keytool in windows does not work to get hash for Facebook

You really have to define the path of OpenSSL instead of "PATH_TO_OPENSSL_LIBRARY\bin\openssl" , for this you must install it previously, you can download it from this < a href="https://code.google.com/archive/p/openssl-for-windows/downloads"> own link for windows .

When you have it installed you can define it in your command, as an example I have it installed in C:\Data\OpenSSL which is where openssl.exe is found:

therefore I define the full path of OpenSSL when calling my command:

keytool -exportcert -alias androiddebugkey -keystore C:\Users\Jorgesys\.android\debug.keystore | openssl sha1 -binary | C:\Data\OpenSSL\openssl
base64

You can also register the path where openssl.exe is found in the environment variables

and simply define the executable when executing the command:

keytool -exportcert -alias androiddebugkey -keystore C:\Users\Jorgesys\.android\debug.keystore | openssl sha1 -binary | openssl
    base64

Remember to also define the correct path where your debug keystore is located, which is the file debug.keystore , in windows it is regularly found in this route:

C:\Users\<NOMBRE USUARIO>\.android\debug.keystore