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a938f4cfe1
to branch 'au.asn.ucc.matt.dropbear' (head 02c413252c90e9de8e03d91e9939dde3029f5c0a) --HG-- extra : convert_revision : 52ccb0ad0587a62bc64aecb939adbb76546aac16
73 lines
2.4 KiB
C
73 lines
2.4 KiB
C
/* LibTomCrypt, modular cryptographic library -- Tom St Denis
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*
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* LibTomCrypt is a library that provides various cryptographic
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* algorithms in a highly modular and flexible manner.
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*
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* The library is free for all purposes without any express
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* guarantee it works.
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*
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* Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.com
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*/
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#include "tomcrypt.h"
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/**
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@file dsa_export.c
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DSA implementation, export key, Tom St Denis
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*/
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#ifdef MDSA
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/**
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Export a DSA key to a binary packet
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@param out [out] Where to store the packet
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@param outlen [in/out] The max size and resulting size of the packet
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@param type The type of key to export (PK_PRIVATE or PK_PUBLIC)
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@param key The key to export
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@return CRYPT_OK if successful
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*/
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int dsa_export(unsigned char *out, unsigned long *outlen, int type, dsa_key *key)
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{
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unsigned char flags[1];
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LTC_ARGCHK(out != NULL);
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LTC_ARGCHK(outlen != NULL);
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LTC_ARGCHK(key != NULL);
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/* can we store the static header? */
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if (type == PK_PRIVATE && key->type != PK_PRIVATE) {
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return CRYPT_PK_TYPE_MISMATCH;
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}
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if (type != PK_PUBLIC && type != PK_PRIVATE) {
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return CRYPT_INVALID_ARG;
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}
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flags[0] = (type != PK_PUBLIC) ? 1 : 0;
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if (type == PK_PRIVATE) {
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return der_encode_sequence_multi(out, outlen,
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LTC_ASN1_BIT_STRING, 1UL, flags,
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LTC_ASN1_INTEGER, 1UL, key->g,
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LTC_ASN1_INTEGER, 1UL, key->p,
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LTC_ASN1_INTEGER, 1UL, key->q,
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LTC_ASN1_INTEGER, 1UL, key->y,
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LTC_ASN1_INTEGER, 1UL, key->x,
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LTC_ASN1_EOL, 0UL, NULL);
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} else {
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return der_encode_sequence_multi(out, outlen,
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LTC_ASN1_BIT_STRING, 1UL, flags,
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LTC_ASN1_INTEGER, 1UL, key->g,
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LTC_ASN1_INTEGER, 1UL, key->p,
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LTC_ASN1_INTEGER, 1UL, key->q,
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LTC_ASN1_INTEGER, 1UL, key->y,
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LTC_ASN1_EOL, 0UL, NULL);
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}
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}
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#endif
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/* $Source: /cvs/libtom/libtomcrypt/src/pk/dsa/dsa_export.c,v $ */
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/* $Revision: 1.8 $ */
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/* $Date: 2006/03/31 14:15:35 $ */
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