Mercurial > dropbear
annotate libtommath/tommath.h @ 1306:34e6127ef02e
merge fixes from PuTTY import.c
toint() from misc.c
(revids are from hggit conversion)
changeset: 4620:60a336a6c85c
user: Simon Tatham <[email protected]>
date: Thu Feb 25 20:26:33 2016 +0000
files: import.c
description:
Fix potential segfaults in reading OpenSSH's ASN.1 key format.
The length coming back from ber_read_id_len might have overflowed, so
treat it as potentially negative. Also, while I'm here, accumulate it
inside ber_read_id_len as an unsigned, so as to avoid undefined
behaviour on integer overflow, and toint() it before return.
Thanks to Hanno Böck for spotting this, with the aid of AFL.
(cherry picked from commit 5b7833cd474a24ec098654dcba8cb9509f3bf2c1)
Conflicts:
import.c
(cherry-picker's note: resolving the conflict involved removing an
entire section of the original commit which fixed ECDSA code not
present on this branch)
changeset: 4619:9c6c638d98d8
user: Simon Tatham <[email protected]>
date: Sun Jul 14 10:45:54 2013 +0000
files: import.c ssh.c sshdss.c sshpubk.c sshrsa.c
description:
Tighten up a lot of casts from unsigned to int which are read by one
of the GET_32BIT macros and then used as length fields. Missing bounds
checks against zero have been added, and also I've introduced a helper
function toint() which casts from unsigned to int in such a way as to
avoid C undefined behaviour, since I'm not sure I trust compilers any
more to do the obviously sensible thing.
[originally from svn r9918]
changeset: 4618:3957829f24d3
user: Simon Tatham <[email protected]>
date: Mon Jul 08 22:36:04 2013 +0000
files: import.c sshdss.c sshrsa.c
description:
Add an assortment of extra safety checks.
[originally from svn r9896]
changeset: 4617:2cddee0bce12
user: Jacob Nevins <[email protected]>
date: Wed Dec 07 00:24:45 2005 +0000
files: import.c
description:
Institutional failure to memset() things pointed at rather than pointers.
Things should now be zeroed and memory not leaked. Spotted by Brant Thomsen.
[originally from svn r6476]
changeset: 4616:24ac78a9c71d
user: Simon Tatham <[email protected]>
date: Wed Feb 11 13:58:27 2004 +0000
files: import.c
description:
Jacob's last-minute testing found a couple of trivial bugs in
import.c, and my attempts to reproduce them in cmdgen found another
one there :-)
[originally from svn r3847]
changeset: 4615:088d39a73db0
user: Simon Tatham <[email protected]>
date: Thu Jan 22 18:52:49 2004 +0000
files: import.c
description:
Placate some gcc warnings.
[originally from svn r3761]
changeset: 4614:e4288bad4d93
parent: 1758:108b8924593d
user: Simon Tatham <[email protected]>
date: Fri Oct 03 21:21:23 2003 +0000
files: import.c
description:
My ASN.1 decoder returned wrong IDs for anything above 0x1E! Good
job it's never had to yet. Ahem.
[originally from svn r3479]
author | Matt Johnston <matt@ucc.asn.au> |
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date | Tue, 12 Jul 2016 23:00:01 +0800 |
parents | 5ff8218bcee9 |
children | 60fc6476e044 |
rev | line source |
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1 /* LibTomMath, multiple-precision integer library -- Tom St Denis |
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2 * |
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3 * LibTomMath is a library that provides multiple-precision |
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4 * integer arithmetic as well as number theoretic functionality. |
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5 * |
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6 * The library was designed directly after the MPI library by |
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7 * Michael Fromberger but has been written from scratch with |
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8 * additional optimizations in place. |
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9 * |
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10 * The library is free for all purposes without any express |
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11 * guarantee it works. |
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12 * |
389
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13 * Tom St Denis, [email protected], http://math.libtomcrypt.com |
284
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14 */ |
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15 #ifndef BN_H_ |
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16 #define BN_H_ |
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17 |
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18 #include <stdio.h> |
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19 #include <string.h> |
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20 #include <stdlib.h> |
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21 #include <ctype.h> |
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22 #include <limits.h> |
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23 |
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24 #include "tommath_class.h" |
284
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25 |
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26 #ifndef MIN |
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27 #define MIN(x,y) ((x)<(y)?(x):(y)) |
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28 #endif |
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29 |
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30 #ifndef MAX |
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31 #define MAX(x,y) ((x)>(y)?(x):(y)) |
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32 #endif |
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33 |
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34 #ifdef __cplusplus |
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35 extern "C" { |
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36 |
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37 /* C++ compilers don't like assigning void * to mp_digit * */ |
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38 #define OPT_CAST(x) (x *) |
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39 |
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40 #else |
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41 |
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42 /* C on the other hand doesn't care */ |
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43 #define OPT_CAST(x) |
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44 |
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45 #endif |
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46 |
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47 |
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48 /* detect 64-bit mode if possible */ |
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49 #if defined(__x86_64__) |
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50 #if !(defined(MP_64BIT) && defined(MP_16BIT) && defined(MP_8BIT)) |
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51 #define MP_64BIT |
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52 #endif |
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53 #endif |
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54 |
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55 /* some default configurations. |
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56 * |
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57 * A "mp_digit" must be able to hold DIGIT_BIT + 1 bits |
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58 * A "mp_word" must be able to hold 2*DIGIT_BIT + 1 bits |
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59 * |
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60 * At the very least a mp_digit must be able to hold 7 bits |
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61 * [any size beyond that is ok provided it doesn't overflow the data type] |
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62 */ |
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63 #ifdef MP_8BIT |
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64 typedef unsigned char mp_digit; |
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65 typedef unsigned short mp_word; |
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66 #elif defined(MP_16BIT) |
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67 typedef unsigned short mp_digit; |
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68 typedef unsigned long mp_word; |
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69 #elif defined(MP_64BIT) |
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70 /* for GCC only on supported platforms */ |
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71 #ifndef CRYPT |
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72 typedef unsigned long long ulong64; |
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73 typedef signed long long long64; |
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74 #endif |
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75 |
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76 typedef unsigned long mp_digit; |
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77 typedef unsigned long mp_word __attribute__ ((mode(TI))); |
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78 |
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79 #define DIGIT_BIT 60 |
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80 #else |
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81 /* this is the default case, 28-bit digits */ |
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82 |
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83 /* this is to make porting into LibTomCrypt easier :-) */ |
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84 #ifndef CRYPT |
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85 #if defined(_MSC_VER) || defined(__BORLANDC__) |
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86 typedef unsigned __int64 ulong64; |
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87 typedef signed __int64 long64; |
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88 #else |
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89 typedef unsigned long long ulong64; |
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90 typedef signed long long long64; |
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91 #endif |
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92 #endif |
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93 |
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94 typedef unsigned long mp_digit; |
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95 typedef ulong64 mp_word; |
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96 |
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97 #ifdef MP_31BIT |
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98 /* this is an extension that uses 31-bit digits */ |
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99 #define DIGIT_BIT 31 |
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100 #else |
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101 /* default case is 28-bit digits, defines MP_28BIT as a handy macro to test */ |
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102 #define DIGIT_BIT 28 |
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103 #define MP_28BIT |
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104 #endif |
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105 #endif |
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106 |
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107 /* define heap macros */ |
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108 #ifndef CRYPT |
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109 /* default to libc stuff */ |
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110 #ifndef XMALLOC |
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111 #define XMALLOC malloc |
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112 #define XFREE free |
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113 #define XREALLOC realloc |
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114 #define XCALLOC calloc |
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115 #else |
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116 /* prototypes for our heap functions */ |
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117 extern void *XMALLOC(size_t n); |
389
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118 extern void *XREALLOC(void *p, size_t n); |
284
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119 extern void *XCALLOC(size_t n, size_t s); |
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120 extern void XFREE(void *p); |
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121 #endif |
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122 #endif |
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123 |
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124 |
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125 /* otherwise the bits per digit is calculated automatically from the size of a mp_digit */ |
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126 #ifndef DIGIT_BIT |
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127 #define DIGIT_BIT ((int)((CHAR_BIT * sizeof(mp_digit) - 1))) /* bits per digit */ |
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128 #endif |
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129 |
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130 #define MP_DIGIT_BIT DIGIT_BIT |
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131 #define MP_MASK ((((mp_digit)1)<<((mp_digit)DIGIT_BIT))-((mp_digit)1)) |
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132 #define MP_DIGIT_MAX MP_MASK |
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133 |
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134 /* equalities */ |
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135 #define MP_LT -1 /* less than */ |
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136 #define MP_EQ 0 /* equal to */ |
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137 #define MP_GT 1 /* greater than */ |
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138 |
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139 #define MP_ZPOS 0 /* positive integer */ |
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140 #define MP_NEG 1 /* negative */ |
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141 |
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142 #define MP_OKAY 0 /* ok result */ |
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143 #define MP_MEM -2 /* out of mem */ |
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144 #define MP_VAL -3 /* invalid input */ |
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145 #define MP_RANGE MP_VAL |
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146 |
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147 #define MP_YES 1 /* yes response */ |
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148 #define MP_NO 0 /* no response */ |
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149 |
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150 /* Primality generation flags */ |
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151 #define LTM_PRIME_BBS 0x0001 /* BBS style prime */ |
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152 #define LTM_PRIME_SAFE 0x0002 /* Safe prime (p-1)/2 == prime */ |
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153 #define LTM_PRIME_2MSB_ON 0x0008 /* force 2nd MSB to 1 */ |
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154 |
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155 typedef int mp_err; |
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156 |
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157 /* you'll have to tune these... */ |
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158 extern int KARATSUBA_MUL_CUTOFF, |
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159 KARATSUBA_SQR_CUTOFF, |
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160 TOOM_MUL_CUTOFF, |
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161 TOOM_SQR_CUTOFF; |
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162 |
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163 /* define this to use lower memory usage routines (exptmods mostly) */ |
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164 /* #define MP_LOW_MEM */ |
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165 |
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166 /* default precision */ |
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167 #ifndef MP_PREC |
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168 #ifndef MP_LOW_MEM |
389
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169 #define MP_PREC 32 /* default digits of precision */ |
284
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170 #else |
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171 #define MP_PREC 8 /* default digits of precision */ |
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172 #endif |
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173 #endif |
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174 |
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175 /* size of comba arrays, should be at least 2 * 2**(BITS_PER_WORD - BITS_PER_DIGIT*2) */ |
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176 #define MP_WARRAY (1 << (sizeof(mp_word) * CHAR_BIT - 2 * DIGIT_BIT + 1)) |
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177 |
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178 /* the infamous mp_int structure */ |
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179 typedef struct { |
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180 int used, alloc, sign; |
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181 mp_digit *dp; |
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182 } mp_int; |
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183 |
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184 /* callback for mp_prime_random, should fill dst with random bytes and return how many read [upto len] */ |
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185 typedef int ltm_prime_callback(unsigned char *dst, int len, void *dat); |
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186 |
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187 |
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188 #define USED(m) ((m)->used) |
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189 #define DIGIT(m,k) ((m)->dp[(k)]) |
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190 #define SIGN(m) ((m)->sign) |
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191 |
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192 /* error code to char* string */ |
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193 char *mp_error_to_string(int code); |
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194 |
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195 /* ---> init and deinit bignum functions <--- */ |
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196 /* init a bignum */ |
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197 int mp_init(mp_int *a); |
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198 |
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199 /* free a bignum */ |
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200 void mp_clear(mp_int *a); |
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201 |
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202 /* init a null terminated series of arguments */ |
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203 int mp_init_multi(mp_int *mp, ...); |
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204 |
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205 /* clear a null terminated series of arguments */ |
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206 void mp_clear_multi(mp_int *mp, ...); |
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207 |
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208 /* exchange two ints */ |
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209 void mp_exch(mp_int *a, mp_int *b); |
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210 |
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211 /* shrink ram required for a bignum */ |
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212 int mp_shrink(mp_int *a); |
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213 |
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214 /* grow an int to a given size */ |
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215 int mp_grow(mp_int *a, int size); |
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216 |
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217 /* init to a given number of digits */ |
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218 int mp_init_size(mp_int *a, int size); |
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219 |
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220 /* ---> Basic Manipulations <--- */ |
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221 #define mp_iszero(a) (((a)->used == 0) ? MP_YES : MP_NO) |
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222 #define mp_iseven(a) (((a)->used > 0 && (((a)->dp[0] & 1) == 0)) ? MP_YES : MP_NO) |
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223 #define mp_isodd(a) (((a)->used > 0 && (((a)->dp[0] & 1) == 1)) ? MP_YES : MP_NO) |
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224 |
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225 /* set to zero */ |
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226 void mp_zero(mp_int *a); |
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227 |
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228 /* set to a digit */ |
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229 void mp_set(mp_int *a, mp_digit b); |
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230 |
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231 /* set a 32-bit const */ |
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232 int mp_set_int(mp_int *a, unsigned long b); |
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233 |
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234 /* get a 32-bit value */ |
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235 unsigned long mp_get_int(mp_int * a); |
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236 |
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237 /* initialize and set a digit */ |
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238 int mp_init_set (mp_int * a, mp_digit b); |
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239 |
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240 /* initialize and set 32-bit value */ |
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241 int mp_init_set_int (mp_int * a, unsigned long b); |
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242 |
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243 /* copy, b = a */ |
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244 int mp_copy(mp_int *a, mp_int *b); |
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245 |
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246 /* inits and copies, a = b */ |
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247 int mp_init_copy(mp_int *a, mp_int *b); |
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248 |
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249 /* trim unused digits */ |
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250 void mp_clamp(mp_int *a); |
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251 |
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252 /* ---> digit manipulation <--- */ |
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253 |
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254 /* right shift by "b" digits */ |
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255 void mp_rshd(mp_int *a, int b); |
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256 |
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257 /* left shift by "b" digits */ |
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258 int mp_lshd(mp_int *a, int b); |
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259 |
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260 /* c = a / 2**b */ |
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261 int mp_div_2d(mp_int *a, int b, mp_int *c, mp_int *d); |
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262 |
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263 /* b = a/2 */ |
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264 int mp_div_2(mp_int *a, mp_int *b); |
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265 |
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266 /* c = a * 2**b */ |
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267 int mp_mul_2d(mp_int *a, int b, mp_int *c); |
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268 |
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269 /* b = a*2 */ |
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270 int mp_mul_2(mp_int *a, mp_int *b); |
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271 |
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272 /* c = a mod 2**d */ |
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273 int mp_mod_2d(mp_int *a, int b, mp_int *c); |
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274 |
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275 /* computes a = 2**b */ |
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276 int mp_2expt(mp_int *a, int b); |
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277 |
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278 /* Counts the number of lsbs which are zero before the first zero bit */ |
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279 int mp_cnt_lsb(mp_int *a); |
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280 |
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281 /* I Love Earth! */ |
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282 |
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283 /* makes a pseudo-random int of a given size */ |
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284 int mp_rand(mp_int *a, int digits); |
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285 |
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286 /* ---> binary operations <--- */ |
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287 /* c = a XOR b */ |
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288 int mp_xor(mp_int *a, mp_int *b, mp_int *c); |
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289 |
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290 /* c = a OR b */ |
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291 int mp_or(mp_int *a, mp_int *b, mp_int *c); |
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292 |
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293 /* c = a AND b */ |
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294 int mp_and(mp_int *a, mp_int *b, mp_int *c); |
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295 |
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296 /* ---> Basic arithmetic <--- */ |
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297 |
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298 /* b = -a */ |
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299 int mp_neg(mp_int *a, mp_int *b); |
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300 |
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301 /* b = |a| */ |
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302 int mp_abs(mp_int *a, mp_int *b); |
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303 |
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304 /* compare a to b */ |
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305 int mp_cmp(mp_int *a, mp_int *b); |
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306 |
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307 /* compare |a| to |b| */ |
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308 int mp_cmp_mag(mp_int *a, mp_int *b); |
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309 |
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310 /* c = a + b */ |
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311 int mp_add(mp_int *a, mp_int *b, mp_int *c); |
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312 |
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313 /* c = a - b */ |
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314 int mp_sub(mp_int *a, mp_int *b, mp_int *c); |
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315 |
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316 /* c = a * b */ |
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317 int mp_mul(mp_int *a, mp_int *b, mp_int *c); |
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318 |
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319 /* b = a*a */ |
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320 int mp_sqr(mp_int *a, mp_int *b); |
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321 |
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322 /* a/b => cb + d == a */ |
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323 int mp_div(mp_int *a, mp_int *b, mp_int *c, mp_int *d); |
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324 |
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325 /* c = a mod b, 0 <= c < b */ |
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326 int mp_mod(mp_int *a, mp_int *b, mp_int *c); |
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327 |
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328 /* ---> single digit functions <--- */ |
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329 |
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330 /* compare against a single digit */ |
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331 int mp_cmp_d(mp_int *a, mp_digit b); |
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332 |
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333 /* c = a + b */ |
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334 int mp_add_d(mp_int *a, mp_digit b, mp_int *c); |
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335 |
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336 /* c = a - b */ |
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337 int mp_sub_d(mp_int *a, mp_digit b, mp_int *c); |
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338 |
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339 /* c = a * b */ |
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340 int mp_mul_d(mp_int *a, mp_digit b, mp_int *c); |
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341 |
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342 /* a/b => cb + d == a */ |
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343 int mp_div_d(mp_int *a, mp_digit b, mp_int *c, mp_digit *d); |
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344 |
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345 /* a/3 => 3c + d == a */ |
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346 int mp_div_3(mp_int *a, mp_int *c, mp_digit *d); |
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347 |
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348 /* c = a**b */ |
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349 int mp_expt_d(mp_int *a, mp_digit b, mp_int *c); |
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350 |
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351 /* c = a mod b, 0 <= c < b */ |
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352 int mp_mod_d(mp_int *a, mp_digit b, mp_digit *c); |
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353 |
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354 /* ---> number theory <--- */ |
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355 |
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356 /* d = a + b (mod c) */ |
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357 int mp_addmod(mp_int *a, mp_int *b, mp_int *c, mp_int *d); |
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358 |
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359 /* d = a - b (mod c) */ |
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360 int mp_submod(mp_int *a, mp_int *b, mp_int *c, mp_int *d); |
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361 |
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362 /* d = a * b (mod c) */ |
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363 int mp_mulmod(mp_int *a, mp_int *b, mp_int *c, mp_int *d); |
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364 |
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365 /* c = a * a (mod b) */ |
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366 int mp_sqrmod(mp_int *a, mp_int *b, mp_int *c); |
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367 |
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368 /* c = 1/a (mod b) */ |
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369 int mp_invmod(mp_int *a, mp_int *b, mp_int *c); |
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370 |
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371 /* c = (a, b) */ |
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372 int mp_gcd(mp_int *a, mp_int *b, mp_int *c); |
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373 |
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374 /* produces value such that U1*a + U2*b = U3 */ |
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375 int mp_exteuclid(mp_int *a, mp_int *b, mp_int *U1, mp_int *U2, mp_int *U3); |
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376 |
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377 /* c = [a, b] or (a*b)/(a, b) */ |
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378 int mp_lcm(mp_int *a, mp_int *b, mp_int *c); |
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379 |
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380 /* finds one of the b'th root of a, such that |c|**b <= |a| |
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381 * |
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382 * returns error if a < 0 and b is even |
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383 */ |
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384 int mp_n_root(mp_int *a, mp_digit b, mp_int *c); |
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385 |
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386 /* special sqrt algo */ |
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387 int mp_sqrt(mp_int *arg, mp_int *ret); |
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388 |
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389 /* is number a square? */ |
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390 int mp_is_square(mp_int *arg, int *ret); |
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391 |
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392 /* computes the jacobi c = (a | n) (or Legendre if b is prime) */ |
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393 int mp_jacobi(mp_int *a, mp_int *n, int *c); |
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394 |
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395 /* used to setup the Barrett reduction for a given modulus b */ |
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396 int mp_reduce_setup(mp_int *a, mp_int *b); |
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397 |
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398 /* Barrett Reduction, computes a (mod b) with a precomputed value c |
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399 * |
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400 * Assumes that 0 < a <= b*b, note if 0 > a > -(b*b) then you can merely |
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401 * compute the reduction as -1 * mp_reduce(mp_abs(a)) [pseudo code]. |
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402 */ |
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403 int mp_reduce(mp_int *a, mp_int *b, mp_int *c); |
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404 |
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405 /* setups the montgomery reduction */ |
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406 int mp_montgomery_setup(mp_int *a, mp_digit *mp); |
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407 |
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408 /* computes a = B**n mod b without division or multiplication useful for |
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409 * normalizing numbers in a Montgomery system. |
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410 */ |
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411 int mp_montgomery_calc_normalization(mp_int *a, mp_int *b); |
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412 |
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413 /* computes x/R == x (mod N) via Montgomery Reduction */ |
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414 int mp_montgomery_reduce(mp_int *a, mp_int *m, mp_digit mp); |
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415 |
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416 /* returns 1 if a is a valid DR modulus */ |
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417 int mp_dr_is_modulus(mp_int *a); |
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418 |
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419 /* sets the value of "d" required for mp_dr_reduce */ |
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420 void mp_dr_setup(mp_int *a, mp_digit *d); |
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421 |
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422 /* reduces a modulo b using the Diminished Radix method */ |
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423 int mp_dr_reduce(mp_int *a, mp_int *b, mp_digit mp); |
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424 |
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425 /* returns true if a can be reduced with mp_reduce_2k */ |
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426 int mp_reduce_is_2k(mp_int *a); |
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427 |
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428 /* determines k value for 2k reduction */ |
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429 int mp_reduce_2k_setup(mp_int *a, mp_digit *d); |
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430 |
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431 /* reduces a modulo b where b is of the form 2**p - k [0 <= a] */ |
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432 int mp_reduce_2k(mp_int *a, mp_int *n, mp_digit d); |
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433 |
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434 /* returns true if a can be reduced with mp_reduce_2k_l */ |
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435 int mp_reduce_is_2k_l(mp_int *a); |
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436 |
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437 /* determines k value for 2k reduction */ |
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438 int mp_reduce_2k_setup_l(mp_int *a, mp_int *d); |
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439 |
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440 /* reduces a modulo b where b is of the form 2**p - k [0 <= a] */ |
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441 int mp_reduce_2k_l(mp_int *a, mp_int *n, mp_int *d); |
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442 |
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443 /* d = a**b (mod c) */ |
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444 int mp_exptmod(mp_int *a, mp_int *b, mp_int *c, mp_int *d); |
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445 |
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446 /* ---> Primes <--- */ |
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447 |
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448 /* number of primes */ |
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449 #ifdef MP_8BIT |
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450 #define PRIME_SIZE 31 |
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451 #else |
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452 #define PRIME_SIZE 256 |
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453 #endif |
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454 |
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455 /* table of first PRIME_SIZE primes */ |
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456 extern const mp_digit ltm_prime_tab[]; |
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457 |
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458 /* result=1 if a is divisible by one of the first PRIME_SIZE primes */ |
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459 int mp_prime_is_divisible(mp_int *a, int *result); |
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460 |
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461 /* performs one Fermat test of "a" using base "b". |
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462 * Sets result to 0 if composite or 1 if probable prime |
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463 */ |
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464 int mp_prime_fermat(mp_int *a, mp_int *b, int *result); |
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465 |
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466 /* performs one Miller-Rabin test of "a" using base "b". |
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467 * Sets result to 0 if composite or 1 if probable prime |
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468 */ |
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469 int mp_prime_miller_rabin(mp_int *a, mp_int *b, int *result); |
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470 |
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471 /* This gives [for a given bit size] the number of trials required |
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472 * such that Miller-Rabin gives a prob of failure lower than 2^-96 |
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473 */ |
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474 int mp_prime_rabin_miller_trials(int size); |
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475 |
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476 /* performs t rounds of Miller-Rabin on "a" using the first |
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477 * t prime bases. Also performs an initial sieve of trial |
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478 * division. Determines if "a" is prime with probability |
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479 * of error no more than (1/4)**t. |
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480 * |
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481 * Sets result to 1 if probably prime, 0 otherwise |
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482 */ |
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483 int mp_prime_is_prime(mp_int *a, int t, int *result); |
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484 |
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485 /* finds the next prime after the number "a" using "t" trials |
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486 * of Miller-Rabin. |
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487 * |
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488 * bbs_style = 1 means the prime must be congruent to 3 mod 4 |
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489 */ |
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490 int mp_prime_next_prime(mp_int *a, int t, int bbs_style); |
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491 |
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492 /* makes a truly random prime of a given size (bytes), |
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493 * call with bbs = 1 if you want it to be congruent to 3 mod 4 |
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494 * |
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495 * You have to supply a callback which fills in a buffer with random bytes. "dat" is a parameter you can |
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496 * have passed to the callback (e.g. a state or something). This function doesn't use "dat" itself |
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497 * so it can be NULL |
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498 * |
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499 * The prime generated will be larger than 2^(8*size). |
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500 */ |
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501 #define mp_prime_random(a, t, size, bbs, cb, dat) mp_prime_random_ex(a, t, ((size) * 8) + 1, (bbs==1)?LTM_PRIME_BBS:0, cb, dat) |
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502 |
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503 /* makes a truly random prime of a given size (bits), |
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504 * |
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505 * Flags are as follows: |
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506 * |
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507 * LTM_PRIME_BBS - make prime congruent to 3 mod 4 |
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508 * LTM_PRIME_SAFE - make sure (p-1)/2 is prime as well (implies LTM_PRIME_BBS) |
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509 * LTM_PRIME_2MSB_OFF - make the 2nd highest bit zero |
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510 * LTM_PRIME_2MSB_ON - make the 2nd highest bit one |
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511 * |
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512 * You have to supply a callback which fills in a buffer with random bytes. "dat" is a parameter you can |
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513 * have passed to the callback (e.g. a state or something). This function doesn't use "dat" itself |
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514 * so it can be NULL |
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515 * |
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516 */ |
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517 int mp_prime_random_ex(mp_int *a, int t, int size, int flags, ltm_prime_callback cb, void *dat); |
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518 |
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519 /* ---> radix conversion <--- */ |
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520 int mp_count_bits(mp_int *a); |
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521 |
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522 int mp_unsigned_bin_size(mp_int *a); |
389
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523 int mp_read_unsigned_bin(mp_int *a, const unsigned char *b, int c); |
284
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524 int mp_to_unsigned_bin(mp_int *a, unsigned char *b); |
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525 int mp_to_unsigned_bin_n (mp_int * a, unsigned char *b, unsigned long *outlen); |
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526 |
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527 int mp_signed_bin_size(mp_int *a); |
389
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528 int mp_read_signed_bin(mp_int *a, const unsigned char *b, int c); |
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529 int mp_to_signed_bin(mp_int *a, unsigned char *b); |
284
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530 int mp_to_signed_bin_n (mp_int * a, unsigned char *b, unsigned long *outlen); |
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531 |
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532 int mp_read_radix(mp_int *a, const char *str, int radix); |
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533 int mp_toradix(mp_int *a, char *str, int radix); |
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534 int mp_toradix_n(mp_int * a, char *str, int radix, int maxlen); |
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535 int mp_radix_size(mp_int *a, int radix, int *size); |
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536 |
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537 int mp_fread(mp_int *a, int radix, FILE *stream); |
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538 int mp_fwrite(mp_int *a, int radix, FILE *stream); |
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539 |
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540 #define mp_read_raw(mp, str, len) mp_read_signed_bin((mp), (str), (len)) |
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541 #define mp_raw_size(mp) mp_signed_bin_size(mp) |
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542 #define mp_toraw(mp, str) mp_to_signed_bin((mp), (str)) |
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543 #define mp_read_mag(mp, str, len) mp_read_unsigned_bin((mp), (str), (len)) |
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544 #define mp_mag_size(mp) mp_unsigned_bin_size(mp) |
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545 #define mp_tomag(mp, str) mp_to_unsigned_bin((mp), (str)) |
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546 |
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547 #define mp_tobinary(M, S) mp_toradix((M), (S), 2) |
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548 #define mp_tooctal(M, S) mp_toradix((M), (S), 8) |
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549 #define mp_todecimal(M, S) mp_toradix((M), (S), 10) |
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550 #define mp_tohex(M, S) mp_toradix((M), (S), 16) |
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551 |
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552 /* lowlevel functions, do not call! */ |
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553 int s_mp_add(mp_int *a, mp_int *b, mp_int *c); |
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554 int s_mp_sub(mp_int *a, mp_int *b, mp_int *c); |
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555 #define s_mp_mul(a, b, c) s_mp_mul_digs(a, b, c, (a)->used + (b)->used + 1) |
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556 int fast_s_mp_mul_digs(mp_int *a, mp_int *b, mp_int *c, int digs); |
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557 int s_mp_mul_digs(mp_int *a, mp_int *b, mp_int *c, int digs); |
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558 int fast_s_mp_mul_high_digs(mp_int *a, mp_int *b, mp_int *c, int digs); |
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559 int s_mp_mul_high_digs(mp_int *a, mp_int *b, mp_int *c, int digs); |
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560 int fast_s_mp_sqr(mp_int *a, mp_int *b); |
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561 int s_mp_sqr(mp_int *a, mp_int *b); |
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562 int mp_karatsuba_mul(mp_int *a, mp_int *b, mp_int *c); |
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563 int mp_toom_mul(mp_int *a, mp_int *b, mp_int *c); |
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564 int mp_karatsuba_sqr(mp_int *a, mp_int *b); |
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565 int mp_toom_sqr(mp_int *a, mp_int *b); |
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566 int fast_mp_invmod(mp_int *a, mp_int *b, mp_int *c); |
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567 int mp_invmod_slow (mp_int * a, mp_int * b, mp_int * c); |
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568 int fast_mp_montgomery_reduce(mp_int *a, mp_int *m, mp_digit mp); |
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569 int mp_exptmod_fast(mp_int *G, mp_int *X, mp_int *P, mp_int *Y, int mode); |
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570 int s_mp_exptmod (mp_int * G, mp_int * X, mp_int * P, mp_int * Y, int mode); |
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571 void bn_reverse(unsigned char *s, int len); |
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572 |
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573 extern const char *mp_s_rmap; |
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574 |
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575 #ifdef __cplusplus |
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576 } |
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577 #endif |
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578 |
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579 #endif |
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580 |
389
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581 |
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582 /* $Source: /cvs/libtom/libtommath/tommath.h,v $ */ |
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583 /* $Revision: 1.8 $ */ |
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584 /* $Date: 2006/03/31 14:18:44 $ */ |