Mercurial > dropbear
annotate libtommath/bn_mp_incr.c @ 1861:2b3a8026a6ce
Add re-exec for server
This allows ASLR to re-randomize the address
space for every connection, preventing some
vulnerabilities from being exploitable by
repeated probing.
Overhead (memory and time) is yet to be confirmed.
At present this is only enabled on Linux. Other BSD platforms
with fexecve() would probably also work though have not been tested.
author | Matt Johnston <matt@ucc.asn.au> |
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date | Sun, 30 Jan 2022 10:14:56 +0800 |
parents | 1051e4eea25a |
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rev | line source |
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1692
1051e4eea25a
Update LibTomMath to 1.2.0 (#84)
Steffen Jaeckel <s@jaeckel.eu>
parents:
diff
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1 #include "tommath_private.h" |
1051e4eea25a
Update LibTomMath to 1.2.0 (#84)
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2 #ifdef BN_MP_INCR_C |
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3 /* LibTomMath, multiple-precision integer library -- Tom St Denis */ |
1051e4eea25a
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4 /* SPDX-License-Identifier: Unlicense */ |
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5 |
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6 /* Increment "a" by one like "a++". Changes input! */ |
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Update LibTomMath to 1.2.0 (#84)
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parents:
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7 mp_err mp_incr(mp_int *a) |
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8 { |
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9 if (MP_IS_ZERO(a)) { |
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10 mp_set(a,1uL); |
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11 return MP_OKAY; |
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12 } else if (a->sign == MP_NEG) { |
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13 mp_err err; |
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14 a->sign = MP_ZPOS; |
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15 if ((err = mp_decr(a)) != MP_OKAY) { |
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16 return err; |
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17 } |
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18 /* There is no -0 in LTM */ |
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19 if (!MP_IS_ZERO(a)) { |
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20 a->sign = MP_NEG; |
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21 } |
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22 return MP_OKAY; |
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23 } else if (a->dp[0] < MP_DIGIT_MAX) { |
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24 a->dp[0]++; |
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25 return MP_OKAY; |
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26 } else { |
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27 return mp_add_d(a, 1uL,a); |
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28 } |
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29 } |
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30 #endif |