private static String toHexString(byte[] data) {
StringBuilder buffer = StringUtils.stringBuilder();
for (int i = 0; i < data.length; i++) {
buffer.append(Integer.toHexString((data[i] & 0xf0) >>> 4));
buffer.append(Integer.toHexString(data[i] & 0x0f));
}
return buffer.toString();
}
private static void appendBase16(StringBuilder buf, byte[] bytes) {
int base = 16;
for (byte b : bytes) {
int bi = 0xff & b;
int c = '0' + (bi / base) % base;
if (c > '9') c = 'a' + (c - '0' - 10);
buf.append((char) c);
c = '0' + bi % base;
if (c > '9') c = 'a' + (c - '0' - 10);
buf.append((char) c);
}
}
private byte[] dataDigest(StringBuilder sb, String digestUri, MessageDigest md) {
sb.append(methodName).append(':').append(digestUri);
if ("auth-int".equals(qop)) {
sb.append(':').append(EMPTY_ENTITY_MD5);
} else if (qop != null && !qop.equals("auth")) {
throw new UnsupportedOperationException("Digest qop not supported: " + qop);
}
return md5FromRecycledStringBuilder(sb, md);
}
private byte[] secretDigest(StringBuilder sb, MessageDigest md) {
sb.append(principal).append(':').append(realmName).append(':').append(password);
byte[] ha1 = md5FromRecycledStringBuilder(sb, md);
if (algorithm == null || algorithm.equals("MD5")) {
return ha1;
} else if ("MD5-sess".equals(algorithm)) {
appendBase16(sb, ha1);
sb.append(':').append(nonce).append(':').append(cnonce);
return md5FromRecycledStringBuilder(sb, md);
}
throw new UnsupportedOperationException("Digest algorithm not supported: " + algorithm);
}
private void appendDataBase(StringBuilder sb) {
sb.append(':').append(nonce).append(':');
if ("auth".equals(qop) || "auth-int".equals(qop)) {
sb.append(nc).append(':').append(cnonce).append(':').append(qop).append(':');
}
}