Convert PHP RSA PublicKey into Android PublicKey

Question

I am working on a client server based application.

Where I get PublicKey in this format

Answer 1

There is a project called "bouncycastle" we use it on j2me but it woll work on android too. it can be used to handle openssl certificates.

bouncycastle.org

Java KeyStore implementation:

import java.security.cert.Certificate import java.security.KeyStore

and readme a LOT because openssl keys are not directly supported by java which is bringing their own mechanisms.

Java example for KeyStore stuff:

byte[] certData = ...       
/* create KeyStore */
KeyStore ks = KeyStore.getInstance("JKS", "SUN");
/* load key store (initialization */
ks.load(null, null);
/* create CertificateFactory */
CertificateFactory cf = CertificateFactory.getInstance("X509");
/* create certificate from input stream */
Certificate cert;
/* provide cert data */
ByteArrayInputStream in = new ByteArrayInputStream(makeCert(certData));



private static byte[] makeCert(byte[] data) {
    String headline = "-----BEGIN CERTIFICATE-----";
    String footline = "-----END CERTIFICATE-----";

    String certStr = headline;
    for (int i = 0; i < data.length; i++) {
        if (i%64 == 0) {
            certStr += "\n";
        }
        certStr += (char)data[i];
    }
    if ((data.length-1)%64 != 0) {
        certStr += "\n";
    }
    certStr += footline;
    return certStr.getBytes();
}