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|
/*
WARNING: This file was generated by dkct.
Changes you make here will be lost if dkct is run again!
You should modify the original source and run dkct on it.
Original source: dk-pwg-rnd.ctr
*/
/*
Copyright (C) 2015-2017, Dirk Krause
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above opyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
* Neither the name of the author nor the names of contributors may be used
to endorse or promote products derived from this software without specific
prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED.
IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @file dk-pwg-rnd.c The dk-pwg-rnd module.
*/
#line 97 "dk-pwg-rnd.ctr"
#include "dk4conf.h"
#include <stdio.h>
#if DK4_HAVE_STDLIB_H
#ifndef STDLIB_H_INCLUDED
#include <stdlib.h>
#endif
#endif
#if DK4_HAVE_SYS_TYPES_H
#ifndef SYS_TYPES_H_INCLUDED
#include <sys/types.h>
#define SYS_TYPES_H_INCLUDED 1
#endif
#endif
#if DK4_HAVE_OPENSSL_RAND_H
#ifndef OPENSSL_RAND_H_INCLUDED
#include <openssl/rand.h>
#define OPENSSL_RAND_H_INCLUDED 1
#endif
#endif
#include "dk4rnd.h"
#line 127 "dk-pwg-rnd.ctr"
static const int dk4rnd_used_type =
#if DK4_HAVE_OPENSSL_RAND_H
DK4_PRNG_OPENSSL
#else
#if DK4_HAVE_RANDOM
DK4_PRNG_STATE
#else
#if DK4_HAVE_LRAND48
DK4_PRNG_RAND48
#else
#if DK4_HAVE_RAND
DK4_PRNG_SIMPLE
#else
0
#endif
#endif
#endif
#endif
;
/** Static keywords used by the module, not localized.
*/
static const char * const dk4rnd_kwnl[] = {
/* 0 */
"EGDSOCKET",
/* 1 */
"/dev/random",
/* 2 */
"/dev/urandom",
NULL
#line 169 "dk-pwg-rnd.ctr"
};
/** Flag: Already seeded.
*/
static int dk4rnd_seeded = 0;
#if !DK4_HAVE_OPENSSL_RAND_H
#if DK4_HAVE_RANDOM || DK4_HAVE_LRAND48 || DK4_HAVE_RAND
/** Attempt to obtain seed data.
@param bptr Buffer pointer.
@param sz Buffer size.
@return 1 on success, 0 on error.
*/
static
int
dk4rnd_find_seed_data(void *bptr, size_t sz)
{
#if DK4_ON_WINDOWS
HCRYPTPROV hcp; /* Crypto provider */
BOOL res; /* Operation result */
#else
#if DK4_HAVE_SOCKET
struct sockaddr_un soun; /* Unix domain socket addr */
socklen_t szs; /* Socket length */
ssize_t sobytes; /* Bytes obtained */
int udsock; /* Unix domain socket */
#endif
char *egdsn = NULL;
#endif
FILE *fipo;
size_t rdb;
int back = 0;
/* EGD socket
*/
#if !DK4_ON_WINDOWS
egdsn = getenv(dk4rnd_kwnl[0]);
if (NULL != egdsn) {
if (108 > strlen(egdsn)) {
udsock = socket(AF_UNIX, SOCK_STREAM, 0);
if (-1 < udsock) {
soun.sun_family = AF_UNIX;
strcpy(soun.sun_path, egdsn);
szs = sizeof(struct sockaddr_un) - sizeof(soun.sun_path)
+ strlen(soun.sun_path);
if (0 == connect(udsock, (const struct sockaddr *)(&soun), szs)) {
sobytes = recv(udsock, bptr, sz, 0);
if (0 < sobytes) {
if ((size_t)sobytes == sz) {
back = 1;
}
} else {
#line 227 "dk-pwg-rnd.ctr"
}
} else {
#line 229 "dk-pwg-rnd.ctr"
}
close(udsock);
} else {
#line 232 "dk-pwg-rnd.ctr"
}
} else {
#line 234 "dk-pwg-rnd.ctr"
}
} else {
#line 236 "dk-pwg-rnd.ctr"
}
if (1 == back) { goto finished; }
#endif
/* System mechanisms.
*/
#if DK4_ON_WINDOWS
res = CryptAcquireContext(
&hcp, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT
);
if (res) {
res = CryptGenRandom(hcp, (DWORD)sz, bptr);
if (res) {
back = 1;
}
CryptReleaseContext(hcp, (DWORD)0L);
}
#else
fipo = fopen(dk4rnd_kwnl[1], "rb");
if (NULL != fipo) {
rdb = fread(bptr, 1, sz, fipo);
fclose(fipo);
if ((0 < rdb) && (sz == rdb)) {
back = 1;
}
} else {
fipo = fopen(dk4rnd_kwnl[2], "rb");
if (NULL != fipo) {
rdb = fread(bptr, 1, sz, fipo);
fclose(fipo);
if ((0 < rdb) && (sz == rdb)) {
back = 1;
}
}
}
#endif
finished:
return back;
}
#endif
#endif
#if DK4_HAVE_OPENSSL_RAND_H
/* +++++ OpenSSL available */
int
dk4rnd_init(dk4_er_t *erp)
{
char sbuf[256]; /* Buffer for seed data */
#if DK4_ON_WINDOWS
HCRYPTPROV hcp;
#endif
FILE *fipo = NULL; /* Input file */
size_t rdb = 0; /* Number of bytes read */
char *egdsn = NULL; /* EGD socket name */
int back = 0;
#if DK4_ON_WINDOWS
BOOL res = FALSE;
#endif
/* Let OpenSSL initialize itself.
*/
if (1 == RAND_status()) {
back = 1; goto finished;
}
/* Attempt EGD socket.
*/
#if DK4_HAVE_RAND_EGD && DK4_HAVE_STRUCT_SOCKADDR_UN
egdsn = getenv(dk4rnd_kwnl[0]);
if (NULL != egdsn) {
RAND_egd(egdsn);
if (1 == RAND_status()) {
back = 1; goto finished;
}
}
#endif
/* Attempt native mechanisms.
*/
#if DK4_ON_WINDOWS
res = CryptAcquireContext(
&hcp, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT
);
if (res) {
res = CryptGenRandom(hcp, (DWORD)sizeof(sbuf), sbuf);
if (res) {
RAND_seed(sbuf, sizeof(sbuf));
if (1 == RAND_status()) {
back = 1;
}
}
CryptReleaseContext(hcp, (DWORD)0L);
}
if (1 == back) { goto finished; }
#else
fipo = fopen(dk4rnd_kwnl[1], "rb");
if (NULL != fipo) {
rdb = fread(sbuf, 1, sizeof(sbuf), fipo);
fclose(fipo);
if (rdb > 0) {
RAND_seed(sbuf, rdb);
if (1 == RAND_status()) {
back = 1; goto finished;
}
}
} else {
fipo = fopen(dk4rnd_kwnl[2], "rb");
if (NULL != fipo) {
rdb = fread(sbuf, 1, sizeof(sbuf), fipo);
fclose(fipo);
if (rdb > 0) {
RAND_seed(sbuf, rdb);
if (1 == RAND_status()) {
back = 1; goto finished;
}
}
}
}
#endif
dk4error_set_simple_error_code(erp, DK4_E_NOT_FOUND);
finished:
if (1 == back) {
dk4rnd_seeded = 1;
}
return back;
}
int
dk4rnd_get_data(void *bptr, size_t bs, dk4_er_t *erp)
{
int back = 0;
if ((NULL != bptr) && (0 < bs)) {
if ((dk4_um_t)bs <= (dk4_um_t)INT_MAX) {
if (0 != dk4rnd_seeded) {
back = RAND_bytes(bptr, (int)bs);
if (1 > back) {
dk4error_set_simple_error_code(erp, DK4_E_NOT_FOUND);
}
} else {
dk4error_set_simple_error_code(erp, DK4_E_SYNTAX);
}
} else {
dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
}
} else {
dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
}
return back;
}
void
dk4rnd_cleanup(void)
{
RAND_cleanup();
dk4rnd_seeded = 0;
}
/* ----- OpenSSL available */
#else
#if DK4_HAVE_RANDOM
/* +++++ initstate(), setstate() and random() available */
/** State array.
*/
static char dk4rnd_random_state[256];
/** The initial state array.
*/
static char *dk4rnd_old_state = NULL;
int
dk4rnd_init(dk4_er_t *erp)
{
unsigned int sv; /* Seed value */
int back = 0;
if (0 != dk4rnd_find_seed_data(&sv, sizeof(sv))) {
DK4_MEMRES(dk4rnd_random_state, sizeof(dk4rnd_random_state));
if (NULL == dk4rnd_old_state) {
dk4rnd_old_state = initstate(sv, dk4rnd_random_state, 256);
} else {
(void)initstate(sv, dk4rnd_random_state, 256);
}
back = 1;
}
if (1 == back) { dk4rnd_seeded = 1; }
return back;
}
int
dk4rnd_get_data(void *bptr, size_t bs, dk4_er_t *erp)
{
int back = 0;
if ((NULL != bptr) && (0 < bs)) {
if (0 != dk4rnd_seeded) {
} else {
dk4error_set_simple_error_code(erp, DK4_E_SYNTAX);
}
} else {
dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
}
return back;
}
void
dk4rnd_cleanup(void)
{
}
/* ----- initstate(), setstate() and random() available */
#else
#if DK4_HAVE_LRAND48
/* +++++ lrand48(), nrand48() and seed48() available */
int
dk4rnd_init(dk4_er_t *erp)
{
int back = 0;
finished:
if (1 == back) { dk4rnd_seeded = 1; }
return back;
}
int
dk4rnd_get_data(void *bptr, size_t bs, dk4_er_t *erp)
{
int back = 0;
if ((NULL != bptr) && (0 < bs)) {
if (0 != dk4rnd_seeded) {
} else {
dk4error_set_simple_error_code(erp, DK4_E_SYNTAX);
}
} else {
dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
}
return back;
}
void
dk4rnd_cleanup(void)
{
}
/* ----- lrand48(), nrand48() and seed48() available */
#else
#if DK4_HAVE_RAND
/* +++++ rand() and srand() available */
int
dk4rnd_init(dk4_er_t *erp)
{
int back = 0;
finished:
if (1 == back) { dk4rnd_seeded = 1; }
return back;
}
int
dk4rnd_get_data(void *bptr, size_t bs, dk4_er_t *erp)
{
int back = 0;
if ((NULL != bptr) && (0 < bs)) {
if (0 != dk4rnd_seeded) {
} else {
dk4error_set_simple_error_code(erp, DK4_E_SYNTAX);
}
} else {
dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
}
return back;
}
void
dk4rnd_cleanup(void)
{
}
/* ----- rand() and srand() available */
#else
/* +++++ no PRNG available */
int
dk4rnd_init(dk4_er_t *erp)
{
int back = 0;
return back;
}
int
dk4rnd_get_data(void *bptr, size_t bs, dk4_er_t *erp)
{
int back = 0;
if ((NULL != bptr) && (0 < bs)) {
} else {
dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
}
return back;
}
void
dk4rnd_cleanup(void)
{
}
/* ----- no PRNG available */
#endif
#endif
#endif
#endif
int
dk4rnd_get_prng_type(void)
{
return dk4rnd_used_type;
}
|