Line | Source | Count |
1 | | - |
2 | | - |
3 | | - |
4 | | - |
5 | | - |
6 | | - |
7 | | - |
8 | | - |
9 | | - |
10 | | - |
11 | | - |
12 | | - |
13 | | - |
14 | | - |
15 | | - |
16 | | - |
17 | | - |
18 | | - |
19 | | - |
20 | | - |
21 | | - |
22 | | - |
23 | | - |
24 | | - |
25 | | - |
26 | | - |
27 | | - |
28 | #include "includes.h" | - |
29 | | - |
30 | #include <sys/types.h> | - |
31 | | - |
32 | #include <stdio.h> | - |
33 | #include <string.h> | - |
34 | #include <signal.h> | - |
35 | | - |
36 | #include "sshkey.h" | - |
37 | #include "cipher.h" | - |
38 | #include "kex.h" | - |
39 | #include "log.h" | - |
40 | #include "packet.h" | - |
41 | #include "ssh2.h" | - |
42 | #include "sshbuf.h" | - |
43 | #include "digest.h" | - |
44 | #include "ssherr.h" | - |
45 | | - |
46 | static int | - |
47 | input_kex_c25519_reply(int type, u_int32_t seq, struct ssh *ssh); | - |
48 | | - |
49 | int | - |
50 | kexc25519_client(struct ssh *ssh) | - |
51 | { | - |
52 | struct kex *kex = ssh->kex; | - |
53 | int r; | - |
54 | | - |
55 | kexc25519_keygen(kex->c25519_client_key, kex->c25519_client_pubkey); | - |
56 | #ifdef DEBUG_KEXECDH | - |
57 | dump_digest("client private key:", kex->c25519_client_key, | - |
58 | sizeof(kex->c25519_client_key)); | - |
59 | #endif | - |
60 | if ((r = sshpkt_start(ssh, SSH2_MSG_KEX_ECDH_INIT)) != 0 ||TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
61 | (r = sshpkt_put_string(ssh, kex->c25519_client_pubkey,TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
62 | sizeof(kex->c25519_client_pubkey))) != 0 ||TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
63 | (r = sshpkt_send(ssh)) != 0)TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
64 | return r; never executed: return r; | 0 |
65 | | - |
66 | debug("expecting SSH2_MSG_KEX_ECDH_REPLY"); | - |
67 | ssh_dispatch_set(ssh, SSH2_MSG_KEX_ECDH_REPLY, &input_kex_c25519_reply); | - |
68 | return 0;executed 20 times by 1 test: return 0; | 20 |
69 | } | - |
70 | | - |
71 | static int | - |
72 | input_kex_c25519_reply(int type, u_int32_t seq, struct ssh *ssh) | - |
73 | { | - |
74 | struct kex *kex = ssh->kex; | - |
75 | struct sshkey *server_host_key = NULL; | - |
76 | struct sshbuf *shared_secret = NULL; | - |
77 | u_char *server_pubkey = NULL; | - |
78 | u_char *server_host_key_blob = NULL, *signature = NULL; | - |
79 | u_char hash[SSH_DIGEST_MAX_LENGTH]; | - |
80 | size_t slen, pklen, sbloblen, hashlen; | - |
81 | int r; | - |
82 | | - |
83 | if (kex->verify_host_key == NULL) {TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
84 | r = SSH_ERR_INVALID_ARGUMENT; | - |
85 | goto out; never executed: goto out; | 0 |
86 | } | - |
87 | | - |
88 | | - |
89 | if ((r = sshpkt_get_string(ssh, &server_host_key_blob,TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
90 | &sbloblen)) != 0 ||TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
91 | (r = sshkey_from_blob(server_host_key_blob, sbloblen,TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
92 | &server_host_key)) != 0)TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
93 | goto out; never executed: goto out; | 0 |
94 | if (server_host_key->type != kex->hostkey_type ||TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
95 | (kex->hostkey_type == KEY_ECDSA &&TRUE | evaluated 5 times by 1 test | FALSE | evaluated 15 times by 1 test |
| 5-15 |
96 | server_host_key->ecdsa_nid != kex->hostkey_nid)) {TRUE | never evaluated | FALSE | evaluated 5 times by 1 test |
| 0-5 |
97 | r = SSH_ERR_KEY_TYPE_MISMATCH; | - |
98 | goto out; never executed: goto out; | 0 |
99 | } | - |
100 | if (kex->verify_host_key(server_host_key, ssh) == -1) {TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
101 | r = SSH_ERR_SIGNATURE_INVALID; | - |
102 | goto out; never executed: goto out; | 0 |
103 | } | - |
104 | | - |
105 | | - |
106 | | - |
107 | if ((r = sshpkt_get_string(ssh, &server_pubkey, &pklen)) != 0 ||TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
108 | (r = sshpkt_get_string(ssh, &signature, &slen)) != 0 ||TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
109 | (r = sshpkt_get_end(ssh)) != 0)TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
110 | goto out; never executed: goto out; | 0 |
111 | if (pklen != CURVE25519_SIZE) {TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
112 | r = SSH_ERR_SIGNATURE_INVALID; | - |
113 | goto out; never executed: goto out; | 0 |
114 | } | - |
115 | | - |
116 | #ifdef DEBUG_KEXECDH | - |
117 | dump_digest("server public key:", server_pubkey, CURVE25519_SIZE); | - |
118 | #endif | - |
119 | | - |
120 | if ((shared_secret = sshbuf_new()) == NULL) {TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
121 | r = SSH_ERR_ALLOC_FAIL; | - |
122 | goto out; never executed: goto out; | 0 |
123 | } | - |
124 | if ((r = kexc25519_shared_key(kex->c25519_client_key, server_pubkey,TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
125 | shared_secret)) < 0)TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
126 | goto out; never executed: goto out; | 0 |
127 | | - |
128 | | - |
129 | hashlen = sizeof(hash); | - |
130 | if ((r = kex_c25519_hash(TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
131 | kex->hash_alg,TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
132 | kex->client_version_string,TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
133 | kex->server_version_string,TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
134 | sshbuf_ptr(kex->my), sshbuf_len(kex->my),TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
135 | sshbuf_ptr(kex->peer), sshbuf_len(kex->peer),TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
136 | server_host_key_blob, sbloblen,TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
137 | kex->c25519_client_pubkey,TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
138 | server_pubkey,TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
139 | sshbuf_ptr(shared_secret), sshbuf_len(shared_secret),TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
140 | hash, &hashlen)) < 0)TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
141 | goto out; never executed: goto out; | 0 |
142 | | - |
143 | if ((r = sshkey_verify(server_host_key, signature, slen, hash, hashlen,TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
144 | kex->hostkey_alg, ssh->compat)) != 0)TRUE | never evaluated | FALSE | evaluated 20 times by 1 test |
| 0-20 |
145 | goto out; never executed: goto out; | 0 |
146 | | - |
147 | | - |
148 | if (kex->session_id == NULL) {TRUE | evaluated 4 times by 1 test | FALSE | evaluated 16 times by 1 test |
| 4-16 |
149 | kex->session_id_len = hashlen; | - |
150 | kex->session_id = malloc(kex->session_id_len); | - |
151 | if (kex->session_id == NULL) {TRUE | never evaluated | FALSE | evaluated 4 times by 1 test |
| 0-4 |
152 | r = SSH_ERR_ALLOC_FAIL; | - |
153 | goto out; never executed: goto out; | 0 |
154 | } | - |
155 | memcpy(kex->session_id, hash, kex->session_id_len); | - |
156 | }executed 4 times by 1 test: end of block | 4 |
157 | | - |
158 | if ((r = kex_derive_keys(ssh, hash, hashlen, shared_secret)) == 0)TRUE | evaluated 20 times by 1 test | FALSE | never evaluated |
| 0-20 |
159 | r = kex_send_newkeys(ssh);executed 20 times by 1 test: r = kex_send_newkeys(ssh); | 20 |
160 | out:code before this statement executed 20 times by 1 test: out: | 20 |
161 | explicit_bzero(hash, sizeof(hash)); | - |
162 | explicit_bzero(kex->c25519_client_key, sizeof(kex->c25519_client_key)); | - |
163 | free(server_host_key_blob); | - |
164 | free(server_pubkey); | - |
165 | free(signature); | - |
166 | sshkey_free(server_host_key); | - |
167 | sshbuf_free(shared_secret); | - |
168 | return r;executed 20 times by 1 test: return r; | 20 |
169 | } | - |
| | |