crypto/rand/rand_vms.c

   1 /*
   2  * Copyright 2001-2018 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include "e_os.h"
  11
  12 #if defined(OPENSSL_SYS_VMS)
  13 # define __NEW_STARLET 1         /* New starlet definitions since VMS 7.0 */
  14 # include <unistd.h>
  15 # include "internal/cryptlib.h"
  16 # include <openssl/rand.h>
  17 # include "crypto/rand.h"
  18 # include "rand_lcl.h"
  19 # include <descrip.h>
  20 # include <dvidef.h>
  21 # include <jpidef.h>
  22 # include <rmidef.h>
  23 # include <syidef.h>
  24 # include <ssdef.h>
  25 # include <starlet.h>
  26 # include <efndef.h>
  27 # include <gen64def.h>
  28 # include <iosbdef.h>
  29 # include <iledef.h>
  30 # include <lib$routines.h>
  31 # ifdef __DECC
  32 #  pragma message disable DOLLARID
  33 # endif
  34
  35 # ifndef OPENSSL_RAND_SEED_OS
  36 #  error "Unsupported seeding method configured; must be os"
  37 # endif
  38
  39 /* We need to make sure we have the right size pointer in some cases */
  40 # if __INITIAL_POINTER_SIZE == 64
  41 #  pragma pointer_size save
  42 #  pragma pointer_size 32
  43 # endif
  44 typedef uint32_t *uint32_t__ptr32;
  45 # if __INITIAL_POINTER_SIZE == 64
  46 #  pragma pointer_size restore
  47 # endif
  48
  49 struct item_st {
  50     short length, code;         /* length is number of bytes */
  51 };
  52
  53 static const struct item_st DVI_item_data[] = {
  54     {4,   DVI$_ERRCNT},
  55     {4,   DVI$_REFCNT},
  56 };
  57
  58 static const struct item_st JPI_item_data[] = {
  59     {4,   JPI$_BUFIO},
  60     {4,   JPI$_CPUTIM},
  61     {4,   JPI$_DIRIO},
  62     {4,   JPI$_IMAGECOUNT},
  63     {4,   JPI$_PAGEFLTS},
  64     {4,   JPI$_PID},
  65     {4,   JPI$_PPGCNT},
  66     {4,   JPI$_WSPEAK},
  67     /*
  68      * Note: the direct result is just a 32-bit address.  However, it points
  69      * to a list of 4 32-bit words, so we make extra space for them so we can
  70      * do in-place replacement of values
  71      */
  72     {16,  JPI$_FINALEXC},
  73 };
  74
  75 static const struct item_st JPI_item_data_64bit[] = {
  76     {8,   JPI$_LAST_LOGIN_I},
  77     {8,   JPI$_LOGINTIM},
  78 };
  79
  80 static const struct item_st RMI_item_data[] = {
  81     {4,   RMI$_COLPG},
  82     {4,   RMI$_MWAIT},
  83     {4,   RMI$_CEF},
  84     {4,   RMI$_PFW},
  85     {4,   RMI$_LEF},
  86     {4,   RMI$_LEFO},
  87     {4,   RMI$_HIB},
  88     {4,   RMI$_HIBO},
  89     {4,   RMI$_SUSP},
  90     {4,   RMI$_SUSPO},
  91     {4,   RMI$_FPG},
  92     {4,   RMI$_COM},
  93     {4,   RMI$_COMO},
  94     {4,   RMI$_CUR},
  95 #if defined __alpha
  96     {4,   RMI$_FRLIST},
  97     {4,   RMI$_MODLIST},
  98 #endif
  99     {4,   RMI$_FAULTS},
 100     {4,   RMI$_PREADS},
 101     {4,   RMI$_PWRITES},
 102     {4,   RMI$_PWRITIO},
 103     {4,   RMI$_PREADIO},
 104     {4,   RMI$_GVALFLTS},
 105     {4,   RMI$_WRTINPROG},
 106     {4,   RMI$_FREFLTS},
 107     {4,   RMI$_DZROFLTS},
 108     {4,   RMI$_SYSFAULTS},
 109     {4,   RMI$_ISWPCNT},
 110     {4,   RMI$_DIRIO},
 111     {4,   RMI$_BUFIO},
 112     {4,   RMI$_MBREADS},
 113     {4,   RMI$_MBWRITES},
 114     {4,   RMI$_LOGNAM},
 115     {4,   RMI$_FCPCALLS},
 116     {4,   RMI$_FCPREAD},
 117     {4,   RMI$_FCPWRITE},
 118     {4,   RMI$_FCPCACHE},
 119     {4,   RMI$_FCPCPU},
 120     {4,   RMI$_FCPHIT},
 121     {4,   RMI$_FCPSPLIT},
 122     {4,   RMI$_FCPFAULT},
 123     {4,   RMI$_ENQNEW},
 124     {4,   RMI$_ENQCVT},
 125     {4,   RMI$_DEQ},
 126     {4,   RMI$_BLKAST},
 127     {4,   RMI$_ENQWAIT},
 128     {4,   RMI$_ENQNOTQD},
 129     {4,   RMI$_DLCKSRCH},
 130     {4,   RMI$_DLCKFND},
 131     {4,   RMI$_NUMLOCKS},
 132     {4,   RMI$_NUMRES},
 133     {4,   RMI$_ARRLOCPK},
 134     {4,   RMI$_DEPLOCPK},
 135     {4,   RMI$_ARRTRAPK},
 136     {4,   RMI$_TRCNGLOS},
 137     {4,   RMI$_RCVBUFFL},
 138     {4,   RMI$_ENQNEWLOC},
 139     {4,   RMI$_ENQNEWIN},
 140     {4,   RMI$_ENQNEWOUT},
 141     {4,   RMI$_ENQCVTLOC},
 142     {4,   RMI$_ENQCVTIN},
 143     {4,   RMI$_ENQCVTOUT},
 144     {4,   RMI$_DEQLOC},
 145     {4,   RMI$_DEQIN},
 146     {4,   RMI$_DEQOUT},
 147     {4,   RMI$_BLKLOC},
 148     {4,   RMI$_BLKIN},
 149     {4,   RMI$_BLKOUT},
 150     {4,   RMI$_DIRIN},
 151     {4,   RMI$_DIROUT},
 152     /* We currently get a fault when trying these.  TODO: To be figured out. */
 153 #if 0
 154     {140, RMI$_MSCP_EVERYTHING},   /* 35 32-bit words */
 155     {152, RMI$_DDTM_ALL},          /* 38 32-bit words */
 156     {80,  RMI$_TMSCP_EVERYTHING}   /* 20 32-bit words */
 157 #endif
 158     {4,   RMI$_LPZ_PAGCNT},
 159     {4,   RMI$_LPZ_HITS},
 160     {4,   RMI$_LPZ_MISSES},
 161     {4,   RMI$_LPZ_EXPCNT},
 162     {4,   RMI$_LPZ_ALLOCF},
 163     {4,   RMI$_LPZ_ALLOC2},
 164     {4,   RMI$_ACCESS},
 165     {4,   RMI$_ALLOC},
 166     {4,   RMI$_FCPCREATE},
 167     {4,   RMI$_VOLWAIT},
 168     {4,   RMI$_FCPTURN},
 169     {4,   RMI$_FCPERASE},
 170     {4,   RMI$_OPENS},
 171     {4,   RMI$_FIDHIT},
 172     {4,   RMI$_FIDMISS},
 173     {4,   RMI$_FILHDR_HIT},
 174     {4,   RMI$_DIRFCB_HIT},
 175     {4,   RMI$_DIRFCB_MISS},
 176     {4,   RMI$_DIRDATA_HIT},
 177     {4,   RMI$_EXTHIT},
 178     {4,   RMI$_EXTMISS},
 179     {4,   RMI$_QUOHIT},
 180     {4,   RMI$_QUOMISS},
 181     {4,   RMI$_STORAGMAP_HIT},
 182     {4,   RMI$_VOLLCK},
 183     {4,   RMI$_SYNCHLCK},
 184     {4,   RMI$_SYNCHWAIT},
 185     {4,   RMI$_ACCLCK},
 186     {4,   RMI$_XQPCACHEWAIT},
 187     {4,   RMI$_DIRDATA_MISS},
 188     {4,   RMI$_FILHDR_MISS},
 189     {4,   RMI$_STORAGMAP_MISS},
 190     {4,   RMI$_PROCCNTMAX},
 191     {4,   RMI$_PROCBATCNT},
 192     {4,   RMI$_PROCINTCNT},
 193     {4,   RMI$_PROCNETCNT},
 194     {4,   RMI$_PROCSWITCHCNT},
 195     {4,   RMI$_PROCBALSETCNT},
 196     {4,   RMI$_PROCLOADCNT},
 197     {4,   RMI$_BADFLTS},
 198     {4,   RMI$_EXEFAULTS},
 199     {4,   RMI$_HDRINSWAPS},
 200     {4,   RMI$_HDROUTSWAPS},
 201     {4,   RMI$_IOPAGCNT},
 202     {4,   RMI$_ISWPCNTPG},
 203     {4,   RMI$_OSWPCNT},
 204     {4,   RMI$_OSWPCNTPG},
 205     {4,   RMI$_RDFAULTS},
 206     {4,   RMI$_TRANSFLTS},
 207     {4,   RMI$_WRTFAULTS},
 208 #if defined __alpha
 209     {4,   RMI$_USERPAGES},
 210 #endif
 211     {4,   RMI$_VMSPAGES},
 212     {4,   RMI$_TTWRITES},
 213     {4,   RMI$_BUFOBJPAG},
 214     {4,   RMI$_BUFOBJPAGPEAK},
 215     {4,   RMI$_BUFOBJPAGS01},
 216     {4,   RMI$_BUFOBJPAGS2},
 217     {4,   RMI$_BUFOBJPAGMAXS01},
 218     {4,   RMI$_BUFOBJPAGMAXS2},
 219     {4,   RMI$_BUFOBJPAGPEAKS01},
 220     {4,   RMI$_BUFOBJPAGPEAKS2},
 221     {4,   RMI$_BUFOBJPGLTMAXS01},
 222     {4,   RMI$_BUFOBJPGLTMAXS2},
 223     {4,   RMI$_DLCK_INCMPLT},
 224     {4,   RMI$_DLCKMSGS_IN},
 225     {4,   RMI$_DLCKMSGS_OUT},
 226     {4,   RMI$_MCHKERRS},
 227     {4,   RMI$_MEMERRS},
 228 };
 229
 230 static const struct item_st RMI_item_data_64bit[] = {
 231 #if defined __ia64
 232     {8,   RMI$_FRLIST},
 233     {8,   RMI$_MODLIST},
 234 #endif
 235     {8,   RMI$_LCKMGR_REQCNT},
 236     {8,   RMI$_LCKMGR_REQTIME},
 237     {8,   RMI$_LCKMGR_SPINCNT},
 238     {8,   RMI$_LCKMGR_SPINTIME},
 239     {8,   RMI$_CPUINTSTK},
 240     {8,   RMI$_CPUMPSYNCH},
 241     {8,   RMI$_CPUKERNEL},
 242     {8,   RMI$_CPUEXEC},
 243     {8,   RMI$_CPUSUPER},
 244     {8,   RMI$_CPUUSER},
 245 #if defined __ia64
 246     {8,   RMI$_USERPAGES},
 247 #endif
 248     {8,   RMI$_TQETOTAL},
 249     {8,   RMI$_TQESYSUB},
 250     {8,   RMI$_TQEUSRTIMR},
 251     {8,   RMI$_TQEUSRWAKE},
 252 };
 253
 254 static const struct item_st SYI_item_data[] = {
 255     {4,   SYI$_PAGEFILE_FREE},
 256 };
 257
 258 /*
 259  * Input:
 260  * items_data           - an array of lengths and codes
 261  * items_data_num       - number of elements in that array
 262  *
 263  * Output:
 264  * items                - pre-allocated ILE3 array to be filled.
 265  *                        It's assumed to have items_data_num elements plus
 266  *                        one extra for the terminating NULL element
 267  * databuffer           - pre-allocated 32-bit word array.
 268  *
 269  * Returns the number of elements used in databuffer
 270  */
 271 static size_t prepare_item_list(const struct item_st *items_input,
 272                                 size_t items_input_num,
 273                                 ILE3 *items,
 274                                 uint32_t__ptr32 databuffer)
 275 {
 276     size_t data_sz = 0;
 277
 278     for (; items_input_num-- > 0; items_input++, items++) {
 279
 280         items->ile3$w_code = items_input->code;
 281         /* Special treatment of JPI$_FINALEXC */
 282         if (items->ile3$w_code == JPI$_FINALEXC)
 283             items->ile3$w_length = 4;
 284         else
 285             items->ile3$w_length = items_input->length;
 286
 287         items->ile3$ps_bufaddr = databuffer;
 288         items->ile3$ps_retlen_addr = 0;
 289
 290         databuffer += items_input->length / sizeof(databuffer[0]);
 291         data_sz += items_input->length;
 292     }
 293     /* Terminating NULL entry */
 294     items->ile3$w_length = items->ile3$w_code = 0;
 295     items->ile3$ps_bufaddr = items->ile3$ps_retlen_addr = NULL;
 296
 297     return data_sz / sizeof(databuffer[0]);
 298 }
 299
 300 static void massage_JPI(ILE3 *items)
 301 {
 302     /*
 303      * Special treatment of JPI$_FINALEXC
 304      * The result of that item's data buffer is a 32-bit address to a list of
 305      * 4 32-bit words.
 306      */
 307     for (; items->ile3$w_length != 0; items++) {
 308         if (items->ile3$w_code == JPI$_FINALEXC) {
 309             uint32_t *data = items->ile3$ps_bufaddr;
 310             uint32_t *ptr = (uint32_t *)*data;
 311             size_t j;
 312
 313             /*
 314              * We know we made space for 4 32-bit words, so we can do in-place
 315              * replacement.
 316              */
 317             for (j = 0; j < 4; j++)
 318                 data[j] = ptr[j];
 319
 320             break;
 321         }
 322     }
 323 }
 324
 325 /*
 326  * This number expresses how many bits of data contain 1 bit of entropy.
 327  *
 328  * For the moment, we assume about 0.05 entropy bits per data bit, or 1
 329  * bit of entropy per 20 data bits.
 330  */
 331 #define ENTROPY_FACTOR  20
 332
 333 size_t rand_pool_acquire_entropy(RAND_POOL *pool)
 334 {
 335     ILE3 JPI_items_64bit[OSSL_NELEM(JPI_item_data_64bit) + 1];
 336     ILE3 RMI_items_64bit[OSSL_NELEM(RMI_item_data_64bit) + 1];
 337     ILE3 DVI_items[OSSL_NELEM(DVI_item_data) + 1];
 338     ILE3 JPI_items[OSSL_NELEM(JPI_item_data) + 1];
 339     ILE3 RMI_items[OSSL_NELEM(RMI_item_data) + 1];
 340     ILE3 SYI_items[OSSL_NELEM(SYI_item_data) + 1];
 341     union {
 342         /* This ensures buffer starts at 64 bit boundary */
 343         uint64_t dummy;
 344         uint32_t buffer[OSSL_NELEM(JPI_item_data_64bit) * 2
 345                         + OSSL_NELEM(RMI_item_data_64bit) * 2
 346                         + OSSL_NELEM(DVI_item_data)
 347                         + OSSL_NELEM(JPI_item_data)
 348                         + OSSL_NELEM(RMI_item_data)
 349                         + OSSL_NELEM(SYI_item_data)
 350                         + 4 /* For JPI$_FINALEXC */];
 351     } data;
 352     size_t total_elems = 0;
 353     size_t total_length = 0;
 354     size_t bytes_needed = rand_pool_bytes_needed(pool, ENTROPY_FACTOR);
 355     size_t bytes_remaining = rand_pool_bytes_remaining(pool);
 356
 357     /* Take all the 64-bit items first, to ensure proper alignment of data */
 358     total_elems +=
 359         prepare_item_list(JPI_item_data_64bit, OSSL_NELEM(JPI_item_data_64bit),
 360                           JPI_items_64bit, &data.buffer[total_elems]);
 361     total_elems +=
 362         prepare_item_list(RMI_item_data_64bit, OSSL_NELEM(RMI_item_data_64bit),
 363                           RMI_items_64bit, &data.buffer[total_elems]);
 364     /* Now the 32-bit items */
 365     total_elems += prepare_item_list(DVI_item_data, OSSL_NELEM(DVI_item_data),
 366                                      DVI_items, &data.buffer[total_elems]);
 367     total_elems += prepare_item_list(JPI_item_data, OSSL_NELEM(JPI_item_data),
 368                                      JPI_items, &data.buffer[total_elems]);
 369     total_elems += prepare_item_list(RMI_item_data, OSSL_NELEM(RMI_item_data),
 370                                      RMI_items, &data.buffer[total_elems]);
 371     total_elems += prepare_item_list(SYI_item_data, OSSL_NELEM(SYI_item_data),
 372                                      SYI_items, &data.buffer[total_elems]);
 373     total_length = total_elems * sizeof(data.buffer[0]);
 374
 375     /* Fill data.buffer with various info bits from this process */
 376     {
 377         uint32_t status;
 378         uint32_t efn;
 379         IOSB iosb;
 380         $DESCRIPTOR(SYSDEVICE,"SYS$SYSDEVICE:");
 381
 382         if ((status = sys$getdviw(EFN$C_ENF, 0, &SYSDEVICE, DVI_items,
 383                                   0, 0, 0, 0, 0)) != SS$_NORMAL) {
 384             lib$signal(status);
 385             return 0;
 386         }
 387         if ((status = sys$getjpiw(EFN$C_ENF, 0, 0, JPI_items_64bit, 0, 0, 0))
 388             != SS$_NORMAL) {
 389             lib$signal(status);
 390             return 0;
 391         }
 392         if ((status = sys$getjpiw(EFN$C_ENF, 0, 0, JPI_items, 0, 0, 0))
 393             != SS$_NORMAL) {
 394             lib$signal(status);
 395             return 0;
 396         }
 397         if ((status = sys$getsyiw(EFN$C_ENF, 0, 0, SYI_items, 0, 0, 0))
 398             != SS$_NORMAL) {
 399             lib$signal(status);
 400             return 0;
 401         }
 402         /*
 403          * The RMI service is a bit special, as there is no synchronous
 404          * variant, so we MUST create an event flag to synchronise on.
 405          */
 406         if ((status = lib$get_ef(&efn)) != SS$_NORMAL) {
 407             lib$signal(status);
 408             return 0;
 409         }
 410         if ((status = sys$getrmi(efn, 0, 0, RMI_items_64bit, &iosb, 0, 0))
 411             != SS$_NORMAL) {
 412             lib$signal(status);
 413             return 0;
 414         }
 415         if ((status = sys$synch(efn, &iosb)) != SS$_NORMAL) {
 416             lib$signal(status);
 417             return 0;
 418         }
 419         if (iosb.iosb$l_getxxi_status != SS$_NORMAL) {
 420             lib$signal(iosb.iosb$l_getxxi_status);
 421             return 0;
 422         }
 423         if ((status = sys$getrmi(efn, 0, 0, RMI_items, &iosb, 0, 0))
 424             != SS$_NORMAL) {
 425             lib$signal(status);
 426             return 0;
 427         }
 428         if ((status = sys$synch(efn, &iosb)) != SS$_NORMAL) {
 429             lib$signal(status);
 430             return 0;
 431         }
 432         if (iosb.iosb$l_getxxi_status != SS$_NORMAL) {
 433             lib$signal(iosb.iosb$l_getxxi_status);
 434             return 0;
 435         }
 436         if ((status = lib$free_ef(&efn)) != SS$_NORMAL) {
 437             lib$signal(status);
 438             return 0;
 439         }
 440     }
 441
 442     massage_JPI(JPI_items);
 443
 444     /*
 445      * If we can't feed the requirements from the caller, we're in deep trouble.
 446      */
 447     if (!ossl_assert(total_length >= bytes_needed)) {
 448         char neededstr[20];
 449         char availablestr[20];
 450
 451         BIO_snprintf(neededstr, sizeof(neededstr), "%zu", bytes_needed);
 452         BIO_snprintf(availablestr, sizeof(availablestr), "%zu", total_length);
 453         RANDerr(RAND_F_RAND_POOL_ACQUIRE_ENTROPY,
 454                 RAND_R_RANDOM_POOL_UNDERFLOW);
 455         ERR_add_error_data(4, "Needed: ", neededstr, ", Available: ",
 456                            availablestr);
 457         return 0;
 458     }
 459
 460     /*
 461      * Try not to overfeed the pool
 462      */
 463     if (total_length > bytes_remaining)
 464         total_length = bytes_remaining;
 465
 466     /* We give the pessimistic value for the amount of entropy */
 467     rand_pool_add(pool, (unsigned char *)data.buffer, total_length,
 468                   8 * total_length / ENTROPY_FACTOR);
 469     return rand_pool_entropy_available(pool);
 470 }
 471
 472 int rand_pool_add_nonce_data(RAND_POOL *pool)
 473 {
 474     struct {
 475         pid_t pid;
 476         CRYPTO_THREAD_ID tid;
 477         uint64_t time;
 478     } data;
 479
 480     /* Erase the entire structure including any padding */
 481     memset(&data, 0, sizeof(data));
 482
 483     /*
 484      * Add process id, thread id, and a high resolution timestamp
 485      * (where available, which is OpenVMS v8.4 and up) to ensure that
 486      * the nonce is unique whith high probability for different process
 487      * instances.
 488      */
 489     data.pid = getpid();
 490     data.tid = CRYPTO_THREAD_get_current_id();
 491 #if __CRTL_VER >= 80400000
 492     sys$gettim_prec(&data.time);
 493 #else
 494     sys$gettim((void*)&data.time);
 495 #endif
 496
 497     return rand_pool_add(pool, (unsigned char *)&data, sizeof(data), 0);
 498 }
 499
 500 int rand_pool_add_additional_data(RAND_POOL *pool)
 501 {
 502     struct {
 503         CRYPTO_THREAD_ID tid;
 504         uint64_t time;
 505     } data;
 506
 507     /* Erase the entire structure including any padding */
 508     memset(&data, 0, sizeof(data));
 509
 510     /*
 511      * Add some noise from the thread id and a high resolution timer.
 512      * The thread id adds a little randomness if the drbg is accessed
 513      * concurrently (which is the case for the <master> drbg).
 514      */
 515     data.tid = CRYPTO_THREAD_get_current_id();
 516 #if __CRTL_VER >= 80400000
 517     sys$gettim_prec(&data.time);
 518 #else
 519     sys$gettim((void*)&data.time);
 520 #endif
 521
 522     return rand_pool_add(pool, (unsigned char *)&data, sizeof(data), 0);
 523 }
 524
 525 int rand_pool_init(void)
 526 {
 527     return 1;
 528 }
 529
 530 void rand_pool_cleanup(void)
 531 {
 532 }
 533
 534 void rand_pool_keep_random_devices_open(int keep)
 535 {
 536 }
 537
 538 #endif