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annotate libtommath/bn_mp_tc_or.c @ 1665:7c17995bcdfb

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Improve address logging on early exit messages (#83) Change 'Early exit' and 'Exit before auth' messages to include the IP address & port as part of the message. This allows log scanning utilities such as 'fail2ban' to obtain the offending IP address as part of the failure event instead of extracting the PID from the message and then scanning the log again for match 'child connection from' messages Signed-off-by: Kevin Darbyshire-Bryant <[email protected]>
author Kevin Darbyshire-Bryant <6500011+ldir-EDB0@users.noreply.github.com>
date Wed, 18 Mar 2020 15:28:56 +0000
parents f52919ffd3b1
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1655
f52919ffd3b1 update ltm to 1.1.0 and enable FIPS 186.4 compliant key-generation (#79)
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1 #include "tommath_private.h"
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2 #ifdef BN_MP_TC_OR_C
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3 /* LibTomMath, multiple-precision integer library -- Tom St Denis
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4 *
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5 * LibTomMath is a library that provides multiple-precision
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6 * integer arithmetic as well as number theoretic functionality.
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7 *
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8 * The library was designed directly after the MPI library by
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9 * Michael Fromberger but has been written from scratch with
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10 * additional optimizations in place.
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11 *
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12 * SPDX-License-Identifier: Unlicense
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13 */
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14
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15 /* two complement or */
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16 int mp_tc_or(const mp_int *a, const mp_int *b, mp_int *c)
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17 {
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18 int res = MP_OKAY, bits, abits, bbits;
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19 int as = mp_isneg(a), bs = mp_isneg(b);
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20 mp_int *mx = NULL, _mx, acpy, bcpy;
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21
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22 if ((as != MP_NO) || (bs != MP_NO)) {
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23 abits = mp_count_bits(a);
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24 bbits = mp_count_bits(b);
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25 bits = MAX(abits, bbits);
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26 res = mp_init_set_int(&_mx, 1uL);
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27 if (res != MP_OKAY) {
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28 goto end;
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29 }
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30
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31 mx = &_mx;
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32 res = mp_mul_2d(mx, bits + 1, mx);
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33 if (res != MP_OKAY) {
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34 goto end;
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35 }
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36
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37 if (as != MP_NO) {
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38 res = mp_init(&acpy);
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39 if (res != MP_OKAY) {
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40 goto end;
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41 }
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42
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43 res = mp_add(mx, a, &acpy);
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44 if (res != MP_OKAY) {
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45 mp_clear(&acpy);
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46 goto end;
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47 }
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48 a = &acpy;
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49 }
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50 if (bs != MP_NO) {
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51 res = mp_init(&bcpy);
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52 if (res != MP_OKAY) {
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53 goto end;
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54 }
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55
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56 res = mp_add(mx, b, &bcpy);
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57 if (res != MP_OKAY) {
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58 mp_clear(&bcpy);
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59 goto end;
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60 }
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61 b = &bcpy;
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62 }
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63 }
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64
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65 res = mp_or(a, b, c);
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66
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67 if (((as != MP_NO) || (bs != MP_NO)) && (res == MP_OKAY)) {
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68 res = mp_sub(c, mx, c);
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69 }
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70
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71 end:
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72 if (a == &acpy) {
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73 mp_clear(&acpy);
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74 }
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75
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76 if (b == &bcpy) {
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77 mp_clear(&bcpy);
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78 }
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79
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80 if (mx == &_mx) {
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81 mp_clear(mx);
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82 }
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83
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84 return res;
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85 }
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86 #endif
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87
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88 /* ref: HEAD -> master, tag: v1.1.0 */
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89 /* git commit: 08549ad6bc8b0cede0b357a9c341c5c6473a9c55 */
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90 /* commit time: 2019-01-28 20:32:32 +0100 */