annotate libtomcrypt/src/pk/asn1/der/octet/der_length_octet_string.c @ 1857:6022df862942

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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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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11 /**
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12 @file der_length_octet_string.c
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13 ASN.1 DER, get length of OCTET STRING, Tom St Denis
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14 */
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16 #ifdef LTC_DER
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17 /**
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6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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18 Gets length of DER encoding of OCTET STRING
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19 @param noctets The number of octets in the string to encode
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20 @param outlen [out] The length of the DER encoding for the given string
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21 @return CRYPT_OK if successful
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22 */
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23 int der_length_octet_string(unsigned long noctets, unsigned long *outlen)
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24 {
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25 LTC_ARGCHK(outlen != NULL);
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27 if (noctets < 128) {
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28 /* 04 LL DD DD DD ... */
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29 *outlen = 2 + noctets;
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30 } else if (noctets < 256) {
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31 /* 04 81 LL DD DD DD ... */
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32 *outlen = 3 + noctets;
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33 } else if (noctets < 65536UL) {
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34 /* 04 82 LL LL DD DD DD ... */
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35 *outlen = 4 + noctets;
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36 } else if (noctets < 16777216UL) {
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37 /* 04 83 LL LL LL DD DD DD ... */
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38 *outlen = 5 + noctets;
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39 } else {
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40 return CRYPT_INVALID_ARG;
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41 }
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43 return CRYPT_OK;
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44 }
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46 #endif
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48
1471
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49 /* ref: $Format:%D$ */
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50 /* git commit: $Format:%H$ */
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51 /* commit time: $Format:%ai$ */