Mercurial > dropbear

annotate libtomcrypt/src/mac/omac/omac_file.c @ 1902:4a6725ac957c

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Revert "Don't include sk keys at all in KEX list" This reverts git commit f972813ecdc7bb981d25b5a63638bd158f1c8e72. The sk algorithms need to remain in the sigalgs list so that they are included in the server-sig-algs ext-info message sent by the server. RFC8308 for server-sig-algs requires that all algorithms are listed (though OpenSSH client 8.4p1 tested doesn't require that)
author Matt Johnston <matt@ucc.asn.au>
date Thu, 24 Mar 2022 13:42:08 +0800
parents e9dba7abd939
children
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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 omac_file.c
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13 OMAC1 support, process a file, Tom St Denis
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14 */
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16 #ifdef LTC_OMAC
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18 /**
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19 OMAC 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 you wish to OMAC
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24 @param out [out] Where the authentication tag is to be stored
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25 @param outlen [in/out] The 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 omac_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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42 size_t x;
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43 int err;
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44 omac_state omac;
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45 FILE *in;
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46 unsigned char *buf;
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47
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48 LTC_ARGCHK(key != NULL);
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49 LTC_ARGCHK(filename != NULL);
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50 LTC_ARGCHK(out != NULL);
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51 LTC_ARGCHK(outlen != NULL);
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52
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53 if ((buf = XMALLOC(LTC_FILE_READ_BUFSIZE)) == NULL) {
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54 return CRYPT_MEM;
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55 }
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56
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57 if ((err = omac_init(&omac, cipher, key, keylen)) != CRYPT_OK) {
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58 goto LBL_ERR;
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59 }
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60
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61 in = fopen(filename, "rb");
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62 if (in == NULL) {
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63 err = CRYPT_FILE_NOTFOUND;
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64 goto LBL_ERR;
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65 }
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66
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67 do {
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68 x = fread(buf, 1, LTC_FILE_READ_BUFSIZE, in);
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69 if ((err = omac_process(&omac, buf, (unsigned long)x)) != CRYPT_OK) {
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70 fclose(in);
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71 goto LBL_CLEANBUF;
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72 }
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73 } while (x == LTC_FILE_READ_BUFSIZE);
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74
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75 if (fclose(in) != 0) {
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76 err = CRYPT_ERROR;
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77 goto LBL_CLEANBUF;
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78 }
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79
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80 err = omac_done(&omac, out, outlen);
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81
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82 LBL_CLEANBUF:
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83 zeromem(buf, LTC_FILE_READ_BUFSIZE);
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84 LBL_ERR:
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85 #ifdef LTC_CLEAN_STACK
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86 zeromem(&omac, sizeof(omac_state));
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87 #endif
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88 XFREE(buf);
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89 return err;
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90 #endif
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91 }
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93 #endif
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94
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95 /* ref: $Format:%D$ */
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96 /* git commit: $Format:%H$ */
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97 /* commit time: $Format:%ai$ */