1 | /* mpi_superclass.h
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2 | *
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3 | * Copyright (C) 2006-2017 wolfSSL Inc.
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4 | *
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5 | * This file is part of wolfSSL.
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6 | *
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7 | * wolfSSL is free software; you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation; either version 2 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * wolfSSL is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with this program; if not, write to the Free Software
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19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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20 | */
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21 |
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22 |
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23 |
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24 | /* super class file for PK algos */
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25 |
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26 | /* default ... include all MPI */
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27 | #define LTM_ALL
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28 |
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29 | /* RSA only (does not support DH/DSA/ECC) */
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30 | /* #define SC_RSA_1 */
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31 |
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32 | /* For reference.... On an Athlon64 optimizing for speed...
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33 |
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34 | LTM's mpi.o with all functions [striped] is 142KiB in size.
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35 |
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36 | */
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37 |
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38 | /* Works for RSA only, mpi.o is 68KiB */
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39 | #ifdef SC_RSA_1
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40 | #define BN_MP_SHRINK_C
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41 | #define BN_MP_LCM_C
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42 | #define BN_MP_PRIME_RANDOM_EX_C
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43 | #define BN_MP_INVMOD_C
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44 | #define BN_MP_GCD_C
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45 | #define BN_MP_MOD_C
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46 | #define BN_MP_MULMOD_C
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47 | #define BN_MP_ADDMOD_C
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48 | #define BN_MP_EXPTMOD_C
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49 | #define BN_MP_SET_INT_C
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50 | #define BN_MP_INIT_MULTI_C
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51 | #define BN_MP_CLEAR_MULTI_C
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52 | #define BN_MP_UNSIGNED_BIN_SIZE_C
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53 | #define BN_MP_TO_UNSIGNED_BIN_C
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54 | #define BN_MP_MOD_D_C
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55 | #define BN_MP_PRIME_RABIN_MILLER_TRIALS_C
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56 | #define BN_REVERSE_C
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57 | #define BN_PRIME_TAB_C
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58 |
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59 | /* other modifiers */
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60 | #define BN_MP_DIV_SMALL /* Slower division, not critical */
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61 |
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62 | /* here we are on the last pass so we turn things off. The functions classes are still there
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63 | * but we remove them specifically from the build. This also invokes tweaks in functions
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64 | * like removing support for even moduli, etc...
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65 | */
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66 | #ifdef LTM_LAST
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67 | #undef BN_MP_TOOM_MUL_C
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68 | #undef BN_MP_TOOM_SQR_C
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69 | #undef BN_MP_KARATSUBA_MUL_C
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70 | #undef BN_MP_KARATSUBA_SQR_C
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71 | #undef BN_MP_REDUCE_C
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72 | #undef BN_MP_REDUCE_SETUP_C
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73 | #undef BN_MP_DR_IS_MODULUS_C
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74 | #undef BN_MP_DR_SETUP_C
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75 | #undef BN_MP_DR_REDUCE_C
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76 | #undef BN_MP_REDUCE_IS_2K_C
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77 | #undef BN_MP_REDUCE_2K_SETUP_C
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78 | #undef BN_MP_REDUCE_2K_C
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79 | #undef BN_S_MP_EXPTMOD_C
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80 | #undef BN_MP_DIV_3_C
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81 | #undef BN_S_MP_MUL_HIGH_DIGS_C
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82 | #undef BN_FAST_S_MP_MUL_HIGH_DIGS_C
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83 | #undef BN_FAST_MP_INVMOD_C
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84 |
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85 | /* To safely undefine these you have to make sure your RSA key won't exceed the Comba threshold
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86 | * which is roughly 255 digits [7140 bits for 32-bit machines, 15300 bits for 64-bit machines]
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87 | * which means roughly speaking you can handle up to 2536-bit RSA keys with these defined without
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88 | * trouble.
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89 | */
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90 | #undef BN_S_MP_MUL_DIGS_C
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91 | #undef BN_S_MP_SQR_C
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92 | #undef BN_MP_MONTGOMERY_REDUCE_C
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93 | #endif
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94 |
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95 | #endif
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96 |
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