Example usage for org.bouncycastle.mail.smime SMIMEException SMIMEException

Introduction

In this page you can find the example usage for org.bouncycastle.mail.smime SMIMEException SMIMEException.

Prototype

public SMIMEException(String name) 

Source Link

Usage

From source file:mitm.common.tools.SMIME.java

License:Open Source License

private static void sign(MimeMessage source, KeyStore keyStore, String alias, String password,
        String digestAlgo, String outFile) throws Exception {
    if (StringUtils.isEmpty(alias)) {
        throw new MissingArgumentException("alias is missing.");
    }//w ww. j a v a  2s. c  om

    KeyStore.Entry entry = keyStore.getEntry(alias, new KeyStore.PasswordProtection(password.toCharArray()));

    if (!(entry instanceof KeyStore.PrivateKeyEntry)) {
        throw new KeyStoreException("Key is not a PrivateKeyEntry.");
    }

    KeyStore.PrivateKeyEntry privateKeyEntry = (KeyStore.PrivateKeyEntry) entry;

    X509Certificate certificate = (X509Certificate) privateKeyEntry.getCertificate();
    PrivateKey key = privateKeyEntry.getPrivateKey();

    if (certificate == null) {
        throw new KeyStoreException("Entry does not have a certificate.");
    }

    if (key == null) {
        throw new KeyStoreException("Entry does not have a private key.");
    }

    SMIMESigningAlgorithm signingAlgorithm;

    if (StringUtils.isNotEmpty(digestAlgo)) {
        signingAlgorithm = SMIMESigningAlgorithm.fromName(digestAlgo);

        if (signingAlgorithm == null) {
            throw new IllegalArgumentException(digestAlgo + " is not a valid digest.");
        }
    } else {
        signingAlgorithm = SMIMESigningAlgorithm.SHA1WITHRSA;
    }

    SMIMEBuilder builder = new SMIMEBuilderImpl(source);

    builder.addCertificates(certificate);
    builder.addSigner(key, certificate, signingAlgorithm);

    builder.sign(SMIMESignMode.CLEAR);

    MimeMessage signed = builder.buildMessage();

    if (signed == null) {
        throw new SMIMEException("Message could not be signed");
    }

    MailUtils.writeMessage(signed, new File(outFile));
}

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