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mrcore.c
2293 lines (1986 loc) · 52.7 KB
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mrcore.c
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/***************************************************************************
*
Copyright 2013 CertiVox UK Ltd. *
*
This file is part of CertiVox MIRACL Crypto SDK. *
*
The CertiVox MIRACL Crypto SDK provides developers with an *
extensive and efficient set of cryptographic functions. *
For further information about its features and functionalities please *
refer to http://www.certivox.com *
*
* The CertiVox MIRACL Crypto SDK is free software: you can *
redistribute it and/or modify it under the terms of the *
GNU Affero General Public License as published by the *
Free Software Foundation, either version 3 of the License, *
or (at your option) any later version. *
*
* The CertiVox MIRACL Crypto SDK is distributed in the hope *
that it will be useful, but WITHOUT ANY WARRANTY; without even the *
implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. *
See the GNU Affero General Public License for more details. *
*
* You should have received a copy of the GNU Affero General Public *
License along with CertiVox MIRACL Crypto SDK. *
If not, see <http://www.gnu.org/licenses/>. *
*
You can be released from the requirements of the license by purchasing *
a commercial license. Buying such a license is mandatory as soon as you *
develop commercial activities involving the CertiVox MIRACL Crypto SDK *
without disclosing the source code of your own applications, or shipping *
the CertiVox MIRACL Crypto SDK with a closed source product. *
*
***************************************************************************/
/*
*
* MIRACL Core module - contains initialisation code and general purpose
* utilities
* mrcore.c
*
* Space can be saved by removing unneeded functions (mr_and ?)
*
*/
#include "miracl.h"
#include <stdlib.h>
#include <string.h>
#ifdef MR_FP
#include <math.h>
#endif
/*** Multi-Threaded Support ***/
#ifndef MR_GENERIC_MT
#ifdef MR_OPENMP_MT
#include <omp.h>
#define MR_MIP_EXISTS
miracl *mr_mip;
#pragma omp threadprivate(mr_mip)
miracl *get_mip()
{
return mr_mip;
}
void mr_init_threading()
{
}
void mr_end_threading()
{
}
#endif
#ifdef MR_WINDOWS_MT
#include <windows.h>
DWORD mr_key;
miracl *get_mip()
{
return (miracl *)TlsGetValue(mr_key);
}
void mr_init_threading()
{
mr_key=TlsAlloc();
}
void mr_end_threading()
{
TlsFree(mr_key);
}
#endif
#ifdef MR_UNIX_MT
#include <pthread.h>
pthread_key_t mr_key;
miracl *get_mip()
{
return (miracl *)pthread_getspecific(mr_key);
}
void mr_init_threading()
{
pthread_key_create(&mr_key,(void(*)(void *))NULL);
}
void mr_end_threading()
{
pthread_key_delete(mr_key);
}
#endif
#ifndef MR_WINDOWS_MT
#ifndef MR_UNIX_MT
#ifndef MR_OPENMP_MT
#ifdef MR_STATIC
miracl mip;
miracl *mr_mip=&mip;
#else
miracl *mr_mip=NULL; /* MIRACL's one and only global variable */
#endif
#define MR_MIP_EXISTS
miracl *get_mip()
{
return (miracl *)mr_mip;
}
#endif
#endif
#endif
#ifdef MR_MIP_EXISTS
void set_mip(miracl *mip)
{
mr_mip=mip;
}
#endif
#endif
/* See Advanced Windows by Jeffrey Richter, Chapter 12 for methods for
creating different instances of this global for each executing thread
when using Windows '95/NT
*/
#ifdef MR_STATIC
#if MIRACL==8
static const int mr_small_primes[]=
{2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97,101,103,
107,109,113,127,0};
#else
static const int mr_small_primes[]=
{2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97,101,103,
107,109,113,127,131,137,139,149,151,157,163,167,173,179,181,191,193,197,199,211,
223,227,229,233,239,241,251,257,263,269,271,277,281,283,293,307,311,313,317,331,
337,347,349,353,359,367,373,379,383,389,397,401,409,419,421,431,433,439,443,449,
457,461,463,467,479,487,491,499,503,509,521,523,541,547,557,563,569,571,577,587,
593,599,601,607,613,617,619,631,641,643,647,653,659,661,673,677,683,691,701,709,
719,727,733,739,743,751,757,761,769,773,787,797,809,811,821,823,827,829,839,853,
857,859,863,877,881,883,887,907,911,919,929,937,941,947,953,967,971,977,983,991,
997,0};
#endif
#endif
#ifndef MR_STRIPPED_DOWN
#ifndef MR_NO_STANDARD_IO
static char *names[] =
{(char *)"your program",(char *)"innum",(char *)"otnum",(char *)"jack",(char *)"normalise",
(char *)"multiply",(char *)"divide",(char *)"incr",(char *)"decr",(char *)"premult",
(char *)"subdiv",(char *)"fdsize",(char *)"egcd",(char *)"cbase",
(char *)"cinnum",(char *)"cotnum",(char *)"nroot",(char *)"power",
(char *)"powmod",(char *)"bigdig",(char *)"bigrand",(char *)"nxprime",(char *)"isprime",
(char *)"mirvar",(char *)"mad",(char *)"multi_inverse",(char *)"putdig",
(char *)"add",(char *)"subtract",(char *)"mirsys",(char *)"xgcd",
(char *)"fpack",(char *)"dconv",(char *)"mr_shift",(char *)"mround",(char *)"fmul",
(char *)"fdiv",(char *)"fadd",(char *)"fsub",(char *)"fcomp",(char *)"fconv",
(char *)"frecip",(char *)"fpmul",(char *)"fincr",(char *)"",(char *)"ftrunc",
(char *)"frand",(char *)"sftbit",(char *)"build",(char *)"logb2",(char *)"expint",
(char *)"fpower",(char *)"froot",(char *)"fpi",(char *)"fexp",(char *)"flog",(char *)"fpowf",
(char *)"ftan",(char *)"fatan",(char *)"fsin",(char *)"fasin",(char *)"fcos",(char *)"facos",
(char *)"ftanh",(char *)"fatanh",(char *)"fsinh",(char *)"fasinh",(char *)"fcosh",
(char *)"facosh",(char *)"flop",(char *)"gprime",(char *)"powltr",(char *)"fft_mult",
(char *)"crt_init",(char *)"crt",(char *)"otstr",(char *)"instr",(char *)"cotstr",(char *)"cinstr",(char *)"powmod2",
(char *)"prepare_monty",(char *)"nres",(char *)"redc",(char *)"nres_modmult",(char *)"nres_powmod",
(char *)"nres_moddiv",(char *)"nres_powltr",(char *)"divisible",(char *)"remain",
(char *)"fmodulo",(char *)"nres_modadd",(char *)"nres_modsub",(char *)"nres_negate",
(char *)"ecurve_init",(char *)"ecurve_add",(char *)"ecurve_mult",
(char *)"epoint_init",(char *)"epoint_set",(char *)"epoint_get",(char *)"nres_powmod2",
(char *)"nres_sqroot",(char *)"sqroot",(char *)"nres_premult",(char *)"ecurve_mult2",
(char *)"ecurve_sub",(char *)"trial_division",(char *)"nxsafeprime",(char *)"nres_lucas",(char *)"lucas",
(char *)"brick_init",(char *)"pow_brick",(char *)"set_user_function",
(char *)"nres_powmodn",(char *)"powmodn",(char *)"ecurve_multn",
(char *)"ebrick_init",(char *)"mul_brick",(char *)"epoint_norm",(char *)"nres_multi_inverse",(char *)"",
(char *)"nres_dotprod",(char *)"epoint_negate",(char *)"ecurve_multi_add",
(char *)"ecurve2_init",(char *)"",(char *)"epoint2_set",(char *)"epoint2_norm",(char *)"epoint2_get",
(char *)"epoint2_comp",(char *)"ecurve2_add",(char *)"epoint2_negate",(char *)"ecurve2_sub",
(char *)"ecurve2_multi_add",(char *)"ecurve2_mult",(char *)"ecurve2_multn",(char *)"ecurve2_mult2",
(char *)"ebrick2_init",(char *)"mul2_brick",(char *)"prepare_basis",(char *)"strong_bigrand",
(char *)"bytes_to_big",(char *)"big_to_bytes",(char *)"set_io_buffer_size",
(char *)"epoint_getxyz",(char *)"epoint_double_add",(char *)"nres_double_inverse",
(char *)"double_inverse",(char *)"epoint_x",(char *)"hamming",(char *)"expb2",(char *)"bigbits",
(char *)"nres_lazy",(char *)"zzn2_imul",(char *)"nres_double_modadd",(char *)"nres_double_modsub",
/*155*/(char *)"",(char *)"zzn2_from_int",(char *)"zzn2_negate",(char *)"zzn2_conj",(char *)"zzn2_add",
(char *)"zzn2_sub",(char *)"zzn2_smul",(char *)"zzn2_mul",(char *)"zzn2_inv",(char *)"zzn2_timesi",(char *)"zzn2_powl",
(char *)"zzn2_from_bigs",(char *)"zzn2_from_big",(char *)"zzn2_from_ints",
(char *)"zzn2_sadd",(char *)"zzn2_ssub",(char *)"zzn2_times_irp",(char *)"zzn2_div2",
(char *)"zzn3_from_int",(char *)"zzn3_from_ints",(char *)"zzn3_from_bigs",
(char *)"zzn3_from_big",(char *)"zzn3_negate",(char *)"zzn3_powq",(char *)"zzn3_init",
(char *)"zzn3_add",(char *)"zzn3_sadd",(char *)"zzn3_sub",(char *)"zzn3_ssub",(char *)"zzn3_smul",
(char *)"zzn3_imul",(char *)"zzn3_mul",(char *)"zzn3_inv",(char *)"zzn3_div2",(char *)"zzn3_timesi",
(char *)"epoint_multi_norm",(char *)"mr_jsf",(char *)"epoint2_multi_norm",
(char *)"ecn2_compare",(char *)"ecn2_norm",(char *)"ecn2_set",(char *)"zzn2_txx",
(char *)"zzn2_txd",(char *)"nres_div2",(char *)"nres_div3",(char *)"zzn2_div3",
(char *)"ecn2_setx",(char *)"ecn2_rhs",(char *)"zzn2_qr",(char *)"zzn2_sqrt",(char *)"ecn2_add",(char *)"ecn2_mul2_jsf",(char *)"ecn2_mul",
(char *)"nres_div5",(char *)"zzn2_div5",(char *)"zzn2_sqr",(char *)"ecn2_add_sub",(char *)"ecn2_psi",(char *)"invmodp",
(char *)"zzn2_multi_inverse",(char *)"ecn2_multi_norm",(char *)"ecn2_precomp",(char *)"ecn2_mul4_gls_v",
(char *)"ecn2_mul2",(char *)"ecn2_precomp_gls",(char *)"ecn2_mul2_gls",
(char *)"ecn2_brick_init",(char *)"ecn2_mul_brick_gls",(char *)"ecn2_multn",(char *)"zzn3_timesi2",
(char *)"nres_complex",(char *)"zzn4_from_int",(char *)"zzn4_negate",(char *)"zzn4_conj",(char *)"zzn4_add",(char *)"zzn4_sadd",(char *)"zzn4_sub",(char *)"zzn4_ssub",(char *)"zzn4_smul",(char *)"zzn4_sqr",
(char *)"zzn4_mul",(char *)"zzn4_inv",(char *)"zzn4_div2",(char *)"zzn4_powq",(char *)"zzn4_tx",(char *)"zzn4_imul",(char *)"zzn4_lmul",(char *)"zzn4_from_big",
(char *)"ecn2_mult4"};
/* 0 - 243 (244 in all) */
#endif
#endif
#ifdef MR_NOASM
/* C only versions of muldiv/muldvd/muldvd2/muldvm */
/* Note that mr_large should be twice the size of mr_small */
mr_small muldiv(mr_small a,mr_small b,mr_small c,mr_small m,mr_small *rp)
{
mr_small q;
mr_large ldres,p=(mr_large)a*b+c;
q=(mr_small)(MR_LROUND(p/m));
*rp=(mr_small)(p-(mr_large)q*m);
return q;
}
#ifdef MR_FP_ROUNDING
mr_small imuldiv(mr_small a,mr_small b,mr_small c,mr_small m,mr_large im,mr_small *rp)
{
mr_small q;
mr_large ldres,p=(mr_large)a*b+c;
q=(mr_small)MR_LROUND(p*im);
*rp=(mr_small)(p-(mr_large)q*m);
return q;
}
#endif
#ifndef MR_NOFULLWIDTH
mr_small muldvm(mr_small a,mr_small c,mr_small m,mr_small *rp)
{
mr_small q;
union doubleword dble;
dble.h[MR_BOT]=c;
dble.h[MR_TOP]=a;
q=(mr_small)(dble.d/m);
*rp=(mr_small)(dble.d-(mr_large)q*m);
return q;
}
mr_small muldvd(mr_small a,mr_small b,mr_small c,mr_small *rp)
{
union doubleword dble;
dble.d=(mr_large)a*b+c;
*rp=dble.h[MR_BOT];
return dble.h[MR_TOP];
}
void muldvd2(mr_small a,mr_small b,mr_small *c,mr_small *rp)
{
union doubleword dble;
dble.d=(mr_large)a*b+*c+*rp;
*rp=dble.h[MR_BOT];
*c=dble.h[MR_TOP];
}
#endif
#endif
#ifdef MR_NOFULLWIDTH
/* no FULLWIDTH working, so supply dummies */
/*
mr_small muldvd(mr_small a,mr_small b,mr_small c,mr_small *rp)
{
return (mr_small)0;
}
mr_small muldvm(mr_small a,mr_small c,mr_small m,mr_small *rp)
{
return (mr_small)0;
}
void muldvd2(mr_small a,mr_small b,mr_small *c,mr_small *rp)
{
}
*/
#endif
#ifndef MR_NO_STANDARD_IO
static void mputs(char *s)
{ /* output a string */
int i=0;
while (s[i]!=0) fputc((int)s[i++],stdout);
}
#endif
void mr_berror(_MIPD_ int nerr)
{ /* Big number error routine */
#ifndef MR_STRIPPED_DOWN
int i;
#endif
#ifdef MR_OS_THREADS
miracl *mr_mip=get_mip();
#endif
if (mr_mip->ERCON)
{
mr_mip->ERNUM=nerr;
return;
}
#ifndef MR_NO_STANDARD_IO
#ifndef MR_STRIPPED_DOWN
mputs((char *)"\nMIRACL error from routine ");
if (mr_mip->depth<MR_MAXDEPTH) mputs(names[mr_mip->trace[mr_mip->depth]]);
else mputs((char *)"???");
fputc('\n',stdout);
for (i=mr_mip->depth-1;i>=0;i--)
{
mputs((char *)" called from ");
if (i<MR_MAXDEPTH) mputs(names[mr_mip->trace[i]]);
else mputs((char *)"???");
fputc('\n',stdout);
}
switch (nerr)
{
case 1 :
mputs((char *)"Number base too big for representation\n");
break;
case 2 :
mputs((char *)"Division by zero attempted\n");
break;
case 3 :
mputs((char *)"Overflow - Number too big\n");
break;
case 4 :
mputs((char *)"Internal result is negative\n");
break;
case 5 :
mputs((char *)"Input format error\n");
break;
case 6 :
mputs((char *)"Illegal number base\n");
break;
case 7 :
mputs((char *)"Illegal parameter usage\n");
break;
case 8 :
mputs((char *)"Out of space\n");
break;
case 9 :
mputs((char *)"Even root of a negative number\n");
break;
case 10:
mputs((char *)"Raising integer to negative power\n");
break;
case 11:
mputs((char *)"Attempt to take illegal root\n");
break;
case 12:
mputs((char *)"Integer operation attempted on Flash number\n");
break;
case 13:
mputs((char *)"Flash overflow\n");
break;
case 14:
mputs((char *)"Numbers too big\n");
break;
case 15:
mputs((char *)"Log of a non-positive number\n");
break;
case 16:
mputs((char *)"Flash to double conversion failure\n");
break;
case 17:
mputs((char *)"I/O buffer overflow\n");
break;
case 18:
mputs((char *)"MIRACL not initialised - no call to mirsys()\n");
break;
case 19:
mputs((char *)"Illegal modulus \n");
break;
case 20:
mputs((char *)"No modulus defined\n");
break;
case 21:
mputs((char *)"Exponent too big\n");
break;
case 22:
mputs((char *)"Unsupported Feature - check mirdef.h\n");
break;
case 23:
mputs((char *)"Specified double length type isn't double length\n");
break;
case 24:
mputs((char *)"Specified basis is NOT irreducible\n");
break;
case 25:
mputs((char *)"Unable to control Floating-point rounding\n");
break;
case 26:
mputs((char *)"Base must be binary (MR_ALWAYS_BINARY defined in mirdef.h ?)\n");
break;
case 27:
mputs((char *)"No irreducible basis defined\n");
break;
case 28:
mputs((char *)"Composite modulus\n");
break;
case 29:
mputs((char *)"Input/output error when reading from RNG device node\n");
break;
default:
mputs((char *)"Undefined error\n");
break;
}
exit(0);
#else
mputs((char *)"MIRACL error\n");
exit(0);
#endif
#endif
}
#ifndef MR_STRIPPED_DOWN
void mr_track(_MIPDO_ )
{ /* track course of program execution *
* through the MIRACL routines */
#ifndef MR_NO_STANDARD_IO
int i;
#ifdef MR_OS_THREADS
miracl *mr_mip=get_mip();
#endif
for (i=0;i<mr_mip->depth;i++) fputc('-',stdout);
fputc('>',stdout);
mputs(names[mr_mip->trace[mr_mip->depth]]);
fputc('\n',stdout);
#endif
}
#endif
#ifndef MR_NO_RAND
mr_small brand(_MIPDO_ )
{ /* Marsaglia & Zaman random number generator */
int i,k;
mr_unsign32 pdiff,t;
mr_small r;
#ifdef MR_OS_THREADS
miracl *mr_mip=get_mip();
#endif
if (mr_mip->lg2b>32)
{ /* underlying type is > 32 bits. Assume <= 64 bits */
mr_mip->rndptr+=2;
if (mr_mip->rndptr<NK-1)
{
r=(mr_small)mr_mip->ira[mr_mip->rndptr];
r=mr_shiftbits(r,mr_mip->lg2b-32);
r+=(mr_small)mr_mip->ira[mr_mip->rndptr+1];
return r;
}
}
else
{
mr_mip->rndptr++;
if (mr_mip->rndptr<NK) return (mr_small)mr_mip->ira[mr_mip->rndptr];
}
mr_mip->rndptr=0;
for (i=0,k=NK-NJ;i<NK;i++,k++)
{ /* calculate next NK values */
if (k==NK) k=0;
t=mr_mip->ira[k];
pdiff=t - mr_mip->ira[i] - mr_mip->borrow;
if (pdiff<t) mr_mip->borrow=0;
if (pdiff>t) mr_mip->borrow=1;
mr_mip->ira[i]=pdiff;
}
if (mr_mip->lg2b>32)
{ /* double up */
r=(mr_small)mr_mip->ira[0];
r=mr_shiftbits(r,mr_mip->lg2b-32);
r+=(mr_small)mr_mip->ira[1];
return r;
}
else return (mr_small)(mr_mip->ira[0]);
}
void irand(_MIPD_ mr_unsign32 seed)
{ /* initialise random number system */
int i,in;
mr_unsign32 t,m=1L;
#ifdef MR_OS_THREADS
miracl *mr_mip=get_mip();
#endif
mr_mip->borrow=0L;
mr_mip->rndptr=0;
mr_mip->ira[0]=seed;
for (i=1;i<NK;i++)
{ /* fill initialisation vector */
in=(NV*i)%NK;
mr_mip->ira[in]=m;
t=m;
m=seed-m;
seed=t;
}
for (i=0;i<1000;i++) brand(_MIPPO_ ); /* "warm-up" & stir the generator */
}
#endif
mr_small mr_shiftbits(mr_small x,int n)
{
#ifdef MR_FP
int i;
mr_small dres;
if (n==0) return x;
if (n>0)
{
for (i=0;i<n;i++) x=x+x;
return x;
}
n=-n;
for (i=0;i<n;i++) x=MR_DIV(x,2.0);
return x;
#else
if (n==0) return x;
if (n>0) x<<=n;
else x>>=(-n);
return x;
#endif
}
mr_small mr_setbase(_MIPD_ mr_small nb)
{ /* set base. Pack as many digits as *
* possible into each computer word */
mr_small temp;
#ifdef MR_FP
mr_small dres;
#endif
#ifndef MR_NOFULLWIDTH
BOOL fits;
int bits;
#ifdef MR_OS_THREADS
miracl *mr_mip=get_mip();
#endif
fits=FALSE;
bits=MIRACL;
while (bits>1)
{
bits/=2;
temp=((mr_small)1<<bits);
if (temp==nb)
{
fits=TRUE;
break;
}
if (temp<nb || (bits%2)!=0) break;
}
if (fits)
{
mr_mip->apbase=nb;
mr_mip->pack=MIRACL/bits;
mr_mip->base=0;
return 0;
}
#endif
mr_mip->apbase=nb;
mr_mip->pack=1;
mr_mip->base=nb;
#ifdef MR_SIMPLE_BASE
return 0;
#else
if (mr_mip->base==0) return 0;
temp=MR_DIV(MAXBASE,nb);
while (temp>=nb)
{
temp=MR_DIV(temp,nb);
mr_mip->base*=nb;
mr_mip->pack++;
}
#ifdef MR_FP_ROUNDING
mr_mip->inverse_base=mr_invert(mr_mip->base);
return mr_mip->inverse_base;
#else
return 0;
#endif
#endif
}
#ifdef MR_FLASH
BOOL fit(big x,big y,int f)
{ /* returns TRUE if x/y would fit flash format of length f */
int n,d;
n=(int)(x->len&(MR_OBITS));
d=(int)(y->len&(MR_OBITS));
if (n==1 && x->w[0]==1) n=0;
if (d==1 && y->w[0]==1) d=0;
if (n+d<=f) return TRUE;
return FALSE;
}
#endif
int mr_lent(flash x)
{ /* return length of big or flash in words */
mr_lentype lx;
lx=(x->len&(MR_OBITS));
#ifdef MR_FLASH
return (int)((lx&(MR_MSK))+((lx>>(MR_BTS))&(MR_MSK)));
#else
return (int)lx;
#endif
}
void zero(flash x)
{ /* set big/flash number to zero */
int i,n;
mr_small *g;
if (x==NULL) return;
#ifdef MR_FLASH
n=mr_lent(x);
#else
n=(x->len&MR_OBITS);
#endif
g=x->w;
for (i=0;i<n;i++)
g[i]=0;
x->len=0;
}
void uconvert(_MIPD_ unsigned int n ,big x)
{ /* convert unsigned integer n to big number format */
int m;
#ifdef MR_FP
mr_small dres;
#endif
#ifdef MR_OS_THREADS
miracl *mr_mip=get_mip();
#endif
zero(x);
if (n==0) return;
m=0;
#ifndef MR_SIMPLE_BASE
if (mr_mip->base==0)
{
#endif
#ifndef MR_NOFULLWIDTH
#if MR_IBITS > MIRACL
while (n>0)
{
x->w[m++]=(mr_small)(n%((mr_small)1<<(MIRACL)));
n/=((mr_small)1<<(MIRACL));
}
#else
x->w[m++]=(mr_small)n;
#endif
#endif
#ifndef MR_SIMPLE_BASE
}
else while (n>0)
{
x->w[m++]=MR_REMAIN((mr_small)n,mr_mip->base);
n=(unsigned int)((mr_small)n/mr_mip->base);
}
#endif
x->len=m;
}
void tconvert(_MIPD_ mr_utype n,big x)
{
mr_lentype s;
#ifdef MR_OS_THREADS
miracl *mr_mip=get_mip();
#endif
if (n==0) {zero(x); return;}
s=0;
if (n<0)
{
s=MR_MSBIT;
n=(-n);
}
x->w[0]=n;
x->len=1;
x->len|=s;
}
void convert(_MIPD_ int n ,big x)
{ /* convert signed integer n to big number format */
mr_lentype s;
#ifdef MR_OS_THREADS
miracl *mr_mip=get_mip();
#endif
if (n==0) {zero(x); return;}
s=0;
if (n<0)
{
s=MR_MSBIT;
n=(-n);
}
uconvert(_MIPP_ (unsigned int)n,x);
x->len|=s;
}
#ifndef MR_STATIC
#ifdef mr_dltype
void dlconv(_MIPD_ mr_dltype n,big x)
{ /* convert double length integer to big number format - rarely needed */
int m;
mr_lentype s;
#ifdef MR_FP
mr_small dres;
#endif
#ifdef MR_OS_THREADS
miracl *mr_mip=get_mip();
#endif
zero(x);
if (n==0) return;
s=0;
if (n<0)
{
s=MR_MSBIT;
n=(-n);
}
m=0;
#ifndef MR_SIMPLE_BASE
if (mr_mip->base==0)
{
#endif
#ifndef MR_NOFULLWIDTH
while (n>0)
{
x->w[m++]=(mr_small)(n%((mr_dltype)1<<(MIRACL)));
n/=((mr_dltype)1<<(MIRACL));
}
#endif
#ifndef MR_SIMPLE_BASE
}
else while (n>0)
{
x->w[m++]=(mr_small)MR_REMAIN(n,mr_mip->base);
n/=mr_mip->base;
}
#endif
x->len=(m|s);
}
#endif
void ulgconv(_MIPD_ unsigned long n,big x)
{ /* convert unsigned long integer to big number format - rarely needed */
int m;
#ifdef MR_FP
mr_small dres;
#endif
#ifdef MR_OS_THREADS
miracl *mr_mip=get_mip();
#endif
zero(x);
if (n==0) return;
m=0;
#ifndef MR_SIMPLE_BASE
if (mr_mip->base==0)
{
#endif
#ifndef MR_NOFULLWIDTH
#if MR_LBITS > MIRACL
while (n>0)
{
x->w[m++]=(mr_small)(n%(1L<<(MIRACL)));
n/=(1L<<(MIRACL));
}
#else
x->w[m++]=(mr_small)n;
#endif
#endif
#ifndef MR_SIMPLE_BASE
}
else while (n>0)
{
x->w[m++]=MR_REMAIN(n,mr_mip->base);
n=(unsigned long)((mr_small)n/mr_mip->base);
}
#endif
x->len=m;
}
void lgconv(_MIPD_ long n,big x)
{ /* convert signed long integer to big number format - rarely needed */
mr_lentype s;
#ifdef MR_OS_THREADS
miracl *mr_mip=get_mip();
#endif
if (n==0) {zero(x); return;}
s=0;
if (n<0)
{
s=MR_MSBIT;
n=(-n);
}
ulgconv(_MIPP_ (unsigned long)n,x);
x->len|=s;
}
flash mirvar(_MIPD_ int iv)
{ /* initialize big/flash number */
flash x;
int align;
char *ptr;
#ifdef MR_OS_THREADS
miracl *mr_mip=get_mip();
#endif
if (mr_mip->ERNUM) return NULL;
MR_IN(23);
if (!(mr_mip->active))
{
mr_berror(_MIPP_ MR_ERR_NO_MIRSYS);
MR_OUT
return NULL;
}
/* OK, now I control alignment.... */
/* Allocate space for big, the length, the pointer, and the array */
/* Do it all in one memory allocation - this is quicker */
/* Ensure that the array has correct alignment */
x=(big)mr_alloc(_MIPP_ mr_size(mr_mip->nib-1),1);
if (x==NULL)
{
MR_OUT
return x;
}
ptr=(char *)&x->w;
align=(unsigned long)(ptr+sizeof(mr_small *))%sizeof(mr_small);
x->w=(mr_small *)(ptr+sizeof(mr_small *)+sizeof(mr_small)-align);
if (iv!=0) convert(_MIPP_ iv,x);
MR_OUT
return x;
}
#endif
flash mirvar_mem_variable(char *mem,int index,int sz)
{
flash x;
int align;
char *ptr;
int offset,r;
/* alignment */
offset=0;
r=(unsigned long)mem%MR_SL;
if (r>0) offset=MR_SL-r;
x=(big)&mem[offset+mr_size(sz)*index];
ptr=(char *)&x->w;
align=(unsigned long)(ptr+sizeof(mr_small *))%sizeof(mr_small);
x->w=(mr_small *)(ptr+sizeof(mr_small *)+sizeof(mr_small)-align);
return x;
}
flash mirvar_mem(_MIPD_ char *mem,int index)
{ /* initialize big/flash number from pre-allocated memory */
#ifdef MR_OS_THREADS
miracl *mr_mip=get_mip();
#endif
if (mr_mip->ERNUM) return NULL;
return mirvar_mem_variable(mem,index,mr_mip->nib-1);
}
void set_user_function(_MIPD_ BOOL (*user)(void))
{
#ifdef MR_OS_THREADS
miracl *mr_mip=get_mip();
#endif
if (mr_mip->ERNUM) return;
MR_IN(111)
if (!(mr_mip->active))
{
mr_berror(_MIPP_ MR_ERR_NO_MIRSYS);
MR_OUT
return;
}
mr_mip->user=user;
MR_OUT
}
#ifndef MR_STATIC
#ifndef MR_SIMPLE_IO
void set_io_buffer_size(_MIPD_ int len)
{
int i;
#ifdef MR_OS_THREADS
miracl *mr_mip=get_mip();
#endif
if (len<0) return;
MR_IN(142)
for (i=0;i<mr_mip->IOBSIZ;i++) mr_mip->IOBUFF[i]=0;
mr_free(mr_mip->IOBUFF);
if (len==0)
{
MR_OUT
return;
}
mr_mip->IOBSIZ=len;
mr_mip->IOBUFF=(char *)mr_alloc(_MIPP_ len+1,1);
mr_mip->IOBUFF[0]='\0';
MR_OUT
}
#endif
#endif
/* Initialise a big from ROM given its fixed length */
BOOL init_big_from_rom(big x,int len,const mr_small *rom,int romsize,int *romptr)
{
int i;
zero(x);
x->len=len;
for (i=0;i<len;i++)
{
if (*romptr>=romsize) return FALSE;
#ifdef MR_AVR