dropbear: ecc.c annotate

annotate ecc.c @ 1800:c584b5602bd8

Return errstring on connect failure

author	Matt Johnston <matt@ucc.asn.au>
date	Fri, 05 Mar 2021 21:13:20 +0800
parents	1051e4eea25a
children

rev	line source
756 bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	1 #include "includes.h"
bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	2 #include "ecc.h"
759 76fba0856749 More changes for KEX and ECDH. Set up hash descriptors, make ECC code work, Matt Johnston <matt@ucc.asn.au> parents: 757 diff changeset	3 #include "dbutil.h"
76fba0856749 More changes for KEX and ECDH. Set up hash descriptors, make ECC code work, Matt Johnston <matt@ucc.asn.au> parents: 757 diff changeset	4 #include "bignum.h"
756 bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	5
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1058 diff changeset	6 #if DROPBEAR_ECC
755 b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	7
852 7540c0822374 Various cleanups and fixes for warnings Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	8 /* .dp members are filled out by dropbear_ecc_fill_dp() at startup */
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1058 diff changeset	9 #if DROPBEAR_ECC_256
767 e465ed10c51d Be safer with how we handle ltc_ecc_sets[] (particularly with Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	10 struct dropbear_ecc_curve ecc_curve_nistp256 = {
855 04ede40a529a - Some fixes for old compilers like tru64 v4 from Daniel Richard G. Matt Johnston <matt@ucc.asn.au> parents: 852 diff changeset	11 32, /* .ltc_size */
04ede40a529a - Some fixes for old compilers like tru64 v4 from Daniel Richard G. Matt Johnston <matt@ucc.asn.au> parents: 852 diff changeset	12 NULL, /* .dp */
04ede40a529a - Some fixes for old compilers like tru64 v4 from Daniel Richard G. Matt Johnston <matt@ucc.asn.au> parents: 852 diff changeset	13 &sha256_desc, /* .hash_desc */
04ede40a529a - Some fixes for old compilers like tru64 v4 from Daniel Richard G. Matt Johnston <matt@ucc.asn.au> parents: 852 diff changeset	14 "nistp256" /* .name */
756 bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	15 };
bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	16 #endif
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1058 diff changeset	17 #if DROPBEAR_ECC_384
767 e465ed10c51d Be safer with how we handle ltc_ecc_sets[] (particularly with Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	18 struct dropbear_ecc_curve ecc_curve_nistp384 = {
855 04ede40a529a - Some fixes for old compilers like tru64 v4 from Daniel Richard G. Matt Johnston <matt@ucc.asn.au> parents: 852 diff changeset	19 48, /* .ltc_size */
04ede40a529a - Some fixes for old compilers like tru64 v4 from Daniel Richard G. Matt Johnston <matt@ucc.asn.au> parents: 852 diff changeset	20 NULL, /* .dp */
04ede40a529a - Some fixes for old compilers like tru64 v4 from Daniel Richard G. Matt Johnston <matt@ucc.asn.au> parents: 852 diff changeset	21 &sha384_desc, /* .hash_desc */
04ede40a529a - Some fixes for old compilers like tru64 v4 from Daniel Richard G. Matt Johnston <matt@ucc.asn.au> parents: 852 diff changeset	22 "nistp384" /* .name */
756 bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	23 };
bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	24 #endif
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1058 diff changeset	25 #if DROPBEAR_ECC_521
767 e465ed10c51d Be safer with how we handle ltc_ecc_sets[] (particularly with Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	26 struct dropbear_ecc_curve ecc_curve_nistp521 = {
855 04ede40a529a - Some fixes for old compilers like tru64 v4 from Daniel Richard G. Matt Johnston <matt@ucc.asn.au> parents: 852 diff changeset	27 66, /* .ltc_size */
04ede40a529a - Some fixes for old compilers like tru64 v4 from Daniel Richard G. Matt Johnston <matt@ucc.asn.au> parents: 852 diff changeset	28 NULL, /* .dp */
04ede40a529a - Some fixes for old compilers like tru64 v4 from Daniel Richard G. Matt Johnston <matt@ucc.asn.au> parents: 852 diff changeset	29 &sha512_desc, /* .hash_desc */
04ede40a529a - Some fixes for old compilers like tru64 v4 from Daniel Richard G. Matt Johnston <matt@ucc.asn.au> parents: 852 diff changeset	30 "nistp521" /* .name */
756 bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	31 };
bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	32 #endif
bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	33
767 e465ed10c51d Be safer with how we handle ltc_ecc_sets[] (particularly with Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	34 struct dropbear_ecc_curve *dropbear_ecc_curves[] = {
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1058 diff changeset	35 #if DROPBEAR_ECC_256
767 e465ed10c51d Be safer with how we handle ltc_ecc_sets[] (particularly with Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	36 &ecc_curve_nistp256,
e465ed10c51d Be safer with how we handle ltc_ecc_sets[] (particularly with Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	37 #endif
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1058 diff changeset	38 #if DROPBEAR_ECC_384
767 e465ed10c51d Be safer with how we handle ltc_ecc_sets[] (particularly with Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	39 &ecc_curve_nistp384,
e465ed10c51d Be safer with how we handle ltc_ecc_sets[] (particularly with Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	40 #endif
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1058 diff changeset	41 #if DROPBEAR_ECC_521
767 e465ed10c51d Be safer with how we handle ltc_ecc_sets[] (particularly with Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	42 &ecc_curve_nistp521,
e465ed10c51d Be safer with how we handle ltc_ecc_sets[] (particularly with Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	43 #endif
e465ed10c51d Be safer with how we handle ltc_ecc_sets[] (particularly with Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	44 NULL
e465ed10c51d Be safer with how we handle ltc_ecc_sets[] (particularly with Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	45 };
e465ed10c51d Be safer with how we handle ltc_ecc_sets[] (particularly with Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	46
e465ed10c51d Be safer with how we handle ltc_ecc_sets[] (particularly with Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	47 void dropbear_ecc_fill_dp() {
e465ed10c51d Be safer with how we handle ltc_ecc_sets[] (particularly with Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	48 struct dropbear_ecc_curve **curve;
852 7540c0822374 Various cleanups and fixes for warnings Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	49 /* libtomcrypt guarantees they're ordered by size */
767 e465ed10c51d Be safer with how we handle ltc_ecc_sets[] (particularly with Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	50 const ltc_ecc_set_type *dp = ltc_ecc_sets;
e465ed10c51d Be safer with how we handle ltc_ecc_sets[] (particularly with Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	51 for (curve = dropbear_ecc_curves; *curve; curve++) {
e465ed10c51d Be safer with how we handle ltc_ecc_sets[] (particularly with Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	52 for (;dp->size > 0; dp++) {
e465ed10c51d Be safer with how we handle ltc_ecc_sets[] (particularly with Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	53 if (dp->size == (*curve)->ltc_size) {
e465ed10c51d Be safer with how we handle ltc_ecc_sets[] (particularly with Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	54 (*curve)->dp = dp;
e465ed10c51d Be safer with how we handle ltc_ecc_sets[] (particularly with Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	55 break;
e465ed10c51d Be safer with how we handle ltc_ecc_sets[] (particularly with Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	56 }
e465ed10c51d Be safer with how we handle ltc_ecc_sets[] (particularly with Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	57 }
e465ed10c51d Be safer with how we handle ltc_ecc_sets[] (particularly with Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	58 if (!(*curve)->dp) {
e465ed10c51d Be safer with how we handle ltc_ecc_sets[] (particularly with Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	59 dropbear_exit("Missing ECC params %s", (*curve)->name);
e465ed10c51d Be safer with how we handle ltc_ecc_sets[] (particularly with Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	60 }
e465ed10c51d Be safer with how we handle ltc_ecc_sets[] (particularly with Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	61 }
e465ed10c51d Be safer with how we handle ltc_ecc_sets[] (particularly with Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	62 }
e465ed10c51d Be safer with how we handle ltc_ecc_sets[] (particularly with Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	63
793 70625eed40c9 A bit of work on ecdsa for host/auth keys Matt Johnston <matt@ucc.asn.au> parents: 768 diff changeset	64 struct dropbear_ecc_curve* curve_for_dp(const ltc_ecc_set_type *dp) {
70625eed40c9 A bit of work on ecdsa for host/auth keys Matt Johnston <matt@ucc.asn.au> parents: 768 diff changeset	65 struct dropbear_ecc_curve **curve = NULL;
70625eed40c9 A bit of work on ecdsa for host/auth keys Matt Johnston <matt@ucc.asn.au> parents: 768 diff changeset	66 for (curve = dropbear_ecc_curves; *curve; curve++) {
70625eed40c9 A bit of work on ecdsa for host/auth keys Matt Johnston <matt@ucc.asn.au> parents: 768 diff changeset	67 if ((*curve)->dp == dp) {
70625eed40c9 A bit of work on ecdsa for host/auth keys Matt Johnston <matt@ucc.asn.au> parents: 768 diff changeset	68 break;
70625eed40c9 A bit of work on ecdsa for host/auth keys Matt Johnston <matt@ucc.asn.au> parents: 768 diff changeset	69 }
70625eed40c9 A bit of work on ecdsa for host/auth keys Matt Johnston <matt@ucc.asn.au> parents: 768 diff changeset	70 }
70625eed40c9 A bit of work on ecdsa for host/auth keys Matt Johnston <matt@ucc.asn.au> parents: 768 diff changeset	71 assert(*curve);
70625eed40c9 A bit of work on ecdsa for host/auth keys Matt Johnston <matt@ucc.asn.au> parents: 768 diff changeset	72 return *curve;
70625eed40c9 A bit of work on ecdsa for host/auth keys Matt Johnston <matt@ucc.asn.au> parents: 768 diff changeset	73 }
70625eed40c9 A bit of work on ecdsa for host/auth keys Matt Johnston <matt@ucc.asn.au> parents: 768 diff changeset	74
767 e465ed10c51d Be safer with how we handle ltc_ecc_sets[] (particularly with Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	75 ecc_key * new_ecc_key(void) {
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	76 ecc_key key = m_malloc(sizeof(key));
864 30ab30e46452 Fix some warnings Matt Johnston <matt@ucc.asn.au> parents: 857 diff changeset	77 m_mp_alloc_init_multi((mp_int)&key->pubkey.x, (mp_int)&key->pubkey.y,
30ab30e46452 Fix some warnings Matt Johnston <matt@ucc.asn.au> parents: 857 diff changeset	78 (mp_int)&key->pubkey.z, (mp_int)&key->k, NULL);
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	79 return key;
759 76fba0856749 More changes for KEX and ECDH. Set up hash descriptors, make ECC code work, Matt Johnston <matt@ucc.asn.au> parents: 757 diff changeset	80 }
756 bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	81
857 c19acba28590 use oldstyle comments Matt Johnston <matt@ucc.asn.au> parents: 855 diff changeset	82 /* Copied from libtomcrypt ecc_import.c (version there is static), modified
c19acba28590 use oldstyle comments Matt Johnston <matt@ucc.asn.au> parents: 855 diff changeset	83 for different mp_int pointer without LTC_SOURCE */
1459 06d52bcb8094 Pointer parameter could be declared as pointing to const Francois Perrad <francois.perrad@gadz.org> parents: 1295 diff changeset	84 static int ecc_is_point(const ecc_key *key)
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	85 {
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	86 mp_int prime, b, t1, t2;
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	87 int err;
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	88
805 724c3e0c8734 Add m_mp_alloc_init_multi() helper Matt Johnston <matt@ucc.asn.au> parents: 793 diff changeset	89 m_mp_alloc_init_multi(&prime, &b, &t1, &t2, NULL);
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	90
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	91 /* load prime and b */
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	92 if ((err = mp_read_radix(prime, key->dp->prime, 16)) != CRYPT_OK) { goto error; }
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	93 if ((err = mp_read_radix(b, key->dp->B, 16)) != CRYPT_OK) { goto error; }
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	94
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	95 /* compute y^2 */
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	96 if ((err = mp_sqr(key->pubkey.y, t1)) != CRYPT_OK) { goto error; }
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	97
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	98 /* compute x^3 */
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	99 if ((err = mp_sqr(key->pubkey.x, t2)) != CRYPT_OK) { goto error; }
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	100 if ((err = mp_mod(t2, prime, t2)) != CRYPT_OK) { goto error; }
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	101 if ((err = mp_mul(key->pubkey.x, t2, t2)) != CRYPT_OK) { goto error; }
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	102
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	103 /* compute y^2 - x^3 */
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	104 if ((err = mp_sub(t1, t2, t1)) != CRYPT_OK) { goto error; }
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	105
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	106 /* compute y^2 - x^3 + 3x */
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	107 if ((err = mp_add(t1, key->pubkey.x, t1)) != CRYPT_OK) { goto error; }
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	108 if ((err = mp_add(t1, key->pubkey.x, t1)) != CRYPT_OK) { goto error; }
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	109 if ((err = mp_add(t1, key->pubkey.x, t1)) != CRYPT_OK) { goto error; }
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	110 if ((err = mp_mod(t1, prime, t1)) != CRYPT_OK) { goto error; }
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	111 while (mp_cmp_d(t1, 0) == LTC_MP_LT) {
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	112 if ((err = mp_add(t1, prime, t1)) != CRYPT_OK) { goto error; }
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	113 }
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	114 while (mp_cmp(t1, prime) != LTC_MP_LT) {
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	115 if ((err = mp_sub(t1, prime, t1)) != CRYPT_OK) { goto error; }
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	116 }
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	117
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	118 /* compare to b */
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	119 if (mp_cmp(t1, b) != LTC_MP_EQ) {
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	120 err = CRYPT_INVALID_PACKET;
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	121 } else {
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	122 err = CRYPT_OK;
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	123 }
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	124
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	125 error:
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	126 mp_clear_multi(prime, b, t1, t2, NULL);
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	127 m_free(prime);
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	128 m_free(b);
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	129 m_free(t1);
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	130 m_free(t2);
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	131 return err;
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	132 }
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	133
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	134 /* For the "ephemeral public key octet string" in ECDH (rfc5656 section 4) */
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	135 void buf_put_ecc_raw_pubkey_string(buffer buf, ecc_key key) {
759 76fba0856749 More changes for KEX and ECDH. Set up hash descriptors, make ECC code work, Matt Johnston <matt@ucc.asn.au> parents: 757 diff changeset	136 unsigned long len = key->dp->size*2 + 1;
855 04ede40a529a - Some fixes for old compilers like tru64 v4 from Daniel Richard G. Matt Johnston <matt@ucc.asn.au> parents: 852 diff changeset	137 int err;
759 76fba0856749 More changes for KEX and ECDH. Set up hash descriptors, make ECC code work, Matt Johnston <matt@ucc.asn.au> parents: 757 diff changeset	138 buf_putint(buf, len);
855 04ede40a529a - Some fixes for old compilers like tru64 v4 from Daniel Richard G. Matt Johnston <matt@ucc.asn.au> parents: 852 diff changeset	139 err = ecc_ansi_x963_export(key, buf_getwriteptr(buf, len), &len);
755 b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	140 if (err != CRYPT_OK) {
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	141 dropbear_exit("ECC error");
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	142 }
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	143 buf_incrwritepos(buf, len);
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	144 }
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	145
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	146 /* For the "ephemeral public key octet string" in ECDH (rfc5656 section 4) */
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	147 ecc_key * buf_get_ecc_raw_pubkey(buffer buf, const struct dropbear_ecc_curve curve) {
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	148 ecc_key *key = NULL;
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	149 int ret = DROPBEAR_FAILURE;
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	150 const unsigned int size = curve->dp->size;
768 6e6ce39da2fc A bit of debugging output Matt Johnston <matt@ucc.asn.au> parents: 767 diff changeset	151 unsigned char first;
6e6ce39da2fc A bit of debugging output Matt Johnston <matt@ucc.asn.au> parents: 767 diff changeset	152
6e6ce39da2fc A bit of debugging output Matt Johnston <matt@ucc.asn.au> parents: 767 diff changeset	153 TRACE(("enter buf_get_ecc_raw_pubkey"))
6e6ce39da2fc A bit of debugging output Matt Johnston <matt@ucc.asn.au> parents: 767 diff changeset	154
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	155 buf_setpos(buf, 0);
768 6e6ce39da2fc A bit of debugging output Matt Johnston <matt@ucc.asn.au> parents: 767 diff changeset	156 first = buf_getbyte(buf);
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	157 if (first == 2 \|\| first == 3) {
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	158 dropbear_log(LOG_WARNING, "Dropbear doesn't support ECC point compression");
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	159 return NULL;
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	160 }
768 6e6ce39da2fc A bit of debugging output Matt Johnston <matt@ucc.asn.au> parents: 767 diff changeset	161 if (first != 4 \|\| buf->len != 1+2*size) {
6e6ce39da2fc A bit of debugging output Matt Johnston <matt@ucc.asn.au> parents: 767 diff changeset	162 TRACE(("leave, wrong size"))
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	163 return NULL;
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	164 }
759 76fba0856749 More changes for KEX and ECDH. Set up hash descriptors, make ECC code work, Matt Johnston <matt@ucc.asn.au> parents: 757 diff changeset	165
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	166 key = new_ecc_key();
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	167 key->dp = curve->dp;
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	168
1692 1051e4eea25a Update LibTomMath to 1.2.0 (#84) Steffen Jaeckel <s@jaeckel.eu> parents: 1515 diff changeset	169 if (mp_from_ubin(key->pubkey.x, buf_getptr(buf, size), size) != MP_OKAY) {
768 6e6ce39da2fc A bit of debugging output Matt Johnston <matt@ucc.asn.au> parents: 767 diff changeset	170 TRACE(("failed to read x"))
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	171 goto out;
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	172 }
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	173 buf_incrpos(buf, size);
759 76fba0856749 More changes for KEX and ECDH. Set up hash descriptors, make ECC code work, Matt Johnston <matt@ucc.asn.au> parents: 757 diff changeset	174
1692 1051e4eea25a Update LibTomMath to 1.2.0 (#84) Steffen Jaeckel <s@jaeckel.eu> parents: 1515 diff changeset	175 if (mp_from_ubin(key->pubkey.y, buf_getptr(buf, size), size) != MP_OKAY) {
768 6e6ce39da2fc A bit of debugging output Matt Johnston <matt@ucc.asn.au> parents: 767 diff changeset	176 TRACE(("failed to read y"))
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	177 goto out;
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	178 }
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	179 buf_incrpos(buf, size);
757 230666086711 ecc key import function Matt Johnston <matt@ucc.asn.au> parents: 756 diff changeset	180
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	181 mp_set(key->pubkey.z, 1);
757 230666086711 ecc key import function Matt Johnston <matt@ucc.asn.au> parents: 756 diff changeset	182
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	183 if (ecc_is_point(key) != CRYPT_OK) {
768 6e6ce39da2fc A bit of debugging output Matt Johnston <matt@ucc.asn.au> parents: 767 diff changeset	184 TRACE(("failed, not a point"))
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	185 goto out;
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	186 }
757 230666086711 ecc key import function Matt Johnston <matt@ucc.asn.au> parents: 756 diff changeset	187
857 c19acba28590 use oldstyle comments Matt Johnston <matt@ucc.asn.au> parents: 855 diff changeset	188 /* SEC1 3.2.3.1 Check that Q != 0 */
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	189 if (mp_cmp_d(key->pubkey.x, 0) == LTC_MP_EQ) {
768 6e6ce39da2fc A bit of debugging output Matt Johnston <matt@ucc.asn.au> parents: 767 diff changeset	190 TRACE(("failed, x == 0"))
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	191 goto out;
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	192 }
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	193 if (mp_cmp_d(key->pubkey.y, 0) == LTC_MP_EQ) {
768 6e6ce39da2fc A bit of debugging output Matt Johnston <matt@ucc.asn.au> parents: 767 diff changeset	194 TRACE(("failed, y == 0"))
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	195 goto out;
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	196 }
757 230666086711 ecc key import function Matt Johnston <matt@ucc.asn.au> parents: 756 diff changeset	197
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	198 ret = DROPBEAR_SUCCESS;
757 230666086711 ecc key import function Matt Johnston <matt@ucc.asn.au> parents: 756 diff changeset	199
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	200 out:
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	201 if (ret == DROPBEAR_FAILURE) {
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	202 if (key) {
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	203 ecc_free(key);
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	204 m_free(key);
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	205 key = NULL;
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	206 }
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	207 }
757 230666086711 ecc key import function Matt Johnston <matt@ucc.asn.au> parents: 756 diff changeset	208
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	209 return key;
757 230666086711 ecc key import function Matt Johnston <matt@ucc.asn.au> parents: 756 diff changeset	210
755 b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	211 }
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	212
857 c19acba28590 use oldstyle comments Matt Johnston <matt@ucc.asn.au> parents: 855 diff changeset	213 /* a modified version of libtomcrypt's "ecc_shared_secret" to output
c19acba28590 use oldstyle comments Matt Johnston <matt@ucc.asn.au> parents: 855 diff changeset	214 a mp_int instead. */
1459 06d52bcb8094 Pointer parameter could be declared as pointing to const Francois Perrad <francois.perrad@gadz.org> parents: 1295 diff changeset	215 mp_int * dropbear_ecc_shared_secret(ecc_key public_key, const ecc_key private_key)
756 bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	216 {
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	217 ecc_point *result = NULL;
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	218 mp_int prime = NULL, shared_secret = NULL;
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	219 int err = DROPBEAR_FAILURE;
756 bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	220
bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	221 /* type valid? */
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	222 if (private_key->type != PK_PRIVATE) {
1487 b0c3b46372dc simplify error handling, check mp_copy return value Matt Johnston <matt@ucc.asn.au> parents: 1459 diff changeset	223 goto out;
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	224 }
756 bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	225
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	226 if (private_key->dp != public_key->dp) {
1487 b0c3b46372dc simplify error handling, check mp_copy return value Matt Johnston <matt@ucc.asn.au> parents: 1459 diff changeset	227 goto out;
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	228 }
756 bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	229
bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	230 /* make new point */
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	231 result = ltc_ecc_new_point();
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	232 if (result == NULL) {
1487 b0c3b46372dc simplify error handling, check mp_copy return value Matt Johnston <matt@ucc.asn.au> parents: 1459 diff changeset	233 goto out;
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	234 }
756 bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	235
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	236 prime = m_malloc(sizeof(*prime));
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	237 m_mp_init(prime);
756 bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	238
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	239 if (mp_read_radix(prime, (char *)private_key->dp->prime, 16) != CRYPT_OK) {
1487 b0c3b46372dc simplify error handling, check mp_copy return value Matt Johnston <matt@ucc.asn.au> parents: 1459 diff changeset	240 goto out;
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	241 }
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	242 if (ltc_mp.ecc_ptmul(private_key->k, &public_key->pubkey, result, prime, 1) != CRYPT_OK) {
1487 b0c3b46372dc simplify error handling, check mp_copy return value Matt Johnston <matt@ucc.asn.au> parents: 1459 diff changeset	243 goto out;
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	244 }
756 bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	245
1487 b0c3b46372dc simplify error handling, check mp_copy return value Matt Johnston <matt@ucc.asn.au> parents: 1459 diff changeset	246 shared_secret = m_malloc(sizeof(*shared_secret));
b0c3b46372dc simplify error handling, check mp_copy return value Matt Johnston <matt@ucc.asn.au> parents: 1459 diff changeset	247 m_mp_init(shared_secret);
b0c3b46372dc simplify error handling, check mp_copy return value Matt Johnston <matt@ucc.asn.au> parents: 1459 diff changeset	248 if (mp_copy(result->x, shared_secret) != CRYPT_OK) {
b0c3b46372dc simplify error handling, check mp_copy return value Matt Johnston <matt@ucc.asn.au> parents: 1459 diff changeset	249 goto out;
b0c3b46372dc simplify error handling, check mp_copy return value Matt Johnston <matt@ucc.asn.au> parents: 1459 diff changeset	250 }
b0c3b46372dc simplify error handling, check mp_copy return value Matt Johnston <matt@ucc.asn.au> parents: 1459 diff changeset	251
b0c3b46372dc simplify error handling, check mp_copy return value Matt Johnston <matt@ucc.asn.au> parents: 1459 diff changeset	252 mp_clear(prime);
b0c3b46372dc simplify error handling, check mp_copy return value Matt Johnston <matt@ucc.asn.au> parents: 1459 diff changeset	253 m_free(prime);
b0c3b46372dc simplify error handling, check mp_copy return value Matt Johnston <matt@ucc.asn.au> parents: 1459 diff changeset	254 ltc_ecc_del_point(result);
b0c3b46372dc simplify error handling, check mp_copy return value Matt Johnston <matt@ucc.asn.au> parents: 1459 diff changeset	255
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	256 err = DROPBEAR_SUCCESS;
1487 b0c3b46372dc simplify error handling, check mp_copy return value Matt Johnston <matt@ucc.asn.au> parents: 1459 diff changeset	257 out:
765 5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	258 if (err == DROPBEAR_FAILURE) {
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	259 dropbear_exit("ECC error");
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	260 }
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string() Matt Johnston <matt@ucc.asn.au> parents: 763 diff changeset	261 return shared_secret;
756 bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	262 }
755 b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	263
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	264 #endif

Mercurial > dropbear

annotate ecc.c @ 1800:c584b5602bd8