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annotate nss/lib/freebl/mpi/mpi-priv.h @ 4:b513267f632f tip

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Build DBM module
author Andre Heinecke <andre.heinecke@intevation.de>
date Tue, 05 Aug 2014 18:58:03 +0200
parents 1e5118fa0cb1
children
rev   line source
0
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1 /*
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2 * mpi-priv.h - Private header file for MPI
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3 * Arbitrary precision integer arithmetic library
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4 *
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5 * NOTE WELL: the content of this header file is NOT part of the "public"
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6 * API for the MPI library, and may change at any time.
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7 * Application programs that use libmpi should NOT include this header file.
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8 *
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9 * This Source Code Form is subject to the terms of the Mozilla Public
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10 * License, v. 2.0. If a copy of the MPL was not distributed with this
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11 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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12 #ifndef _MPI_PRIV_H_
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13 #define _MPI_PRIV_H_ 1
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14
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15 #include "mpi.h"
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16 #include <stdlib.h>
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17 #include <string.h>
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18 #include <ctype.h>
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19
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20 #if MP_DEBUG
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21 #include <stdio.h>
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22
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23 #define DIAG(T,V) {fprintf(stderr,T);mp_print(V,stderr);fputc('\n',stderr);}
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24 #else
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25 #define DIAG(T,V)
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26 #endif
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27
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28 /* If we aren't using a wired-in logarithm table, we need to include
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29 the math library to get the log() function
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30 */
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31
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32 /* {{{ s_logv_2[] - log table for 2 in various bases */
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33
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34 #if MP_LOGTAB
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35 /*
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36 A table of the logs of 2 for various bases (the 0 and 1 entries of
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37 this table are meaningless and should not be referenced).
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38
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39 This table is used to compute output lengths for the mp_toradix()
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40 function. Since a number n in radix r takes up about log_r(n)
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41 digits, we estimate the output size by taking the least integer
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42 greater than log_r(n), where:
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43
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44 log_r(n) = log_2(n) * log_r(2)
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45
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46 This table, therefore, is a table of log_r(2) for 2 <= r <= 36,
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47 which are the output bases supported.
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48 */
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49
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50 extern const float s_logv_2[];
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51 #define LOG_V_2(R) s_logv_2[(R)]
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52
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53 #else
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54
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55 /*
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56 If MP_LOGTAB is not defined, use the math library to compute the
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57 logarithms on the fly. Otherwise, use the table.
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58 Pick which works best for your system.
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59 */
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60
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61 #include <math.h>
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62 #define LOG_V_2(R) (log(2.0)/log(R))
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63
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64 #endif /* if MP_LOGTAB */
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65
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66 /* }}} */
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67
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68 /* {{{ Digit arithmetic macros */
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69
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70 /*
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71 When adding and multiplying digits, the results can be larger than
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72 can be contained in an mp_digit. Thus, an mp_word is used. These
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73 macros mask off the upper and lower digits of the mp_word (the
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74 mp_word may be more than 2 mp_digits wide, but we only concern
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75 ourselves with the low-order 2 mp_digits)
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76 */
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77
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78 #define CARRYOUT(W) (mp_digit)((W)>>DIGIT_BIT)
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79 #define ACCUM(W) (mp_digit)(W)
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80
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81 #define MP_MIN(a,b) (((a) < (b)) ? (a) : (b))
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82 #define MP_MAX(a,b) (((a) > (b)) ? (a) : (b))
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83 #define MP_HOWMANY(a,b) (((a) + (b) - 1)/(b))
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84 #define MP_ROUNDUP(a,b) (MP_HOWMANY(a,b) * (b))
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85
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86 /* }}} */
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87
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88 /* {{{ Comparison constants */
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89
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90 #define MP_LT -1
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91 #define MP_EQ 0
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92 #define MP_GT 1
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93
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94 /* }}} */
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95
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96 /* {{{ private function declarations */
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97
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98 /*
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99 If MP_MACRO is false, these will be defined as actual functions;
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100 otherwise, suitable macro definitions will be used. This works
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101 around the fact that ANSI C89 doesn't support an 'inline' keyword
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102 (although I hear C9x will ... about bloody time). At present, the
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103 macro definitions are identical to the function bodies, but they'll
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104 expand in place, instead of generating a function call.
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105
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106 I chose these particular functions to be made into macros because
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107 some profiling showed they are called a lot on a typical workload,
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108 and yet they are primarily housekeeping.
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109 */
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110 #if MP_MACRO == 0
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111 void s_mp_setz(mp_digit *dp, mp_size count); /* zero digits */
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112 void s_mp_copy(const mp_digit *sp, mp_digit *dp, mp_size count); /* copy */
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113 void *s_mp_alloc(size_t nb, size_t ni); /* general allocator */
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114 void s_mp_free(void *ptr); /* general free function */
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115 extern unsigned long mp_allocs;
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116 extern unsigned long mp_frees;
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117 extern unsigned long mp_copies;
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118 #else
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119
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120 /* Even if these are defined as macros, we need to respect the settings
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121 of the MP_MEMSET and MP_MEMCPY configuration options...
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122 */
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123 #if MP_MEMSET == 0
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124 #define s_mp_setz(dp, count) \
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125 {int ix;for(ix=0;ix<(count);ix++)(dp)[ix]=0;}
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126 #else
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127 #define s_mp_setz(dp, count) memset(dp, 0, (count) * sizeof(mp_digit))
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128 #endif /* MP_MEMSET */
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129
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130 #if MP_MEMCPY == 0
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131 #define s_mp_copy(sp, dp, count) \
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132 {int ix;for(ix=0;ix<(count);ix++)(dp)[ix]=(sp)[ix];}
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133 #else
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134 #define s_mp_copy(sp, dp, count) memcpy(dp, sp, (count) * sizeof(mp_digit))
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135 #endif /* MP_MEMCPY */
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136
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137 #define s_mp_alloc(nb, ni) calloc(nb, ni)
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138 #define s_mp_free(ptr) {if(ptr) free(ptr);}
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139 #endif /* MP_MACRO */
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140
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141 mp_err s_mp_grow(mp_int *mp, mp_size min); /* increase allocated size */
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142 mp_err s_mp_pad(mp_int *mp, mp_size min); /* left pad with zeroes */
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143
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144 #if MP_MACRO == 0
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145 void s_mp_clamp(mp_int *mp); /* clip leading zeroes */
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146 #else
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147 #define s_mp_clamp(mp)\
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148 { mp_size used = MP_USED(mp); \
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149 while (used > 1 && DIGIT(mp, used - 1) == 0) --used; \
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150 MP_USED(mp) = used; \
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151 }
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152 #endif /* MP_MACRO */
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153
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154 void s_mp_exch(mp_int *a, mp_int *b); /* swap a and b in place */
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155
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156 mp_err s_mp_lshd(mp_int *mp, mp_size p); /* left-shift by p digits */
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157 void s_mp_rshd(mp_int *mp, mp_size p); /* right-shift by p digits */
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158 mp_err s_mp_mul_2d(mp_int *mp, mp_digit d); /* multiply by 2^d in place */
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159 void s_mp_div_2d(mp_int *mp, mp_digit d); /* divide by 2^d in place */
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160 void s_mp_mod_2d(mp_int *mp, mp_digit d); /* modulo 2^d in place */
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161 void s_mp_div_2(mp_int *mp); /* divide by 2 in place */
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162 mp_err s_mp_mul_2(mp_int *mp); /* multiply by 2 in place */
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163 mp_err s_mp_norm(mp_int *a, mp_int *b, mp_digit *pd);
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164 /* normalize for division */
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165 mp_err s_mp_add_d(mp_int *mp, mp_digit d); /* unsigned digit addition */
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166 mp_err s_mp_sub_d(mp_int *mp, mp_digit d); /* unsigned digit subtract */
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167 mp_err s_mp_mul_d(mp_int *mp, mp_digit d); /* unsigned digit multiply */
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168 mp_err s_mp_div_d(mp_int *mp, mp_digit d, mp_digit *r);
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169 /* unsigned digit divide */
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170 mp_err s_mp_reduce(mp_int *x, const mp_int *m, const mp_int *mu);
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171 /* Barrett reduction */
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172 mp_err s_mp_add(mp_int *a, const mp_int *b); /* magnitude addition */
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173 mp_err s_mp_add_3arg(const mp_int *a, const mp_int *b, mp_int *c);
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174 mp_err s_mp_sub(mp_int *a, const mp_int *b); /* magnitude subtract */
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175 mp_err s_mp_sub_3arg(const mp_int *a, const mp_int *b, mp_int *c);
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176 mp_err s_mp_add_offset(mp_int *a, mp_int *b, mp_size offset);
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177 /* a += b * RADIX^offset */
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178 mp_err s_mp_mul(mp_int *a, const mp_int *b); /* magnitude multiply */
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179 #if MP_SQUARE
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180 mp_err s_mp_sqr(mp_int *a); /* magnitude square */
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181 #else
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182 #define s_mp_sqr(a) s_mp_mul(a, a)
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183 #endif
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184 mp_err s_mp_div(mp_int *rem, mp_int *div, mp_int *quot); /* magnitude div */
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185 mp_err s_mp_exptmod(const mp_int *a, const mp_int *b, const mp_int *m, mp_int *c);
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186 mp_err s_mp_2expt(mp_int *a, mp_digit k); /* a = 2^k */
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187 int s_mp_cmp(const mp_int *a, const mp_int *b); /* magnitude comparison */
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188 int s_mp_cmp_d(const mp_int *a, mp_digit d); /* magnitude digit compare */
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189 int s_mp_ispow2(const mp_int *v); /* is v a power of 2? */
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190 int s_mp_ispow2d(mp_digit d); /* is d a power of 2? */
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191
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192 int s_mp_tovalue(char ch, int r); /* convert ch to value */
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193 char s_mp_todigit(mp_digit val, int r, int low); /* convert val to digit */
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194 int s_mp_outlen(int bits, int r); /* output length in bytes */
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195 mp_digit s_mp_invmod_radix(mp_digit P); /* returns (P ** -1) mod RADIX */
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196 mp_err s_mp_invmod_odd_m( const mp_int *a, const mp_int *m, mp_int *c);
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197 mp_err s_mp_invmod_2d( const mp_int *a, mp_size k, mp_int *c);
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198 mp_err s_mp_invmod_even_m(const mp_int *a, const mp_int *m, mp_int *c);
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199
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200 #ifdef NSS_USE_COMBA
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201
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202 #define IS_POWER_OF_2(a) ((a) && !((a) & ((a)-1)))
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203
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204 void s_mp_mul_comba_4(const mp_int *A, const mp_int *B, mp_int *C);
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205 void s_mp_mul_comba_8(const mp_int *A, const mp_int *B, mp_int *C);
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206 void s_mp_mul_comba_16(const mp_int *A, const mp_int *B, mp_int *C);
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207 void s_mp_mul_comba_32(const mp_int *A, const mp_int *B, mp_int *C);
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208
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209 void s_mp_sqr_comba_4(const mp_int *A, mp_int *B);
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210 void s_mp_sqr_comba_8(const mp_int *A, mp_int *B);
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211 void s_mp_sqr_comba_16(const mp_int *A, mp_int *B);
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212 void s_mp_sqr_comba_32(const mp_int *A, mp_int *B);
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213
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214 #endif /* end NSS_USE_COMBA */
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215
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216 /* ------ mpv functions, operate on arrays of digits, not on mp_int's ------ */
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217 #if defined (__OS2__) && defined (__IBMC__)
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218 #define MPI_ASM_DECL __cdecl
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219 #else
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220 #define MPI_ASM_DECL
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221 #endif
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222
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223 #ifdef MPI_AMD64
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224
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225 mp_digit MPI_ASM_DECL s_mpv_mul_set_vec64(mp_digit*, mp_digit *, mp_size, mp_digit);
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226 mp_digit MPI_ASM_DECL s_mpv_mul_add_vec64(mp_digit*, const mp_digit*, mp_size, mp_digit);
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227
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228 /* c = a * b */
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229 #define s_mpv_mul_d(a, a_len, b, c) \
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230 ((mp_digit *)c)[a_len] = s_mpv_mul_set_vec64(c, a, a_len, b)
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231
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232 /* c += a * b */
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233 #define s_mpv_mul_d_add(a, a_len, b, c) \
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234 ((mp_digit *)c)[a_len] = s_mpv_mul_add_vec64(c, a, a_len, b)
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235
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236
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237 #else
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238
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239 void MPI_ASM_DECL s_mpv_mul_d(const mp_digit *a, mp_size a_len,
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240 mp_digit b, mp_digit *c);
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241 void MPI_ASM_DECL s_mpv_mul_d_add(const mp_digit *a, mp_size a_len,
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242 mp_digit b, mp_digit *c);
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243
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244 #endif
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245
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246 void MPI_ASM_DECL s_mpv_mul_d_add_prop(const mp_digit *a,
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247 mp_size a_len, mp_digit b,
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248 mp_digit *c);
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249 void MPI_ASM_DECL s_mpv_sqr_add_prop(const mp_digit *a,
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250 mp_size a_len,
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251 mp_digit *sqrs);
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252
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253 mp_err MPI_ASM_DECL s_mpv_div_2dx1d(mp_digit Nhi, mp_digit Nlo,
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254 mp_digit divisor, mp_digit *quot, mp_digit *rem);
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255
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256 /* c += a * b * (MP_RADIX ** offset); */
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257 #define s_mp_mul_d_add_offset(a, b, c, off) \
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258 (s_mpv_mul_d_add_prop(MP_DIGITS(a), MP_USED(a), b, MP_DIGITS(c) + off), MP_OKAY)
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259
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260 typedef struct {
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261 mp_int N; /* modulus N */
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262 mp_digit n0prime; /* n0' = - (n0 ** -1) mod MP_RADIX */
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263 } mp_mont_modulus;
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264
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265 mp_err s_mp_mul_mont(const mp_int *a, const mp_int *b, mp_int *c,
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266 mp_mont_modulus *mmm);
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267 mp_err s_mp_redc(mp_int *T, mp_mont_modulus *mmm);
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268
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269 /*
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270 * s_mpi_getProcessorLineSize() returns the size in bytes of the cache line
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271 * if a cache exists, or zero if there is no cache. If more than one
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272 * cache line exists, it should return the smallest line size (which is
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273 * usually the L1 cache).
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274 *
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275 * mp_modexp uses this information to make sure that private key information
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276 * isn't being leaked through the cache.
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277 *
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278 * see mpcpucache.c for the implementation.
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279 */
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280 unsigned long s_mpi_getProcessorLineSize();
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281
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282 /* }}} */
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283 #endif
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284
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