2 * Copyright 2001-2018 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (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
12 #if defined(OPENSSL_SYS_VMS)
13 # include "internal/cryptlib.h"
14 # include <openssl/rand.h>
15 # include "internal/rand_int.h"
16 # include "rand_lcl.h"
23 # pragma message disable DOLLARID
26 # ifndef OPENSSL_RAND_SEED_OS
27 # error "Unsupported seeding method configured; must be os"
31 * Use 32-bit pointers almost everywhere. Define the type to which to cast a
32 * pointer passed to an external function.
34 # if __INITIAL_POINTER_SIZE == 64
35 # define PTR_T __void_ptr64
36 # pragma pointer_size save
37 # pragma pointer_size 32
42 static struct items_data_st {
43 short length, code; /* length is number of bytes */
49 {8, JPI$_LAST_LOGIN_I},
60 * We assume there we get about 4 bits of entropy per byte from the items
61 * above, with a bit of scrambling added rand_pool_acquire_entropy()
63 #define ENTROPY_BITS_PER_BYTE 4
65 size_t rand_pool_acquire_entropy(RAND_POOL *pool)
67 /* determine the number of items in the JPI array */
68 struct items_data_st item_entry;
69 size_t item_entry_count = OSSL_NELEM(items_data);
70 /* Create the 32-bit JPI itemlist array to hold item_data content */
72 uint16_t length, code;
75 } item[item_entry_count], *pitem;
76 struct items_data_st *pitems_data;
77 /* 8 bytes (two longs) per entry max */
78 uint32_t data_buffer[(item_entry_count * 2) + 4];
83 size_t tmp_length = 0;
84 size_t total_length = 0;
85 size_t bytes_needed = rand_pool_bytes_needed(pool, ENTROPY_BITS_PER_BYTE);
86 size_t bytes_remaining = rand_pool_bytes_remaining(pool);
88 /* Setup itemlist for GETJPI */
89 pitems_data = items_data;
90 for (pitem = item; pitems_data->length != 0; pitem++) {
91 pitem->length = pitems_data->length;
92 pitem->code = pitems_data->code;
93 pitem->buffer = &data_buffer[total_length];
95 /* total_length is in longwords */
96 total_length += pitems_data->length / 4;
99 pitem->length = pitem->code = 0;
101 /* Fill data_buffer with various info bits from this process */
102 if (sys$getjpiw(EFN$C_ENF, NULL, NULL, item, &iosb, 0, 0) != SS$_NORMAL)
105 /* Now twist that data to seed the SSL random number init */
106 for (i = 0; i < total_length; i++) {
107 sys$gettim((struct _generic_64 *)&sys_time[0]);
108 srand(sys_time[0] * data_buffer[0] * data_buffer[1] + i);
110 if (i == (total_length - 1)) { /* for JPI$_FINALEXC */
111 ptr = &data_buffer[i];
112 for (j = 0; j < 4; j++) {
113 data_buffer[i + j] = ptr[j];
114 /* OK to use rand() just to scramble the seed */
115 data_buffer[i + j] ^= (sys_time[0] ^ rand());
119 /* OK to use rand() just to scramble the seed */
120 data_buffer[i] ^= (sys_time[0] ^ rand());
124 total_length += (tmp_length - 1);
126 /* Change the total length to number of bytes */
130 * If we can't feed the requirements from the caller, we're in deep trouble.
132 if (!ossl_assert(total_length >= bytes_needed)) {
134 char availablestr[20];
136 BIO_snprintf(neededstr, sizeof(neededstr), "%zu", bytes_needed);
137 BIO_snprintf(availablestr, sizeof(availablestr), "%zu", total_length);
138 RANDerr(RAND_F_RAND_POOL_ACQUIRE_ENTROPY,
139 RAND_R_RANDOM_POOL_UNDERFLOW);
140 ERR_add_error_data(4, "Needed: ", neededstr, ", Available: ",
146 * Try not to overfeed the pool
148 if (total_length > bytes_remaining)
149 total_length = bytes_remaining;
151 rand_pool_add(pool, (PTR_T)data_buffer, total_length,
152 total_length * ENTROPY_BITS_PER_BYTE);
153 return rand_pool_entropy_available(pool);