Mercurial > dropbear

annotate libtomcrypt/src/encauth/chachapoly/chacha20poly1305_done.c @ 1851:7f549ee3df48

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Use HOME before /etc/passwd to find id_dropbear (#137) Currently dbclient uses the value of HOME by default when looking for ~/.ssh/known_hosts, falling back to /etc/passwd if HOME is not set (so that people can work around broken values in /etc/passwd). However, when locating the default authentication key (defaults to ~/.ssh/id_dropbear), paths not starting with / are always prefixed with the value from /etc/passwd. Make the behaviour consistent by adjusting expand_homedir_path to use the value of HOME, falling back to /etc/passwd if HOME is not set.
author Matt Robinson <git@nerdoftheherd.com>
date Tue, 19 Oct 2021 06:02:47 +0100
parents 6dba84798cd5
children
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1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
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2 *
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3 * LibTomCrypt is a library that provides various cryptographic
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4 * algorithms in a highly modular and flexible manner.
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5 *
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6 * The library is free for all purposes without any express
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7 * guarantee it works.
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8 */
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9
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10 #include "tomcrypt.h"
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11
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12 #ifdef LTC_CHACHA20POLY1305_MODE
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13
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14 /**
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15 Terminate a ChaCha20Poly1305 stream
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16 @param st The ChaCha20Poly1305 state
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17 @param tag [out] The destination for the MAC tag
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18 @param taglen [in/out] The length of the MAC tag
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19 @return CRYPT_OK on success
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20 */
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21 int chacha20poly1305_done(chacha20poly1305_state *st, unsigned char *tag, unsigned long *taglen)
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22 {
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23 unsigned char padzero[16] = { 0 };
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24 unsigned long padlen;
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25 unsigned char buf[16];
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26 int err;
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27
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28 LTC_ARGCHK(st != NULL);
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29
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30 padlen = 16 - (unsigned long)(st->ctlen % 16);
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31 if (padlen < 16) {
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32 if ((err = poly1305_process(&st->poly, padzero, padlen)) != CRYPT_OK) return err;
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33 }
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34 STORE64L(st->aadlen, buf);
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35 STORE64L(st->ctlen, buf + 8);
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36 if ((err = poly1305_process(&st->poly, buf, 16)) != CRYPT_OK) return err;
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37 if ((err = poly1305_done(&st->poly, tag, taglen)) != CRYPT_OK) return err;
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38 if ((err = chacha_done(&st->chacha)) != CRYPT_OK) return err;
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39 return CRYPT_OK;
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40 }
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41
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42 #endif
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43
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44 /* ref: $Format:%D$ */
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45 /* git commit: $Format:%H$ */
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46 /* commit time: $Format:%ai$ */