Openssl is not recognized as an internal or external command

Question

I wish to generate an application signature for my app which will later be integrated with Facebook. In one of Facebook\'s tutorials, I found this command:

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Answer 1

Downloads and Unzip

You can download openssl for windows 32 and 64 bit from the respective links below:

https://code.google.com/archive/p/openssl-for-windows/downloads

OpenSSL for 64 Bits OpenSSL for 32 Bits

keytool -exportcert -alias androiddebugkey -keystore %HOMEPATH%\.android\debug.keystore | **"C:\Users\keshav.gera\openssl-0.9.8k_X64\bin**\openssl.exe" sha1 -binary | **"C:\Users\keshav.gera\openssl-0.9.8k_X64\bin**\openssl.exe" base64

Important change our path Here as well as install open ssl in your system

It's Working No Doubt

C:\Users\keshav.gera>keytool -exportcert -alias androiddebugkey -keystore %HOMEPATH%\.android\debug.keystore | "C:\Users\keshav.gera\openssl-0.9.8k_X64\bin\openssl.exe" sha1 -binary | "C:\Users\keshav.gera\openssl-0.9.8k_X64\bin\openssl.exe" base64

Enter keystore password: android

**ZrRtxw36xWNYL+h3aJdcCeQQxi0=**

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using Manually through Coding

import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.Signature;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;


private void PrintHashKey() {

        try {
            PackageInfo info = getPackageManager().getPackageInfo("**com.keshav.patanjalidemo  Your Package Name Here**", PackageManager.GET_SIGNATURES);
            for (Signature signature : info.signatures) {
                MessageDigest md = MessageDigest.getInstance("SHA");        
                md.update(signature.toByteArray());
                Log.d("KeyHash:", Base64.encodeToString(md.digest(), Base64.DEFAULT));
            }
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }

    }