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Fix for https://bugs.cacert.org/view.php?id=964

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"VBscript, Weak Keys script 4.php, 17.php to combine / select box key
 size and lower limit to 2048" (Codename: Blackjack)
pull/1/head
Wytze van der Raay 11 years ago
parent 291f6cb1d4
commit b44c5dd1ca
2 changed files with 737 additions and 0 deletions
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128
includes/keygen.php
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<? /*
LibreSSL - CAcert web application
Copyright (C) 2004-2011 CAcert Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
if (array_key_exists('HTTP_USER_AGENT',$_SERVER) && strstr($_SERVER['HTTP_USER_AGENT'], "MSIE")) { ?>
<noscript>
<p><?=_('You have to enable JavaScript to generate certificates in the browser.')?></p>
<p><?=_('If you don\'t want to do that for any reason, you can use '.
'manually created certificate requests instead.')?></p>
</noscript>
<div id="noActiveX" style="color:red">
<p><?=_('Could not initialize ActiveX object required for certificate generation.')?></p>
<p><?=_('You have to enable ActiveX for this to work. On Windows Vista, Windows 7 and '.
'later versions you have to add this website to the list of trusted sites '.
'in the internet settings.')?></p>
<p><?php
printf(_('Go to "Extras -> Internet Options -> Security -> Trusted '.
'Websites", click on "Custom Level", set "ActiveX control '.
'elements that are not marked as safe initialized on start in '.
'scripts" to "Confirm" and click "OK". Now click "Sites", add '.
'"%s" and "%s" to your list of trusted sites and make the '.
'changes come into effect by clicking "Close" and "OK".'),
'https://'.$_SESSION['_config']['normalhostname'],
'https://'.$_SESSION['_config']['securehostname'])?>
</p>
</div>
<form method="post" style="display:none" action="account.php"
id="CertReqForm">
<input type="hidden" name="oldid" value="<?=intval($id)?>" />
<input type="hidden" id="CSR" name="CSR" />
<input type="hidden" name="keytype" value="MS" />
<p><?=_('Security level')?>:
<select id="SecurityLevel">
<option value="high" selected="selected"><?=_('High')?></option>
<option value="medium"><?=_('Medium')?></option>
<option value="custom"><?=_('Custom')?>&hellip;</option>
</select>
</p>
<fieldset id="customSettings" style="display:none">
<legend><?=_('Custom Parameters')?></legend>
<p><?=_('Cryptography Provider')?>:
<select id="CspProvider"></select>
</p>
<p><?=_('Algorithm')?>: <select id="algorithm"></select></p>
<p><?=_('Keysize')?>:
<input id="keySize" type="number" />
<?=_('Minimum Size')?>: <span id="keySizeMin"></span>,
<?=_('Maximum Size')?>: <span id="keySizeMax"></span>,
<?php
// TRANSLATORS: this specifies the step between two valid key
// sizes. E.g. if the step is 512 and the minimum is 1024 and
// the maximum is 2048, then only 1024, 1536 and 2048 bits may
// be specified as key size.
echo _('Step')?>: <span id="keySizeStep"></span></p>
<p style="color:red"><?php
printf(_('Please note that RSA key sizes smaller than %d bit '.
'will not be accepted by CAcert.'),
1024)?>
</p>
</fieldset>
<p><input type="submit" id="GenReq" name="GenReq" value="<?=_('Create Certificate')?>" /></p>
<p id="generatingKeyNotice" style="display:none">
<?=_('Generating your key. Please wait')?>&hellip;</p>
</form>
<!-- Error messages used in the JavaScript. Defined here so they can be
translated without passing the JavaScript code through PHP -->
<p id="createRequestErrorChooseAlgorithm" style="display:none">
<?=_('Could not generate certificate request. Probably you need to '.
'choose a different algorithm.')?>
</p>
<p id="createRequestErrorConfirmDialogue" style="display:none">
<?=_('Could not generate certificate request. Please confirm the '.
'dialogue if you are asked if you want to generate the key.')?>
</p>
<p id="createRequestErrorConnectDevice" style="display:none">
<?=_('Could not generate certificate request. Please make sure the '.
'cryptography device (e.g. the smartcard) is connected.')?>
</p>
<p id="createRequestError" style="display:none">
<?=_('Could not generate certificate request.')?>
</p>
<p id="invalidKeySizeError" style="display:none">
<?=_('You have specified an invalid key size')?>
</p>
<p id="unsupportedPlatformError" style="display:none">
<?=_('Could not initialize the cryptographic module for your '.
'platform. Currently we support Microsoft Windows XP, Vista '.
'and 7. If you\'re using one of these platforms and see this '.
'error message anyway you might have to enable ActiveX as '.
'described in the red explanation text and accept loading of '.
'the module.')?>
</p>
<script type="text/javascript" src="keygenIE.js"></script>
<? } else { ?>
<p>
<form method="post" action="account.php">
<input type="hidden" name="keytype" value="NS">
<?=_("Keysize:")?> <keygen name="SPKAC" challenge="<? $_SESSION['spkac_hash']=make_hash(); echo $_SESSION['spkac_hash']; ?>">
<input type="submit" name="submit" value="<?=_("Create Certificate Request")?>">
<input type="hidden" name="oldid" value="<?=intval($id)?>">
</form>
</p>
<? }

609
www/keygenIE.js
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/*
LibreSSL - CAcert web application
Copyright (C) 2004-2012 CAcert Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
var CAcert_keygen_IE = function () {
/// Makes a new DOM text node
var textnode = function (text) {
return document.createTextNode(text);
}
/// makes a new <p> element
var paragraph = function (text) {
var paragraph = document.createElement("p");
paragraph.appendChild(textnode(text));
return paragraph;
}
/// makes a new <pre> elemtent
var pre = function (text) {
var pre = document.createElement("pre");
pre.appendChild(textnode(text));
return pre;
}
/// makes a new <option> element
var option = function (text, value) {
var option = document.createElement("option");
if (value !== undefined) {
option.setAttribute("value", value);
}
option.appendChild(textnode(text));
return option;
}
/// Removes all child nodes from the element
var removeChildren = function (element) {
element.innerHTML = "";
}
/// Show error message to user from exception
var showError = function (message, exception) {
window.alert(
message +
"\n\nError: " + exception.message +
" (0x" + (0xFFFFFFFF + exception.number + 1).toString(16) +
" / " + exception.number + ")"
);
}
// Get important elements from the DOM
var form = document.getElementById("CertReqForm");
var securityLevel = document.getElementById("SecurityLevel");
var customSettings = document.getElementById("customSettings");
var provider = document.getElementById("CspProvider");
var algorithm = document.getElementById("algorithm");
var algorithmParagraph = document.getElementById("algorithmParagraph");
var keySize = document.getElementById("keySize");
var keySizeMin = document.getElementById("keySizeMin");
var keySizeMax = document.getElementById("keySizeMax");
var keySizeStep = document.getElementById("keySizeStep");
var genReq = document.getElementById("GenReq");
var csr = document.getElementById("CSR");
var noActiveX = document.getElementById("noActiveX");
var generatingKeyNotice = document.getElementById("generatingKeyNotice");
var createRequestErrorChooseAlgorithm = document.getElementById("createRequestErrorChooseAlgorithm");
var createRequestErrorConfirmDialogue = document.getElementById("createRequestErrorConfirmDialogue");
var createRequestErrorConnectDevice = document.getElementById("createRequestErrorConnectDevice");
var createRequestError = document.getElementById("createRequestError");
var invalidKeySizeError = document.getElementById("invalidKeySizeError");
var unsupportedPlatformError = document.getElementById("unsupportedPlatformError");
/// Initialise the CertEnroll code (Vista and higher)
/// returns false if initialisation fails
var initCertEnroll = function () {
var factory = null;
var providerList = null;
var cspStats = null;
// Try to initialise the ActiveX element. Requires permissions by the user
try {
factory = new ActiveXObject("X509Enrollment.CX509EnrollmentWebClassFactory");
if (!factory) {
throw {
name: "NoObjectError",
message: "Got null at object creation"
};
}
// also try to create a useless object here so the library gets
// initialised and we don't need to check everytime later
factory.CreateObject("X509Enrollment.CObjectId");
form.style.display = "";
noActiveX.style.display = "none";
} catch (e) {
return false;
}
/// Get the selected provider
var getProvider = function () {
var providerIndex = provider.options[provider.selectedIndex].value;
return providerList.ItemByIndex(providerIndex);
}
/// Get the selected algorithm
var getAlgorithm = function () {
var algorithmIndex = algorithm.options[algorithm.selectedIndex].value;
return alg = cspStats.ItemByIndex(algorithmIndex).CspAlgorithm;
}
/// Get the selected key size
var getKeySize = function () {
var alg = getAlgorithm();
var bits = parseInt(keySize.value, 10);
if (
(bits < alg.MinLength) ||
(bits > alg.MaxLength) ||
(
alg.IncrementLength &&
((bits - alg.MinLength) % alg.IncrementLength !== 0)
)
) {
return false;
}
return bits;
}
/// Fill the key size list
var getKeySizeList = function () {
if (!cspStats) {
return false;
}
var alg = getAlgorithm();
// HTML5 attributes
keySize.setAttribute("min", alg.MinLength);
keySize.setAttribute("max", alg.MaxLength);
keySize.setAttribute("step", alg.IncrementLength);
keySize.setAttribute("value", alg.DefaultLength);
keySize.value = ""+alg.DefaultLength;
// ugly, but buggy otherwise if done with text nodes
keySizeMin.innerHTML = alg.MinLength;
keySizeMax.innerHTML = alg.MaxLength;
keySizeStep.innerHTML = alg.IncrementLength;
return true;
}
/// Fill the algorithm list
var getAlgorithmList = function () {
var i;
if (!providerList) {
return false;
}
var csp = getProvider();
cspStats = providerList.GetCspStatusesFromOperations(
0x1c, //XCN_NCRYPT_ANY_ASYMMETRIC_OPERATION
//0x10, //XCN_NCRYPT_SIGNATURE_OPERATION
//0x8, //XCN_NCRYPT_SECRET_AGREEMENT_OPERATION
//0x4, //XCN_NCRYPT_ASYMMETRIC_ENCRYPTION_OPERATION
csp
);
removeChildren(algorithm);
for (i = 0; i < cspStats.Count; i++) {
var alg = cspStats.ItemByIndex(i).CspAlgorithm;
algorithm.appendChild(option(alg.Name, i));
}
return getKeySizeList();
}
/// Fill the crypto provider list
var getProviderList = function () {
var i;
var csps = factory.CreateObject("X509Enrollment.CCspInformations");
// Get provider information
csps.AddAvailableCsps();
removeChildren(provider);
for (i = 0; i < csps.Count; i++) {
var csp = csps.ItemByIndex(i);
provider.appendChild(option(csp.Name, i));
}
providerList = csps;
return getAlgorithmList();
}
/// Generate a key and create and submit the actual CSR
var createCSR = function () {
var providerName, algorithmOid, bits;
var level = securityLevel.options[securityLevel.selectedIndex];
if (level.value === "custom") {
providerName = getProvider().Name;
var alg = getAlgorithm();
algorithmOid = alg.GetAlgorithmOid(0, 0)
bits = getKeySize();
if (!bits) {
window.alert(invalidKeySizeError.innerHTML);
return false;
}
} else {
providerName = "Microsoft Software Key Storage Provider";
algorithmOid = factory.CreateObject("X509Enrollment.CObjectId");
algorithmOid.InitializeFromValue("1.2.840.113549.1.1.1"); // RSA
// "1.2.840.10040.4.1" == DSA
// "1.2.840.10046.2.1" == DH
if (level.value === "high") {
bits = 4096;
} else { // medium
bits = 2048;
}
}
var privateKey = factory.CreateObject("X509Enrollment.CX509PrivateKey");
privateKey.ProviderName = providerName;
privateKey.Algorithm = algorithmOid;
privateKey.Length = bits;
privateKey.KeyUsage = 0xffffff; // XCN_NCRYPT_ALLOW_ALL_USAGES
var request = factory.CreateObject("X509Enrollment.CX509CertificateRequestPkcs10");
request.InitializeFromPrivateKey(
1, // ContextUser
privateKey,
"" // don't use a template
);
var enroll = factory.CreateObject("X509Enrollment.CX509Enrollment");
enroll.InitializeFromRequest(request);
generatingKeyNotice.style.display = "";
// The request needs to be created after we return so the "please wait"
// message gets rendered
var createCSRHandler = function () {
try {
csr.value = enroll.CreateRequest(0x1); //XCN_CRYPT_STRING_BASE64
form.submit();
} catch (e) {
showError(createRequestErrorChooseAlgorithm.innerHTML, e);
}
generatingKeyNotice.style.display = "none";
}
window.setTimeout(createCSRHandler, 0);
// Always return false, form is submitted by deferred method
return false;
}
/// Call if securityLevel has changed
var refreshSecurityLevel = function () {
var level = securityLevel.options[securityLevel.selectedIndex];
if (level.value === "custom") {
getProviderList();
customSettings.style.display = "";
} else {
customSettings.style.display = "none";
}
}
securityLevel.onchange = refreshSecurityLevel;
provider.onchange = getAlgorithmList;
algorithm.onchange = getKeySizeList;
genReq.onclick = createCSR;
return true;
} // end of initCertEnroll()
/// Initialise Xenroll code (XP and lower)
/// returns false if initialisation fails
var initXEnroll = function () {
cenroll = null;
providerTypes = Array(
1, //PROV_RSA_FULL
2, //PROV_RSA_SIG
3, //PROV_DSS
4, //PROV_FORTEZZA
5, //PROV_MS_EXCHANGE
6, //PROV_SSL
12, //PROV_RSA_SCHANNEL
13, //PROV_DSS_DH
14, //PROV_EC_ECDSA_SIG
15, //PROV_EC_ECNRA_SIG
16, //PROV_EC_ECDSA_FULL
17, //PROV_EC_ECNRA_FULL
18, //PROV_DH_SCHANNEL
20, //PROV_SPYRUS_LYNKS
21, //PROV_RNG
22, //PROV_INTEL_SEC
23, //PROV_REPLACE_OWF
24 //PROV_RSA_AES
);
algClasses = Array(
1 << 13, //ALG_CLASS_SIGNATURE
//2 << 13, //ALG_CLASS_MSG_ENCRYPT
//3 << 13, //ALG_CLASS_DATA_ENCRYPT
//4 << 13, //ALG_CLASS_HASH
5 << 13 //ALG_CLASS_KEY_EXCHANGE
);
// Try to initialise the ActiveX element.
try {
cenroll = new ActiveXObject("CEnroll.CEnroll");
if (!cenroll) {
throw {
name: "NoObjectError",
message: "Got null at object creation"
};
}
form.style.display = "";
algorithm.disabled = true;
noActiveX.style.display = "none";
} catch (e) {
return false;
}
/// Get the name of the selected provider
var getProviderName = function () {
return provider.options[provider.selectedIndex].text;
}
/// Get the type of the selected provider
var getProviderType = function () {
return parseInt(provider.options[provider.selectedIndex].value, 10);
}
var refreshProvider = function () {
cenroll.ProviderName = getProviderName();
cenroll.ProviderType = getProviderType();
}
/// Get the ID of the selected algorithm
var getAlgorithmId = function () {
return parseInt(algorithm.options[algorithm.selectedIndex].value, 10);
}
/// Minimum bit length for exchange keys
var getMinExKeyLength = function () {
refreshProvider();
try {
return cenroll.GetKeyLen(true, true);
} catch (e) {
return false;
}
}
/// Maximum bit length for exchange keys
var getMaxExKeyLength = function () {
refreshProvider();
try {
return cenroll.GetKeyLen(false, true);
} catch (e) {
return false;
}
}
/// Step size for exchange keys
/// This might not be available on older platforms
var getStepExKeyLength = function () {
refreshProvider();
try {
return cenroll.GetKeyLenEx(3, 1);
} catch (e) {
return false;
}
}
/// Minimum bit length for signature keys
var getMinSigKeyLength = function () {
refreshProvider();
try {
return cenroll.GetKeyLen(true, false);
} catch (e) {
return false;
}
}
/// Maximum bit length for signature keys
var getMaxSigKeyLength = function () {
refreshProvider();
try {
return cenroll.GetKeyLen(false, false);
} catch (e) {
return false;
}
}
/// Step size for signature keys
/// This might not be available on older platforms
var getStepSigKeyLength = function () {
refreshProvider();
try {
return cenroll.GetKeyLenEx(3, 2);
} catch (e) {
return false;
}
}
/// Get the selected key size
var getKeySize = function () {
var bits = parseInt(keySize.value, 10);
if (
(bits < getMinSigKeyLength()) ||
(bits > getMaxSigKeyLength()) ||
(
getStepSigKeyLength() &&
((bits - getMinSigKeyLength()) % getStepSigKeyLength() !== 0)
)
) {
return false;
}
return bits;
}
var getKeySizeLimits = function () {
// HTML5 attributes
keySize.setAttribute("min", getMinSigKeyLength());
keySize.setAttribute("max", getMaxSigKeyLength());
if (getStepSigKeyLength()) {
keySize.setAttribute("step", getStepSigKeyLength());
}
// ugly, but buggy otherwise if done with text nodes
keySizeMin.innerHTML = getMinSigKeyLength();
keySizeMax.innerHTML = getMaxSigKeyLength();
keySizeStep.innerHTML = getStepSigKeyLength();
if (getMinSigKeyLength() === getMaxSigKeyLength()) {
keySize.value = getMaxSigKeyLength();
}
return true;
}
/// Fill the algorithm selection box
var getAlgorithmList = function () {
var i, j;
refreshProvider();
removeChildren(algorithm);
for (i = 0; i < algClasses.length; ++i) {
for (j = 0; true; ++j) {
try {
var algId = cenroll.EnumAlgs(j, algClasses[i]);
var algName = cenroll.GetAlgName(algId);
algorithm.appendChild(option(algName, algId));
} catch (e) {
break;
}
}
}
getKeySizeLimits();
}
/// Fill the provider selection box
var getProviderList = function () {
var i, j;
removeChildren(provider);
for (i = 0; i < providerTypes.length; ++i) {
cenroll.providerType = providerTypes[i];
var providerName = "invalid";
for (j = 0; true; ++j) {
try {
providerName = cenroll.enumProviders(j, 0);
provider.appendChild(option(providerName, providerTypes[i]));
} catch (e) {
break;
}
}
}
return getAlgorithmList();
}
var createCSR = function () {
var providerName, bits;
var level = securityLevel.options[securityLevel.selectedIndex];
if (level.value === "custom") {
refreshProvider();
bits = getKeySize();
if (bits === false) {
window.alert(invalidKeySizeError.innerHTML);
return false;
}
} else {
cenroll.ProviderName = "Microsoft Enhanced Cryptographic Provider v1.0";
cenroll.ProviderType = 1; //PROV_RSA_FULL
if (level.value === "high") {
bits = 4096;
} else { // medium
bits = 2048;
}
}
cenroll.GenKeyFlags = bits << 16; // keysize is encoded in the uper 16 bits
//cenroll.GenKeyFlags = cenroll.GenKeyFlags | 0x1; //CRYPT_EXPORTABLE
generatingKeyNotice.style.display = "";
// The request needs to be created after we return so the "please wait"
// message gets rendered
var createCSRHandler = function () {
try {
csr.value = cenroll.createPKCS10("", "1.3.6.1.5.5.7.3.2");
form.submit();
} catch (e) {
if (e.number === -2147023673) {
// 0x800704c7 => dialogue declined
showError(createRequestErrorConfirmDialogue.innerHTML, e);
} else if (e.number === -2146435043) {
// 0x8010001d => crypto-device not connected
showError(createRequestErrorConnectDevice.innerHTML, e);
} else {
showError(createRequestError.innerHTML, e);
}
}
generatingKeyNotice.style.display = "none";
cenroll.Reset();
}
window.setTimeout(createCSRHandler, 0);
// Always return false, form is submitted by deferred method
return false;
}
/// Call if securityLevel has changed
var refreshSecurityLevel = function () {
var level = securityLevel.options[securityLevel.selectedIndex];
if (level.value === "custom") {
getProviderList();
customSettings.style.display = "";
} else {
customSettings.style.display = "none";
}
}
securityLevel.onchange = refreshSecurityLevel;
provider.onchange = getAlgorithmList;
algorithm.onchange = getKeySizeLimits;
genReq.onclick = createCSR;
return true;
};
// Run the init functions until one is successful
if (initCertEnroll()) {
form.style.display = "";
noActiveX.style.display = "none";
} else if (initXEnroll()) {
form.style.display = "";
noActiveX.style.display = "none";
} else {
window.alert(unsupportedPlatformError.innerHTML);
}
} ();
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