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annotate libtomcrypt/src/pk/dsa/dsa_set_pqg_dsaparam.c @ 1902:4a6725ac957c

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Revert "Don't include sk keys at all in KEX list" This reverts git commit f972813ecdc7bb981d25b5a63638bd158f1c8e72. The sk algorithms need to remain in the sigalgs list so that they are included in the server-sig-algs ext-info message sent by the server. RFC8308 for server-sig-algs requires that all algorithms are listed (though OpenSSH client 8.4p1 tested doesn't require that)
author Matt Johnston <matt@ucc.asn.au>
date Thu, 24 Mar 2022 13:42:08 +0800
parents 6dba84798cd5
children
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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: $Format:%ai$ */