Mercurial > dropbear
annotate libtommath/bn_mp_reduce_is_2k_l.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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update ltm to 1.1.0 and enable FIPS 186.4 compliant key-generation (#79)
Steffen Jaeckel <s_jaeckel@gmx.de>
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1 #include "tommath_private.h" |
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2 #ifdef BN_MP_REDUCE_IS_2K_L_C |
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3 /* LibTomMath, multiple-precision integer library -- Tom St Denis */ |
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4 /* SPDX-License-Identifier: Unlicense */ |
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5 |
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6 /* determines if reduce_2k_l can be used */ |
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7 mp_bool mp_reduce_is_2k_l(const mp_int *a) |
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8 { |
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9 int ix, iy; |
1655
f52919ffd3b1
update ltm to 1.1.0 and enable FIPS 186.4 compliant key-generation (#79)
Steffen Jaeckel <s_jaeckel@gmx.de>
parents:
1470
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10 |
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11 if (a->used == 0) { |
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12 return MP_NO; |
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13 } else if (a->used == 1) { |
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14 return MP_YES; |
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15 } else if (a->used > 1) { |
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16 /* if more than half of the digits are -1 we're sold */ |
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17 for (iy = ix = 0; ix < a->used; ix++) { |
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18 if (a->dp[ix] == MP_DIGIT_MAX) { |
1655
f52919ffd3b1
update ltm to 1.1.0 and enable FIPS 186.4 compliant key-generation (#79)
Steffen Jaeckel <s_jaeckel@gmx.de>
parents:
1470
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19 ++iy; |
f52919ffd3b1
update ltm to 1.1.0 and enable FIPS 186.4 compliant key-generation (#79)
Steffen Jaeckel <s_jaeckel@gmx.de>
parents:
1470
diff
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20 } |
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21 } |
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22 return (iy >= (a->used/2)) ? MP_YES : MP_NO; |
1692
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Steffen Jaeckel <s@jaeckel.eu>
parents:
1655
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23 } else { |
1051e4eea25a
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parents:
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24 return MP_NO; |
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25 } |
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26 } |
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27 |
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28 #endif |