DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (a81015259a98)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is the Netscape security libraries.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1994-2000
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */
/*
 * certi.h - private data structures for the certificate library
 *
 * $Id: certi.h,v 1.36 2011/09/14 23:16:14 wtc%google.com Exp $
 */
#ifndef _CERTI_H_
#define _CERTI_H_

#include "certt.h"
#include "nssrwlkt.h"

/*
#define GLOBAL_RWLOCK 1
*/

#define DPC_RWLOCK 1

/* all definitions in this file are subject to change */

typedef struct OpaqueCRLFieldsStr OpaqueCRLFields;
typedef struct CRLEntryCacheStr CRLEntryCache;
typedef struct CRLDPCacheStr CRLDPCache;
typedef struct CRLIssuerCacheStr CRLIssuerCache;
typedef struct CRLCacheStr CRLCache;
typedef struct CachedCrlStr CachedCrl;
typedef struct NamedCRLCacheStr NamedCRLCache;
typedef struct NamedCRLCacheEntryStr NamedCRLCacheEntry;

struct OpaqueCRLFieldsStr {
    PRBool partial;
    PRBool decodingError;
    PRBool badEntries;
    PRBool badDER;
    PRBool badExtensions;
    PRBool heapDER;
};

typedef struct PreAllocatorStr PreAllocator;

struct PreAllocatorStr
{
    PRSize len;
    void* data;
    PRSize used;
    PRArenaPool* arena;
    PRSize extra;
};

/*  CRL entry cache.
    This is the same as an entry plus the next/prev pointers for the hash table
*/

struct CRLEntryCacheStr {
    CERTCrlEntry entry;
    CRLEntryCache *prev, *next;
};

#define CRL_CACHE_INVALID_CRLS              0x0001 /* this state will be set
        if we have CRL objects with an invalid DER or signature. Can be
        cleared if the invalid objects are deleted from the token */
#define CRL_CACHE_LAST_FETCH_FAILED         0x0002 /* this state will be set
        if the last CRL fetch encountered an error. Can be cleared if a
        new fetch succeeds */

#define CRL_CACHE_OUT_OF_MEMORY             0x0004 /* this state will be set
        if we don't have enough memory to build the hash table of entries */

typedef enum {
    CRL_OriginToken = 0,    /* CRL came from PKCS#11 token */
    CRL_OriginExplicit = 1  /* CRL was explicitly added to the cache, from RAM */
} CRLOrigin;

typedef enum {
    dpcacheNoEntry = 0,             /* no entry found for this SN */
    dpcacheFoundEntry = 1,          /* entry found for this SN */
    dpcacheCallerError = 2,         /* invalid args */
    dpcacheInvalidCacheError = 3,   /* CRL in cache may be bad DER */
                                    /* or unverified */
    dpcacheEmpty = 4,               /* no CRL in cache */
    dpcacheLookupError = 5          /* internal error */
} dpcacheStatus;


struct CachedCrlStr {
    CERTSignedCrl* crl;
    CRLOrigin origin;
    /* hash table of entries. We use a PLHashTable and pre-allocate the
       required amount of memory in one shot, so that our allocator can
       simply pass offsets into it when hashing.

       This won't work anymore when we support delta CRLs and iCRLs, because
       the size of the hash table will vary over time. At that point, the best
       solution will be to allocate large CRLEntry structures by modifying
       the DER decoding template. The extra space would be for next/prev
       pointers. This would allow entries from different CRLs to be mixed in
       the same hash table.
    */
    PLHashTable* entries;
    PreAllocator* prebuffer; /* big pre-allocated buffer mentioned above */
    PRBool sigChecked; /* this CRL signature has already been checked */
    PRBool sigValid; /* signature verification status .
                        Only meaningful if checked is PR_TRUE . */
    PRBool unbuildable; /* Avoid using assosiated CRL is it fails
                         * a decoding step */
};

/*  CRL distribution point cache object
    This is a cache of CRL entries for a given distribution point of an issuer
    It is built from a collection of one full and 0 or more delta CRLs.
*/

struct CRLDPCacheStr {
#ifdef DPC_RWLOCK
    NSSRWLock* lock;
#else
    PRLock* lock;
#endif
    CERTCertificate* issuer;    /* issuer cert
                                   XXX there may be multiple issuer certs,
                                       with different validity dates. Also
                                       need to deal with SKID/AKID . See
                                       bugzilla 217387, 233118 */
    SECItem* subject;           /* DER of issuer subject */
    SECItem* distributionPoint; /* DER of distribution point. This may be
                                   NULL when distribution points aren't
                                   in use (ie. the CA has a single CRL).
                                   Currently not used. */

    /* array of full CRLs matching this distribution point */
    PRUint32 ncrls;              /* total number of CRLs in crls */
    CachedCrl** crls;            /* array of all matching CRLs */
    /* XCRL With iCRLs and multiple DPs, the CRL can be shared accross several
       issuers. In the future, we'll need to globally recycle the CRL in a
       separate list in order to avoid extra lookups, decodes, and copies */

    /* pointers to good decoded CRLs used to build the cache */
    CachedCrl* selected;    /* full CRL selected for use in the cache */
#if 0
    /* for future use */
    PRInt32 numdeltas;      /* number of delta CRLs used for the cache */
    CachedCrl** deltas;     /* delta CRLs used for the cache */
#endif
    /* cache invalidity bitflag */
    PRUint16 invalid;       /* this state will be set if either
             CRL_CACHE_INVALID_CRLS or CRL_CACHE_LAST_FETCH_FAILED is set.
             In those cases, all certs are considered to have unknown status.
             The invalid state can only be cleared during an update if all
             error states are cleared */
    PRBool refresh;        /* manual refresh from tokens has been forced */
    PRBool mustchoose;     /* trigger reselection algorithm, for case when
                              RAM CRL objects are dropped from the cache */
    PRTime lastfetch;      /* time a CRL token fetch was last performed */
    PRTime lastcheck;      /* time CRL token objects were last checked for
                              existence */
};

/*  CRL issuer cache object
    This object tracks all the distribution point caches for a given issuer.
    XCRL once we support multiple issuing distribution points, this object
    will be a hash table. For now, it just holds the single CRL distribution
    point cache structure.
*/

struct CRLIssuerCacheStr {
    SECItem* subject;           /* DER of issuer subject */
    CRLDPCache* dpp;
#if 0
    /* XCRL for future use.
       We don't need to lock at the moment because we only have one DP,
       which gets created at the same time as this object */
    NSSRWLock* lock;
    CRLDPCache** dps;
    PLHashTable* distributionpoints;
    CERTCertificate* issuer;
#endif
};

/*  CRL revocation cache object
    This object tracks all the issuer caches
*/

struct CRLCacheStr {
#ifdef GLOBAL_RWLOCK
    NSSRWLock* lock;
#else
    PRLock* lock;
#endif
    /* hash table of issuer to CRLIssuerCacheStr,
       indexed by issuer DER subject */
    PLHashTable* issuers;
};

SECStatus InitCRLCache(void);
SECStatus ShutdownCRLCache(void);

/* Returns a pointer to an environment-like string, a series of
** null-terminated strings, terminated by a zero-length string.
** This function is intended to be internal to NSS.
*/
extern char * cert_GetCertificateEmailAddresses(CERTCertificate *cert);

/*
 * These functions are used to map subjectKeyID extension values to certs
 * and to keep track of the checks for user certificates in each slot
 */
SECStatus
cert_CreateSubjectKeyIDHashTable(void);

SECStatus
cert_AddSubjectKeyIDMapping(SECItem *subjKeyID, CERTCertificate *cert);

SECStatus
cert_UpdateSubjectKeyIDSlotCheck(SECItem *slotid, int series);

int
cert_SubjectKeyIDSlotCheckSeries(SECItem *slotid);

/*
 * Call this function to remove an entry from the mapping table.
 */
SECStatus
cert_RemoveSubjectKeyIDMapping(SECItem *subjKeyID);

SECStatus
cert_DestroySubjectKeyIDHashTable(void);

SECItem*
cert_FindDERCertBySubjectKeyID(SECItem *subjKeyID);

/* return maximum length of AVA value based on its type OID tag. */
extern int cert_AVAOidTagToMaxLen(SECOidTag tag);

/* Make an AVA, allocated from pool, from OID and DER encoded value */
extern CERTAVA * CERT_CreateAVAFromRaw(PRArenaPool *pool, 
                               const SECItem * OID, const SECItem * value);

/* Make an AVA from binary input specified by SECItem */
extern CERTAVA * CERT_CreateAVAFromSECItem(PRArenaPool *arena, SECOidTag kind, 
                                           int valueType, SECItem *value);

/*
 * get a DPCache object for the given issuer subject and dp
 * Automatically creates the cache object if it doesn't exist yet.
 */
SECStatus AcquireDPCache(CERTCertificate* issuer, const SECItem* subject,
                         const SECItem* dp, int64 t, void* wincx,
                         CRLDPCache** dpcache, PRBool* writeLocked);

/* check if a particular SN is in the CRL cache and return its entry */
dpcacheStatus DPCache_Lookup(CRLDPCache* cache, SECItem* sn,
                             CERTCrlEntry** returned);

/* release a DPCache object that was previously acquired */
void ReleaseDPCache(CRLDPCache* dpcache, PRBool writeLocked);

/*
 * map Stan errors into NSS errors
 * This function examines the stan error stack and automatically sets
 * PORT_SetError(); to the appropriate SEC_ERROR value.
 */
void CERT_MapStanError();

/* Interface function for libpkix cert validation engine:
 * cert_verify wrapper. */
SECStatus
cert_VerifyCertChainPkix(CERTCertificate *cert,
                         PRBool checkSig,
                         SECCertUsage     requiredUsage,
                         PRTime           time,
                         void            *wincx,
                         CERTVerifyLog   *log,
                         PRBool          *sigError,
                         PRBool          *revoked);

SECStatus cert_InitLocks(void);

SECStatus cert_DestroyLocks(void);

/*
 * fill in nsCertType field of the cert based on the cert extension
 */
extern SECStatus cert_GetCertType(CERTCertificate *cert);

/*
 * compute and return the value of nsCertType for cert, but do not 
 * update the CERTCertificate.
 */
extern PRUint32 cert_ComputeCertType(CERTCertificate *cert);

void cert_AddToVerifyLog(CERTVerifyLog *log,CERTCertificate *cert,
                         unsigned long errorCode, unsigned int depth,
                         void *arg);

/* Insert a DER CRL into the CRL cache, and take ownership of it.
 *
 * cert_CacheCRLByGeneralName takes ownership of the memory in crl argument
 * completely.  crl must be freeable by SECITEM_FreeItem. It will be freed
 * immediately if it is rejected from the CRL cache, or later during cache
 * updates when a new crl is available, or at shutdown time.
 *
 * canonicalizedName represents the source of the CRL, a GeneralName.
 * The format of the encoding is not restricted, but all callers of
 * cert_CacheCRLByGeneralName and cert_FindCRLByGeneralName must use
 * the same encoding. To facilitate X.500 name matching, a canonicalized
 * encoding of the GeneralName should be used, if available.
 */
 
SECStatus cert_CacheCRLByGeneralName(CERTCertDBHandle* dbhandle, SECItem* crl,
                                     const SECItem* canonicalizedName);

struct NamedCRLCacheStr {
    PRLock* lock;
    PLHashTable* entries;
};

/* NamedCRLCacheEntryStr is filled in by cert_CacheCRLByGeneralName,
 * and read by cert_FindCRLByGeneralName */
struct NamedCRLCacheEntryStr {
    SECItem* canonicalizedName;
    SECItem* crl;                   /* DER, kept only if CRL
                                     * is successfully cached */
    PRBool inCRLCache;
    PRTime successfulInsertionTime; /* insertion time */
    PRTime lastAttemptTime;         /* time of last call to
                              cert_CacheCRLByGeneralName with this name */
    PRBool badDER;      /* ASN.1 error */
    PRBool dupe;        /* matching DER CRL already in CRL cache */
    PRBool unsupported; /* IDP, delta, any other reason */
};

typedef enum {
    certRevocationStatusRevoked = 0,
    certRevocationStatusValid = 1,
    certRevocationStatusUnknown = 2
} CERTRevocationStatus;

/* Returns detailed status of the cert(revStatus variable). Tells if
 * issuer cache has OriginFetchedWithTimeout crl in it. */
SECStatus
cert_CheckCertRevocationStatus(CERTCertificate* cert, CERTCertificate* issuer,
                               const SECItem* dp, PRTime t, void *wincx,
                               CERTRevocationStatus *revStatus,
                               CERTCRLEntryReasonCode *revReason);


SECStatus cert_AcquireNamedCRLCache(NamedCRLCache** returned);

/* cert_FindCRLByGeneralName must be called only while the named cache is
 * acquired, and the entry is only valid until cache is released.
 */
SECStatus cert_FindCRLByGeneralName(NamedCRLCache* ncc,
                                    const SECItem* canonicalizedName,
                                    NamedCRLCacheEntry** retEntry);

SECStatus cert_ReleaseNamedCRLCache(NamedCRLCache* ncc);

/* This is private for now.  Maybe shoule be public. */
CERTGeneralName *
cert_GetSubjectAltNameList(CERTCertificate *cert, PRArenaPool *arena);

/* Count DNS names and IP addresses in a list of GeneralNames */
PRUint32
cert_CountDNSPatterns(CERTGeneralName *firstName);

/*
 * returns the trust status of the leaf certificate based on usage.
 * If the leaf is explicitly untrusted, this function will fail and 
 * failedFlags will be set to the trust bit value that lead to the failure.
 * If the leaf is trusted, isTrusted is set to true and the function returns 
 * SECSuccess. This function does not check if the cert is fit for a 
 * particular usage.
 */
SECStatus
cert_CheckLeafTrust(CERTCertificate *cert,
                    SECCertUsage usage, 
                    unsigned int *failedFlags,
                    PRBool *isTrusted);

#endif /* _CERTI_H_ */