Mercurial > dropbear

annotate libtomcrypt/src/mac/pmac/pmac_done.c @ 1629:258b57b208ae

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Fix for issue successfull login of disabled user (#78) This commit introduces fix for scenario: 1. Root login disabled on dropbear 2. PAM authentication model enabled While login as root user, after prompt for password user is being notified about login failrue, but after second attempt of prompt for password within same session, login becames succesfull. Signed-off-by: Pawel Rapkiewicz <[email protected]>
author vincentto13 <33652988+vincentto13@users.noreply.github.com>
date Wed, 20 Mar 2019 15:03:40 +0100
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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10
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6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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11 /**
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12 @file pmac_done.c
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13 PMAC implementation, terminate a session, by Tom St Denis
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14 */
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16 #ifdef LTC_PMAC
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18 int pmac_done(pmac_state *state, unsigned char *out, unsigned long *outlen)
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19 {
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20 int err, x;
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22 LTC_ARGCHK(state != NULL);
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23 LTC_ARGCHK(out != NULL);
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24 if ((err = cipher_is_valid(state->cipher_idx)) != CRYPT_OK) {
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25 return err;
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26 }
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28 if ((state->buflen > (int)sizeof(state->block)) || (state->buflen < 0) ||
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29 (state->block_len > (int)sizeof(state->block)) || (state->buflen > state->block_len)) {
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30 return CRYPT_INVALID_ARG;
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31 }
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34 /* handle padding. If multiple xor in L/x */
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36 if (state->buflen == state->block_len) {
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37 /* xor Lr against the checksum */
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38 for (x = 0; x < state->block_len; x++) {
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39 state->checksum[x] ^= state->block[x] ^ state->Lr[x];
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40 }
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41 } else {
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42 /* otherwise xor message bytes then the 0x80 byte */
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43 for (x = 0; x < state->buflen; x++) {
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44 state->checksum[x] ^= state->block[x];
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45 }
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46 state->checksum[x] ^= 0x80;
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47 }
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49 /* encrypt it */
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50 if ((err = cipher_descriptor[state->cipher_idx].ecb_encrypt(state->checksum, state->checksum, &state->key)) != CRYPT_OK) {
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51 return err;
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52 }
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53 cipher_descriptor[state->cipher_idx].done(&state->key);
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54
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55 /* store it */
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56 for (x = 0; x < state->block_len && x < (int)*outlen; x++) {
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57 out[x] = state->checksum[x];
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58 }
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59 *outlen = x;
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61 #ifdef LTC_CLEAN_STACK
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62 zeromem(state, sizeof(*state));
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63 #endif
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64 return CRYPT_OK;
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65 }
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67 #endif
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69
1471
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70 /* ref: $Format:%D$ */
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71 /* git commit: $Format:%H$ */
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72 /* commit time: $Format:%ai$ */