/// <summary>
/// Generates digest HA2 value as per RFC 2617 subclause 3.2.2.3.
/// </summary>
/// <param name="method"></param>
/// <param name="url"></param>
/// <param name="entity_body"></param>
/// <returns></returns>
public static String GetDigestHA2(String method, String url, byte[] entity_body, String qop)
{
/* RFC 2617 - 3.2.2.3 A2
*
* If the "qop" directive's value is "auth" or is unspecified, then A2
* is:
* A2 = Method ":" digest-url-value
*
* If the "qop" value is "auth-int", then A2 is:
* A2 = Method ":" digest-url-value ":" H(entity-body)
*/
String A2 = String.Empty;
if (String.IsNullOrEmpty(qop) || String.Equals(qop, "auth", StringComparison.InvariantCultureIgnoreCase))
{
A2 = String.Format("{0}:{1}", method, url);
}
else if (String.Equals(qop, "auth-int", StringComparison.InvariantCultureIgnoreCase))
{
if (entity_body != null && entity_body.Length > 0)
{
String hEntity = TSK_MD5.Compute(entity_body);
A2 = String.Format("{0}:{1}:{2}", method, url, hEntity);
}
else
{
A2 = String.Format("{0}:{1}:{2}", method, url, TSK_MD5.EMPTY);
}
}
return(TSK_MD5.Compute(A2));
}
/// <summary>
/// Generates HTTP digest response as per RFC 2617 subclause 3.2.2.1.
/// </summary>
/// <param name="ha1">HA1 string generated using @ref thttp_auth_digest_HA1 or @ref thttp_auth_digest_HA1sess.</param>
/// <param name="nonce">The nonce value</param>
/// <param name="noncecount">The nonce count</param>
/// <param name="cnonce">The client nounce (unquoted)</param>
/// <param name="qop">The Quality Of Protection (unquoted)</param>
/// <param name="ha2">HA2 string generated using @ref thttp_auth_digest_HA2</param>
/// <returns></returns>
public static String GetDigestResponse(String ha1, String nonce, UInt32 noncecount, String cnonce, String qop, String ha2)
{
/* RFC 2617 3.2.2.1 Request-Digest
*
* ============ CASE 1 ============
* If the "qop" value is "auth" or "auth-int":
* request-digest = <"> < KD ( H(A1), unq(nonce-value)
* ":" nc-value
* ":" unq(cnonce-value)
* ":" unq(qop-value)
* ":" H(A2)
* ) <">
* ============ CASE 2 ============
* If the "qop" directive is not present (this construction is for
* compatibility with RFC 2069):
* request-digest =
* <"> < KD ( H(A1), unq(nonce-value) ":" H(A2) ) >
* <">
*/
String res;
if (String.Equals(qop, "auth", StringComparison.InvariantCultureIgnoreCase) || String.Equals(qop, "auth-int", StringComparison.InvariantCultureIgnoreCase))
{
/* CASE 1 */
res = String.Format("{0}:{1}:{2}:{3}:{4}:{5}", ha1, nonce, noncecount, cnonce, qop, ha2);
}
else
{
/* CASE 2 */
res = String.Format("{0}:{1}:{2}", ha1, nonce, ha2);
}
return(TSK_MD5.Compute(res));
}
private void ResetCNonce()
{
if (!String.IsNullOrEmpty(mQop))
{
mCnonce = TSK_MD5.Compute(TSK_String.Random());
mNc = 1;
}
}
/// <summary>
/// Generates digest HA1 value as per RFC 2617 subclause 3.2.2.2.
/// </summary>
/// <param name="username"></param>
/// <param name="realm"></param>
/// <param name="password"></param>
/// <returns></returns>
public static String GetDigestHA1(String username, String realm, String password)
{
/* RFC 2617 - 3.2.2.2 A1
* A1 = unq(username-value) ":" unq(realm-value) ":" passwd
*/
String A1 = String.Format("{0}:{1}:{2}", username, realm, password);
return(TSK_MD5.Compute(A1));
}
/// <summary>
/// Generates digest HA1 value for 'MD5-sess' algo as per RFC 2617 subclause 3.2.2.2.
/// </summary>
/// <param name="username"></param>
/// <param name="realm"></param>
/// <param name="password"></param>
/// <param name="nonce"></param>
/// <param name="cnonce"></param>
/// <returns></returns>
public static String GetDigestHA1Sess(String username, String realm, String password, String nonce, String cnonce)
{
String A1Sess = String.Format("{0}:{1}:{2}:{3}:{4}", username, realm, password, nonce, cnonce);
return(TSK_MD5.Compute(A1Sess));
}