Mercurial > dropbear
annotate libtommath/bn_mp_reduce_is_2k_l.c @ 340:454a34b2dfd1
Fixes from Erik Hovland:
cli-authpubkey.c:
fix leak of keybuf
cli-kex.c:
fix leak of fingerprint fp
cli-service.c:
remove commented out code
dropbearkey.c:
don't attepmt to free NULL key on failure
common-kex.c:
only free key if it is initialised
keyimport.c:
remove dead encrypted-key code
don't leak a FILE* loading OpenSSH keys
rsa.c, dss.c:
check return values for some libtommath functions
svr-kex.c:
check return value retrieving DH kex mpint
svr-tcpfwd.c:
fix null-dereference if remote tcp forward request fails
tcp-accept.c:
don't incorrectly free the tcpinfo var
author | Matt Johnston <matt@ucc.asn.au> |
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date | Fri, 07 Jul 2006 09:17:18 +0000 |
parents | eed26cff980b |
children | 5ff8218bcee9 |
rev | line source |
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284
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1 #include <tommath.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 * |
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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 * The library is free for all purposes without any express |
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13 * guarantee it works. |
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14 * |
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15 * Tom St Denis, [email protected], http://math.libtomcrypt.org |
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16 */ |
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17 |
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18 /* determines if reduce_2k_l can be used */ |
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19 int mp_reduce_is_2k_l(mp_int *a) |
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20 { |
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21 int ix, iy; |
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22 |
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23 if (a->used == 0) { |
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24 return MP_NO; |
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25 } else if (a->used == 1) { |
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26 return MP_YES; |
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27 } else if (a->used > 1) { |
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28 /* if more than half of the digits are -1 we're sold */ |
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29 for (iy = ix = 0; ix < a->used; ix++) { |
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30 if (a->dp[ix] == MP_MASK) { |
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31 ++iy; |
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32 } |
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33 } |
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34 return (iy >= (a->used/2)) ? MP_YES : MP_NO; |
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35 |
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36 } |
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37 return MP_NO; |
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38 } |
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39 |
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40 #endif |