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annotate libtomcrypt/src/encauth/chachapoly/chacha20poly1305_encrypt.c @ 1629:258b57b208ae

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Fix for issue successfull login of disabled user (#78) This commit introduces fix for scenario: 1. Root login disabled on dropbear 2. PAM authentication model enabled While login as root user, after prompt for password user is being notified about login failrue, but after second attempt of prompt for password within same session, login becames succesfull. Signed-off-by: Pawel Rapkiewicz <[email protected]>
author vincentto13 <33652988+vincentto13@users.noreply.github.com>
date Wed, 20 Mar 2019 15:03:40 +0100
parents 6dba84798cd5
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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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 Encrypt bytes of ciphertext with ChaCha20Poly1305
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16 @param st The ChaCha20Poly1305 state
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17 @param in The plaintext
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18 @param inlen The length of the input (octets)
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19 @param out [out] The ciphertext (length inlen)
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20 @return CRYPT_OK if successful
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21 */
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22 int chacha20poly1305_encrypt(chacha20poly1305_state *st, const unsigned char *in, unsigned long inlen, unsigned char *out)
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23 {
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24 unsigned char padzero[16] = { 0 };
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25 unsigned long padlen;
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26 int err;
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27
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28 if (inlen == 0) return CRYPT_OK; /* nothing to do */
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29 LTC_ARGCHK(st != NULL);
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30
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31 if ((err = chacha_crypt(&st->chacha, in, inlen, out)) != CRYPT_OK) return err;
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32 if (st->aadflg) {
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33 padlen = 16 - (unsigned long)(st->aadlen % 16);
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34 if (padlen < 16) {
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35 if ((err = poly1305_process(&st->poly, padzero, padlen)) != CRYPT_OK) return err;
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36 }
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37 st->aadflg = 0; /* no more AAD */
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38 }
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39 if ((err = poly1305_process(&st->poly, out, inlen)) != CRYPT_OK) return err;
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40 st->ctlen += (ulong64)inlen;
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41 return CRYPT_OK;
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42 }
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43
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44 #endif
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45
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46 /* ref: $Format:%D$ */
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47 /* git commit: $Format:%H$ */
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48 /* commit time: $Format:%ai$ */