Mercurial > dropbear

annotate libtomcrypt/src/modes/cbc/cbc_start.c @ 1902:4a6725ac957c

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Revert "Don't include sk keys at all in KEX list" This reverts git commit f972813ecdc7bb981d25b5a63638bd158f1c8e72. The sk algorithms need to remain in the sigalgs list so that they are included in the server-sig-algs ext-info message sent by the server. RFC8308 for server-sig-algs requires that all algorithms are listed (though OpenSSH client 8.4p1 tested doesn't require that)
author Matt Johnston <matt@ucc.asn.au>
date Thu, 24 Mar 2022 13:42:08 +0800
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: $Format:%ai$ */