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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
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+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+<html>
+<head>
+<!-- This Source Code Form is subject to the terms of the Mozilla Public
+ - License, v. 2.0. If a copy of the MPL was not distributed with this
+ - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
+
+
+ <meta http-equiv="content-type" content="text/html; charset=ISO-8859-1">
+ <title>Stan Design - Work In Progress</title>
+</head>
+ <body>
+ <br>
+ This is a working document for progress on Stan design/development.<br>
+ <br>
+ Current <a href="#build">build</a>
+ and <a href="#test">test</a>
+ instructions.<br>
+ <br>
+ The current set of Stan libraries.<br>
+ <a href="#asn1">asn1</a>
+ <br>
+ <a href="#base">base</a>
+ <br>
+ <a href="#ckfw">ckfw</a>
+ <br>
+ <a href="#dev">dev</a>
+ <br>
+ <a href="#pki">pki</a>
+ <br>
+ <a href="#pki1">pki1</a>
+ <br>
+ <a href="#pkix">pkix</a>
+ <br>
+ <br>
+ "Public" types below (those available to consumers of
+ NSS) begin with "NSS". &nbsp;"Protected" types (those only available
+ within NSS) begin with "nss".<br>
+ <br>
+ Open issues appears as numbered indents.<br>
+ <br>
+ <br>
+
+<hr width="100%" size="2" align="Left"><br>
+
+<h3><a name="asn1"></a>
+ <a href="http://lxr.mozilla.org/mozilla/source/security/nss/lib/asn1/">
+ ASN.1</a>
+ </h3>
+ ASN.1 encoder/decoder wrapping around the current
+ ASN.1 implementation.<br>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSASN1EncodingType"> NSSASN1EncodingType</a>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=nssASN1Item">nssASN1Item</a>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=nssASN1Template">nssASN1Template</a>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=nssASN1ChooseTemplateFunction">
+ nssASN1ChooseTemplateFunction</a>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=nssASN1Encoder">nssASN1Encoder</a>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=nssASN1Decoder">nssASN1Decoder</a>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=nssASN1EncodingPart"> nssASN1EncodingPart</a>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=nssASN1NotifyFunction">
+ nssASN1NotifyFunction</a>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=nssASN1EncoderWriteFunction">
+ nssASN1EncoderWriteFunction</a>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=nssASN1DecoderFilterFunction">
+ nssASN1DecoderFilterFunction</a>
+ <br>
+ <br>
+
+<hr width="100%" size="2" align="Left">
+<h3><a name="base"></a>
+ <a href="http://lxr.mozilla.org/mozilla/source/security/nss/lib/base/">
+ Base</a>
+ </h3>
+ Set of base utilities for Stan implementation.
+&nbsp;These are all fairly straightforward, except for nssPointerTracker.<br>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSError">NSSError</a>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSArena">NSSArena</a>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSItem">NSSItem</a>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSBER">NSSBER</a>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSDER">NSSDER</a>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSBitString">NSSBitString</a>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSUTF8">NSSUTF8</a>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSASCII7">NSSASCII7</a>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=nssArenaMark">nssArenaMark</a>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=nssPointerTracker">nssPointerTracker</a>
+ <br>
+ This is intended for debug builds only.<br>
+
+<ol>
+ <li>Ignored for now.<br>
+ </li>
+
+</ol>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=nssStringType">nssStringType</a>
+ <br>
+ <br>
+ Suggested additions:<br>
+
+<ol>
+ <li>nssList - A list that optionally uses a lock. &nbsp;This list would
+ manage the currently loaded modules in a trust domain, etc.</li>
+
+ <ul>
+ <li>SECMODListLock kept track of the number of waiting threads. &nbsp;Will
+ this be needed in the trust domain?</li>
+
+ </ul>
+
+</ol>
+ <br>
+
+<hr width="100%" size="2" align="Left">
+<h3><a name="ckfw"></a>
+ <a href="http://lxr.mozilla.org/mozilla/source/security/nss/lib/ckfw/">
+ CKFW</a>
+ </h3>
+ The cryptoki framework, used for building cryptoki tokens.
+ &nbsp;This needs to be described in a separate document showing how
+ to set up a token using CKFW. &nbsp;This code only relates to tokens,
+ so it is not relevant here.<br>
+ <br>
+ <br>
+
+<hr width="100%" size="2" align="Left">
+<h3><a name="dev"></a>
+ <a href="http://lxr.mozilla.org/mozilla/source/security/nss/lib/dev/">
+ Device</a>
+ </h3>
+ Defines cryptoki devices used in NSS. &nbsp;This
+ is not part of the exposed API. &nbsp;It is a low-level API allowing
+NSS to manage cryptoki devices.<br>
+ <br>
+ The relationship is like this:<br>
+ <br>
+ libpki --&gt; libdev --&gt; cryptoki<br>
+ <br>
+ As an example,<br>
+ <br>
+ NSSTrustDomain_FindCertificate --&gt; NSSToken_FindCertificate --&gt;
+ C_FindObjects<br>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSModule">NSSModule</a>
+ <br>
+ Replaces the SECMOD API. &nbsp;The module manages a
+PRLibrary that holds a cryptoki implementation via a number of slots.
+&nbsp;The API should provide the ability to Load and Unload a module,
+Login and Logout to the module (through its slots), and to locate a
+particular slot/token.<br>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSSlot">NSSSlot</a>
+ <br>
+ This and NSSToken combine to replace the PK11 API parts
+ that relate to slot and token management. &nbsp;The slot API should
+ provide the ability to Login/Logout to a slot, check the login status,
+ determine basic configuration information about the slot, and modify
+ the password settings.<br>
+
+<ol>
+ <li>Should slots also maintain a default session? &nbsp;This session would
+ be used for slot management calls (sections 9.5 and9.6 of PKCS#11). &nbsp;Or
+ is the token session sufficient (this would not work if C_GetTokenInfo and
+ C_InitToken need to be wrapped in a threadsafe session).<br>
+ </li>
+
+</ol>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSToken">NSSToken</a>
+ <br>
+ Fills in the gaps left by NSSSlot. &nbsp;Much of the
+cryptoki API is directed towards slots. &nbsp;However, some functionality
+ clearly belongs with a token type. &nbsp;For example, a certificate
+ lives on a token, not a slot, so one would expect a function NSSToken_FindCertificate.
+ &nbsp;Thus functions that deal with importing/exporting an object
+and performing actual cryptographic operations belong here.<br>
+
+<ol>
+ <li>The distinction between a slot and a token is not clear. &nbsp;Most
+ functions take a slotID as an argument, even though it is obvious that
+ the event is intended to occur on a token. &nbsp;That leaves various
+ possibilities:</li>
+
+ <ol>
+ <li>Implement the API entirely as NSSToken. &nbsp;If the token is not
+ present, some calls will simply fail.</li>
+ <li>Divide the API between NSSToken and NSSSlot, as described above.
+&nbsp;NSSSlot would handle cryptoki calls specified as "slot management",
+ while NSSToken handles actual token operations.</li>
+ <li>Others?</li>
+
+ </ol>
+ <li>Session management. &nbsp;Tokens needs a threadsafe session handle
+ to perform operations. &nbsp;CryptoContexts are meant to provide such sessions,
+ but other objects will need access to token functions as well (examples:
+the TrustDomain_Find functions, _Login, _Logout, and others that do not exist
+ such as NSSToken_ChangePassword). &nbsp;For those functions, the token could
+ maintain a default session. &nbsp;Thus all NSSToken API functions would take
+ sessionOpt as an argument. &nbsp;If the caller is going to provide a session,
+ it sends an NSSSession there, otherwise it sends NULL and the default session
+ is utilized.<br>
+ </li>
+
+</ol>
+ Proposed:<br>
+ NSSSession<br>
+ Wraps a Cryptoki session. &nbsp;Created from a slot. &nbsp;Used to manage
+ sessions for crypto contexts. &nbsp;Has a lock field, which locks the session
+ if the slot is not threadsafe.<br>
+ <br>
+
+<hr width="100%" size="2" align="Left"><br>
+
+<h3><a name="pki"></a>
+ <a href="http://lxr.mozilla.org/mozilla/source/security/nss/lib/pki/">
+ PKI</a>
+ </h3>
+ The NSS PKI library.<br>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSCertificate">NSS</a>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSCertificate">Certificate</a>
+ <br>
+
+<ol>
+ <li>The API leaves open the possibility of NSSCertificate meaning various
+ certificate types, not just X.509. &nbsp;The way to keep open this possibility
+ is to keep only generally useful information in the NSSCertificate type.
+&nbsp;Examples would be the certificate encoding, label, trust (obtained
+ from cryptoki calls), an email address, etc. &nbsp;Some type of generic
+reference should be kept to the decoded certificate, which would then be
+accessed by a type-specific API (e.g., NSSX509_GetSubjectName).</li>
+
+</ol>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSUserCertificate">NSSUserCertificate</a>
+ <br>
+
+<ol>
+ <li>Should this be a typedef of NSSCertificate?&nbsp; This implies that
+ any function that requires an NSSUserCertificate would fail when called
+ with a certificate lacking a private key. </li>
+
+</ol>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSPrivateKey">NSSPrivateKey</a>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSPublicKey">NSSPublicKey</a>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSSymmetricKey">NSSSymmetricKey</a>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSTrustDomain">NSSTrustDomain</a>
+ <br>
+ A trust domain is "the field in which certificates may
+ be validated." &nbsp;It is a collection of modules capable of performing
+ cryptographic operations and storing certs and keys. &nbsp;This collection
+ is managed by NSS in a manner opaque to the consumer. &nbsp;The slots
+ will have various orderings determining which has preference for a
+given operation. &nbsp;For example, the trust domain may order the storage
+ of user certificates one way, and the storage of email certificates in
+ another way [is that a good example?].<br>
+ <br>
+
+<ol>
+ <li> How will ordering work? &nbsp;We already have the suggestion
+ that there be two kinds of ordering: storage and search. &nbsp;How
+will they be constructed/managed? &nbsp;Do we want to expose access
+to a token that overrides this ordering (i.e., the download of updated
+root certs may need to override storage order)</li>
+ <li>How are certs cached? &nbsp;Nelson wonders what it means to Stan
+ when a cert does not live on a token yet. &nbsp;Bob, Terry, and I discussed
+ this. &nbsp;My conclusion is that there should be a type, separate
+from NSSCertificate, that holds the decoded cert parts (e.g., NSSX509Certificate,
+ or to avoid confusion, NSSX509DecodedParts). &nbsp;NSSCertificate would
+ keep a handle to this type, so that it only needs to decode the cert
+once. &nbsp;The NSSTrustDomain would keep a hash table of cached certs,
+some of which may not live on a token yet (i.e., they are only NSSX509DecodedParts).
+ &nbsp;This cache could be accessed in the same way the temp db was,
+and when the cert is ready to be moved onto a token a call to NSSTrustDomain_ImportCertificate
+ is made. &nbsp;Note that this is essentially the same as CERT_TempCertToPerm.</li>
+
+ <ul>
+ <li>The hashtable in lib/base (copied from ckfw/hash.c) uses the identity
+hash. &nbsp;Therefore, in a hash of certificates, the key is the certificate
+pointer itself. &nbsp;One possibility is to store the decoded cert (NSSX509DecodedParts
+above) as the value in the {key, value} pair. &nbsp;When a cert is decoded,
+the cert pointer and decoding pointer are added to the hash. &nbsp;Subsequent
+lookups have access to one or both of these pointers. &nbsp;This keeps NSSCertificate
+separate from its decoding, while providing a way to locate it.</li>
+
+ </ul>
+ <li>The API is designed to keep token details hidden from the user. &nbsp;However,
+ it has already been realized that PSM and CMS may need special access to
+tokens. &nbsp;Is this part of the TrustDomain API, or should PSM and CMS
+be allowed to use "friend" headers from the Token API?</li>
+ <li>Do we want to allow traversal via NSSTrustDomain_TraverseXXXX?<br>
+ </li>
+
+</ol>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSCryptoContext"><br>
+ NSSCryptoContext</a>
+ <br>
+ Analgous to a Cryptoki session. &nbsp;Manages session objects only.<br>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSTime">NSSTime</a>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSUsage">NSSUsage</a>
+ <br>
+
+<ol>
+ <li> See Fred's <a href="http://lxr.mozilla.org/mozilla/source/security/nss/lib/pki/nsspkit.h#187">
+ comments</a>
+ .</li>
+
+</ol>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSPolicies">NSSPolicies</a>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSAlgorithmAndParameters">
+ NSSAlgorithmAndParameters</a>
+ <br>
+
+<ol>
+ <li> Again, Fred's <a href="http://lxr.mozilla.org/mozilla/source/security/nss/lib/pki/nsspkit.h#215">
+ comments</a>
+ . &nbsp;The old NSS code had various types related to algorithms
+ running around in it. &nbsp;We had SECOidTag, SECAlgorithmID, SECItem's
+ for parameters, CK_MECHANISM for cryptoki, etc. &nbsp;This type should
+ be able to encapsulate all of those.</li>
+
+</ol>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSCallback">NSSCallback</a>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSOperations">NSSOperations</a>
+ <br>
+ <br>
+ <br>
+
+<hr width="100%" size="2"><br>
+ <br>
+ A diagram to suggest a possible TrustDomain architecture.<br>
+ <br>
+ <img src="./standiag.png" alt="Trust Domain Diagram" width="748" height="367">
+ <br>
+
+<hr width="100%" size="2" align="Left"><br>
+
+<h3><a name="pki1"></a>
+ <a href="http://lxr.mozilla.org/mozilla/source/security/nss/lib/pki1/">
+ PKI1</a>
+ </h3>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSOID">NSSOID</a>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSATAV">NSSATAV</a>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSRDN">NSSRDN</a>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSRDNSeq">NSSRDNSeq</a>
+ <br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=NSSName">NSSName</a>
+ <br>
+ NSSNameChoice<br>
+ NSSGeneralName<br>
+ NSSGeneralNameChoice<br>
+ NSSOtherName<br>
+ NSSRFC822Name<br>
+ NSSDNSName<br>
+ NSSX400Address<br>
+ NSSEdiParityAddress<br>
+ NSSURI<br>
+ NSSIPAddress<br>
+ NSSRegisteredID<br>
+ NSSGeneralNameSeq<br>
+ <a href="http://lxr.mozilla.org/mozilla/ident?i=nssAttributeTypeAliasTable">
+ nssAttributeTypeAliasTable</a>
+ <br>
+ <br>
+ <br>
+
+<hr width="100%" size="2" align="Left"><br>
+
+<h3><a name="pkix"></a>
+ <a href="http://lxr.mozilla.org/mozilla/source/security/nss/lib/pkix/">
+ PKIX&nbsp;</a>
+ </h3>
+ There is a plethora of PKIX related types here.<br>
+ <br>
+
+<hr width="100%" size="2" align="Left"><br>
+
+<h3><a name="build"></a>
+ Building Stan</h3>
+ <br>
+ From nss/lib, run "make BUILD_STAN=1"<br>
+ <br>
+
+<hr width="100%" size="2" align="Left"><br>
+
+<h3><a name="test"></a>
+ Testing Stan</h3>
+ A&nbsp;new command line tool, pkiutil, has been created to use only
+ the Stan API. &nbsp;It depends on a new library, cmdlib, meant to replace
+ the old secutil library. &nbsp;The old library had code used by products
+ that needed to be integrated into the main library codebase somehow. &nbsp;The
+ goal of the new cmdlib is to have functionality needed strictly for NSS
+ tools.<br>
+ <br>
+ How to build:<br>
+
+<ol>
+ <li>cd nss/cmd/cmdlib; make</li>
+ <li>cd ../pkiutil; make</li>
+
+</ol>
+ pkiutil will give detailed help with either "pkiutil -?" or "pkiutil
+ --help".<br>
+ <br>
+ So far, the only available test is to list certs on the builtins token.
+ &nbsp;Copy "libnssckbi.so" (or whatever it is) to cmd/pkiutil. &nbsp;Then
+ run "pkiutil -L" or "pkiutil --list". &nbsp;The list of certificate nicknames
+ should be displayed.<br>
+ <br>
+ <br>
+
+</body>
+</html>