Mercurial > dropbear

annotate libtomcrypt/src/modes/cbc/cbc_start.c @ 1665:7c17995bcdfb

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Improve address logging on early exit messages (#83) Change 'Early exit' and 'Exit before auth' messages to include the IP address & port as part of the message. This allows log scanning utilities such as 'fail2ban' to obtain the offending IP address as part of the failure event instead of extracting the PID from the message and then scanning the log again for match 'child connection from' messages Signed-off-by: Kevin Darbyshire-Bryant <[email protected]>
author Kevin Darbyshire-Bryant <6500011+ldir-EDB0@users.noreply.github.com>
date Wed, 18 Mar 2020 15:28:56 +0000
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 #include "tomcrypt.h"
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11 /**
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12 @file cbc_start.c
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13 CBC implementation, start chain, Tom St Denis
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14 */
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16 #ifdef LTC_CBC_MODE
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18 /**
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19 Initialize a CBC context
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20 @param cipher The index of the cipher desired
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21 @param IV The initialization vector
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22 @param key The secret key
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23 @param keylen The length of the secret key (octets)
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24 @param num_rounds Number of rounds in the cipher desired (0 for default)
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25 @param cbc The CBC state to initialize
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26 @return CRYPT_OK if successful
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27 */
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28 int cbc_start(int cipher, const unsigned char *IV, const unsigned char *key,
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29 int keylen, int num_rounds, symmetric_CBC *cbc)
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30 {
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31 int x, err;
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32
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33 LTC_ARGCHK(IV != NULL);
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34 LTC_ARGCHK(key != NULL);
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35 LTC_ARGCHK(cbc != NULL);
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37 /* bad param? */
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38 if ((err = cipher_is_valid(cipher)) != CRYPT_OK) {
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39 return err;
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40 }
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42 /* setup cipher */
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43 if ((err = cipher_descriptor[cipher].setup(key, keylen, num_rounds, &cbc->key)) != CRYPT_OK) {
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44 return err;
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45 }
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47 /* copy IV */
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48 cbc->blocklen = cipher_descriptor[cipher].block_length;
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49 cbc->cipher = cipher;
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50 for (x = 0; x < cbc->blocklen; x++) {
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51 cbc->IV[x] = IV[x];
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52 }
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53 return CRYPT_OK;
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54 }
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56 #endif
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57
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58 /* ref: $Format:%D$ */
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59 /* git commit: $Format:%H$ */
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60 /* commit time: $Format:%ai$ */