Mercurial > dropbear

annotate libtomcrypt/src/mac/pmac/pmac_file.c @ 1868:66a3fabe4870

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merge
author Matt Johnston <matt@ucc.asn.au>
date Tue, 01 Feb 2022 15:51:01 +0800
parents e9dba7abd939
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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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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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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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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 LTC_UNUSED_PARAM(cipher);
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35 LTC_UNUSED_PARAM(key);
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36 LTC_UNUSED_PARAM(keylen);
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37 LTC_UNUSED_PARAM(filename);
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38 LTC_UNUSED_PARAM(out);
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39 LTC_UNUSED_PARAM(outlen);
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40 return CRYPT_NOP;
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41 #else
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6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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42 size_t x;
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43 int err;
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44 pmac_state pmac;
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45 FILE *in;
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46 unsigned char *buf;
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49 LTC_ARGCHK(key != NULL);
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50 LTC_ARGCHK(filename != NULL);
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51 LTC_ARGCHK(out != NULL);
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52 LTC_ARGCHK(outlen != NULL);
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53
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54 if ((buf = XMALLOC(LTC_FILE_READ_BUFSIZE)) == NULL) {
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55 return CRYPT_MEM;
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56 }
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57
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58 if ((err = pmac_init(&pmac, cipher, key, keylen)) != CRYPT_OK) {
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59 goto LBL_ERR;
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60 }
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61
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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62 in = fopen(filename, "rb");
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63 if (in == NULL) {
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64 err = CRYPT_FILE_NOTFOUND;
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65 goto LBL_ERR;
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66 }
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67
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68 do {
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69 x = fread(buf, 1, LTC_FILE_READ_BUFSIZE, in);
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70 if ((err = pmac_process(&pmac, buf, (unsigned long)x)) != CRYPT_OK) {
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71 fclose(in);
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72 goto LBL_CLEANBUF;
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73 }
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74 } while (x == LTC_FILE_READ_BUFSIZE);
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75
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76 if (fclose(in) != 0) {
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77 err = CRYPT_ERROR;
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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78 goto LBL_CLEANBUF;
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79 }
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80
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81 err = pmac_done(&pmac, out, outlen);
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82
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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83 LBL_CLEANBUF:
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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84 zeromem(buf, LTC_FILE_READ_BUFSIZE);
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85 LBL_ERR:
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86 #ifdef LTC_CLEAN_STACK
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87 zeromem(&pmac, sizeof(pmac_state));
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88 #endif
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89 XFREE(buf);
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90 return err;
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91 #endif
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92 }
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94 #endif
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95
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96 /* ref: $Format:%D$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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97 /* git commit: $Format:%H$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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98 /* commit time: $Format:%ai$ */