Mercurial > dropbear

annotate libtomcrypt/src/pk/ecc/ecc_export.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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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 /* Implements ECC over Z/pZ for curve y^2 = x^3 - 3x + b
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11 *
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12 * All curves taken from NIST recommendation paper of July 1999
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13 * Available at http://csrc.nist.gov/cryptval/dss.htm
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14 */
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15 #include "tomcrypt.h"
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16
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17 /**
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18 @file ecc_export.c
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19 ECC Crypto, Tom St Denis
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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20 */
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21
1435
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
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22 #if defined(LTC_MECC) && defined(LTC_DER)
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23
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24 /**
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25 Export an ECC key as a binary packet
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26 @param out [out] Destination for the key
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27 @param outlen [in/out] Max size and resulting size of the exported key
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28 @param type The type of key you want to export (PK_PRIVATE or PK_PUBLIC)
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29 @param key The key to export
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30 @return CRYPT_OK if successful
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31 */
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32 int ecc_export(unsigned char *out, unsigned long *outlen, int type, ecc_key *key)
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33 {
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34 int err;
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35 unsigned char flags[1];
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36 unsigned long key_size;
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37
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38 LTC_ARGCHK(out != NULL);
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39 LTC_ARGCHK(outlen != NULL);
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40 LTC_ARGCHK(key != NULL);
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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41
382
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42 /* type valid? */
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43 if (key->type != PK_PRIVATE && type == PK_PRIVATE) {
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44 return CRYPT_PK_TYPE_MISMATCH;
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45 }
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46
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47 if (ltc_ecc_is_valid_idx(key->idx) == 0) {
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48 return CRYPT_INVALID_ARG;
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49 }
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50
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51 /* we store the NIST byte size */
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52 key_size = key->dp->size;
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53
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54 if (type == PK_PRIVATE) {
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55 flags[0] = 1;
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56 err = der_encode_sequence_multi(out, outlen,
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57 LTC_ASN1_BIT_STRING, 1UL, flags,
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58 LTC_ASN1_SHORT_INTEGER, 1UL, &key_size,
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59 LTC_ASN1_INTEGER, 1UL, key->pubkey.x,
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60 LTC_ASN1_INTEGER, 1UL, key->pubkey.y,
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61 LTC_ASN1_INTEGER, 1UL, key->k,
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62 LTC_ASN1_EOL, 0UL, NULL);
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63 } else {
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64 flags[0] = 0;
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65 err = der_encode_sequence_multi(out, outlen,
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66 LTC_ASN1_BIT_STRING, 1UL, flags,
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67 LTC_ASN1_SHORT_INTEGER, 1UL, &key_size,
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68 LTC_ASN1_INTEGER, 1UL, key->pubkey.x,
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69 LTC_ASN1_INTEGER, 1UL, key->pubkey.y,
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70 LTC_ASN1_EOL, 0UL, NULL);
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71 }
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72
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73 return err;
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74 }
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75
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76 #endif
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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77 /* ref: $Format:%D$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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78 /* git commit: $Format:%H$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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79 /* commit time: $Format:%ai$ */
382
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80