Mercurial > dropbear

annotate libtomcrypt/src/pk/dsa/dsa_export.c @ 1156:a8f4dade70e5

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avoid getpass when not used some systems (like android's bionic) do not provide getpass. you can disable ENABLE_CLI_PASSWORD_AUTH & ENABLE_CLI_INTERACT_AUTH to avoid its use (and rely on pubkey auth), but the link still fails because the support file calls getpass. do not define this func if both of those auth methods are not used.
author Mike Frysinger <vapier@gentoo.org>
date Wed, 21 Oct 2015 22:39:55 +0800
parents 0cbe8f6dbf9e
children f849a5ca2efc
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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 * Tom St Denis, [email protected], http://libtomcrypt.com
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10 */
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11 #include "tomcrypt.h"
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12
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13 /**
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14 @file dsa_export.c
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15 DSA implementation, export key, Tom St Denis
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16 */
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18 #ifdef MDSA
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19
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20 /**
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21 Export a DSA key to a binary packet
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22 @param out [out] Where to store the packet
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23 @param outlen [in/out] The max size and resulting size of the packet
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24 @param type The type of key to export (PK_PRIVATE or PK_PUBLIC)
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25 @param key The key to export
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26 @return CRYPT_OK if successful
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27 */
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28 int dsa_export(unsigned char *out, unsigned long *outlen, int type, dsa_key *key)
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29 {
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30 unsigned char flags[1];
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31
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32 LTC_ARGCHK(out != NULL);
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33 LTC_ARGCHK(outlen != NULL);
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34 LTC_ARGCHK(key != NULL);
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35
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36 /* can we store the static header? */
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37 if (type == PK_PRIVATE && key->type != PK_PRIVATE) {
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38 return CRYPT_PK_TYPE_MISMATCH;
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39 }
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41 if (type != PK_PUBLIC && type != PK_PRIVATE) {
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42 return CRYPT_INVALID_ARG;
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43 }
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45 flags[0] = (type != PK_PUBLIC) ? 1 : 0;
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47 if (type == PK_PRIVATE) {
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48 return der_encode_sequence_multi(out, outlen,
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49 LTC_ASN1_BIT_STRING, 1UL, flags,
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50 LTC_ASN1_INTEGER, 1UL, key->g,
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51 LTC_ASN1_INTEGER, 1UL, key->p,
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52 LTC_ASN1_INTEGER, 1UL, key->q,
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53 LTC_ASN1_INTEGER, 1UL, key->y,
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54 LTC_ASN1_INTEGER, 1UL, key->x,
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55 LTC_ASN1_EOL, 0UL, NULL);
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56 } else {
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57 return der_encode_sequence_multi(out, outlen,
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58 LTC_ASN1_BIT_STRING, 1UL, flags,
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59 LTC_ASN1_INTEGER, 1UL, key->g,
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60 LTC_ASN1_INTEGER, 1UL, key->p,
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61 LTC_ASN1_INTEGER, 1UL, key->q,
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62 LTC_ASN1_INTEGER, 1UL, key->y,
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63 LTC_ASN1_EOL, 0UL, NULL);
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64 }
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65 }
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67 #endif
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68
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69
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70 /* $Source: /cvs/libtom/libtomcrypt/src/pk/dsa/dsa_export.c,v $ */
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71 /* $Revision: 1.8 $ */
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72 /* $Date: 2006/03/31 14:15:35 $ */