1*bc5531deSDag-Erling Smørgrav /* $OpenBSD: test_kex.c,v 1.1 2015/01/15 23:41:29 markus Exp $ */ 2*bc5531deSDag-Erling Smørgrav /* 3*bc5531deSDag-Erling Smørgrav * Regress test KEX 4*bc5531deSDag-Erling Smørgrav * 5*bc5531deSDag-Erling Smørgrav * Placed in the public domain 6*bc5531deSDag-Erling Smørgrav */ 7*bc5531deSDag-Erling Smørgrav 8*bc5531deSDag-Erling Smørgrav #include "includes.h" 9*bc5531deSDag-Erling Smørgrav 10*bc5531deSDag-Erling Smørgrav #include <sys/types.h> 11*bc5531deSDag-Erling Smørgrav #include <sys/param.h> 12*bc5531deSDag-Erling Smørgrav #include <stdio.h> 13*bc5531deSDag-Erling Smørgrav #ifdef HAVE_STDINT_H 14*bc5531deSDag-Erling Smørgrav #include <stdint.h> 15*bc5531deSDag-Erling Smørgrav #endif 16*bc5531deSDag-Erling Smørgrav #include <stdlib.h> 17*bc5531deSDag-Erling Smørgrav #include <string.h> 18*bc5531deSDag-Erling Smørgrav 19*bc5531deSDag-Erling Smørgrav #include "../test_helper/test_helper.h" 20*bc5531deSDag-Erling Smørgrav 21*bc5531deSDag-Erling Smørgrav #include "ssherr.h" 22*bc5531deSDag-Erling Smørgrav #include "ssh_api.h" 23*bc5531deSDag-Erling Smørgrav #include "sshbuf.h" 24*bc5531deSDag-Erling Smørgrav #include "packet.h" 25*bc5531deSDag-Erling Smørgrav #include "myproposal.h" 26*bc5531deSDag-Erling Smørgrav 27*bc5531deSDag-Erling Smørgrav struct ssh *active_state = NULL; /* XXX - needed for linking */ 28*bc5531deSDag-Erling Smørgrav 29*bc5531deSDag-Erling Smørgrav void kex_tests(void); 30*bc5531deSDag-Erling Smørgrav static int do_debug = 0; 31*bc5531deSDag-Erling Smørgrav 32*bc5531deSDag-Erling Smørgrav static int 33*bc5531deSDag-Erling Smørgrav do_send_and_receive(struct ssh *from, struct ssh *to) 34*bc5531deSDag-Erling Smørgrav { 35*bc5531deSDag-Erling Smørgrav u_char type; 36*bc5531deSDag-Erling Smørgrav size_t len; 37*bc5531deSDag-Erling Smørgrav const u_char *buf; 38*bc5531deSDag-Erling Smørgrav int r; 39*bc5531deSDag-Erling Smørgrav 40*bc5531deSDag-Erling Smørgrav for (;;) { 41*bc5531deSDag-Erling Smørgrav if ((r = ssh_packet_next(from, &type)) != 0) { 42*bc5531deSDag-Erling Smørgrav fprintf(stderr, "ssh_packet_next: %s\n", ssh_err(r)); 43*bc5531deSDag-Erling Smørgrav return r; 44*bc5531deSDag-Erling Smørgrav } 45*bc5531deSDag-Erling Smørgrav if (type != 0) 46*bc5531deSDag-Erling Smørgrav return 0; 47*bc5531deSDag-Erling Smørgrav buf = ssh_output_ptr(from, &len); 48*bc5531deSDag-Erling Smørgrav if (do_debug) 49*bc5531deSDag-Erling Smørgrav printf("%zu", len); 50*bc5531deSDag-Erling Smørgrav if (len == 0) 51*bc5531deSDag-Erling Smørgrav return 0; 52*bc5531deSDag-Erling Smørgrav if ((r = ssh_output_consume(from, len)) != 0 || 53*bc5531deSDag-Erling Smørgrav (r = ssh_input_append(to, buf, len)) != 0) 54*bc5531deSDag-Erling Smørgrav return r; 55*bc5531deSDag-Erling Smørgrav } 56*bc5531deSDag-Erling Smørgrav } 57*bc5531deSDag-Erling Smørgrav 58*bc5531deSDag-Erling Smørgrav static void 59*bc5531deSDag-Erling Smørgrav run_kex(struct ssh *client, struct ssh *server) 60*bc5531deSDag-Erling Smørgrav { 61*bc5531deSDag-Erling Smørgrav int r = 0; 62*bc5531deSDag-Erling Smørgrav 63*bc5531deSDag-Erling Smørgrav while (!server->kex->done || !client->kex->done) { 64*bc5531deSDag-Erling Smørgrav if (do_debug) 65*bc5531deSDag-Erling Smørgrav printf(" S:"); 66*bc5531deSDag-Erling Smørgrav if ((r = do_send_and_receive(server, client))) 67*bc5531deSDag-Erling Smørgrav break; 68*bc5531deSDag-Erling Smørgrav if (do_debug) 69*bc5531deSDag-Erling Smørgrav printf(" C:"); 70*bc5531deSDag-Erling Smørgrav if ((r = do_send_and_receive(client, server))) 71*bc5531deSDag-Erling Smørgrav break; 72*bc5531deSDag-Erling Smørgrav } 73*bc5531deSDag-Erling Smørgrav if (do_debug) 74*bc5531deSDag-Erling Smørgrav printf("done: %s\n", ssh_err(r)); 75*bc5531deSDag-Erling Smørgrav ASSERT_INT_EQ(r, 0); 76*bc5531deSDag-Erling Smørgrav ASSERT_INT_EQ(server->kex->done, 1); 77*bc5531deSDag-Erling Smørgrav ASSERT_INT_EQ(client->kex->done, 1); 78*bc5531deSDag-Erling Smørgrav } 79*bc5531deSDag-Erling Smørgrav 80*bc5531deSDag-Erling Smørgrav static void 81*bc5531deSDag-Erling Smørgrav do_kex_with_key(char *kex, int keytype, int bits) 82*bc5531deSDag-Erling Smørgrav { 83*bc5531deSDag-Erling Smørgrav struct ssh *client = NULL, *server = NULL, *server2 = NULL; 84*bc5531deSDag-Erling Smørgrav struct sshkey *private, *public; 85*bc5531deSDag-Erling Smørgrav struct sshbuf *state; 86*bc5531deSDag-Erling Smørgrav struct kex_params kex_params; 87*bc5531deSDag-Erling Smørgrav char *myproposal[PROPOSAL_MAX] = { KEX_CLIENT }; 88*bc5531deSDag-Erling Smørgrav 89*bc5531deSDag-Erling Smørgrav TEST_START("sshkey_generate"); 90*bc5531deSDag-Erling Smørgrav ASSERT_INT_EQ(sshkey_generate(keytype, bits, &private), 0); 91*bc5531deSDag-Erling Smørgrav TEST_DONE(); 92*bc5531deSDag-Erling Smørgrav 93*bc5531deSDag-Erling Smørgrav TEST_START("sshkey_from_private"); 94*bc5531deSDag-Erling Smørgrav ASSERT_INT_EQ(sshkey_from_private(private, &public), 0); 95*bc5531deSDag-Erling Smørgrav TEST_DONE(); 96*bc5531deSDag-Erling Smørgrav 97*bc5531deSDag-Erling Smørgrav TEST_START("ssh_init"); 98*bc5531deSDag-Erling Smørgrav memcpy(kex_params.proposal, myproposal, sizeof(myproposal)); 99*bc5531deSDag-Erling Smørgrav if (kex != NULL) 100*bc5531deSDag-Erling Smørgrav kex_params.proposal[PROPOSAL_KEX_ALGS] = kex; 101*bc5531deSDag-Erling Smørgrav ASSERT_INT_EQ(ssh_init(&client, 0, &kex_params), 0); 102*bc5531deSDag-Erling Smørgrav ASSERT_INT_EQ(ssh_init(&server, 1, &kex_params), 0); 103*bc5531deSDag-Erling Smørgrav ASSERT_PTR_NE(client, NULL); 104*bc5531deSDag-Erling Smørgrav ASSERT_PTR_NE(server, NULL); 105*bc5531deSDag-Erling Smørgrav TEST_DONE(); 106*bc5531deSDag-Erling Smørgrav 107*bc5531deSDag-Erling Smørgrav TEST_START("ssh_add_hostkey"); 108*bc5531deSDag-Erling Smørgrav ASSERT_INT_EQ(ssh_add_hostkey(server, private), 0); 109*bc5531deSDag-Erling Smørgrav ASSERT_INT_EQ(ssh_add_hostkey(client, public), 0); 110*bc5531deSDag-Erling Smørgrav TEST_DONE(); 111*bc5531deSDag-Erling Smørgrav 112*bc5531deSDag-Erling Smørgrav TEST_START("kex"); 113*bc5531deSDag-Erling Smørgrav run_kex(client, server); 114*bc5531deSDag-Erling Smørgrav TEST_DONE(); 115*bc5531deSDag-Erling Smørgrav 116*bc5531deSDag-Erling Smørgrav TEST_START("rekeying client"); 117*bc5531deSDag-Erling Smørgrav ASSERT_INT_EQ(kex_send_kexinit(client), 0); 118*bc5531deSDag-Erling Smørgrav run_kex(client, server); 119*bc5531deSDag-Erling Smørgrav TEST_DONE(); 120*bc5531deSDag-Erling Smørgrav 121*bc5531deSDag-Erling Smørgrav TEST_START("rekeying server"); 122*bc5531deSDag-Erling Smørgrav ASSERT_INT_EQ(kex_send_kexinit(server), 0); 123*bc5531deSDag-Erling Smørgrav run_kex(client, server); 124*bc5531deSDag-Erling Smørgrav TEST_DONE(); 125*bc5531deSDag-Erling Smørgrav 126*bc5531deSDag-Erling Smørgrav TEST_START("ssh_packet_get_state"); 127*bc5531deSDag-Erling Smørgrav state = sshbuf_new(); 128*bc5531deSDag-Erling Smørgrav ASSERT_PTR_NE(state, NULL); 129*bc5531deSDag-Erling Smørgrav ASSERT_INT_EQ(ssh_packet_get_state(server, state), 0); 130*bc5531deSDag-Erling Smørgrav ASSERT_INT_GE(sshbuf_len(state), 1); 131*bc5531deSDag-Erling Smørgrav TEST_DONE(); 132*bc5531deSDag-Erling Smørgrav 133*bc5531deSDag-Erling Smørgrav TEST_START("ssh_packet_set_state"); 134*bc5531deSDag-Erling Smørgrav server2 = NULL; 135*bc5531deSDag-Erling Smørgrav ASSERT_INT_EQ(ssh_init(&server2, 1, NULL), 0); 136*bc5531deSDag-Erling Smørgrav ASSERT_PTR_NE(server2, NULL); 137*bc5531deSDag-Erling Smørgrav ASSERT_INT_EQ(ssh_add_hostkey(server2, private), 0); 138*bc5531deSDag-Erling Smørgrav kex_free(server2->kex); /* XXX or should ssh_packet_set_state()? */ 139*bc5531deSDag-Erling Smørgrav ASSERT_INT_EQ(ssh_packet_set_state(server2, state), 0); 140*bc5531deSDag-Erling Smørgrav ASSERT_INT_EQ(sshbuf_len(state), 0); 141*bc5531deSDag-Erling Smørgrav sshbuf_free(state); 142*bc5531deSDag-Erling Smørgrav ASSERT_PTR_NE(server2->kex, NULL); 143*bc5531deSDag-Erling Smørgrav /* XXX we need to set the callbacks */ 144*bc5531deSDag-Erling Smørgrav server2->kex->kex[KEX_DH_GRP1_SHA1] = kexdh_server; 145*bc5531deSDag-Erling Smørgrav server2->kex->kex[KEX_DH_GRP14_SHA1] = kexdh_server; 146*bc5531deSDag-Erling Smørgrav server2->kex->kex[KEX_DH_GEX_SHA1] = kexgex_server; 147*bc5531deSDag-Erling Smørgrav server2->kex->kex[KEX_DH_GEX_SHA256] = kexgex_server; 148*bc5531deSDag-Erling Smørgrav #ifdef OPENSSL_HAS_ECC 149*bc5531deSDag-Erling Smørgrav server2->kex->kex[KEX_ECDH_SHA2] = kexecdh_server; 150*bc5531deSDag-Erling Smørgrav #endif 151*bc5531deSDag-Erling Smørgrav server2->kex->kex[KEX_C25519_SHA256] = kexc25519_server; 152*bc5531deSDag-Erling Smørgrav server2->kex->load_host_public_key = server->kex->load_host_public_key; 153*bc5531deSDag-Erling Smørgrav server2->kex->load_host_private_key = server->kex->load_host_private_key; 154*bc5531deSDag-Erling Smørgrav server2->kex->sign = server->kex->sign; 155*bc5531deSDag-Erling Smørgrav TEST_DONE(); 156*bc5531deSDag-Erling Smørgrav 157*bc5531deSDag-Erling Smørgrav TEST_START("rekeying server2"); 158*bc5531deSDag-Erling Smørgrav ASSERT_INT_EQ(kex_send_kexinit(server2), 0); 159*bc5531deSDag-Erling Smørgrav run_kex(client, server2); 160*bc5531deSDag-Erling Smørgrav ASSERT_INT_EQ(kex_send_kexinit(client), 0); 161*bc5531deSDag-Erling Smørgrav run_kex(client, server2); 162*bc5531deSDag-Erling Smørgrav TEST_DONE(); 163*bc5531deSDag-Erling Smørgrav 164*bc5531deSDag-Erling Smørgrav TEST_START("cleanup"); 165*bc5531deSDag-Erling Smørgrav sshkey_free(private); 166*bc5531deSDag-Erling Smørgrav sshkey_free(public); 167*bc5531deSDag-Erling Smørgrav ssh_free(client); 168*bc5531deSDag-Erling Smørgrav ssh_free(server); 169*bc5531deSDag-Erling Smørgrav ssh_free(server2); 170*bc5531deSDag-Erling Smørgrav TEST_DONE(); 171*bc5531deSDag-Erling Smørgrav } 172*bc5531deSDag-Erling Smørgrav 173*bc5531deSDag-Erling Smørgrav static void 174*bc5531deSDag-Erling Smørgrav do_kex(char *kex) 175*bc5531deSDag-Erling Smørgrav { 176*bc5531deSDag-Erling Smørgrav do_kex_with_key(kex, KEY_RSA, 2048); 177*bc5531deSDag-Erling Smørgrav do_kex_with_key(kex, KEY_DSA, 1024); 178*bc5531deSDag-Erling Smørgrav #ifdef OPENSSL_HAS_ECC 179*bc5531deSDag-Erling Smørgrav do_kex_with_key(kex, KEY_ECDSA, 256); 180*bc5531deSDag-Erling Smørgrav #endif 181*bc5531deSDag-Erling Smørgrav do_kex_with_key(kex, KEY_ED25519, 256); 182*bc5531deSDag-Erling Smørgrav } 183*bc5531deSDag-Erling Smørgrav 184*bc5531deSDag-Erling Smørgrav void 185*bc5531deSDag-Erling Smørgrav kex_tests(void) 186*bc5531deSDag-Erling Smørgrav { 187*bc5531deSDag-Erling Smørgrav do_kex("curve25519-sha256@libssh.org"); 188*bc5531deSDag-Erling Smørgrav #ifdef OPENSSL_HAS_ECC 189*bc5531deSDag-Erling Smørgrav do_kex("ecdh-sha2-nistp256"); 190*bc5531deSDag-Erling Smørgrav do_kex("ecdh-sha2-nistp384"); 191*bc5531deSDag-Erling Smørgrav do_kex("ecdh-sha2-nistp521"); 192*bc5531deSDag-Erling Smørgrav #endif 193*bc5531deSDag-Erling Smørgrav do_kex("diffie-hellman-group-exchange-sha256"); 194*bc5531deSDag-Erling Smørgrav do_kex("diffie-hellman-group-exchange-sha1"); 195*bc5531deSDag-Erling Smørgrav do_kex("diffie-hellman-group14-sha1"); 196*bc5531deSDag-Erling Smørgrav do_kex("diffie-hellman-group1-sha1"); 197*bc5531deSDag-Erling Smørgrav } 198