Mercurial > dropbear

annotate libtomcrypt/src/mac/poly1305/poly1305_file.c @ 1857:6022df862942

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Use DSCP for IP QoS traffic classes The previous TOS values are deprecated and not used by modern traffic classifiers. This sets AF21 for "interactive" traffic (with a tty). Non-tty traffic sets AF11 - that indicates high throughput but is not lowest priority (which would be CS1 or LE). This differs from the CS1 used by OpenSSH, it lets interactive git over SSH have higher priority than background least effort traffic. Dropbear's settings here should be suitable with the diffservs used by CAKE qdisc.
author Matt Johnston <matt@ucc.asn.au>
date Tue, 25 Jan 2022 17:32:20 +0800
parents e9dba7abd939
children
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 /* The implementation is based on:
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11 * Public Domain poly1305 from Andrew Moon
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12 * https://github.com/floodyberry/poly1305-donna
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13 */
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14
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15 #include "tomcrypt.h"
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16
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17 #ifdef LTC_POLY1305
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18
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19 /**
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20 POLY1305 a file
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21 @param fname The name of the file you wish to POLY1305
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22 @param key The secret key
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23 @param keylen The length of the secret key
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24 @param mac [out] The POLY1305 authentication tag
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25 @param maclen [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 poly1305_file(const char *fname, const unsigned char *key, unsigned long keylen, unsigned char *mac, unsigned long *maclen)
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29 {
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30 #ifdef LTC_NO_FILE
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31 LTC_UNUSED_PARAM(fname);
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32 LTC_UNUSED_PARAM(key);
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33 LTC_UNUSED_PARAM(keylen);
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34 LTC_UNUSED_PARAM(mac);
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35 LTC_UNUSED_PARAM(maclen);
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36 return CRYPT_NOP;
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37 #else
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38 poly1305_state st;
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39 FILE *in;
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40 unsigned char *buf;
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41 size_t x;
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42 int err;
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43
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44 LTC_ARGCHK(fname != NULL);
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45 LTC_ARGCHK(key != NULL);
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46 LTC_ARGCHK(mac != NULL);
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47 LTC_ARGCHK(maclen != NULL);
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48
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49 if ((buf = XMALLOC(LTC_FILE_READ_BUFSIZE)) == NULL) {
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50 return CRYPT_MEM;
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51 }
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52
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53 if ((err = poly1305_init(&st, key, keylen)) != CRYPT_OK) {
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54 goto LBL_ERR;
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55 }
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56
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57 in = fopen(fname, "rb");
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58 if (in == NULL) {
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59 err = CRYPT_FILE_NOTFOUND;
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60 goto LBL_ERR;
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61 }
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62
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63 do {
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64 x = fread(buf, 1, LTC_FILE_READ_BUFSIZE, in);
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65 if ((err = poly1305_process(&st, buf, (unsigned long)x)) != CRYPT_OK) {
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66 fclose(in);
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67 goto LBL_CLEANBUF;
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68 }
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69 } while (x == LTC_FILE_READ_BUFSIZE);
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70
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71 if (fclose(in) != 0) {
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72 err = CRYPT_ERROR;
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73 goto LBL_CLEANBUF;
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74 }
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75
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76 err = poly1305_done(&st, mac, maclen);
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77
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78 LBL_CLEANBUF:
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79 zeromem(buf, LTC_FILE_READ_BUFSIZE);
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80 LBL_ERR:
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81 #ifdef LTC_CLEAN_STACK
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82 zeromem(&st, sizeof(poly1305_state));
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83 #endif
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84 XFREE(buf);
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85 return err;
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86 #endif
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87 }
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88
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89 #endif
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90
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91 /* ref: $Format:%D$ */
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92 /* git commit: $Format:%H$ */
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93 /* commit time: $Format:%ai$ */