private String generateNonce() {
String timestamp = getTimestamp();
String nonce = Base64.encode(timestamp + MD5.md5sum(timestamp + ":" + this.nonceKey));
return nonce;
}
private AuthResult doAuthenticate(
HttpServletRequest request,
String uri,
String response,
String nc,
String nonce,
String cnonce,
String qop,
String username,
String opaque) {
StateEntry stateEntry = null;
if (this.maintainState) {
stateEntry = this.stateMap.get(nonce + ":" + opaque);
if (stateEntry != null) {
if (!stateEntry.getNonce().equals(nonce)) {
stateEntry.setStale(true);
throw new AuthenticationException(
"Authentication header field 'nonce': "
+ nonce
+ " does not match expected value: "
+ stateEntry.getNonce());
}
try {
long nonceCount = Long.parseLong(nc, 16);
if (nonceCount != stateEntry.getNonceCount()) {
throw new AuthenticationException(
"Authentication header field 'nc', value "
+ nc
+ " did not match expected value "
+ stateEntry.getNonceCount());
}
} catch (NumberFormatException e) {
throw new InvalidAuthenticationRequestException(
"Authentication header field 'nc' was not a hex number: " + nc);
}
}
}
Principal principal = principalFactory.getPrincipal(username, Principal.Type.USER);
if (principal == null) {
throw new AuthenticationException(
"Unable to authenticate principal using HTTP/Digest for request"
+ request
+ ": no principal found");
}
if (!this.principalStore.validatePrincipal(principal)) {
throw new AuthenticationException("Unknown principal in HTTP/Digest request: " + principal);
}
String componentA1 = this.principalStore.getMD5HashString(principal);
if (componentA1 == null) {
throw new AuthenticationException("Password hash for principal " + principal + " not found");
}
String componentA2 = MD5.md5sum(request.getMethod() + ":" + uri);
StringBuffer b = new StringBuffer();
b.append(componentA1);
b.append(":").append(nonce);
if (nc != null) b.append(":").append(nc);
if (cnonce != null) b.append(":").append(cnonce);
if (qop != null) b.append(":").append(qop);
b.append(":").append(componentA2);
String serverDigest = MD5.md5sum(b.toString());
if (this.logger.isDebugEnabled()) {
this.logger.debug("client digest: '" + response + "', server digest: '" + serverDigest + "'");
}
if (!serverDigest.equals(response)) {
throw new AuthenticationException(
"Authentication failure for principal " + principal + " (incorrect password)");
}
if (this.maintainState && stateEntry == null) {
stateEntry = new StateEntry(null, new Date(), nonce, 1, opaque);
stateEntry.setStale(true);
this.stateMap.put(nonce + ":" + opaque, stateEntry);
throw new AuthenticationException("Nothing known about request " + request);
} else if (this.maintainState && stateEntry != null && stateEntry.isStale()) {
throw new AuthenticationException(
"Stale nonce header field in authentication request: " + request);
}
if (this.logger.isDebugEnabled()) {
this.logger.debug("Successfully authenticated principal " + principal);
}
return new AuthResult(principal.getQualifiedName());
}