Mercurial > dropbear

annotate libtomcrypt/src/mac/f9/f9_process.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 6dba84798cd5
children
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382
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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 #include "tomcrypt.h"
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10
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11 /**
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12 @file f9_process.c
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13 f9 Support, process blocks with f9
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14 */
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15
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16 #ifdef LTC_F9_MODE
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17
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18 /** Process data through f9-MAC
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19 @param f9 The f9-MAC state
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20 @param in Input data to process
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21 @param inlen Length of input in octets
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22 Return CRYPT_OK on success
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23 */
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24 int f9_process(f9_state *f9, const unsigned char *in, unsigned long inlen)
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25 {
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26 int err, x;
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27
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28 LTC_ARGCHK(f9 != NULL);
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29 LTC_ARGCHK(in != NULL);
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30
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31 /* check structure */
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32 if ((err = cipher_is_valid(f9->cipher)) != CRYPT_OK) {
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33 return err;
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34 }
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35
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36 if ((f9->blocksize > cipher_descriptor[f9->cipher].block_length) || (f9->blocksize < 0) ||
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37 (f9->buflen > f9->blocksize) || (f9->buflen < 0)) {
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38 return CRYPT_INVALID_ARG;
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39 }
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40
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41 #ifdef LTC_FAST
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42 if (f9->buflen == 0) {
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43 while (inlen >= (unsigned long)f9->blocksize) {
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44 for (x = 0; x < f9->blocksize; x += sizeof(LTC_FAST_TYPE)) {
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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45 *(LTC_FAST_TYPE_PTR_CAST(&(f9->IV[x]))) ^= *(LTC_FAST_TYPE_PTR_CAST(&(in[x])));
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46 }
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47 cipher_descriptor[f9->cipher].ecb_encrypt(f9->IV, f9->IV, &f9->key);
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48 for (x = 0; x < f9->blocksize; x += sizeof(LTC_FAST_TYPE)) {
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6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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49 *(LTC_FAST_TYPE_PTR_CAST(&(f9->ACC[x]))) ^= *(LTC_FAST_TYPE_PTR_CAST(&(f9->IV[x])));
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50 }
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51 in += f9->blocksize;
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52 inlen -= f9->blocksize;
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53 }
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6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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54 }
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55 #endif
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56
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57 while (inlen) {
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6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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58 if (f9->buflen == f9->blocksize) {
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59 cipher_descriptor[f9->cipher].ecb_encrypt(f9->IV, f9->IV, &f9->key);
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60 for (x = 0; x < f9->blocksize; x++) {
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61 f9->ACC[x] ^= f9->IV[x];
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62 }
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63 f9->buflen = 0;
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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64 }
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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65 f9->IV[f9->buflen++] ^= *in++;
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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66 --inlen;
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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67 }
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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68 return CRYPT_OK;
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69 }
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70
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71 #endif
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72
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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73 /* ref: $Format:%D$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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74 /* git commit: $Format:%H$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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75 /* commit time: $Format:%ai$ */
382
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76