Mercurial > dropbear

annotate libtomcrypt/src/pk/dsa/dsa_set_pqg_dsaparam.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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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 #include "tomcrypt.h"
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10
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11
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12 #ifdef LTC_MDSA
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13
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14 /**
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15 Import DSA's p, q & g from dsaparam
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16
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17 dsaparam data: openssl dsaparam -outform DER -out dsaparam.der 2048
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18
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19 @param dsaparam The DSA param DER encoded data
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20 @param dsaparamlen The length of dhparam data
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21 @param key [out] the destination for the imported key
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22 @return CRYPT_OK if successful.
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23 */
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24 int dsa_set_pqg_dsaparam(const unsigned char *dsaparam, unsigned long dsaparamlen,
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25 dsa_key *key)
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26 {
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27 int err, stat;
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28
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29 LTC_ARGCHK(dsaparam != NULL);
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30 LTC_ARGCHK(key != NULL);
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31 LTC_ARGCHK(ltc_mp.name != NULL);
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32
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33 /* init key */
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34 err = mp_init_multi(&key->p, &key->g, &key->q, &key->x, &key->y, NULL);
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35 if (err != CRYPT_OK) return err;
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36
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37 if ((err = der_decode_sequence_multi(dsaparam, dsaparamlen,
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38 LTC_ASN1_INTEGER, 1UL, key->p,
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39 LTC_ASN1_INTEGER, 1UL, key->q,
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40 LTC_ASN1_INTEGER, 1UL, key->g,
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41 LTC_ASN1_EOL, 0UL, NULL)) != CRYPT_OK) {
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42 goto LBL_ERR;
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43 }
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44
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45 key->qord = mp_unsigned_bin_size(key->q);
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46
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47 /* quick p, q, g validation, without primality testing */
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48 if ((err = dsa_int_validate_pqg(key, &stat)) != CRYPT_OK) {
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49 goto LBL_ERR;
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50 }
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51 if (stat == 0) {
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52 err = CRYPT_INVALID_PACKET;
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53 goto LBL_ERR;
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54 }
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55
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56 return CRYPT_OK;
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57
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58 LBL_ERR:
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59 dsa_free(key);
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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: $Format:%ai$ */