Converting a Microsoft PKCS12 Certificate to PEM format
You want to know how to convert a Microsoft PKCS12 Certificate to PEM format
To convert a certificate from PKCS12 format to PEM format using OpenSSL via Cygwin on Microsoft Windows:
Note: You will be prompted for a password to decrypt the PKCS12 file, and for a pass phrase to encrypt the private key on output.
Cygwin can be downloaded from http://www.cygwin.com/ . OpenSSL is a package within Cygwin. Within Cygwin, OpenSSL is a part of the "Net" category of applications and should be a part of the default install.