/*
- * Copyright 2001-2016 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 2001-2018 The OpenSSL Project Authors. All Rights Reserved.
*
- * Licensed under the OpenSSL license (the "License"). You may not use
+ * Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
-/*
- * Modified by VMS Software, Inc (2016)
- * Eliminate looping through all processes (performance)
- * Add additional randomizations using rand() function
- */
+#include "e_os.h"
+#define __NEW_STARLET 1 /* New starlet definitions since VMS 7.0 */
+#include <unistd.h>
+#include "internal/cryptlib.h"
#include <openssl/rand.h>
-#include "rand_lcl.h"
-
-#if defined(OPENSSL_SYS_VMS)
-# include <descrip.h>
-# include <jpidef.h>
-# include <ssdef.h>
-# include <starlet.h>
-# include <efndef>
-# ifdef __DECC
-# pragma message disable DOLLARID
-# endif
+#include "crypto/rand.h"
+#include "rand_local.h"
+#include <descrip.h>
+#include <dvidef.h>
+#include <jpidef.h>
+#include <rmidef.h>
+#include <syidef.h>
+#include <ssdef.h>
+#include <starlet.h>
+#include <efndef.h>
+#include <gen64def.h>
+#include <iosbdef.h>
+#include <iledef.h>
+#include <lib$routines.h>
+#ifdef __DECC
+# pragma message disable DOLLARID
+#endif
+
+#include <dlfcn.h> /* SYS$GET_ENTROPY presence */
+
+#ifndef OPENSSL_RAND_SEED_OS
+# error "Unsupported seeding method configured; must be os"
+#endif
/*
- * Use 32-bit pointers almost everywhere. Define the type to which to cast a
- * pointer passed to an external function.
+ * DATA COLLECTION METHOD
+ * ======================
+ *
+ * This is a method to get low quality entropy.
+ * It works by collecting all kinds of statistical data that
+ * VMS offers and using them as random seed.
*/
-# if __INITIAL_POINTER_SIZE == 64
-# define PTR_T __void_ptr64
-# pragma pointer_size save
-# pragma pointer_size 32
-# else /* __INITIAL_POINTER_SIZE == 64 */
-# define PTR_T void *
-# endif /* __INITIAL_POINTER_SIZE == 64 [else] */
-
-static struct items_data_st {
+
+/* We need to make sure we have the right size pointer in some cases */
+#if __INITIAL_POINTER_SIZE == 64
+# pragma pointer_size save
+# pragma pointer_size 32
+#endif
+typedef uint32_t *uint32_t__ptr32;
+#if __INITIAL_POINTER_SIZE == 64
+# pragma pointer_size restore
+#endif
+
+struct item_st {
short length, code; /* length is number of bytes */
-} items_data[] = {
- {4, JPI$_BUFIO},
- {4, JPI$_CPUTIM},
- {4, JPI$_DIRIO},
- {4, JPI$_IMAGECOUNT},
- {8, JPI$_LAST_LOGIN_I},
- {8, JPI$_LOGINTIM},
- {4, JPI$_PAGEFLTS},
- {4, JPI$_PID},
- {4, JPI$_PPGCNT},
- {4, JPI$_WSPEAK},
- {4, JPI$_FINALEXC},
- {0, 0} /* zero terminated */
};
-int RAND_poll(void)
+static const struct item_st DVI_item_data[] = {
+ {4, DVI$_ERRCNT},
+ {4, DVI$_REFCNT},
+};
+
+static const struct item_st JPI_item_data[] = {
+ {4, JPI$_BUFIO},
+ {4, JPI$_CPUTIM},
+ {4, JPI$_DIRIO},
+ {4, JPI$_IMAGECOUNT},
+ {4, JPI$_PAGEFLTS},
+ {4, JPI$_PID},
+ {4, JPI$_PPGCNT},
+ {4, JPI$_WSPEAK},
+ /*
+ * Note: the direct result is just a 32-bit address. However, it points
+ * to a list of 4 32-bit words, so we make extra space for them so we can
+ * do in-place replacement of values
+ */
+ {16, JPI$_FINALEXC},
+};
+
+static const struct item_st JPI_item_data_64bit[] = {
+ {8, JPI$_LAST_LOGIN_I},
+ {8, JPI$_LOGINTIM},
+};
+
+static const struct item_st RMI_item_data[] = {
+ {4, RMI$_COLPG},
+ {4, RMI$_MWAIT},
+ {4, RMI$_CEF},
+ {4, RMI$_PFW},
+ {4, RMI$_LEF},
+ {4, RMI$_LEFO},
+ {4, RMI$_HIB},
+ {4, RMI$_HIBO},
+ {4, RMI$_SUSP},
+ {4, RMI$_SUSPO},
+ {4, RMI$_FPG},
+ {4, RMI$_COM},
+ {4, RMI$_COMO},
+ {4, RMI$_CUR},
+#if defined __alpha
+ {4, RMI$_FRLIST},
+ {4, RMI$_MODLIST},
+#endif
+ {4, RMI$_FAULTS},
+ {4, RMI$_PREADS},
+ {4, RMI$_PWRITES},
+ {4, RMI$_PWRITIO},
+ {4, RMI$_PREADIO},
+ {4, RMI$_GVALFLTS},
+ {4, RMI$_WRTINPROG},
+ {4, RMI$_FREFLTS},
+ {4, RMI$_DZROFLTS},
+ {4, RMI$_SYSFAULTS},
+ {4, RMI$_ISWPCNT},
+ {4, RMI$_DIRIO},
+ {4, RMI$_BUFIO},
+ {4, RMI$_MBREADS},
+ {4, RMI$_MBWRITES},
+ {4, RMI$_LOGNAM},
+ {4, RMI$_FCPCALLS},
+ {4, RMI$_FCPREAD},
+ {4, RMI$_FCPWRITE},
+ {4, RMI$_FCPCACHE},
+ {4, RMI$_FCPCPU},
+ {4, RMI$_FCPHIT},
+ {4, RMI$_FCPSPLIT},
+ {4, RMI$_FCPFAULT},
+ {4, RMI$_ENQNEW},
+ {4, RMI$_ENQCVT},
+ {4, RMI$_DEQ},
+ {4, RMI$_BLKAST},
+ {4, RMI$_ENQWAIT},
+ {4, RMI$_ENQNOTQD},
+ {4, RMI$_DLCKSRCH},
+ {4, RMI$_DLCKFND},
+ {4, RMI$_NUMLOCKS},
+ {4, RMI$_NUMRES},
+ {4, RMI$_ARRLOCPK},
+ {4, RMI$_DEPLOCPK},
+ {4, RMI$_ARRTRAPK},
+ {4, RMI$_TRCNGLOS},
+ {4, RMI$_RCVBUFFL},
+ {4, RMI$_ENQNEWLOC},
+ {4, RMI$_ENQNEWIN},
+ {4, RMI$_ENQNEWOUT},
+ {4, RMI$_ENQCVTLOC},
+ {4, RMI$_ENQCVTIN},
+ {4, RMI$_ENQCVTOUT},
+ {4, RMI$_DEQLOC},
+ {4, RMI$_DEQIN},
+ {4, RMI$_DEQOUT},
+ {4, RMI$_BLKLOC},
+ {4, RMI$_BLKIN},
+ {4, RMI$_BLKOUT},
+ {4, RMI$_DIRIN},
+ {4, RMI$_DIROUT},
+ /* We currently get a fault when trying these. TODO: To be figured out. */
+#if 0
+ {140, RMI$_MSCP_EVERYTHING}, /* 35 32-bit words */
+ {152, RMI$_DDTM_ALL}, /* 38 32-bit words */
+ {80, RMI$_TMSCP_EVERYTHING} /* 20 32-bit words */
+#endif
+ {4, RMI$_LPZ_PAGCNT},
+ {4, RMI$_LPZ_HITS},
+ {4, RMI$_LPZ_MISSES},
+ {4, RMI$_LPZ_EXPCNT},
+ {4, RMI$_LPZ_ALLOCF},
+ {4, RMI$_LPZ_ALLOC2},
+ {4, RMI$_ACCESS},
+ {4, RMI$_ALLOC},
+ {4, RMI$_FCPCREATE},
+ {4, RMI$_VOLWAIT},
+ {4, RMI$_FCPTURN},
+ {4, RMI$_FCPERASE},
+ {4, RMI$_OPENS},
+ {4, RMI$_FIDHIT},
+ {4, RMI$_FIDMISS},
+ {4, RMI$_FILHDR_HIT},
+ {4, RMI$_DIRFCB_HIT},
+ {4, RMI$_DIRFCB_MISS},
+ {4, RMI$_DIRDATA_HIT},
+ {4, RMI$_EXTHIT},
+ {4, RMI$_EXTMISS},
+ {4, RMI$_QUOHIT},
+ {4, RMI$_QUOMISS},
+ {4, RMI$_STORAGMAP_HIT},
+ {4, RMI$_VOLLCK},
+ {4, RMI$_SYNCHLCK},
+ {4, RMI$_SYNCHWAIT},
+ {4, RMI$_ACCLCK},
+ {4, RMI$_XQPCACHEWAIT},
+ {4, RMI$_DIRDATA_MISS},
+ {4, RMI$_FILHDR_MISS},
+ {4, RMI$_STORAGMAP_MISS},
+ {4, RMI$_PROCCNTMAX},
+ {4, RMI$_PROCBATCNT},
+ {4, RMI$_PROCINTCNT},
+ {4, RMI$_PROCNETCNT},
+ {4, RMI$_PROCSWITCHCNT},
+ {4, RMI$_PROCBALSETCNT},
+ {4, RMI$_PROCLOADCNT},
+ {4, RMI$_BADFLTS},
+ {4, RMI$_EXEFAULTS},
+ {4, RMI$_HDRINSWAPS},
+ {4, RMI$_HDROUTSWAPS},
+ {4, RMI$_IOPAGCNT},
+ {4, RMI$_ISWPCNTPG},
+ {4, RMI$_OSWPCNT},
+ {4, RMI$_OSWPCNTPG},
+ {4, RMI$_RDFAULTS},
+ {4, RMI$_TRANSFLTS},
+ {4, RMI$_WRTFAULTS},
+#if defined __alpha
+ {4, RMI$_USERPAGES},
+#endif
+ {4, RMI$_VMSPAGES},
+ {4, RMI$_TTWRITES},
+ {4, RMI$_BUFOBJPAG},
+ {4, RMI$_BUFOBJPAGPEAK},
+ {4, RMI$_BUFOBJPAGS01},
+ {4, RMI$_BUFOBJPAGS2},
+ {4, RMI$_BUFOBJPAGMAXS01},
+ {4, RMI$_BUFOBJPAGMAXS2},
+ {4, RMI$_BUFOBJPAGPEAKS01},
+ {4, RMI$_BUFOBJPAGPEAKS2},
+ {4, RMI$_BUFOBJPGLTMAXS01},
+ {4, RMI$_BUFOBJPGLTMAXS2},
+ {4, RMI$_DLCK_INCMPLT},
+ {4, RMI$_DLCKMSGS_IN},
+ {4, RMI$_DLCKMSGS_OUT},
+ {4, RMI$_MCHKERRS},
+ {4, RMI$_MEMERRS},
+};
+
+static const struct item_st RMI_item_data_64bit[] = {
+#if defined __ia64
+ {8, RMI$_FRLIST},
+ {8, RMI$_MODLIST},
+#endif
+ {8, RMI$_LCKMGR_REQCNT},
+ {8, RMI$_LCKMGR_REQTIME},
+ {8, RMI$_LCKMGR_SPINCNT},
+ {8, RMI$_LCKMGR_SPINTIME},
+ {8, RMI$_CPUINTSTK},
+ {8, RMI$_CPUMPSYNCH},
+ {8, RMI$_CPUKERNEL},
+ {8, RMI$_CPUEXEC},
+ {8, RMI$_CPUSUPER},
+ {8, RMI$_CPUUSER},
+#if defined __ia64
+ {8, RMI$_USERPAGES},
+#endif
+ {8, RMI$_TQETOTAL},
+ {8, RMI$_TQESYSUB},
+ {8, RMI$_TQEUSRTIMR},
+ {8, RMI$_TQEUSRWAKE},
+};
+
+static const struct item_st SYI_item_data[] = {
+ {4, SYI$_PAGEFILE_FREE},
+};
+
+/*
+ * Input:
+ * items_data - an array of lengths and codes
+ * items_data_num - number of elements in that array
+ *
+ * Output:
+ * items - pre-allocated ILE3 array to be filled.
+ * It's assumed to have items_data_num elements plus
+ * one extra for the terminating NULL element
+ * databuffer - pre-allocated 32-bit word array.
+ *
+ * Returns the number of elements used in databuffer
+ */
+static size_t prepare_item_list(const struct item_st *items_input,
+ size_t items_input_num,
+ ILE3 *items,
+ uint32_t__ptr32 databuffer)
{
+ size_t data_sz = 0;
- /* determine the number of items in the JPI array */
+ for (; items_input_num-- > 0; items_input++, items++) {
- struct items_data_st item_entry;
- int item_entry_count = sizeof(items_data)/sizeof(item_entry);
+ items->ile3$w_code = items_input->code;
+ /* Special treatment of JPI$_FINALEXC */
+ if (items->ile3$w_code == JPI$_FINALEXC)
+ items->ile3$w_length = 4;
+ else
+ items->ile3$w_length = items_input->length;
- /* Create the JPI itemlist array to hold item_data content */
+ items->ile3$ps_bufaddr = databuffer;
+ items->ile3$ps_retlen_addr = 0;
- struct {
- short length, code;
- int *buffer;
- int *retlen;
- } item[item_entry_count], *pitem; /* number of entries in items_data */
-
- struct items_data_st *pitems_data;
- int data_buffer[(item_entry_count*2)+4]; /* 8 bytes per entry max */
- int iosb[2];
- int sys_time[2];
- int *ptr;
- int i, j ;
- int tmp_length = 0;
- int total_length = 0;
-
- pitems_data = items_data;
- pitem = item;
-
-
- /* Setup itemlist for GETJPI */
- while (pitems_data->length) {
- pitem->length = pitems_data->length;
- pitem->code = pitems_data->code;
- pitem->buffer = &data_buffer[total_length];
- pitem->retlen = 0;
- /* total_length is in longwords */
- total_length += pitems_data->length/4;
- pitems_data++;
- pitem ++;
+ databuffer += items_input->length / sizeof(databuffer[0]);
+ data_sz += items_input->length;
}
- pitem->length = pitem->code = 0;
-
- /* Fill data_buffer with various info bits from this process */
- /* and twist that data to seed the SSL random number init */
-
- if (sys$getjpiw(EFN$C_ENF, NULL, NULL, item, &iosb, 0, 0) == SS$_NORMAL) {
- for (i = 0; i < total_length; i++) {
- sys$gettim((struct _generic_64 *)&sys_time[0]);
- srand(sys_time[0] * data_buffer[0] * data_buffer[1] + i);
-
- if (i == (total_length - 1)) { /* for JPI$_FINALEXC */
- ptr = &data_buffer[i];
- for (j = 0; j < 4; j++) {
- data_buffer[i + j] = ptr[j];
- /* OK to use rand() just to scramble the seed */
- data_buffer[i + j] ^= (sys_time[0] ^ rand());
- tmp_length++;
- }
- } else {
- /* OK to use rand() just to scramble the seed */
- data_buffer[i] ^= (sys_time[0] ^ rand());
- }
+ /* Terminating NULL entry */
+ items->ile3$w_length = items->ile3$w_code = 0;
+ items->ile3$ps_bufaddr = items->ile3$ps_retlen_addr = NULL;
+
+ return data_sz / sizeof(databuffer[0]);
+}
+
+static void massage_JPI(ILE3 *items)
+{
+ /*
+ * Special treatment of JPI$_FINALEXC
+ * The result of that item's data buffer is a 32-bit address to a list of
+ * 4 32-bit words.
+ */
+ for (; items->ile3$w_length != 0; items++) {
+ if (items->ile3$w_code == JPI$_FINALEXC) {
+ uint32_t *data = items->ile3$ps_bufaddr;
+ uint32_t *ptr = (uint32_t *)*data;
+ size_t j;
+
+ /*
+ * We know we made space for 4 32-bit words, so we can do in-place
+ * replacement.
+ */
+ for (j = 0; j < 4; j++)
+ data[j] = ptr[j];
+
+ break;
+ }
+ }
+}
+
+/*
+ * This number expresses how many bits of data contain 1 bit of entropy.
+ *
+ * For the moment, we assume about 0.05 entropy bits per data bit, or 1
+ * bit of entropy per 20 data bits.
+ */
+#define ENTROPY_FACTOR 20
+
+size_t data_collect_method(RAND_POOL *pool)
+{
+ ILE3 JPI_items_64bit[OSSL_NELEM(JPI_item_data_64bit) + 1];
+ ILE3 RMI_items_64bit[OSSL_NELEM(RMI_item_data_64bit) + 1];
+ ILE3 DVI_items[OSSL_NELEM(DVI_item_data) + 1];
+ ILE3 JPI_items[OSSL_NELEM(JPI_item_data) + 1];
+ ILE3 RMI_items[OSSL_NELEM(RMI_item_data) + 1];
+ ILE3 SYI_items[OSSL_NELEM(SYI_item_data) + 1];
+ union {
+ /* This ensures buffer starts at 64 bit boundary */
+ uint64_t dummy;
+ uint32_t buffer[OSSL_NELEM(JPI_item_data_64bit) * 2
+ + OSSL_NELEM(RMI_item_data_64bit) * 2
+ + OSSL_NELEM(DVI_item_data)
+ + OSSL_NELEM(JPI_item_data)
+ + OSSL_NELEM(RMI_item_data)
+ + OSSL_NELEM(SYI_item_data)
+ + 4 /* For JPI$_FINALEXC */];
+ } data;
+ size_t total_elems = 0;
+ size_t total_length = 0;
+ size_t bytes_needed = rand_pool_bytes_needed(pool, ENTROPY_FACTOR);
+ size_t bytes_remaining = rand_pool_bytes_remaining(pool);
+
+ /* Take all the 64-bit items first, to ensure proper alignment of data */
+ total_elems +=
+ prepare_item_list(JPI_item_data_64bit, OSSL_NELEM(JPI_item_data_64bit),
+ JPI_items_64bit, &data.buffer[total_elems]);
+ total_elems +=
+ prepare_item_list(RMI_item_data_64bit, OSSL_NELEM(RMI_item_data_64bit),
+ RMI_items_64bit, &data.buffer[total_elems]);
+ /* Now the 32-bit items */
+ total_elems += prepare_item_list(DVI_item_data, OSSL_NELEM(DVI_item_data),
+ DVI_items, &data.buffer[total_elems]);
+ total_elems += prepare_item_list(JPI_item_data, OSSL_NELEM(JPI_item_data),
+ JPI_items, &data.buffer[total_elems]);
+ total_elems += prepare_item_list(RMI_item_data, OSSL_NELEM(RMI_item_data),
+ RMI_items, &data.buffer[total_elems]);
+ total_elems += prepare_item_list(SYI_item_data, OSSL_NELEM(SYI_item_data),
+ SYI_items, &data.buffer[total_elems]);
+ total_length = total_elems * sizeof(data.buffer[0]);
+
+ /* Fill data.buffer with various info bits from this process */
+ {
+ uint32_t status;
+ uint32_t efn;
+ IOSB iosb;
+ $DESCRIPTOR(SYSDEVICE,"SYS$SYSDEVICE:");
+
+ if ((status = sys$getdviw(EFN$C_ENF, 0, &SYSDEVICE, DVI_items,
+ 0, 0, 0, 0, 0)) != SS$_NORMAL) {
+ lib$signal(status);
+ return 0;
+ }
+ if ((status = sys$getjpiw(EFN$C_ENF, 0, 0, JPI_items_64bit, 0, 0, 0))
+ != SS$_NORMAL) {
+ lib$signal(status);
+ return 0;
+ }
+ if ((status = sys$getjpiw(EFN$C_ENF, 0, 0, JPI_items, 0, 0, 0))
+ != SS$_NORMAL) {
+ lib$signal(status);
+ return 0;
+ }
+ if ((status = sys$getsyiw(EFN$C_ENF, 0, 0, SYI_items, 0, 0, 0))
+ != SS$_NORMAL) {
+ lib$signal(status);
+ return 0;
+ }
+ /*
+ * The RMI service is a bit special, as there is no synchronous
+ * variant, so we MUST create an event flag to synchronise on.
+ */
+ if ((status = lib$get_ef(&efn)) != SS$_NORMAL) {
+ lib$signal(status);
+ return 0;
+ }
+ if ((status = sys$getrmi(efn, 0, 0, RMI_items_64bit, &iosb, 0, 0))
+ != SS$_NORMAL) {
+ lib$signal(status);
+ return 0;
+ }
+ if ((status = sys$synch(efn, &iosb)) != SS$_NORMAL) {
+ lib$signal(status);
+ return 0;
+ }
+ if (iosb.iosb$l_getxxi_status != SS$_NORMAL) {
+ lib$signal(iosb.iosb$l_getxxi_status);
+ return 0;
}
+ if ((status = sys$getrmi(efn, 0, 0, RMI_items, &iosb, 0, 0))
+ != SS$_NORMAL) {
+ lib$signal(status);
+ return 0;
+ }
+ if ((status = sys$synch(efn, &iosb)) != SS$_NORMAL) {
+ lib$signal(status);
+ return 0;
+ }
+ if (iosb.iosb$l_getxxi_status != SS$_NORMAL) {
+ lib$signal(iosb.iosb$l_getxxi_status);
+ return 0;
+ }
+ if ((status = lib$free_ef(&efn)) != SS$_NORMAL) {
+ lib$signal(status);
+ return 0;
+ }
+ }
- total_length += (tmp_length - 1);
+ massage_JPI(JPI_items);
- /* size of seed is total_length*4 bytes (64bytes) */
- RAND_add((PTR_T) data_buffer, total_length*4, total_length * 2);
- } else {
+ /*
+ * If we can't feed the requirements from the caller, we're in deep trouble.
+ */
+ if (!ossl_assert(total_length >= bytes_needed)) {
+ ERR_raise_data(ERR_LIB_RAND, RAND_R_RANDOM_POOL_UNDERFLOW,
+ "Needed: %zu, Available: %zu",
+ bytes_needed, total_length);
return 0;
}
- return 1;
+ /*
+ * Try not to overfeed the pool
+ */
+ if (total_length > bytes_remaining)
+ total_length = bytes_remaining;
+
+ /* We give the pessimistic value for the amount of entropy */
+ rand_pool_add(pool, (unsigned char *)data.buffer, total_length,
+ 8 * total_length / ENTROPY_FACTOR);
+ return rand_pool_entropy_available(pool);
+}
+
+int rand_pool_add_nonce_data(RAND_POOL *pool)
+{
+ struct {
+ pid_t pid;
+ CRYPTO_THREAD_ID tid;
+ uint64_t time;
+ } data;
+
+ /* Erase the entire structure including any padding */
+ memset(&data, 0, sizeof(data));
+
+ /*
+ * Add process id, thread id, and a high resolution timestamp
+ * (where available, which is OpenVMS v8.4 and up) to ensure that
+ * the nonce is unique with high probability for different process
+ * instances.
+ */
+ data.pid = getpid();
+ data.tid = CRYPTO_THREAD_get_current_id();
+#if __CRTL_VER >= 80400000
+ sys$gettim_prec(&data.time);
+#else
+ sys$gettim((void*)&data.time);
+#endif
+
+ return rand_pool_add(pool, (unsigned char *)&data, sizeof(data), 0);
+}
+
+/*
+ * SYS$GET_ENTROPY METHOD
+ * ======================
+ *
+ * This is a high entropy method based on a new system service that is
+ * based on getentropy() from FreeBSD 12. It's only used if available,
+ * and its availability is detected at run-time.
+ *
+ * We assume that this function provides full entropy random output.
+ */
+#define PUBLIC_VECTORS "SYS$LIBRARY:SYS$PUBLIC_VECTORS.EXE"
+#define GET_ENTROPY "SYS$GET_ENTROPY"
+
+static int get_entropy_address_flag = 0;
+static int (*get_entropy_address)(void *buffer, size_t buffer_size) = NULL;
+static int init_get_entropy_address(void)
+{
+ if (get_entropy_address_flag == 0)
+ get_entropy_address = dlsym(dlopen(PUBLIC_VECTORS, 0), GET_ENTROPY);
+ get_entropy_address_flag = 1;
+ return get_entropy_address != NULL;
+}
+
+size_t get_entropy_method(RAND_POOL *pool)
+{
+ /*
+ * The documentation says that SYS$GET_ENTROPY will give a maximum of
+ * 256 bytes of data.
+ */
+ unsigned char buffer[256];
+ size_t bytes_needed;
+ size_t bytes_to_get = 0;
+ uint32_t status;
+
+ for (bytes_needed = rand_pool_bytes_needed(pool, 1);
+ bytes_needed > 0;
+ bytes_needed -= bytes_to_get) {
+ bytes_to_get =
+ bytes_needed > sizeof(buffer) ? sizeof(buffer) : bytes_needed;
+
+ status = get_entropy_address(buffer, bytes_to_get);
+ if (status == SS$_RETRY) {
+ /* Set to zero so the loop doesn't diminish |bytes_needed| */
+ bytes_to_get = 0;
+ /* Should sleep some amount of time */
+ continue;
+ }
+
+ if (status != SS$_NORMAL) {
+ lib$signal(status);
+ return 0;
+ }
+
+ rand_pool_add(pool, buffer, bytes_to_get, 8 * bytes_to_get);
+ }
+
+ return rand_pool_entropy_available(pool);
}
+/*
+ * MAIN ENTROPY ACQUISITION FUNCTIONS
+ * ==================================
+ *
+ * These functions are called by the RAND / DRBG functions
+ */
+
+size_t rand_pool_acquire_entropy(RAND_POOL *pool)
+{
+ if (init_get_entropy_address())
+ return get_entropy_method(pool);
+ return data_collect_method(pool);
+}
+
+
+int rand_pool_add_additional_data(RAND_POOL *pool)
+{
+ struct {
+ CRYPTO_THREAD_ID tid;
+ uint64_t time;
+ } data;
+
+ /* Erase the entire structure including any padding */
+ memset(&data, 0, sizeof(data));
+
+ /*
+ * Add some noise from the thread id and a high resolution timer.
+ * The thread id adds a little randomness if the drbg is accessed
+ * concurrently (which is the case for the <master> drbg).
+ */
+ data.tid = CRYPTO_THREAD_get_current_id();
+#if __CRTL_VER >= 80400000
+ sys$gettim_prec(&data.time);
+#else
+ sys$gettim((void*)&data.time);
#endif
+
+ return rand_pool_add(pool, (unsigned char *)&data, sizeof(data), 0);
+}
+
+int rand_pool_init(void)
+{
+ return 1;
+}
+
+void rand_pool_cleanup(void)
+{
+}
+
+void rand_pool_keep_random_devices_open(int keep)
+{
+}
projects / openssl.git / blobdiff