private final boolean checkHashed(String entry, String hostname) {
if (entry.startsWith("|1|") == false) return false;
int delim_idx = entry.indexOf('|', 3);
if (delim_idx == -1) return false;
String salt_base64 = entry.substring(3, delim_idx);
String hash_base64 = entry.substring(delim_idx + 1);
byte[] salt = null;
byte[] hash = null;
try {
salt = Base64.decode(salt_base64.toCharArray());
hash = Base64.decode(hash_base64.toCharArray());
} catch (IOException e) {
return false;
}
SHA1 sha1 = new SHA1();
if (salt.length != sha1.getDigestLength()) return false;
byte[] dig = hmacSha1Hash(salt, hostname);
for (int i = 0; i < dig.length; i++) if (dig[i] != hash[i]) return false;
return true;
}
private void initialize(char[] knownHostsData) throws IOException {
BufferedReader br = new BufferedReader(new CharArrayReader(knownHostsData));
while (true) {
String line = br.readLine();
if (line == null) break;
line = line.trim();
if (line.startsWith("#")) continue;
String[] arr = line.split(" ");
if (arr.length >= 3) {
if ((arr[1].compareTo("ssh-rsa") == 0) || (arr[1].compareTo("ssh-dss") == 0)) {
String[] hostnames = arr[0].split(",");
byte[] msg = Base64.decode(arr[2].toCharArray());
addHostkey(hostnames, arr[1], msg);
}
}
}
}
public static String unmask(String secret) throws PhrescoException {
if (StringUtils.isEmpty(secret)) {
return StringUtils.EMPTY;
}
try {
return new String(Base64.decode(secret.toCharArray()), "UTF-8");
} catch (IOException e) {
throw new PhrescoException(e);
}
}
protected void check() throws IOException, ServletException {
try {
String v = request.getParameter("value");
if (!allowWhitespace) {
if (v.indexOf(' ') >= 0 || v.indexOf('\n') >= 0) {
fail();
return;
}
}
v = v.trim();
if (!allowEmpty && v.length() == 0) {
fail();
return;
}
com.trilead.ssh2.crypto.Base64.decode(v.toCharArray());
ok();
} catch (IOException e) {
fail();
}
}
