Mercurial > dropbear

annotate libtomcrypt/src/pk/katja/katja_import.c @ 1861:2b3a8026a6ce

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Add re-exec for server This allows ASLR to re-randomize the address space for every connection, preventing some vulnerabilities from being exploitable by repeated probing. Overhead (memory and time) is yet to be confirmed. At present this is only enabled on Linux. Other BSD platforms with fexecve() would probably also work though have not been tested.
author Matt Johnston <matt@ucc.asn.au>
date Sun, 30 Jan 2022 10:14:56 +0800
parents 6dba84798cd5
children
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382
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diff changeset
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 katja_import.c
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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13 Import a PKCS-style Katja key, Tom St Denis
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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14 */
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15
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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16 #ifdef LTC_MKAT
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17
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18 /**
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6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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19 Import an KatjaPublicKey or KatjaPrivateKey [two-prime only, only support >= 1024-bit keys, defined in PKCS #1 v2.1]
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20 @param in The packet to import from
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21 @param inlen It's length (octets)
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22 @param key [out] Destination for newly imported key
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23 @return CRYPT_OK if successful, upon error allocated memory is freed
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24 */
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25 int katja_import(const unsigned char *in, unsigned long inlen, katja_key *key)
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26 {
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27 int err;
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28 void *zero;
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29
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30 LTC_ARGCHK(in != NULL);
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31 LTC_ARGCHK(key != NULL);
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32 LTC_ARGCHK(ltc_mp.name != NULL);
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33
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34 /* init key */
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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35 if ((err = mp_init_multi(&zero, &key->d, &key->N, &key->dQ,
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36 &key->dP, &key->qP, &key->p, &key->q, &key->pq, NULL)) != CRYPT_OK) {
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37 return err;
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38 }
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39
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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40 if ((err = der_decode_sequence_multi(in, inlen,
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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41 LTC_ASN1_INTEGER, 1UL, key->N,
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42 LTC_ASN1_EOL, 0UL, NULL)) != CRYPT_OK) {
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43 goto LBL_ERR;
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44 }
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45
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46 if (mp_cmp_d(key->N, 0) == LTC_MP_EQ) {
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47 /* it's a private key */
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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48 if ((err = der_decode_sequence_multi(in, inlen,
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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49 LTC_ASN1_INTEGER, 1UL, zero,
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50 LTC_ASN1_INTEGER, 1UL, key->N,
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51 LTC_ASN1_INTEGER, 1UL, key->d,
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52 LTC_ASN1_INTEGER, 1UL, key->p,
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53 LTC_ASN1_INTEGER, 1UL, key->q,
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54 LTC_ASN1_INTEGER, 1UL, key->dP,
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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diff changeset
55 LTC_ASN1_INTEGER, 1UL, key->dQ,
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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56 LTC_ASN1_INTEGER, 1UL, key->qP,
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diff changeset
57 LTC_ASN1_INTEGER, 1UL, key->pq,
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58 LTC_ASN1_EOL, 0UL, NULL)) != CRYPT_OK) {
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59 goto LBL_ERR;
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60 }
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61 key->type = PK_PRIVATE;
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62 } else {
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63 /* public we have N */
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64 key->type = PK_PUBLIC;
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65 }
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66 mp_clear(zero);
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67 return CRYPT_OK;
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68 LBL_ERR:
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69 mp_clear_multi(zero, key->d, key->N, key->dQ, key->dP,
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70 key->qP, key->p, key->q, key->pq, NULL);
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71 return err;
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72 }
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73
1435
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
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74 #endif /* LTC_MRSA */
382
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75
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76
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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parents: 1435
diff changeset
77 /* ref: $Format:%D$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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diff changeset
78 /* git commit: $Format:%H$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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diff changeset
79 /* commit time: $Format:%ai$ */