Examples with KeyRing net.i2p.crypto.KeyRing used on opensource projects

Example 1 with KeyRing

use of net.i2p.crypto.KeyRing in project i2p.i2p by i2p.

the class BlocklistEntries method verify.

public synchronized boolean verify(I2PAppContext ctx) {
    if (verified)
        return true;
    if (signer == null || sig == null || supdated == null)
        return false;
    if (updated > ctx.clock().now() + MAX_FUTURE)
        return false;
    Log log = ctx.logManager().getLog(BlocklistEntries.class);
    String[] ss = DataHelper.split(sig, ":", 2);
    if (ss.length != 2) {
        log.error("blocklist feed bad sig: " + sig);
        return false;
    }
    SigType type = SigType.parseSigType(ss[0]);
    if (type == null) {
        log.error("blocklist feed bad sig: " + sig);
        return false;
    }
    if (!type.isAvailable()) {
        log.error("blocklist feed sigtype unavailable: " + sig);
        return false;
    }
    byte[] bsig = Base64.decode(ss[1]);
    if (bsig == null) {
        log.error("blocklist feed bad sig: " + sig);
        return false;
    }
    Signature ssig;
    try {
        ssig = new Signature(type, bsig);
    } catch (IllegalArgumentException iae) {
        log.error("blocklist feed bad sig: " + sig);
        return false;
    }
    // look in both install dir and config dir for the signer cert
    KeyRing ring = new DirKeyRing(new File(ctx.getBaseDir(), "certificates"));
    PublicKey pubkey;
    try {
        pubkey = ring.getKey(signer, CONTENT_ROUTER, type);
    } catch (IOException ioe) {
        log.error("blocklist feed error", ioe);
        return false;
    } catch (GeneralSecurityException gse) {
        log.error("blocklist feed error", gse);
        return false;
    }
    if (pubkey == null) {
        boolean diff = true;
        try {
            diff = !ctx.getBaseDir().getCanonicalPath().equals(ctx.getConfigDir().getCanonicalPath());
        } catch (IOException ioe) {
        }
        if (diff) {
            ring = new DirKeyRing(new File(ctx.getConfigDir(), "certificates"));
            try {
                pubkey = ring.getKey(signer, CONTENT_ROUTER, type);
            } catch (IOException ioe) {
                log.error("blocklist feed error", ioe);
                return false;
            } catch (GeneralSecurityException gse) {
                log.error("blocklist feed error", gse);
                return false;
            }
        }
        if (pubkey == null) {
            log.error("unknown signer for blocklist feed: " + signer);
            return false;
        }
    }
    SigningPublicKey spubkey;
    try {
        spubkey = SigUtil.fromJavaKey(pubkey, type);
    } catch (GeneralSecurityException gse) {
        log.error("blocklist feed bad sig: " + sig, gse);
        return false;
    }
    StringBuilder buf = new StringBuilder(256);
    buf.append(supdated).append('\n');
    for (String s : entries) {
        buf.append(s).append('\n');
    }
    for (String s : removes) {
        buf.append('!').append(s).append('\n');
    }
    byte[] data = DataHelper.getUTF8(buf.toString());
    boolean rv = ctx.dsa().verifySignature(ssig, data, spubkey);
    if (rv)
        log.info("blocklist feed sig ok");
    else
        log.error("blocklist feed sig verify fail: " + signer);
    verified = rv;
    return rv;
}