- Modifications to compile ImageMagick
This commit is contained in:
Santi Noreña
parent
615ec83706
commit
83522c16c3
3442 changed files with 57 additions and 412926 deletions
928
ImageMagick/magick/random.c
Normal file
928
ImageMagick/magick/random.c
Normal file
|
|
@ -0,0 +1,928 @@
|
|||
/*
|
||||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||
% %
|
||||
% %
|
||||
% RRRR AAA N N DDDD OOO M M %
|
||||
% R R A A NN N D D O O MM MM %
|
||||
% RRRR AAAAA N N N D D O O M M M %
|
||||
% R R A A N NN D D O O M M %
|
||||
% R R A A N N DDDD OOO M M %
|
||||
% %
|
||||
% %
|
||||
% MagickCore Methods to Generate Random Numbers %
|
||||
% %
|
||||
% Software Design %
|
||||
% John Cristy %
|
||||
% December 2001 %
|
||||
% %
|
||||
% %
|
||||
% Copyright 1999-2013 ImageMagick Studio LLC, a non-profit organization %
|
||||
% dedicated to making software imaging solutions freely available. %
|
||||
% %
|
||||
% You may not use this file except in compliance with the License. You may %
|
||||
% obtain a copy of the License at %
|
||||
% %
|
||||
% http://www.imagemagick.org/script/license.php %
|
||||
% %
|
||||
% Unless required by applicable law or agreed to in writing, software %
|
||||
% distributed under the License is distributed on an "AS IS" BASIS, %
|
||||
% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
|
||||
% See the License for the specific language governing permissions and %
|
||||
% limitations under the License. %
|
||||
% %
|
||||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||
%
|
||||
% The generation of random numbers is too important to be left to chance.
|
||||
% -- Tom Christiansen <tchrist@mox.perl.com>
|
||||
%
|
||||
%
|
||||
*/
|
||||
|
||||
/*
|
||||
Include declarations.
|
||||
*/
|
||||
#if defined(__VMS)
|
||||
#include <time.h>
|
||||
#endif
|
||||
#if defined(__MINGW32__) || defined(__MINGW64__)
|
||||
#include <sys/time.h>
|
||||
#endif
|
||||
#include "magick/studio.h"
|
||||
#include "magick/exception.h"
|
||||
#include "magick/exception-private.h"
|
||||
#include "magick/memory_.h"
|
||||
#include "magick/semaphore.h"
|
||||
#include "magick/random_.h"
|
||||
#include "magick/resource_.h"
|
||||
#include "magick/signature-private.h"
|
||||
#include "magick/string_.h"
|
||||
#include "magick/thread_.h"
|
||||
#include "magick/thread-private.h"
|
||||
#include "magick/utility-private.h"
|
||||
/*
|
||||
Define declarations.
|
||||
*/
|
||||
#define PseudoRandomHash SHA256Hash
|
||||
#define RandomEntropyLevel 9
|
||||
#define RandomFilename "reservoir.xdm"
|
||||
#define RandomFiletype "random"
|
||||
#define RandomProtocolMajorVersion 1
|
||||
#define RandomProtocolMinorVersion 0
|
||||
|
||||
/*
|
||||
Typedef declarations.
|
||||
*/
|
||||
struct _RandomInfo
|
||||
{
|
||||
SignatureInfo
|
||||
*signature_info;
|
||||
|
||||
StringInfo
|
||||
*nonce,
|
||||
*reservoir;
|
||||
|
||||
size_t
|
||||
i;
|
||||
|
||||
unsigned long
|
||||
seed[4];
|
||||
|
||||
double
|
||||
normalize;
|
||||
|
||||
unsigned long
|
||||
secret_key;
|
||||
|
||||
unsigned short
|
||||
protocol_major,
|
||||
protocol_minor;
|
||||
|
||||
SemaphoreInfo
|
||||
*semaphore;
|
||||
|
||||
ssize_t
|
||||
timestamp;
|
||||
|
||||
size_t
|
||||
signature;
|
||||
};
|
||||
|
||||
/*
|
||||
External declarations.
|
||||
*/
|
||||
#if defined(__APPLE__) && !defined(TARGET_OS_IPHONE)
|
||||
#include <crt_externs.h>
|
||||
#define environ (*_NSGetEnviron())
|
||||
#endif
|
||||
|
||||
extern char
|
||||
**environ;
|
||||
|
||||
/*
|
||||
Global declarations.
|
||||
*/
|
||||
static SemaphoreInfo
|
||||
*random_semaphore = (SemaphoreInfo *) NULL;
|
||||
|
||||
static unsigned long
|
||||
secret_key = ~0UL;
|
||||
|
||||
static MagickBooleanType
|
||||
gather_true_random = MagickFalse;
|
||||
|
||||
/*
|
||||
Forward declarations.
|
||||
*/
|
||||
static StringInfo
|
||||
*GenerateEntropicChaos(RandomInfo *);
|
||||
|
||||
/*
|
||||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||
% %
|
||||
% %
|
||||
% %
|
||||
% A c q u i r e R a n d o m I n f o %
|
||||
% %
|
||||
% %
|
||||
% %
|
||||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||
%
|
||||
% AcquireRandomInfo() allocates the RandomInfo structure.
|
||||
%
|
||||
% The format of the AcquireRandomInfo method is:
|
||||
%
|
||||
% RandomInfo *AcquireRandomInfo(void)
|
||||
%
|
||||
*/
|
||||
|
||||
static inline size_t MagickMin(const size_t x,const size_t y)
|
||||
{
|
||||
if (x < y)
|
||||
return(x);
|
||||
return(y);
|
||||
}
|
||||
|
||||
MagickExport RandomInfo *AcquireRandomInfo(void)
|
||||
{
|
||||
const StringInfo
|
||||
*digest;
|
||||
|
||||
RandomInfo
|
||||
*random_info;
|
||||
|
||||
StringInfo
|
||||
*entropy,
|
||||
*key,
|
||||
*nonce;
|
||||
|
||||
random_info=(RandomInfo *) AcquireMagickMemory(sizeof(*random_info));
|
||||
if (random_info == (RandomInfo *) NULL)
|
||||
ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
|
||||
(void) ResetMagickMemory(random_info,0,sizeof(*random_info));
|
||||
random_info->signature_info=AcquireSignatureInfo();
|
||||
random_info->nonce=AcquireStringInfo(2*GetSignatureDigestsize(
|
||||
random_info->signature_info));
|
||||
ResetStringInfo(random_info->nonce);
|
||||
random_info->reservoir=AcquireStringInfo(GetSignatureDigestsize(
|
||||
random_info->signature_info));
|
||||
ResetStringInfo(random_info->reservoir);
|
||||
random_info->normalize=1.0/(~0UL);
|
||||
random_info->secret_key=secret_key;
|
||||
random_info->protocol_major=RandomProtocolMajorVersion;
|
||||
random_info->protocol_minor=RandomProtocolMinorVersion;
|
||||
random_info->semaphore=AllocateSemaphoreInfo();
|
||||
random_info->timestamp=(ssize_t) time(0);
|
||||
random_info->signature=MagickSignature;
|
||||
/*
|
||||
Seed random nonce.
|
||||
*/
|
||||
nonce=GenerateEntropicChaos(random_info);
|
||||
if (nonce == (StringInfo *) NULL)
|
||||
ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
|
||||
InitializeSignature(random_info->signature_info);
|
||||
UpdateSignature(random_info->signature_info,nonce);
|
||||
FinalizeSignature(random_info->signature_info);
|
||||
SetStringInfoLength(nonce,(GetSignatureDigestsize(
|
||||
random_info->signature_info)+1)/2);
|
||||
SetStringInfo(nonce,GetSignatureDigest(random_info->signature_info));
|
||||
SetStringInfo(random_info->nonce,nonce);
|
||||
nonce=DestroyStringInfo(nonce);
|
||||
/*
|
||||
Seed random reservoir with entropic data.
|
||||
*/
|
||||
entropy=GenerateEntropicChaos(random_info);
|
||||
if (entropy == (StringInfo *) NULL)
|
||||
ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
|
||||
UpdateSignature(random_info->signature_info,entropy);
|
||||
FinalizeSignature(random_info->signature_info);
|
||||
SetStringInfo(random_info->reservoir,GetSignatureDigest(
|
||||
random_info->signature_info));
|
||||
entropy=DestroyStringInfo(entropy);
|
||||
/*
|
||||
Seed pseudo random number generator.
|
||||
*/
|
||||
if (random_info->secret_key == ~0UL)
|
||||
{
|
||||
key=GetRandomKey(random_info,sizeof(random_info->secret_key));
|
||||
(void) CopyMagickMemory(random_info->seed,GetStringInfoDatum(key),
|
||||
GetStringInfoLength(key));
|
||||
key=DestroyStringInfo(key);
|
||||
}
|
||||
else
|
||||
{
|
||||
SignatureInfo
|
||||
*signature_info;
|
||||
|
||||
signature_info=AcquireSignatureInfo();
|
||||
key=AcquireStringInfo(sizeof(random_info->secret_key));
|
||||
SetStringInfoDatum(key,(unsigned char *) &random_info->secret_key);
|
||||
UpdateSignature(signature_info,key);
|
||||
key=DestroyStringInfo(key);
|
||||
FinalizeSignature(signature_info);
|
||||
digest=GetSignatureDigest(signature_info);
|
||||
(void) CopyMagickMemory(random_info->seed,GetStringInfoDatum(digest),
|
||||
MagickMin(GetSignatureDigestsize(signature_info),
|
||||
sizeof(*random_info->seed)));
|
||||
signature_info=DestroySignatureInfo(signature_info);
|
||||
}
|
||||
random_info->seed[1]=0x50a7f451UL;
|
||||
random_info->seed[2]=0x5365417eUL;
|
||||
random_info->seed[3]=0xc3a4171aUL;
|
||||
return(random_info);
|
||||
}
|
||||
|
||||
/*
|
||||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||
% %
|
||||
% %
|
||||
% %
|
||||
+ D e s t r o y R a n d o m I n f o %
|
||||
% %
|
||||
% %
|
||||
% %
|
||||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||
%
|
||||
% DestroyRandomInfo() deallocates memory associated with the random
|
||||
% reservoir.
|
||||
%
|
||||
% The format of the DestroyRandomInfo method is:
|
||||
%
|
||||
% RandomInfo *DestroyRandomInfo(RandomInfo *random_info)
|
||||
%
|
||||
% A description of each parameter follows:
|
||||
%
|
||||
% o random_info: the random info.
|
||||
%
|
||||
*/
|
||||
MagickExport RandomInfo *DestroyRandomInfo(RandomInfo *random_info)
|
||||
{
|
||||
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
|
||||
assert(random_info != (RandomInfo *) NULL);
|
||||
assert(random_info->signature == MagickSignature);
|
||||
LockSemaphoreInfo(random_info->semaphore);
|
||||
if (random_info->reservoir != (StringInfo *) NULL)
|
||||
random_info->reservoir=DestroyStringInfo(random_info->reservoir);
|
||||
if (random_info->nonce != (StringInfo *) NULL)
|
||||
random_info->nonce=DestroyStringInfo(random_info->nonce);
|
||||
if (random_info->signature_info != (SignatureInfo *) NULL)
|
||||
random_info->signature_info=DestroySignatureInfo(
|
||||
random_info->signature_info);
|
||||
(void) ResetMagickMemory(random_info->seed,0,sizeof(*random_info->seed));
|
||||
random_info->signature=(~MagickSignature);
|
||||
UnlockSemaphoreInfo(random_info->semaphore);
|
||||
DestroySemaphoreInfo(&random_info->semaphore);
|
||||
random_info=(RandomInfo *) RelinquishMagickMemory(random_info);
|
||||
return(random_info);
|
||||
}
|
||||
|
||||
/*
|
||||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||
% %
|
||||
% %
|
||||
% %
|
||||
+ G e n e r a t e E n t r o p i c C h a o s %
|
||||
% %
|
||||
% %
|
||||
% %
|
||||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||
%
|
||||
% GenerateEntropicChaos() generate entropic chaos used to initialize the
|
||||
% random reservoir.
|
||||
%
|
||||
% The format of the GenerateEntropicChaos method is:
|
||||
%
|
||||
% StringInfo *GenerateEntropicChaos(RandomInfo *random_info)
|
||||
%
|
||||
% A description of each parameter follows:
|
||||
%
|
||||
% o random_info: the random info.
|
||||
%
|
||||
*/
|
||||
|
||||
#if !defined(MAGICKCORE_WINDOWS_SUPPORT)
|
||||
static ssize_t ReadRandom(int file,unsigned char *source,size_t length)
|
||||
{
|
||||
register unsigned char
|
||||
*q;
|
||||
|
||||
ssize_t
|
||||
offset,
|
||||
count;
|
||||
|
||||
offset=0;
|
||||
for (q=source; length != 0; length-=count)
|
||||
{
|
||||
count=(ssize_t) read(file,q,length);
|
||||
if (count <= 0)
|
||||
{
|
||||
count=0;
|
||||
if (errno == EINTR)
|
||||
continue;
|
||||
return(-1);
|
||||
}
|
||||
q+=count;
|
||||
offset+=count;
|
||||
}
|
||||
return(offset);
|
||||
}
|
||||
#endif
|
||||
|
||||
static StringInfo *GenerateEntropicChaos(RandomInfo *random_info)
|
||||
{
|
||||
#define MaxEntropyExtent 64
|
||||
|
||||
MagickThreadType
|
||||
tid;
|
||||
|
||||
StringInfo
|
||||
*chaos,
|
||||
*entropy;
|
||||
|
||||
size_t
|
||||
nanoseconds,
|
||||
seconds;
|
||||
|
||||
ssize_t
|
||||
pid;
|
||||
|
||||
/*
|
||||
Initialize random reservoir.
|
||||
*/
|
||||
entropy=AcquireStringInfo(0);
|
||||
LockSemaphoreInfo(random_info->semaphore);
|
||||
chaos=AcquireStringInfo(sizeof(unsigned char *));
|
||||
SetStringInfoDatum(chaos,(unsigned char *) &entropy);
|
||||
ConcatenateStringInfo(entropy,chaos);
|
||||
SetStringInfoDatum(chaos,(unsigned char *) entropy);
|
||||
ConcatenateStringInfo(entropy,chaos);
|
||||
pid=(ssize_t) getpid();
|
||||
SetStringInfoLength(chaos,sizeof(pid));
|
||||
SetStringInfoDatum(chaos,(unsigned char *) &pid);
|
||||
ConcatenateStringInfo(entropy,chaos);
|
||||
tid=GetMagickThreadId();
|
||||
SetStringInfoLength(chaos,sizeof(tid));
|
||||
SetStringInfoDatum(chaos,(unsigned char *) &tid);
|
||||
ConcatenateStringInfo(entropy,chaos);
|
||||
#if defined(MAGICKCORE_HAVE_GETRUSAGE) && defined(RUSAGE_SELF)
|
||||
{
|
||||
struct rusage
|
||||
usage;
|
||||
|
||||
if (getrusage(RUSAGE_SELF,&usage) == 0)
|
||||
{
|
||||
SetStringInfoLength(chaos,sizeof(usage));
|
||||
SetStringInfoDatum(chaos,(unsigned char *) &usage);
|
||||
}
|
||||
}
|
||||
#endif
|
||||
seconds=time((time_t *) 0);
|
||||
nanoseconds=0;
|
||||
#if defined(MAGICKCORE_HAVE_GETTIMEOFDAY)
|
||||
{
|
||||
struct timeval
|
||||
timer;
|
||||
|
||||
if (gettimeofday(&timer,(struct timezone *) NULL) == 0)
|
||||
{
|
||||
seconds=timer.tv_sec;
|
||||
nanoseconds=1000UL*timer.tv_usec;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
#if defined(MAGICKCORE_HAVE_CLOCK_GETTIME) && defined(CLOCK_REALTIME_HR)
|
||||
{
|
||||
struct timespec
|
||||
timer;
|
||||
|
||||
if (clock_gettime(CLOCK_REALTIME_HR,&timer) == 0)
|
||||
{
|
||||
seconds=timer.tv_sec;
|
||||
nanoseconds=timer.tv_nsec;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
SetStringInfoLength(chaos,sizeof(seconds));
|
||||
SetStringInfoDatum(chaos,(unsigned char *) &seconds);
|
||||
ConcatenateStringInfo(entropy,chaos);
|
||||
SetStringInfoLength(chaos,sizeof(nanoseconds));
|
||||
SetStringInfoDatum(chaos,(unsigned char *) &nanoseconds);
|
||||
ConcatenateStringInfo(entropy,chaos);
|
||||
nanoseconds=0;
|
||||
#if defined(MAGICKCORE_HAVE_CLOCK)
|
||||
nanoseconds=clock();
|
||||
#endif
|
||||
#if defined(MAGICKCORE_HAVE_TIMES)
|
||||
{
|
||||
struct tms
|
||||
timer;
|
||||
|
||||
(void) times(&timer);
|
||||
nanoseconds=timer.tms_utime+timer.tms_stime;
|
||||
}
|
||||
#endif
|
||||
SetStringInfoLength(chaos,sizeof(nanoseconds));
|
||||
SetStringInfoDatum(chaos,(unsigned char *) &nanoseconds);
|
||||
ConcatenateStringInfo(entropy,chaos);
|
||||
#if defined(MAGICKCORE_HAVE_MKSTEMP)
|
||||
{
|
||||
char
|
||||
*filename;
|
||||
|
||||
int
|
||||
file;
|
||||
|
||||
filename=ConstantString("magickXXXXXX");
|
||||
file=mkstemp(filename);
|
||||
#if defined(__OS2__)
|
||||
setmode(file,O_BINARY);
|
||||
#endif
|
||||
if (file != -1)
|
||||
(void) close(file);
|
||||
(void) remove_utf8(filename);
|
||||
SetStringInfoLength(chaos,strlen(filename));
|
||||
SetStringInfoDatum(chaos,(unsigned char *) filename);
|
||||
ConcatenateStringInfo(entropy,chaos);
|
||||
filename=DestroyString(filename);
|
||||
}
|
||||
#endif
|
||||
#if defined(MAGICKCORE_WINDOWS_SUPPORT)
|
||||
{
|
||||
double
|
||||
seconds;
|
||||
|
||||
LARGE_INTEGER
|
||||
nanoseconds;
|
||||
|
||||
MagickBooleanType
|
||||
status;
|
||||
|
||||
/*
|
||||
Not crytographically strong but better than nothing.
|
||||
*/
|
||||
seconds=NTElapsedTime()+NTUserTime();
|
||||
SetStringInfoLength(chaos,sizeof(seconds));
|
||||
SetStringInfoDatum(chaos,(unsigned char *) &seconds);
|
||||
ConcatenateStringInfo(entropy,chaos);
|
||||
if (QueryPerformanceCounter(&nanoseconds) != 0)
|
||||
{
|
||||
SetStringInfoLength(chaos,sizeof(nanoseconds));
|
||||
SetStringInfoDatum(chaos,(unsigned char *) &nanoseconds);
|
||||
ConcatenateStringInfo(entropy,chaos);
|
||||
}
|
||||
/*
|
||||
Our best hope for true entropy.
|
||||
*/
|
||||
SetStringInfoLength(chaos,MaxEntropyExtent);
|
||||
status=NTGatherRandomData(MaxEntropyExtent,GetStringInfoDatum(chaos));
|
||||
(void) status;
|
||||
ConcatenateStringInfo(entropy,chaos);
|
||||
}
|
||||
#else
|
||||
{
|
||||
char
|
||||
*filename;
|
||||
|
||||
int
|
||||
file;
|
||||
|
||||
ssize_t
|
||||
count;
|
||||
|
||||
StringInfo
|
||||
*device;
|
||||
|
||||
/*
|
||||
Not crytographically strong but better than nothing.
|
||||
*/
|
||||
if (environ != (char **) NULL)
|
||||
{
|
||||
register ssize_t
|
||||
i;
|
||||
|
||||
/*
|
||||
Squeeze some entropy from the sometimes unpredicatble environment.
|
||||
*/
|
||||
for (i=0; environ[i] != (char *) NULL; i++)
|
||||
{
|
||||
SetStringInfoLength(chaos,strlen(environ[i]));
|
||||
SetStringInfoDatum(chaos,(unsigned char *) environ[i]);
|
||||
ConcatenateStringInfo(entropy,chaos);
|
||||
}
|
||||
}
|
||||
filename=AcquireString("/dev/urandom");
|
||||
device=StringToStringInfo(filename);
|
||||
device=DestroyStringInfo(device);
|
||||
file=open_utf8(filename,O_RDONLY | O_BINARY,0);
|
||||
filename=DestroyString(filename);
|
||||
if (file != -1)
|
||||
{
|
||||
SetStringInfoLength(chaos,MaxEntropyExtent);
|
||||
count=ReadRandom(file,GetStringInfoDatum(chaos),MaxEntropyExtent);
|
||||
(void) close(file);
|
||||
SetStringInfoLength(chaos,(size_t) count);
|
||||
ConcatenateStringInfo(entropy,chaos);
|
||||
}
|
||||
if (gather_true_random != MagickFalse)
|
||||
{
|
||||
/*
|
||||
Our best hope for true entropy.
|
||||
*/
|
||||
filename=AcquireString("/dev/random");
|
||||
device=StringToStringInfo(filename);
|
||||
device=DestroyStringInfo(device);
|
||||
file=open_utf8(filename,O_RDONLY | O_BINARY,0);
|
||||
filename=DestroyString(filename);
|
||||
if (file == -1)
|
||||
{
|
||||
filename=AcquireString("/dev/srandom");
|
||||
device=StringToStringInfo(filename);
|
||||
device=DestroyStringInfo(device);
|
||||
file=open_utf8(filename,O_RDONLY | O_BINARY,0);
|
||||
}
|
||||
if (file != -1)
|
||||
{
|
||||
SetStringInfoLength(chaos,MaxEntropyExtent);
|
||||
count=ReadRandom(file,GetStringInfoDatum(chaos),MaxEntropyExtent);
|
||||
(void) close(file);
|
||||
SetStringInfoLength(chaos,(size_t) count);
|
||||
ConcatenateStringInfo(entropy,chaos);
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif
|
||||
chaos=DestroyStringInfo(chaos);
|
||||
UnlockSemaphoreInfo(random_info->semaphore);
|
||||
return(entropy);
|
||||
}
|
||||
|
||||
/*
|
||||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||
% %
|
||||
% %
|
||||
% %
|
||||
% G e t P s e u d o R a n d o m V a l u e %
|
||||
% %
|
||||
% %
|
||||
% %
|
||||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||
%
|
||||
% GetPseudoRandomValue() return a non-negative double-precision floating-point
|
||||
% value uniformly distributed over the interval [0.0, 1.0) with a 2 to the
|
||||
% 128th-1 period.
|
||||
%
|
||||
% The format of the GetPseudoRandomValue method is:
|
||||
%
|
||||
% double GetPseudoRandomValue(RandomInfo *randon_info)
|
||||
%
|
||||
% A description of each parameter follows:
|
||||
%
|
||||
% o random_info: the random info.
|
||||
%
|
||||
*/
|
||||
MagickExport double GetPseudoRandomValue(RandomInfo *random_info)
|
||||
{
|
||||
register unsigned long
|
||||
*seed;
|
||||
|
||||
unsigned long
|
||||
alpha;
|
||||
|
||||
seed=random_info->seed;
|
||||
do
|
||||
{
|
||||
alpha=(unsigned long) (seed[1] ^ (seed[1] << 11));
|
||||
seed[1]=seed[2];
|
||||
seed[2]=seed[3];
|
||||
seed[3]=seed[0];
|
||||
seed[0]=(seed[0] ^ (seed[0] >> 19)) ^ (alpha ^ (alpha >> 8));
|
||||
} while (seed[0] == ~0UL);
|
||||
return(random_info->normalize*seed[0]);
|
||||
}
|
||||
|
||||
/*
|
||||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||
% %
|
||||
% %
|
||||
% %
|
||||
% G e t R a n d o m K e y %
|
||||
% %
|
||||
% %
|
||||
% %
|
||||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||
%
|
||||
% GetRandomKey() gets a random key from the reservoir.
|
||||
%
|
||||
% The format of the GetRandomKey method is:
|
||||
%
|
||||
% StringInfo *GetRandomKey(RandomInfo *random_info,const size_t length)
|
||||
%
|
||||
% A description of each parameter follows:
|
||||
%
|
||||
% o random_info: the random info.
|
||||
%
|
||||
% o length: the key length.
|
||||
%
|
||||
*/
|
||||
MagickExport StringInfo *GetRandomKey(RandomInfo *random_info,
|
||||
const size_t length)
|
||||
{
|
||||
StringInfo
|
||||
*key;
|
||||
|
||||
assert(random_info != (RandomInfo *) NULL);
|
||||
key=AcquireStringInfo(length);
|
||||
SetRandomKey(random_info,length,GetStringInfoDatum(key));
|
||||
return(key);
|
||||
}
|
||||
|
||||
/*
|
||||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||
% %
|
||||
% %
|
||||
% %
|
||||
% G e t R a n d o m S e c r e t K e y %
|
||||
% %
|
||||
% %
|
||||
% %
|
||||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||
%
|
||||
% GetRandomSecretKey() returns the random secet key.
|
||||
%
|
||||
% The format of the GetRandomSecretKey method is:
|
||||
%
|
||||
% unsigned long GetRandomSecretKey(const RandomInfo *random_info)
|
||||
%
|
||||
% A description of each parameter follows:
|
||||
%
|
||||
% o random_info: the random info.
|
||||
*/
|
||||
MagickExport unsigned long GetRandomSecretKey(const RandomInfo *random_info)
|
||||
{
|
||||
return(random_info->secret_key);
|
||||
}
|
||||
|
||||
/*
|
||||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||
% %
|
||||
% %
|
||||
% %
|
||||
% G e t R a n d o m V a l u e %
|
||||
% %
|
||||
% %
|
||||
% %
|
||||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||
%
|
||||
% GetRandomValue() return a non-negative double-precision floating-point
|
||||
% value uniformly distributed over the interval [0.0, 1.0) with a 2 to the
|
||||
% 128th-1 period (not cryptographically strong).
|
||||
%
|
||||
% The format of the GetRandomValue method is:
|
||||
%
|
||||
% double GetRandomValue(void)
|
||||
%
|
||||
*/
|
||||
MagickExport double GetRandomValue(RandomInfo *random_info)
|
||||
{
|
||||
unsigned long
|
||||
key,
|
||||
range;
|
||||
|
||||
range=(~0UL);
|
||||
do
|
||||
{
|
||||
SetRandomKey(random_info,sizeof(key),(unsigned char *) &key);
|
||||
} while (key == range);
|
||||
return((double) key/range);
|
||||
}
|
||||
|
||||
/*
|
||||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||
% %
|
||||
% %
|
||||
% %
|
||||
+ R a n d o m C o m p o n e n t G e n e s i s %
|
||||
% %
|
||||
% %
|
||||
% %
|
||||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||
%
|
||||
% RandomComponentGenesis() instantiates the random component.
|
||||
%
|
||||
% The format of the RandomComponentGenesis method is:
|
||||
%
|
||||
% MagickBooleanType RandomComponentGenesis(void)
|
||||
%
|
||||
*/
|
||||
MagickExport MagickBooleanType RandomComponentGenesis(void)
|
||||
{
|
||||
AcquireSemaphoreInfo(&random_semaphore);
|
||||
return(MagickTrue);
|
||||
}
|
||||
|
||||
/*
|
||||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||
% %
|
||||
% %
|
||||
% %
|
||||
+ R a n d o m C o m p o n e n t T e r m i n u s %
|
||||
% %
|
||||
% %
|
||||
% %
|
||||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||
%
|
||||
% RandomComponentTerminus() destroys the random component.
|
||||
%
|
||||
% The format of the RandomComponentTerminus method is:
|
||||
%
|
||||
% RandomComponentTerminus(void)
|
||||
%
|
||||
*/
|
||||
MagickExport void RandomComponentTerminus(void)
|
||||
{
|
||||
if (random_semaphore == (SemaphoreInfo *) NULL)
|
||||
AcquireSemaphoreInfo(&random_semaphore);
|
||||
DestroySemaphoreInfo(&random_semaphore);
|
||||
}
|
||||
|
||||
/*
|
||||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||
% %
|
||||
% %
|
||||
% %
|
||||
% S e t R a n d o m K e y %
|
||||
% %
|
||||
% %
|
||||
% %
|
||||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||
%
|
||||
% SetRandomKey() sets a random key from the reservoir.
|
||||
%
|
||||
% The format of the SetRandomKey method is:
|
||||
%
|
||||
% void SetRandomKey(RandomInfo *random_info,const size_t length,
|
||||
% unsigned char *key)
|
||||
%
|
||||
% A description of each parameter follows:
|
||||
%
|
||||
% o random_info: the random info.
|
||||
%
|
||||
% o length: the key length.
|
||||
%
|
||||
% o key: the key.
|
||||
%
|
||||
*/
|
||||
|
||||
static inline void IncrementRandomNonce(StringInfo *nonce)
|
||||
{
|
||||
register ssize_t
|
||||
i;
|
||||
|
||||
unsigned char
|
||||
*datum;
|
||||
|
||||
datum=GetStringInfoDatum(nonce);
|
||||
for (i=(ssize_t) (GetStringInfoLength(nonce)-1); i != 0; i--)
|
||||
{
|
||||
datum[i]++;
|
||||
if (datum[i] != 0)
|
||||
return;
|
||||
}
|
||||
ThrowFatalException(RandomFatalError,"SequenceWrapError");
|
||||
}
|
||||
|
||||
MagickExport void SetRandomKey(RandomInfo *random_info,const size_t length,
|
||||
unsigned char *key)
|
||||
{
|
||||
register size_t
|
||||
i;
|
||||
|
||||
register unsigned char
|
||||
*p;
|
||||
|
||||
SignatureInfo
|
||||
*signature_info;
|
||||
|
||||
unsigned char
|
||||
*datum;
|
||||
|
||||
assert(random_info != (RandomInfo *) NULL);
|
||||
if (length == 0)
|
||||
return;
|
||||
LockSemaphoreInfo(random_info->semaphore);
|
||||
signature_info=random_info->signature_info;
|
||||
datum=GetStringInfoDatum(random_info->reservoir);
|
||||
i=length;
|
||||
for (p=key; (i != 0) && (random_info->i != 0); i--)
|
||||
{
|
||||
*p++=datum[random_info->i];
|
||||
random_info->i++;
|
||||
if (random_info->i == GetSignatureDigestsize(signature_info))
|
||||
random_info->i=0;
|
||||
}
|
||||
while (i >= GetSignatureDigestsize(signature_info))
|
||||
{
|
||||
InitializeSignature(signature_info);
|
||||
UpdateSignature(signature_info,random_info->nonce);
|
||||
FinalizeSignature(signature_info);
|
||||
IncrementRandomNonce(random_info->nonce);
|
||||
(void) CopyMagickMemory(p,GetStringInfoDatum(GetSignatureDigest(
|
||||
signature_info)),GetSignatureDigestsize(signature_info));
|
||||
p+=GetSignatureDigestsize(signature_info);
|
||||
i-=GetSignatureDigestsize(signature_info);
|
||||
}
|
||||
if (i != 0)
|
||||
{
|
||||
InitializeSignature(signature_info);
|
||||
UpdateSignature(signature_info,random_info->nonce);
|
||||
FinalizeSignature(signature_info);
|
||||
IncrementRandomNonce(random_info->nonce);
|
||||
SetStringInfo(random_info->reservoir,GetSignatureDigest(signature_info));
|
||||
random_info->i=i;
|
||||
datum=GetStringInfoDatum(random_info->reservoir);
|
||||
while (i-- != 0)
|
||||
p[i]=datum[i];
|
||||
}
|
||||
UnlockSemaphoreInfo(random_info->semaphore);
|
||||
}
|
||||
|
||||
/*
|
||||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||
% %
|
||||
% %
|
||||
% %
|
||||
% S e t R a n d o m S e c r e t K e y %
|
||||
% %
|
||||
% %
|
||||
% %
|
||||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||
%
|
||||
% SetRandomSecretKey() sets the pseudo-random number generator secret key.
|
||||
%
|
||||
% The format of the SetRandomSecretKey method is:
|
||||
%
|
||||
% void SetRandomSecretKey(const unsigned long key)
|
||||
%
|
||||
% A description of each parameter follows:
|
||||
%
|
||||
% o key: the secret key.
|
||||
%
|
||||
*/
|
||||
|
||||
MagickExport void SeedPseudoRandomGenerator(const unsigned long seed)
|
||||
{
|
||||
SetRandomSecretKey(seed);
|
||||
}
|
||||
|
||||
MagickExport void SetRandomSecretKey(const unsigned long key)
|
||||
{
|
||||
secret_key=key;
|
||||
}
|
||||
|
||||
/*
|
||||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||
% %
|
||||
% %
|
||||
% %
|
||||
% S e t R a n d o m T r u e R a n d o m %
|
||||
% %
|
||||
% %
|
||||
% %
|
||||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||
%
|
||||
% SetRandomTrueRandom() declares your intentions to use true random numbers.
|
||||
% True random numbers are encouraged but may not always be practical because
|
||||
% your application may block while entropy is gathered from your environment.
|
||||
%
|
||||
% The format of the SetRandomTrueRandom method is:
|
||||
%
|
||||
% void SetRandomTrueRandom(const MagickBooleanType true_random)
|
||||
%
|
||||
% A description of each parameter follows:
|
||||
%
|
||||
% o true_random: declare your intentions to use true-random number.
|
||||
%
|
||||
*/
|
||||
MagickExport void SetRandomTrueRandom(const MagickBooleanType true_random)
|
||||
{
|
||||
gather_true_random=true_random;
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue