Mercurial > dropbear

annotate ecc.c @ 1889:fc4c9ef61856

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Split CPPFLAGS and CFLAGS more carefully This has no change to the build, but makes it easier to try other build tools that only want CPPFLAGS
author Matt Johnston <matt@ucc.asn.au>
date Tue, 22 Mar 2022 16:17:05 +0800
parents 1051e4eea25a
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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