Mercurial > dropbear

annotate libtomcrypt/src/mac/pmac/pmac_done.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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12
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13 /**
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14 @file pmac_done.c
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15 PMAC implementation, terminate a session, by Tom St Denis
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16 */
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17
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18 #ifdef LTC_PMAC
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20 int pmac_done(pmac_state *state, unsigned char *out, unsigned long *outlen)
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21 {
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22 int err, x;
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24 LTC_ARGCHK(state != NULL);
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25 LTC_ARGCHK(out != NULL);
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26 if ((err = cipher_is_valid(state->cipher_idx)) != CRYPT_OK) {
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27 return err;
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28 }
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30 if ((state->buflen > (int)sizeof(state->block)) || (state->buflen < 0) ||
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31 (state->block_len > (int)sizeof(state->block)) || (state->buflen > state->block_len)) {
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32 return CRYPT_INVALID_ARG;
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33 }
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36 /* handle padding. If multiple xor in L/x */
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38 if (state->buflen == state->block_len) {
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39 /* xor Lr against the checksum */
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40 for (x = 0; x < state->block_len; x++) {
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41 state->checksum[x] ^= state->block[x] ^ state->Lr[x];
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42 }
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43 } else {
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44 /* otherwise xor message bytes then the 0x80 byte */
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45 for (x = 0; x < state->buflen; x++) {
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46 state->checksum[x] ^= state->block[x];
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47 }
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48 state->checksum[x] ^= 0x80;
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49 }
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50
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51 /* encrypt it */
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52 if ((err = cipher_descriptor[state->cipher_idx].ecb_encrypt(state->checksum, state->checksum, &state->key)) != CRYPT_OK) {
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53 return err;
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54 }
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55 cipher_descriptor[state->cipher_idx].done(&state->key);
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56
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57 /* store it */
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58 for (x = 0; x < state->block_len && x < (int)*outlen; x++) {
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59 out[x] = state->checksum[x];
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60 }
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61 *outlen = x;
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62
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63 #ifdef LTC_CLEAN_STACK
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64 zeromem(state, sizeof(*state));
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65 #endif
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66 return CRYPT_OK;
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67 }
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68
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69 #endif
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72 /* $Source: /cvs/libtom/libtomcrypt/src/mac/pmac/pmac_done.c,v $ */
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73 /* $Revision: 1.8 $ */
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74 /* $Date: 2006/11/03 00:39:49 $ */