Mercurial > dropbear

annotate libtomcrypt/src/modes/cbc/cbc_start.c @ 1156:a8f4dade70e5

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avoid getpass when not used some systems (like android's bionic) do not provide getpass. you can disable ENABLE_CLI_PASSWORD_AUTH & ENABLE_CLI_INTERACT_AUTH to avoid its use (and rely on pubkey auth), but the link still fails because the support file calls getpass. do not define this func if both of those auth methods are not used.
author Mike Frysinger <vapier@gentoo.org>
date Wed, 21 Oct 2015 22:39:55 +0800
parents 0cbe8f6dbf9e
children f849a5ca2efc
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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 * Tom St Denis, [email protected], http://libtomcrypt.com
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10 */
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11 #include "tomcrypt.h"
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13 /**
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14 @file cbc_start.c
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15 CBC implementation, start chain, Tom St Denis
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16 */
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17
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18 #ifdef LTC_CBC_MODE
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20 /**
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21 Initialize a CBC context
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22 @param cipher The index of the cipher desired
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23 @param IV The initial vector
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24 @param key The secret key
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25 @param keylen The length of the secret key (octets)
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26 @param num_rounds Number of rounds in the cipher desired (0 for default)
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27 @param cbc The CBC state to initialize
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28 @return CRYPT_OK if successful
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29 */
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30 int cbc_start(int cipher, const unsigned char *IV, const unsigned char *key,
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31 int keylen, int num_rounds, symmetric_CBC *cbc)
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32 {
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33 int x, err;
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35 LTC_ARGCHK(IV != NULL);
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36 LTC_ARGCHK(key != NULL);
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37 LTC_ARGCHK(cbc != NULL);
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39 /* bad param? */
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40 if ((err = cipher_is_valid(cipher)) != CRYPT_OK) {
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41 return err;
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42 }
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44 /* setup cipher */
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45 if ((err = cipher_descriptor[cipher].setup(key, keylen, num_rounds, &cbc->key)) != CRYPT_OK) {
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46 return err;
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47 }
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49 /* copy IV */
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50 cbc->blocklen = cipher_descriptor[cipher].block_length;
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51 cbc->cipher = cipher;
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52 for (x = 0; x < cbc->blocklen; x++) {
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53 cbc->IV[x] = IV[x];
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54 }
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55 return CRYPT_OK;
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56 }
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58 #endif
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60 /* $Source: /cvs/libtom/libtomcrypt/src/modes/cbc/cbc_start.c,v $ */
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61 /* $Revision: 1.5 $ */
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62 /* $Date: 2006/06/29 01:46:46 $ */