Mercurial > dropbear

annotate libtomcrypt/src/encauth/eax/eax_encrypt_authenticate_memory.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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rev   line source
285
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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 *
382
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9 * Tom St Denis, [email protected], http://libtomcrypt.com
285
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10 */
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11
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12 /**
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13 @file eax_encrypt_authenticate_memory.c
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14 EAX implementation, encrypt a block of memory, by Tom St Denis
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15 */
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16 #include "tomcrypt.h"
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17
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18 #ifdef EAX_MODE
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19
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20 /**
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21 EAX encrypt and produce an authentication tag
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22 @param cipher The index of the cipher desired
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23 @param key The secret key to use
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24 @param keylen The length of the secret key (octets)
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25 @param nonce The session nonce [use once]
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26 @param noncelen The length of the nonce
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27 @param header The header for the session
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28 @param headerlen The length of the header (octets)
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29 @param pt The plaintext
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30 @param ptlen The length of the plaintext (octets)
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31 @param ct [out] The ciphertext
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32 @param tag [out] The destination tag
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33 @param taglen [in/out] The max size and resulting size of the authentication tag
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34 @return CRYPT_OK if successful
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35 */
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36 int eax_encrypt_authenticate_memory(int cipher,
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37 const unsigned char *key, unsigned long keylen,
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38 const unsigned char *nonce, unsigned long noncelen,
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39 const unsigned char *header, unsigned long headerlen,
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40 const unsigned char *pt, unsigned long ptlen,
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41 unsigned char *ct,
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42 unsigned char *tag, unsigned long *taglen)
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43 {
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44 int err;
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45 eax_state *eax;
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46
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47 LTC_ARGCHK(key != NULL);
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48 LTC_ARGCHK(pt != NULL);
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49 LTC_ARGCHK(ct != NULL);
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50 LTC_ARGCHK(tag != NULL);
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51 LTC_ARGCHK(taglen != NULL);
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52
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53 eax = XMALLOC(sizeof(*eax));
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54
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55 if ((err = eax_init(eax, cipher, key, keylen, nonce, noncelen, header, headerlen)) != CRYPT_OK) {
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56 goto LBL_ERR;
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57 }
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58
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59 if ((err = eax_encrypt(eax, pt, ct, ptlen)) != CRYPT_OK) {
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60 goto LBL_ERR;
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61 }
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62
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63 if ((err = eax_done(eax, tag, taglen)) != CRYPT_OK) {
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64 goto LBL_ERR;
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65 }
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66
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67 err = CRYPT_OK;
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68 LBL_ERR:
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69 #ifdef LTC_CLEAN_STACK
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70 zeromem(eax, sizeof(*eax));
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71 #endif
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72
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73 XFREE(eax);
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74
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75 return err;
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76 }
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77
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78 #endif
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79
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80 /* $Source: /cvs/libtom/libtomcrypt/src/encauth/eax/eax_encrypt_authenticate_memory.c,v $ */
382
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81 /* $Revision: 1.4 $ */
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82 /* $Date: 2006/03/31 14:15:35 $ */