Mercurial > dropbear

annotate libtomcrypt/src/mac/blake2/blake2smac_file.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 e9dba7abd939
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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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
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10 #include "tomcrypt.h"
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11
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12 #ifdef LTC_BLAKE2SMAC
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13
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14 /**
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15 BLAKE2S MAC a file
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16 @param fname The name of the file you wish to BLAKE2S MAC
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17 @param key The secret key
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18 @param keylen The length of the secret key
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19 @param mac [out] The BLAKE2S MAC authentication tag
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20 @param maclen [in/out] The max size and resulting size of the authentication tag
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21 @return CRYPT_OK if successful, CRYPT_NOP if file support has been disabled
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22 */
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23 int blake2smac_file(const char *fname, const unsigned char *key, unsigned long keylen, unsigned char *mac, unsigned long *maclen)
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24 {
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25 #ifdef LTC_NO_FILE
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26 return CRYPT_NOP;
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27 #else
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28 blake2smac_state st;
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29 FILE *in;
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30 unsigned char *buf;
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31 size_t x;
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32 int err;
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33
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34 LTC_ARGCHK(fname != NULL);
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35 LTC_ARGCHK(key != NULL);
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36 LTC_ARGCHK(mac != NULL);
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37 LTC_ARGCHK(maclen != NULL);
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38
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39 if ((buf = XMALLOC(LTC_FILE_READ_BUFSIZE)) == NULL) {
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40 return CRYPT_MEM;
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41 }
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42
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43 if ((err = blake2smac_init(&st, *maclen, key, keylen)) != CRYPT_OK) {
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44 goto LBL_ERR;
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45 }
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46
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47 in = fopen(fname, "rb");
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48 if (in == NULL) {
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49 err = CRYPT_FILE_NOTFOUND;
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50 goto LBL_ERR;
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51 }
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52
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53 do {
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54 x = fread(buf, 1, LTC_FILE_READ_BUFSIZE, in);
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55 if ((err = blake2smac_process(&st, buf, (unsigned long)x)) != CRYPT_OK) {
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56 fclose(in);
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57 goto LBL_CLEANBUF;
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58 }
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59 } while (x == LTC_FILE_READ_BUFSIZE);
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60
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61 if (fclose(in) != 0) {
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62 err = CRYPT_ERROR;
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63 goto LBL_CLEANBUF;
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64 }
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65
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66 err = blake2smac_done(&st, mac, maclen);
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67
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68 LBL_CLEANBUF:
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69 zeromem(buf, LTC_FILE_READ_BUFSIZE);
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70 LBL_ERR:
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71 #ifdef LTC_CLEAN_STACK
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72 zeromem(&st, sizeof(blake2smac_state));
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73 #endif
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74 XFREE(buf);
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75 return err;
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76 #endif
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77 }
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78
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79 #endif
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80
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81 /* ref: $Format:%D$ */
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82 /* git commit: $Format:%H$ */
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83 /* commit time: $Format:%ai$ */