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POHow to read Cipher private Key with bouncycastle in android?
 

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  1. POHow to read Cipher private Key with bouncycastle in android?
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    <p>I have a private key that encrypted with <code>AES256</code> and key <code>salam</code>.</p> <p>I want to decrypt it and read the private key in that.</p> <p>I Write Below Code :</p> <pre><code>public CertReader(String password, Context context) { mContext = context; pf = new Password(password.toCharArray()); InputStream Certin = mContext.getResources().openRawResource( R.raw.kxx_2048_sign); PEMReader pemRd = openPEMResource(Certin, pf); Object o = null; try { o = pemRd.readObject(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } X509Certificate x509 = ((X509Certificate) o); logging.l(x509.toString()); Certin = mContext.getResources().openRawResource( R.raw.kxx_2048); pemRd = openPEMResource(Certin, pf); try { o = pemRd.readObject(); //My Program exit with error here. } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } // KeyPair key = ((KeyPair)o); // logging.l(key.toString()); } private PEMReader openPEMResource(InputStream Certin, PasswordFinder pGet) { Reader fRd = new BufferedReader(new InputStreamReader(Certin)); return new PEMReader(fRd, pGet); } private static class Password implements PasswordFinder { char[] password; Password(char[] word) { this.password = word; } public char[] getPassword() { return password; } } </code></pre> <p><code>kxx_2048_sign.crt</code> is a Certificate and there is no problem with it because it is not encrypt.</p> <p>but <code>kxx_2048.key</code> is encrypted with <code>AES256</code> and in <code>o = pemRd.readObject();</code> i got below error :</p> <pre><code> java.lang.IllegalAccessError: tried to access class org.bouncycastle.openssl.PEMUtilities from class org.bouncycastle.openssl.PEMReader$KeyPairParser </code></pre> <p>key start with this:</p> <pre><code>-----BEGIN RSA PRIVATE KEY----- Proc-Type: 4,ENCRYPTED DEK-Info: AES-256-CBC,5C76FCD87..... </code></pre> <p>What is the problem?</p> <p>I checked it on PC and it worked Correct but in Android it does not work.</p>
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    1. USM.Movaffagh
    1. USM.Movaffagh
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    1. COHi, this is a wild guest but have you try providing AES256 as provider argument when you create a new PEMReader. If you look at the [Source](http://grepcode.com/file/repo1.maven.org/maven2/org.bouncycastle/bcprov-jdk16/1.46/org/bouncycastle/openssl/PEMReader.java#PEMReader) there's this line `keyBytes = PEMUtilities.crypt(false, provider, keyBytes, password, dekAlgName, iv);` the constructor will by default set the provider to 'BC' if you don't supply any. My guess is that line failing and somewhat related to the error due to the mismatch of the arguments. See if it make any changes. Cheers
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      1. POHow to read Cipher private Key with bouncycastle in android?
      1. USRaymond Lagonda
    2. COit seems IllegalAccessError is a bug. i searched google and found an answer : The Legion of the Bouncy Castle is part of the Android firmware, but not part of the SDK. You cannot reliably add your own implementation of the JAR. Either use the Castle through the javax.crypto APIs, or find another crypto library that you can use. i do not know what this mean!but i know it is awfully BAD! http://stackoverflow.com/questions/5816310/android-cyanogenmod-7-android-2-3-bouncycastle-encryption-libraries-illega
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      1. POHow to read Cipher private Key with bouncycastle in android?
      1. USM.Movaffagh
 

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