Mercurial > dropbear

annotate libtomcrypt/src/mac/omac/omac_memory_multi.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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rev   line source
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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 #include <stdarg.h>
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11
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6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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12 /**
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13 @file omac_memory_multi.c
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6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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14 OMAC1 support, process multiple blocks of memory, Tom St Denis
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15 */
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16
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17 #ifdef LTC_OMAC
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18
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19 /**
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6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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20 OMAC multiple blocks of memory
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21 @param cipher The index of the desired cipher
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22 @param key The secret key
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23 @param keylen The length of the secret key (octets)
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24 @param out [out] The destination of the authentication tag
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25 @param outlen [in/out] The max size and resulting size of the authentication tag (octets)
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6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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26 @param in The data to send through OMAC
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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27 @param inlen The length of the data to send through OMAC (octets)
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28 @param ... tuples of (data,len) pairs to OMAC, terminated with a (NULL,x) (x=don't care)
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29 @return CRYPT_OK if successful
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30 */
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6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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31 int omac_memory_multi(int cipher,
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32 const unsigned char *key, unsigned long keylen,
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33 unsigned char *out, unsigned long *outlen,
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34 const unsigned char *in, unsigned long inlen, ...)
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35 {
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36 int err;
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37 omac_state *omac;
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38 va_list args;
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39 const unsigned char *curptr;
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40 unsigned long curlen;
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41
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42 LTC_ARGCHK(key != NULL);
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43 LTC_ARGCHK(in != NULL);
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44 LTC_ARGCHK(out != NULL);
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45 LTC_ARGCHK(outlen != NULL);
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46
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47 /* allocate ram for omac state */
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48 omac = XMALLOC(sizeof(omac_state));
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49 if (omac == NULL) {
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50 return CRYPT_MEM;
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51 }
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52
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53 /* omac process the message */
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54 if ((err = omac_init(omac, cipher, key, keylen)) != CRYPT_OK) {
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55 goto LBL_ERR;
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56 }
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57 va_start(args, inlen);
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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58 curptr = in;
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59 curlen = inlen;
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60 for (;;) {
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61 /* process buf */
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62 if ((err = omac_process(omac, curptr, curlen)) != CRYPT_OK) {
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63 goto LBL_ERR;
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64 }
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65 /* step to next */
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66 curptr = va_arg(args, const unsigned char*);
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67 if (curptr == NULL) {
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68 break;
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69 }
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70 curlen = va_arg(args, unsigned long);
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71 }
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72 if ((err = omac_done(omac, out, outlen)) != CRYPT_OK) {
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73 goto LBL_ERR;
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74 }
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75 LBL_ERR:
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76 #ifdef LTC_CLEAN_STACK
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77 zeromem(omac, sizeof(omac_state));
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78 #endif
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79 XFREE(omac);
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80 va_end(args);
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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81 return err;
285
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82 }
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83
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84 #endif
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85
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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86 /* ref: $Format:%D$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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87 /* git commit: $Format:%H$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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88 /* commit time: $Format:%ai$ */