6decf9436f
Fixes #4403 This commit moves the internal header file "internal/rand.h" to <openssl/rand_drbg.h>, making the RAND_DRBG API public. The RAND_POOL API remains private, its function prototypes were moved to "internal/rand_int.h" and converted to lowercase. Documentation for the new API is work in progress on GitHub #5461. Reviewed-by: Richard Levitte <levitte@openssl.org> (Merged from https://github.com/openssl/openssl/pull/5462)
125 lines
3.6 KiB
C
125 lines
3.6 KiB
C
/*
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* Copyright 2001-2017 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include "e_os.h"
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#if defined(OPENSSL_SYS_VMS)
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# include <openssl/rand.h>
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# include "rand_lcl.h"
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# include <descrip.h>
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# include <jpidef.h>
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# include <ssdef.h>
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# include <starlet.h>
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# include <efndef>
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# ifdef __DECC
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# pragma message disable DOLLARID
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# endif
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# ifndef OPENSSL_RAND_SEED_OS
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# error "Unsupported seeding method configured; must be os"
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# endif
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/*
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* Use 32-bit pointers almost everywhere. Define the type to which to cast a
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* pointer passed to an external function.
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*/
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# if __INITIAL_POINTER_SIZE == 64
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# define PTR_T __void_ptr64
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# pragma pointer_size save
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# pragma pointer_size 32
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# else
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# define PTR_T void *
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# endif
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static struct items_data_st {
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short length, code; /* length is number of bytes */
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} items_data[] = {
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{4, JPI$_BUFIO},
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{4, JPI$_CPUTIM},
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{4, JPI$_DIRIO},
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{4, JPI$_IMAGECOUNT},
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{8, JPI$_LAST_LOGIN_I},
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{8, JPI$_LOGINTIM},
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{4, JPI$_PAGEFLTS},
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{4, JPI$_PID},
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{4, JPI$_PPGCNT},
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{4, JPI$_WSPEAK},
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{4, JPI$_FINALEXC},
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{0, 0}
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};
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size_t rand_pool_acquire_entropy(RAND_POOL *pool)
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{
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/* determine the number of items in the JPI array */
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struct items_data_st item_entry;
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int item_entry_count = OSSL_NELEM(items_data);
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/* Create the JPI itemlist array to hold item_data content */
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struct {
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short length, code;
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int *buffer;
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int *retlen;
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} item[item_entry_count], *pitem;
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struct items_data_st *pitems_data;
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int data_buffer[(item_entry_count * 2) + 4]; /* 8 bytes per entry max */
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int iosb[2];
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int sys_time[2];
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int *ptr;
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int i, j ;
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int tmp_length = 0;
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int total_length = 0;
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/* Setup itemlist for GETJPI */
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pitems_data = items_data;
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for (pitem = item; pitems_data->length != 0; pitem++) {
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pitem->length = pitems_data->length;
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pitem->code = pitems_data->code;
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pitem->buffer = &data_buffer[total_length];
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pitem->retlen = 0;
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/* total_length is in longwords */
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total_length += pitems_data->length / 4;
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pitems_data++;
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}
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pitem->length = pitem->code = 0;
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/* Fill data_buffer with various info bits from this process */
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if (sys$getjpiw(EFN$C_ENF, NULL, NULL, item, &iosb, 0, 0) != SS$_NORMAL)
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return 0;
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/* Now twist that data to seed the SSL random number init */
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for (i = 0; i < total_length; i++) {
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sys$gettim((struct _generic_64 *)&sys_time[0]);
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srand(sys_time[0] * data_buffer[0] * data_buffer[1] + i);
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if (i == (total_length - 1)) { /* for JPI$_FINALEXC */
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ptr = &data_buffer[i];
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for (j = 0; j < 4; j++) {
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data_buffer[i + j] = ptr[j];
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/* OK to use rand() just to scramble the seed */
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data_buffer[i + j] ^= (sys_time[0] ^ rand());
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tmp_length++;
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}
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} else {
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/* OK to use rand() just to scramble the seed */
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data_buffer[i] ^= (sys_time[0] ^ rand());
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}
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}
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total_length += (tmp_length - 1);
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/*
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* Size of seed is total_length*4 bytes (64bytes). The original assumption
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* was that it contains 4 bits of entropy per byte. This makes a total
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* amount of total_length*16 bits (256bits).
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*/
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return rand_pool_add(pool,
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(PTR_T)data_buffer, total_length * 4,
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total_length * 16);
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}
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#endif
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