Mercurial > dropbear

annotate libtomcrypt/src/mac/pmac/pmac_file.c @ 1505:55120acb9994

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Add Spectre v2 mitigations for GCC (#54)
author Loganaden Velvindron <logan@hackers.mu>
date Fri, 16 Feb 2018 19:35:32 +0400
parents 6dba84798cd5
children e9dba7abd939
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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diff changeset
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_file.c
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13 PMAC implementation, process a file, by Tom St Denis
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14 */
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15
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16 #ifdef LTC_PMAC
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18 /**
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19 PMAC a file
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20 @param cipher The index of the cipher desired
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21 @param key The secret key
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22 @param keylen The length of the secret key (octets)
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23 @param filename The name of the file to send through PMAC
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24 @param out [out] Destination for the authentication tag
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25 @param outlen [in/out] Max size and resulting size of the authentication tag
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26 @return CRYPT_OK if successful, CRYPT_NOP if file support has been disabled
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27 */
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6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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28 int pmac_file(int cipher,
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29 const unsigned char *key, unsigned long keylen,
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30 const char *filename,
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31 unsigned char *out, unsigned long *outlen)
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32 {
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33 #ifdef LTC_NO_FILE
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34 return CRYPT_NOP;
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35 #else
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6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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36 size_t x;
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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37 int err;
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38 pmac_state pmac;
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39 FILE *in;
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6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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40 unsigned char *buf;
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43 LTC_ARGCHK(key != NULL);
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44 LTC_ARGCHK(filename != NULL);
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45 LTC_ARGCHK(out != NULL);
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46 LTC_ARGCHK(outlen != NULL);
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47
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6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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48 if ((buf = XMALLOC(LTC_FILE_READ_BUFSIZE)) == NULL) {
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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49 return CRYPT_MEM;
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50 }
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51
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52 if ((err = pmac_init(&pmac, cipher, key, keylen)) != CRYPT_OK) {
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6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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53 goto LBL_ERR;
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54 }
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55
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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56 in = fopen(filename, "rb");
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57 if (in == NULL) {
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58 err = CRYPT_FILE_NOTFOUND;
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59 goto LBL_ERR;
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60 }
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61
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62 do {
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6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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63 x = fread(buf, 1, LTC_FILE_READ_BUFSIZE, in);
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64 if ((err = pmac_process(&pmac, buf, (unsigned long)x)) != CRYPT_OK) {
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65 fclose(in);
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66 goto LBL_CLEANBUF;
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67 }
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68 } while (x == LTC_FILE_READ_BUFSIZE);
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69
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6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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70 if (fclose(in) != 0) {
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71 err = CRYPT_ERROR;
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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72 goto LBL_CLEANBUF;
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73 }
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74
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75 err = pmac_done(&pmac, out, outlen);
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76
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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77 LBL_CLEANBUF:
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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78 zeromem(buf, LTC_FILE_READ_BUFSIZE);
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79 LBL_ERR:
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80 #ifdef LTC_CLEAN_STACK
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81 zeromem(&pmac, sizeof(pmac_state));
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82 #endif
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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83 XFREE(buf);
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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84 return err;
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85 #endif
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86 }
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87
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88 #endif
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89
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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90 /* ref: $Format:%D$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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91 /* git commit: $Format:%H$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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diff changeset
92 /* commit time: $Format:%ai$ */