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annotate libtommath/bn_mp_to_ubin.c @ 1921:284c3837891c

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Allow user space file locations (rootless support) Why: Running dropbear as a user (rootless) is aided if files and programs can be saved/removed without needing sudo. What: Use the same convention as DROPBEAR_DEFAULT_CLI_AUTHKEY; if not starting with '/', then is relative to hedge's /home/hedge: *_PRIV_FILENAME DROPBEAR_PIDFILE SFTPSERVER_PATH default_options.h commentary added. Changes kept to a minimum, so log entry in svr_kex.c#163 is refactored. From: Generated hostkey is <path> ... <finger-print> to: Generated hostkey path is <path> Generated hostkey fingerprint is <fp> Otherwise the unexpanded path was reported. Patch modified by Matt Johnston Signed-off-by: Begley Brothers Inc <[email protected]>
author Begley Brothers Inc <begleybrothers@gmail.com>
date Thu, 09 Jul 2020 17:47:58 +1000
parents 1051e4eea25a
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1692
1051e4eea25a Update LibTomMath to 1.2.0 (#84)
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1 #include "tommath_private.h"
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2 #ifdef BN_MP_TO_UBIN_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 /* store in unsigned [big endian] format */
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7 mp_err mp_to_ubin(const mp_int *a, unsigned char *buf, size_t maxlen, size_t *written)
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8 {
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9 size_t x, count;
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10 mp_err err;
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11 mp_int t;
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12
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13 count = mp_ubin_size(a);
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14 if (count > maxlen) {
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15 return MP_BUF;
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16 }
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17
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18 if ((err = mp_init_copy(&t, a)) != MP_OKAY) {
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19 return err;
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20 }
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21
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22 for (x = count; x --> 0u;) {
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23 #ifndef MP_8BIT
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24 buf[x] = (unsigned char)(t.dp[0] & 255u);
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25 #else
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26 buf[x] = (unsigned char)(t.dp[0] | ((t.dp[1] & 1u) << 7));
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27 #endif
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28 if ((err = mp_div_2d(&t, 8, &t, NULL)) != MP_OKAY) {
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29 goto LBL_ERR;
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30 }
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31 }
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32
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33 if (written != NULL) {
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34 *written = count;
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35 }
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36
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37 LBL_ERR:
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38 mp_clear(&t);
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39 return err;
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40 }
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41 #endif