Mercurial > dropbear
annotate libtomcrypt/src/pk/dsa/dsa_generate_key.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> |
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| date | Tue, 25 Jan 2022 17:32:20 +0800 |
| parents | 6dba84798cd5 |
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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 |
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11 /** |
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12 @file dsa_make_key.c |
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13 DSA implementation, generate a DSA key |
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14 */ |
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15 |
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16 #ifdef LTC_MDSA |
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17 |
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18 /** |
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19 Create a DSA key |
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20 @param prng An active PRNG state |
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21 @param wprng The index of the PRNG desired |
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22 @param key [in/out] Where to store the created key |
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23 @return CRYPT_OK if successful. |
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24 */ |
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25 int dsa_generate_key(prng_state *prng, int wprng, dsa_key *key) |
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26 { |
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27 int err; |
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28 |
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29 LTC_ARGCHK(key != NULL); |
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30 LTC_ARGCHK(ltc_mp.name != NULL); |
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31 |
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32 /* so now we have our DH structure, generator g, order q, modulus p |
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33 Now we need a random exponent [mod q] and it's power g^x mod p |
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34 */ |
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35 /* private key x should be from range: 1 <= x <= q-1 (see FIPS 186-4 B.1.2) */ |
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36 if ((err = rand_bn_upto(key->x, key->q, prng, wprng)) != CRYPT_OK) { return err; } |
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37 if ((err = mp_exptmod(key->g, key->x, key->p, key->y)) != CRYPT_OK) { return err; } |
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38 key->type = PK_PRIVATE; |
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39 |
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40 return CRYPT_OK; |
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41 } |
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42 |
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43 #endif |
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44 |
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45 /* ref: $Format:%D$ */ |
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46 /* git commit: $Format:%H$ */ |
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47 /* commit time: $Format:%ai$ */ |