Method getCAStore

app/src/main/java/eu/faircode/email/SmimeHelper.java:101–122

(Context context)

    }

    static KeyStore getCAStore(Context context) throws KeyStoreException, CertificateException, IOException, NoSuchAlgorithmException {
        KeyStore aks = KeyStore.getInstance("AndroidCAStore");
        aks.load(null, null);

        KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());
        ks.load(null, null);

        Enumeration<String> aliases = aks.aliases();
        while (aliases.hasMoreElements()) {
            String alias = aliases.nextElement();
            if (aks.isCertificateEntry(alias))
                ks.setCertificateEntry(alias, aks.getCertificate(alias));
        }

        int idx = 1;
        for (X509Certificate ca : SmimeHelper.readCACertificates(context)) {
            String alias = "asset:" + idx++ + ":" + ca.getSubjectDN().getName();
            ks.setCertificateEntry(alias, ca);
        }

        return ks;
    }
}