Https Connection Android

Question

I am doing a https post and I\'m getting an exception of ssl exception Not trusted server certificate. If i do normal http it is working perfectly fine. Do I have to accept

Answer 1

Sources that helped me get to work with my self signed certificate on my AWS Apache server and connect with HttpsURLConnection from android device:

SSL on aws instance - amazon tutorial on ssl
Android Security with HTTPS and SSL - creating your own trust manager on client for accepting your certificate
Creating self signed certificate - easy script for creating your certificates

Then I did the following:

1. Made sure the server supports https (sudo yum install -y mod24_ssl)
2. Put this script in a file create_my_certs.sh:

#!/bin/bash
FQDN=$1

# make directories to work from
mkdir -p server/ client/ all/

# Create your very own Root Certificate Authority
openssl genrsa \
  -out all/my-private-root-ca.privkey.pem \
  2048

# Self-sign your Root Certificate Authority
# Since this is private, the details can be as bogus as you like
openssl req \
  -x509 \
  -new \
  -nodes \
  -key all/my-private-root-ca.privkey.pem \
  -days 1024 \
  -out all/my-private-root-ca.cert.pem \
  -subj "/C=US/ST=Utah/L=Provo/O=ACME Signing Authority Inc/CN=example.com"

# Create a Device Certificate for each domain,
# such as example.com, *.example.com, awesome.example.com
# NOTE: You MUST match CN to the domain name or ip address you want to use
openssl genrsa \
  -out all/privkey.pem \
  2048

# Create a request from your Device, which your Root CA will sign
openssl req -new \
  -key all/privkey.pem \
  -out all/csr.pem \
  -subj "/C=US/ST=Utah/L=Provo/O=ACME Tech Inc/CN=${FQDN}"

# Sign the request from Device with your Root CA
openssl x509 \
  -req -in all/csr.pem \
  -CA all/my-private-root-ca.cert.pem \
  -CAkey all/my-private-root-ca.privkey.pem \
  -CAcreateserial \
  -out all/cert.pem \
  -days 500

# Put things in their proper place
rsync -a all/{privkey,cert}.pem server/
cat all/cert.pem > server/fullchain.pem         # we have no intermediates in this case
rsync -a all/my-private-root-ca.cert.pem server/
rsync -a all/my-private-root-ca.cert.pem client/

3. Run bash create_my_certs.sh yourdomain.com

4. Place the certificates in their proper place on the server (you can find configuration in /etc/httpd/conf.d/ssl.conf). All these should be set:
   SSLCertificateFile
   SSLCertificateKeyFile
   SSLCertificateChainFile
   SSLCACertificateFile

5. Restart httpd using sudo service httpd restart and make sure httpd started:
   Stopping httpd: [ OK ]
   Starting httpd: [ OK ]

6. Copy my-private-root-ca.cert to your android project assets folder

7. Create your trust manager:
   

   SSLContext SSLContext;

   CertificateFactory cf = CertificateFactory.getInstance("X.509"); InputStream caInput = context.getAssets().open("my-private-root-ca.cert.pem"); Certificate ca; try { ca = cf.generateCertificate(caInput); } finally { caInput.close(); }

     // Create a KeyStore containing our trusted CAs
     String keyStoreType = KeyStore.getDefaultType();
     KeyStore keyStore = KeyStore.getInstance(keyStoreType);
     keyStore.load(null, null);
     keyStore.setCertificateEntry("ca", ca);
   
     // Create a TrustManager that trusts the CAs in our KeyStore
     String tmfAlgorithm = TrustManagerFactory.getDefaultAlgorithm();
     TrustManagerFactory tmf = TrustManagerFactory.getInstance(tmfAlgorithm);
     tmf.init(keyStore);
   
     // Create an SSLContext that uses our TrustManager
     SSLContext = SSLContext.getInstance("TLS");
     SSSLContext.init(null, tmf.getTrustManagers(), null);
   

8. And make the connection using HttpsURLConnection:

   HttpsURLConnection connection = (HttpsURLConnection) url.openConnection(); connection.setSSLSocketFactory(SSLContext.getSocketFactory());

9. Thats it, try your https connection.