Mercurial > dropbear

annotate libtomcrypt/src/pk/katja/katja_export.c @ 1599:e37f98ea4f24

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fix leak in option handling
author Matt Johnston <matt@ucc.asn.au>
date Wed, 07 Mar 2018 22:14:36 +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 #include "tomcrypt.h"
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10
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11 /**
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12 @file katja_export.c
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13 Export Katja PKCS-style keys, Tom St Denis
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14 */
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15
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16 #ifdef LTC_MKAT
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17
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18 /**
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19 This will export either an KatjaPublicKey or KatjaPrivateKey
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20 @param out [out] Destination of the packet
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21 @param outlen [in/out] The max size and resulting size of the packet
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22 @param type The type of exported key (PK_PRIVATE or PK_PUBLIC)
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23 @param key The Katja key to export
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24 @return CRYPT_OK if successful
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25 */
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26 int katja_export(unsigned char *out, unsigned long *outlen, int type, katja_key *key)
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27 {
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28 int err;
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29 unsigned long zero=0;
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30
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31 LTC_ARGCHK(out != NULL);
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32 LTC_ARGCHK(outlen != NULL);
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33 LTC_ARGCHK(key != NULL);
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34
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35 /* type valid? */
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36 if (!(key->type == PK_PRIVATE) && (type == PK_PRIVATE)) {
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37 return CRYPT_PK_INVALID_TYPE;
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38 }
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39
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40 if (type == PK_PRIVATE) {
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41 /* private key */
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42 /* output is
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43 Version, n, d, p, q, d mod (p-1), d mod (q - 1), 1/q mod p, pq
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44 */
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45 if ((err = der_encode_sequence_multi(out, outlen,
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46 LTC_ASN1_SHORT_INTEGER, 1UL, &zero,
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47 LTC_ASN1_INTEGER, 1UL, key->N,
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48 LTC_ASN1_INTEGER, 1UL, key->d,
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49 LTC_ASN1_INTEGER, 1UL, key->p,
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50 LTC_ASN1_INTEGER, 1UL, key->q,
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51 LTC_ASN1_INTEGER, 1UL, key->dP,
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52 LTC_ASN1_INTEGER, 1UL, key->dQ,
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53 LTC_ASN1_INTEGER, 1UL, key->qP,
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54 LTC_ASN1_INTEGER, 1UL, key->pq,
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55 LTC_ASN1_EOL, 0UL, NULL)) != CRYPT_OK) {
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56 return err;
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57 }
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58
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59 /* clear zero and return */
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60 return CRYPT_OK;
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61 } else {
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62 /* public key */
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63 return der_encode_sequence_multi(out, outlen,
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64 LTC_ASN1_INTEGER, 1UL, key->N,
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65 LTC_ASN1_EOL, 0UL, NULL);
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66 }
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67 }
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68
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69 #endif /* LTC_MRSA */
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70
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71 /* ref: $Format:%D$ */
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72 /* git commit: $Format:%H$ */
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73 /* commit time: $Format:%ai$ */