Mercurial > dropbear

annotate libtomcrypt/src/mac/poly1305/poly1305_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
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1471
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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 #include <stdarg.h>
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17
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18 #ifdef LTC_POLY1305
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19
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20 /**
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21 POLY1305 multiple blocks of memory to produce the authentication tag
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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 mac [out] Destination of the authentication tag
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25 @param maclen [in/out] Max size and resulting size of authentication tag
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26 @param in The data to POLY1305
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27 @param inlen The length of the data to POLY1305 (octets)
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28 @param ... tuples of (data,len) pairs to POLY1305, 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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31 int poly1305_memory_multi(const unsigned char *key, unsigned long keylen, unsigned char *mac, unsigned long *maclen, const unsigned char *in, unsigned long inlen, ...)
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32 {
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33 poly1305_state st;
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34 int err;
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35 va_list args;
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36 const unsigned char *curptr;
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37 unsigned long curlen;
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38
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39 LTC_ARGCHK(key != NULL);
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40 LTC_ARGCHK(in != NULL);
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41 LTC_ARGCHK(mac != NULL);
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42 LTC_ARGCHK(maclen != NULL);
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43
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44 va_start(args, inlen);
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45 curptr = in;
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46 curlen = inlen;
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47 if ((err = poly1305_init(&st, key, keylen)) != CRYPT_OK) { goto LBL_ERR; }
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48 for (;;) {
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49 if ((err = poly1305_process(&st, curptr, curlen)) != CRYPT_OK) { goto LBL_ERR; }
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50 curptr = va_arg(args, const unsigned char*);
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51 if (curptr == NULL) break;
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52 curlen = va_arg(args, unsigned long);
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53 }
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54 err = poly1305_done(&st, mac, maclen);
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55 LBL_ERR:
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56 #ifdef LTC_CLEAN_STACK
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57 zeromem(&st, sizeof(poly1305_state));
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58 #endif
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59 va_end(args);
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60 return err;
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61 }
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62
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63 #endif
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64
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65 /* ref: $Format:%D$ */
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66 /* git commit: $Format:%H$ */
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67 /* commit time: $Format:%ai$ */