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                    HOW TO BUILD THE KEYENROLL TOOL (for windows)
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1. Please make sure openssl is installed and OPENSSL_HOME is defined to your own openssl dir
   If you haven't installed openssl, please reference to "HOW TO BUILD THE OPENSSL LIB".
2. Suppose your EDK2 folder is <Work>.
3. Copy the KeyEnroll folder to <Work>\BaseTools\Source\C.
4. Open a command prompt(VS2015/VS2013/VS2008), change the current directory to <Work>\edk2.
5. Run "edksetup --nt32".
6. Change the current directory to <Work>\edk2\BaseTools\Source\C\Common, and run "nmake".
7. Change the current directory to <Work>\edk2\BaseTools\Source\C\KeyEnroll, and run "nmake".
8. Then, KeyEnroll.exe will be generated in <Work>\BaseTools\Bin\Win32.


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                    HOW TO BUILD THE OPENSSL LIB (for windows)
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1. Download OpenSSL source code. (for example openssl-1.0.1u)
2. Unzip the source code to <OpenSSLDir>.
3. Open a command prompt(VS2015/VS2013/VS2008), change the current directory to <OpenSSLDir>.
4. Run "perl Configure VC-WIN32 --prefix=<INSTALL_DIR>", <INSTALL_DIR> will be set as OPENSSL_HOME.
5. Run "vcvars32.bat".
5. Run "ms\do_ms.bat".
6. Run "nmake -f ms\nt.mak install", The "bin","include","lib" and "ssl" folder will copy to <INSTALL_DIR> folder.

The above steps just verified in openssl-1.0.1u, if your OpenSSL version is differnt from 1.0.1u,
Please reference to the INSTALL file in the specified version.