these tests, don't forget to undo changes you have made in the php.ini file.
Table of Contents
Introduction of PKI (Public Key Infrastructure)
Introduction of HTTPS (Hypertext Transfer Protocol Secure)
Using HTTPS with Google Chrome
Using HTTPS with Mozilla Firefox
HTTPS with IE (Internet Explorer)
Android and Server Certificate
Windows Certificate Stores and Console
RDP (Remote Desktop Protocol) and Server Certificate
macOS Certificate Stores and Keychain Access
Perl Scripts Communicating with HTTPS Servers
►PHP Scripts Communicating with HTTPS Servers
Configuring PHP OpenSSL on Windows
Testing OpenSSL with file_get_contents()
SSL Context Options for OpenSSL
Asking OpenSSL to Verify Server's Certificate
OpenSSL Failing to Verify Server's Certificate
Multiple CA Certificates in a Single File
Testing OpenSSL with fsockopen()
Adding CA Certificates for the PHP Engine
Testing OpenSSL with stream_socket_client()
Java Programs Communicating with HTTPS Servers
.NET Programs Communicating with HTTPS Servers
CAcert.org - Root CA Offering Free Certificates
PKI CA Administration - Issuing Certificates
Comodo Free Personal Certificate
Digital Signature - Microsoft Word
Digital Signature - OpenOffice.org 3