annotate libtomcrypt/src/mac/omac/omac_process.c @ 1156:a8f4dade70e5

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
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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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12
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13 /**
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14 @file omac_process.c
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15 OMAC1 support, process data, Tom St Denis
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16 */
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17
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18
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19 #ifdef LTC_OMAC
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20
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21 /**
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22 Process data through OMAC
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23 @param omac The OMAC state
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24 @param in The input data to send through OMAC
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25 @param inlen The length of the input (octets)
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26 @return CRYPT_OK if successful
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27 */
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28 int omac_process(omac_state *omac, const unsigned char *in, unsigned long inlen)
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29 {
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30 unsigned long n, x;
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31 int err;
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32
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33 LTC_ARGCHK(omac != NULL);
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34 LTC_ARGCHK(in != NULL);
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35 if ((err = cipher_is_valid(omac->cipher_idx)) != CRYPT_OK) {
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36 return err;
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37 }
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38
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39 if ((omac->buflen > (int)sizeof(omac->block)) || (omac->buflen < 0) ||
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40 (omac->blklen > (int)sizeof(omac->block)) || (omac->buflen > omac->blklen)) {
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41 return CRYPT_INVALID_ARG;
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42 }
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43
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44 #ifdef LTC_FAST
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45 if (omac->buflen == 0 && inlen > 16) {
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46 int y;
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47 for (x = 0; x < (inlen - 16); x += 16) {
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48 for (y = 0; y < 16; y += sizeof(LTC_FAST_TYPE)) {
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49 *((LTC_FAST_TYPE*)(&omac->prev[y])) ^= *((LTC_FAST_TYPE*)(&in[y]));
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50 }
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51 in += 16;
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52 if ((err = cipher_descriptor[omac->cipher_idx].ecb_encrypt(omac->prev, omac->prev, &omac->key)) != CRYPT_OK) {
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53 return err;
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54 }
285
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55 }
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56 inlen -= x;
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57 }
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58 #endif
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59
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60 while (inlen != 0) {
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61 /* ok if the block is full we xor in prev, encrypt and replace prev */
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62 if (omac->buflen == omac->blklen) {
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63 for (x = 0; x < (unsigned long)omac->blklen; x++) {
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64 omac->block[x] ^= omac->prev[x];
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65 }
382
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66 if ((err = cipher_descriptor[omac->cipher_idx].ecb_encrypt(omac->block, omac->prev, &omac->key)) != CRYPT_OK) {
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67 return err;
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68 }
285
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69 omac->buflen = 0;
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70 }
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71
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72 /* add bytes */
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73 n = MIN(inlen, (unsigned long)(omac->blklen - omac->buflen));
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74 XMEMCPY(omac->block + omac->buflen, in, n);
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75 omac->buflen += n;
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76 inlen -= n;
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77 in += n;
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78 }
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79
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80 return CRYPT_OK;
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81 }
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82
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83 #endif
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84
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85
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86 /* $Source: /cvs/libtom/libtomcrypt/src/mac/omac/omac_process.c,v $ */
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diff changeset
87 /* $Revision: 1.9 $ */
0cbe8f6dbf9e propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)
Matt Johnston <matt@ucc.asn.au>
parents: 285
diff changeset
88 /* $Date: 2006/11/03 00:39:49 $ */