Mercurial > dropbear

annotate libtommath/bn_mp_init.c @ 1715:3974f087d9c0

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Disallow leading lines before the ident for server (#102) Per RFC4253 4.2 clients must be able to process other lines of data before the version string, server behavior is not defined neither with MUST/SHOULD nor with MAY. If server process up to 50 lines too - it may cause too long hanging session with invalid/evil client that consume host resources and potentially may lead to DDoS on poor embedded boxes. Let's require first line from client to be version string and fail early if it's not - matches both RFC and real OpenSSH behavior.
author Vladislav Grishenko <themiron@users.noreply.github.com>
date Mon, 15 Jun 2020 18:22:18 +0500
parents 1051e4eea25a
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 changeset
1 #include "tommath_private.h"
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2 #ifdef BN_MP_INIT_C
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1051e4eea25a Update LibTomMath to 1.2.0 (#84)
Steffen Jaeckel <s@jaeckel.eu>
parents: 1655
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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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6 /* init a new mp_int */
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parents: 1655
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7 mp_err mp_init(mp_int *a)
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8 {
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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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9 /* allocate memory required and clear it */
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parents: 1655
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10 a->dp = (mp_digit *) MP_CALLOC((size_t)MP_PREC, sizeof(mp_digit));
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Steffen Jaeckel <s_jaeckel@gmx.de>
parents: 1470
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11 if (a->dp == NULL) {
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parents: 1470
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12 return MP_MEM;
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Steffen Jaeckel <s_jaeckel@gmx.de>
parents: 1470
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13 }
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14
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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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15 /* set the used to zero, allocated digits to the default precision
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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16 * and sign to positive */
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parents: 1470
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17 a->used = 0;
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Steffen Jaeckel <s_jaeckel@gmx.de>
parents: 1470
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18 a->alloc = MP_PREC;
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Steffen Jaeckel <s_jaeckel@gmx.de>
parents: 1470
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19 a->sign = MP_ZPOS;
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20
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parents: 1470
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21 return MP_OKAY;
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22 }
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23 #endif