dropbear: libtomcrypt/src/pk/dh/dh_export

annotate libtomcrypt/src/pk/dh/dh_export_key.c @ 1638:315fcba6960e

dropbearconvert: keyimport.c: fix BER encoding of secp521r1 keys (#69) keysizes >= 128 octets will be encoded with a 3 byte header which must be accounted by the optional-header Reproduce: master:~/build/dropbear$ ./dropbearkey -t ecdsa -s 521 -f K Generating 521 bit ecdsa key, this may take a while... master:~/build/dropbear$ ./dropbearconvert d o K L Key is a ecdsa-sha2-nistp521 key Wrote key to 'L' master:~/build/dropbear$ openssl ec < L read EC key unable to load Key 139769806448384:error:0D07209B:asn1 encoding routines:ASN1_get_object:too long:crypto/asn1/asn1_lib.c:91:

author	Christian Hohnstädt <christian@hohnstaedt.de>
date	Wed, 20 Mar 2019 16:42:47 +0100
parents	6dba84798cd5
children

rev	line source
1471 6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	2 *
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	3 * LibTomCrypt is a library that provides various cryptographic
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	4 * algorithms in a highly modular and flexible manner.
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	5 *
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	6 * The library is free for all purposes without any express
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	7 * guarantee it works.
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	8 */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	9
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	10 #include "tomcrypt.h"
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	11
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	12 #ifdef LTC_MDH
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	13
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	14 /**
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	15 Binary export a DH key to a buffer
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	16 @param out [out] The destination for the key
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	17 @param outlen [in/out] The max size and resulting size of the DH key
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	18 @param type Which type of key (PK_PRIVATE or PK_PUBLIC)
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	19 @param key The key you wish to export
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	20 @return CRYPT_OK if successful
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	21 */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	22 int dh_export_key(void out, unsigned long outlen, int type, dh_key *key)
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	23 {
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	24 unsigned long len;
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	25 void *k;
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	26
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	27 LTC_ARGCHK(out != NULL);
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	28 LTC_ARGCHK(outlen != NULL);
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	29 LTC_ARGCHK(key != NULL);
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	30
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	31 k = (type == PK_PRIVATE) ? key->x : key->y;
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	32 len = mp_unsigned_bin_size(k);
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	33
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	34 if (*outlen < len) {
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	35 *outlen = len;
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	36 return CRYPT_BUFFER_OVERFLOW;
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	37 }
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	38 *outlen = len;
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	39
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	40 return mp_to_unsigned_bin(k, out);
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	41 }
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	42
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	43 #endif /* LTC_MDH */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	44
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	45 /* ref: $Format:%D$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	46 /* git commit: $Format:%H$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes Matt Johnston <matt@ucc.asn.au> parents: diff changeset	47 /* commit time: $Format:%ai$ */

Mercurial > dropbear

annotate libtomcrypt/src/pk/dh/dh_export_key.c @ 1638:315fcba6960e