+++ /dev/null
-/*
- * TLSv1 client - write handshake message
- * Copyright (c) 2006-2007, Jouni Malinen <j@w1.fi>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Alternatively, this software may be distributed under the terms of BSD
- * license.
- *
- * See README and COPYING for more details.
- */
-
-#include "includes.h"
-
-#include "common.h"
-#include "crypto/md5.h"
-#include "crypto/sha1.h"
-#include "crypto/tls.h"
-#include "x509v3.h"
-#include "tlsv1_common.h"
-#include "tlsv1_record.h"
-#include "tlsv1_client.h"
-#include "tlsv1_client_i.h"
-
-
-static size_t tls_client_cert_chain_der_len(struct tlsv1_client *conn)
-{
- size_t len = 0;
- struct x509_certificate *cert;
-
- if (conn->cred == NULL)
- return 0;
-
- cert = conn->cred->cert;
- while (cert) {
- len += 3 + cert->cert_len;
- if (x509_certificate_self_signed(cert))
- break;
- cert = x509_certificate_get_subject(conn->cred->trusted_certs,
- &cert->issuer);
- }
-
- return len;
-}
-
-
-u8 * tls_send_client_hello(struct tlsv1_client *conn, size_t *out_len)
-{
- u8 *hello, *end, *pos, *hs_length, *hs_start, *rhdr;
- struct os_time now;
- size_t len, i;
-
- wpa_printf(MSG_DEBUG, "TLSv1: Send ClientHello");
- *out_len = 0;
-
- os_get_time(&now);
- WPA_PUT_BE32(conn->client_random, now.sec);
- if (os_get_random(conn->client_random + 4, TLS_RANDOM_LEN - 4)) {
- wpa_printf(MSG_ERROR, "TLSv1: Could not generate "
- "client_random");
- return NULL;
- }
- wpa_hexdump(MSG_MSGDUMP, "TLSv1: client_random",
- conn->client_random, TLS_RANDOM_LEN);
-
- len = 100 + conn->num_cipher_suites * 2 + conn->client_hello_ext_len;
- hello = os_malloc(len);
- if (hello == NULL)
- return NULL;
- end = hello + len;
-
- rhdr = hello;
- pos = rhdr + TLS_RECORD_HEADER_LEN;
-
- /* opaque fragment[TLSPlaintext.length] */
-
- /* Handshake */
- hs_start = pos;
- /* HandshakeType msg_type */
- *pos++ = TLS_HANDSHAKE_TYPE_CLIENT_HELLO;
- /* uint24 length (to be filled) */
- hs_length = pos;
- pos += 3;
- /* body - ClientHello */
- /* ProtocolVersion client_version */
- WPA_PUT_BE16(pos, TLS_VERSION);
- pos += 2;
- /* Random random: uint32 gmt_unix_time, opaque random_bytes */
- os_memcpy(pos, conn->client_random, TLS_RANDOM_LEN);
- pos += TLS_RANDOM_LEN;
- /* SessionID session_id */
- *pos++ = conn->session_id_len;
- os_memcpy(pos, conn->session_id, conn->session_id_len);
- pos += conn->session_id_len;
- /* CipherSuite cipher_suites<2..2^16-1> */
- WPA_PUT_BE16(pos, 2 * conn->num_cipher_suites);
- pos += 2;
- for (i = 0; i < conn->num_cipher_suites; i++) {
- WPA_PUT_BE16(pos, conn->cipher_suites[i]);
- pos += 2;
- }
- /* CompressionMethod compression_methods<1..2^8-1> */
- *pos++ = 1;
- *pos++ = TLS_COMPRESSION_NULL;
-
- if (conn->client_hello_ext) {
- os_memcpy(pos, conn->client_hello_ext,
- conn->client_hello_ext_len);
- pos += conn->client_hello_ext_len;
- }
-
- WPA_PUT_BE24(hs_length, pos - hs_length - 3);
- tls_verify_hash_add(&conn->verify, hs_start, pos - hs_start);
-
- if (tlsv1_record_send(&conn->rl, TLS_CONTENT_TYPE_HANDSHAKE,
- rhdr, end - rhdr, pos - hs_start, out_len) < 0) {
- wpa_printf(MSG_DEBUG, "TLSv1: Failed to create TLS record");
- tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
- TLS_ALERT_INTERNAL_ERROR);
- os_free(hello);
- return NULL;
- }
-
- conn->state = SERVER_HELLO;
-
- return hello;
-}
-
-
-static int tls_write_client_certificate(struct tlsv1_client *conn,
- u8 **msgpos, u8 *end)
-{
- u8 *pos, *rhdr, *hs_start, *hs_length, *cert_start;
- size_t rlen;
- struct x509_certificate *cert;
-
- pos = *msgpos;
-
- wpa_printf(MSG_DEBUG, "TLSv1: Send Certificate");
- rhdr = pos;
- pos += TLS_RECORD_HEADER_LEN;
-
- /* opaque fragment[TLSPlaintext.length] */
-
- /* Handshake */
- hs_start = pos;
- /* HandshakeType msg_type */
- *pos++ = TLS_HANDSHAKE_TYPE_CERTIFICATE;
- /* uint24 length (to be filled) */
- hs_length = pos;
- pos += 3;
- /* body - Certificate */
- /* uint24 length (to be filled) */
- cert_start = pos;
- pos += 3;
- cert = conn->cred ? conn->cred->cert : NULL;
- while (cert) {
- if (pos + 3 + cert->cert_len > end) {
- wpa_printf(MSG_DEBUG, "TLSv1: Not enough buffer space "
- "for Certificate (cert_len=%lu left=%lu)",
- (unsigned long) cert->cert_len,
- (unsigned long) (end - pos));
- tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
- TLS_ALERT_INTERNAL_ERROR);
- return -1;
- }
- WPA_PUT_BE24(pos, cert->cert_len);
- pos += 3;
- os_memcpy(pos, cert->cert_start, cert->cert_len);
- pos += cert->cert_len;
-
- if (x509_certificate_self_signed(cert))
- break;
- cert = x509_certificate_get_subject(conn->cred->trusted_certs,
- &cert->issuer);
- }
- if (conn->cred == NULL || cert == conn->cred->cert || cert == NULL) {
- /*
- * Client was not configured with all the needed certificates
- * to form a full certificate chain. The server may fail to
- * validate the chain unless it is configured with all the
- * missing CA certificates.
- */
- wpa_printf(MSG_DEBUG, "TLSv1: Full client certificate chain "
- "not configured - validation may fail");
- }
- WPA_PUT_BE24(cert_start, pos - cert_start - 3);
-
- WPA_PUT_BE24(hs_length, pos - hs_length - 3);
-
- if (tlsv1_record_send(&conn->rl, TLS_CONTENT_TYPE_HANDSHAKE,
- rhdr, end - rhdr, pos - hs_start, &rlen) < 0) {
- wpa_printf(MSG_DEBUG, "TLSv1: Failed to generate a record");
- tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
- TLS_ALERT_INTERNAL_ERROR);
- return -1;
- }
- pos = rhdr + rlen;
-
- tls_verify_hash_add(&conn->verify, hs_start, pos - hs_start);
-
- *msgpos = pos;
-
- return 0;
-}
-
-
-static int tlsv1_key_x_anon_dh(struct tlsv1_client *conn, u8 **pos, u8 *end)
-{
- /* ClientDiffieHellmanPublic */
- u8 *csecret, *csecret_start, *dh_yc, *shared;
- size_t csecret_len, dh_yc_len, shared_len;
-
- csecret_len = conn->dh_p_len;
- csecret = os_malloc(csecret_len);
- if (csecret == NULL) {
- wpa_printf(MSG_DEBUG, "TLSv1: Failed to allocate "
- "memory for Yc (Diffie-Hellman)");
- tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
- TLS_ALERT_INTERNAL_ERROR);
- return -1;
- }
- if (os_get_random(csecret, csecret_len)) {
- wpa_printf(MSG_DEBUG, "TLSv1: Failed to get random "
- "data for Diffie-Hellman");
- tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
- TLS_ALERT_INTERNAL_ERROR);
- os_free(csecret);
- return -1;
- }
-
- if (os_memcmp(csecret, conn->dh_p, csecret_len) > 0)
- csecret[0] = 0; /* make sure Yc < p */
-
- csecret_start = csecret;
- while (csecret_len > 1 && *csecret_start == 0) {
- csecret_start++;
- csecret_len--;
- }
- wpa_hexdump_key(MSG_DEBUG, "TLSv1: DH client's secret value",
- csecret_start, csecret_len);
-
- /* Yc = g^csecret mod p */
- dh_yc_len = conn->dh_p_len;
- dh_yc = os_malloc(dh_yc_len);
- if (dh_yc == NULL) {
- wpa_printf(MSG_DEBUG, "TLSv1: Failed to allocate "
- "memory for Diffie-Hellman");
- tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
- TLS_ALERT_INTERNAL_ERROR);
- os_free(csecret);
- return -1;
- }
- if (crypto_mod_exp(conn->dh_g, conn->dh_g_len,
- csecret_start, csecret_len,
- conn->dh_p, conn->dh_p_len,
- dh_yc, &dh_yc_len)) {
- tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
- TLS_ALERT_INTERNAL_ERROR);
- os_free(csecret);
- os_free(dh_yc);
- return -1;
- }
-
- wpa_hexdump(MSG_DEBUG, "TLSv1: DH Yc (client's public value)",
- dh_yc, dh_yc_len);
-
- WPA_PUT_BE16(*pos, dh_yc_len);
- *pos += 2;
- if (*pos + dh_yc_len > end) {
- wpa_printf(MSG_DEBUG, "TLSv1: Not enough room in the "
- "message buffer for Yc");
- tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
- TLS_ALERT_INTERNAL_ERROR);
- os_free(csecret);
- os_free(dh_yc);
- return -1;
- }
- os_memcpy(*pos, dh_yc, dh_yc_len);
- *pos += dh_yc_len;
- os_free(dh_yc);
-
- shared_len = conn->dh_p_len;
- shared = os_malloc(shared_len);
- if (shared == NULL) {
- wpa_printf(MSG_DEBUG, "TLSv1: Could not allocate memory for "
- "DH");
- tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
- TLS_ALERT_INTERNAL_ERROR);
- os_free(csecret);
- return -1;
- }
-
- /* shared = Ys^csecret mod p */
- if (crypto_mod_exp(conn->dh_ys, conn->dh_ys_len,
- csecret_start, csecret_len,
- conn->dh_p, conn->dh_p_len,
- shared, &shared_len)) {
- tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
- TLS_ALERT_INTERNAL_ERROR);
- os_free(csecret);
- os_free(shared);
- return -1;
- }
- wpa_hexdump_key(MSG_DEBUG, "TLSv1: Shared secret from DH key exchange",
- shared, shared_len);
-
- os_memset(csecret_start, 0, csecret_len);
- os_free(csecret);
- if (tls_derive_keys(conn, shared, shared_len)) {
- wpa_printf(MSG_DEBUG, "TLSv1: Failed to derive keys");
- tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
- TLS_ALERT_INTERNAL_ERROR);
- os_free(shared);
- return -1;
- }
- os_memset(shared, 0, shared_len);
- os_free(shared);
- tlsv1_client_free_dh(conn);
- return 0;
-}
-
-
-static int tlsv1_key_x_rsa(struct tlsv1_client *conn, u8 **pos, u8 *end)
-{
- u8 pre_master_secret[TLS_PRE_MASTER_SECRET_LEN];
- size_t clen;
- int res;
-
- if (tls_derive_pre_master_secret(pre_master_secret) < 0 ||
- tls_derive_keys(conn, pre_master_secret,
- TLS_PRE_MASTER_SECRET_LEN)) {
- wpa_printf(MSG_DEBUG, "TLSv1: Failed to derive keys");
- tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
- TLS_ALERT_INTERNAL_ERROR);
- return -1;
- }
-
- /* EncryptedPreMasterSecret */
- if (conn->server_rsa_key == NULL) {
- wpa_printf(MSG_DEBUG, "TLSv1: No server RSA key to "
- "use for encrypting pre-master secret");
- tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
- TLS_ALERT_INTERNAL_ERROR);
- return -1;
- }
-
- /* RSA encrypted value is encoded with PKCS #1 v1.5 block type 2. */
- *pos += 2;
- clen = end - *pos;
- res = crypto_public_key_encrypt_pkcs1_v15(
- conn->server_rsa_key,
- pre_master_secret, TLS_PRE_MASTER_SECRET_LEN,
- *pos, &clen);
- os_memset(pre_master_secret, 0, TLS_PRE_MASTER_SECRET_LEN);
- if (res < 0) {
- wpa_printf(MSG_DEBUG, "TLSv1: RSA encryption failed");
- tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
- TLS_ALERT_INTERNAL_ERROR);
- return -1;
- }
- WPA_PUT_BE16(*pos - 2, clen);
- wpa_hexdump(MSG_MSGDUMP, "TLSv1: Encrypted pre_master_secret",
- *pos, clen);
- *pos += clen;
-
- return 0;
-}
-
-
-static int tls_write_client_key_exchange(struct tlsv1_client *conn,
- u8 **msgpos, u8 *end)
-{
- u8 *pos, *rhdr, *hs_start, *hs_length;
- size_t rlen;
- tls_key_exchange keyx;
- const struct tls_cipher_suite *suite;
-
- suite = tls_get_cipher_suite(conn->rl.cipher_suite);
- if (suite == NULL)
- keyx = TLS_KEY_X_NULL;
- else
- keyx = suite->key_exchange;
-
- pos = *msgpos;
-
- wpa_printf(MSG_DEBUG, "TLSv1: Send ClientKeyExchange");
-
- rhdr = pos;
- pos += TLS_RECORD_HEADER_LEN;
-
- /* opaque fragment[TLSPlaintext.length] */
-
- /* Handshake */
- hs_start = pos;
- /* HandshakeType msg_type */
- *pos++ = TLS_HANDSHAKE_TYPE_CLIENT_KEY_EXCHANGE;
- /* uint24 length (to be filled) */
- hs_length = pos;
- pos += 3;
- /* body - ClientKeyExchange */
- if (keyx == TLS_KEY_X_DH_anon) {
- if (tlsv1_key_x_anon_dh(conn, &pos, end) < 0)
- return -1;
- } else {
- if (tlsv1_key_x_rsa(conn, &pos, end) < 0)
- return -1;
- }
-
- WPA_PUT_BE24(hs_length, pos - hs_length - 3);
-
- if (tlsv1_record_send(&conn->rl, TLS_CONTENT_TYPE_HANDSHAKE,
- rhdr, end - rhdr, pos - hs_start, &rlen) < 0) {
- wpa_printf(MSG_DEBUG, "TLSv1: Failed to create a record");
- tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
- TLS_ALERT_INTERNAL_ERROR);
- return -1;
- }
- pos = rhdr + rlen;
- tls_verify_hash_add(&conn->verify, hs_start, pos - hs_start);
-
- *msgpos = pos;
-
- return 0;
-}
-
-
-static int tls_write_client_certificate_verify(struct tlsv1_client *conn,
- u8 **msgpos, u8 *end)
-{
- u8 *pos, *rhdr, *hs_start, *hs_length, *signed_start;
- size_t rlen, hlen, clen;
- u8 hash[MD5_MAC_LEN + SHA1_MAC_LEN], *hpos;
- enum { SIGN_ALG_RSA, SIGN_ALG_DSA } alg = SIGN_ALG_RSA;
-
- pos = *msgpos;
-
- wpa_printf(MSG_DEBUG, "TLSv1: Send CertificateVerify");
- rhdr = pos;
- pos += TLS_RECORD_HEADER_LEN;
-
- /* Handshake */
- hs_start = pos;
- /* HandshakeType msg_type */
- *pos++ = TLS_HANDSHAKE_TYPE_CERTIFICATE_VERIFY;
- /* uint24 length (to be filled) */
- hs_length = pos;
- pos += 3;
-
- /*
- * RFC 2246: 7.4.3 and 7.4.8:
- * Signature signature
- *
- * RSA:
- * digitally-signed struct {
- * opaque md5_hash[16];
- * opaque sha_hash[20];
- * };
- *
- * DSA:
- * digitally-signed struct {
- * opaque sha_hash[20];
- * };
- *
- * The hash values are calculated over all handshake messages sent or
- * received starting at ClientHello up to, but not including, this
- * CertificateVerify message, including the type and length fields of
- * the handshake messages.
- */
-
- hpos = hash;
-
- if (alg == SIGN_ALG_RSA) {
- hlen = MD5_MAC_LEN;
- if (conn->verify.md5_cert == NULL ||
- crypto_hash_finish(conn->verify.md5_cert, hpos, &hlen) < 0)
- {
- tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
- TLS_ALERT_INTERNAL_ERROR);
- conn->verify.md5_cert = NULL;
- crypto_hash_finish(conn->verify.sha1_cert, NULL, NULL);
- conn->verify.sha1_cert = NULL;
- return -1;
- }
- hpos += MD5_MAC_LEN;
- } else
- crypto_hash_finish(conn->verify.md5_cert, NULL, NULL);
-
- conn->verify.md5_cert = NULL;
- hlen = SHA1_MAC_LEN;
- if (conn->verify.sha1_cert == NULL ||
- crypto_hash_finish(conn->verify.sha1_cert, hpos, &hlen) < 0) {
- conn->verify.sha1_cert = NULL;
- tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
- TLS_ALERT_INTERNAL_ERROR);
- return -1;
- }
- conn->verify.sha1_cert = NULL;
-
- if (alg == SIGN_ALG_RSA)
- hlen += MD5_MAC_LEN;
-
- wpa_hexdump(MSG_MSGDUMP, "TLSv1: CertificateVerify hash", hash, hlen);
-
- /*
- * RFC 2246, 4.7:
- * In digital signing, one-way hash functions are used as input for a
- * signing algorithm. A digitally-signed element is encoded as an
- * opaque vector <0..2^16-1>, where the length is specified by the
- * signing algorithm and key.
- *
- * In RSA signing, a 36-byte structure of two hashes (one SHA and one
- * MD5) is signed (encrypted with the private key). It is encoded with
- * PKCS #1 block type 0 or type 1 as described in [PKCS1].
- */
- signed_start = pos; /* length to be filled */
- pos += 2;
- clen = end - pos;
- if (conn->cred == NULL ||
- crypto_private_key_sign_pkcs1(conn->cred->key, hash, hlen,
- pos, &clen) < 0) {
- wpa_printf(MSG_DEBUG, "TLSv1: Failed to sign hash (PKCS #1)");
- tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
- TLS_ALERT_INTERNAL_ERROR);
- return -1;
- }
- WPA_PUT_BE16(signed_start, clen);
-
- pos += clen;
-
- WPA_PUT_BE24(hs_length, pos - hs_length - 3);
-
- if (tlsv1_record_send(&conn->rl, TLS_CONTENT_TYPE_HANDSHAKE,
- rhdr, end - rhdr, pos - hs_start, &rlen) < 0) {
- wpa_printf(MSG_DEBUG, "TLSv1: Failed to generate a record");
- tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
- TLS_ALERT_INTERNAL_ERROR);
- return -1;
- }
- pos = rhdr + rlen;
-
- tls_verify_hash_add(&conn->verify, hs_start, pos - hs_start);
-
- *msgpos = pos;
-
- return 0;
-}
-
-
-static int tls_write_client_change_cipher_spec(struct tlsv1_client *conn,
- u8 **msgpos, u8 *end)
-{
- u8 *pos, *rhdr;
- size_t rlen;
-
- pos = *msgpos;
-
- wpa_printf(MSG_DEBUG, "TLSv1: Send ChangeCipherSpec");
- rhdr = pos;
- pos += TLS_RECORD_HEADER_LEN;
- *pos = TLS_CHANGE_CIPHER_SPEC;
- if (tlsv1_record_send(&conn->rl, TLS_CONTENT_TYPE_CHANGE_CIPHER_SPEC,
- rhdr, end - rhdr, 1, &rlen) < 0) {
- wpa_printf(MSG_DEBUG, "TLSv1: Failed to create a record");
- tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
- TLS_ALERT_INTERNAL_ERROR);
- return -1;
- }
-
- if (tlsv1_record_change_write_cipher(&conn->rl) < 0) {
- wpa_printf(MSG_DEBUG, "TLSv1: Failed to set write cipher for "
- "record layer");
- tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
- TLS_ALERT_INTERNAL_ERROR);
- return -1;
- }
-
- *msgpos = rhdr + rlen;
-
- return 0;
-}
-
-
-static int tls_write_client_finished(struct tlsv1_client *conn,
- u8 **msgpos, u8 *end)
-{
- u8 *pos, *rhdr, *hs_start, *hs_length;
- size_t rlen, hlen;
- u8 verify_data[TLS_VERIFY_DATA_LEN];
- u8 hash[MD5_MAC_LEN + SHA1_MAC_LEN];
-
- pos = *msgpos;
-
- wpa_printf(MSG_DEBUG, "TLSv1: Send Finished");
-
- /* Encrypted Handshake Message: Finished */
-
- hlen = MD5_MAC_LEN;
- if (conn->verify.md5_client == NULL ||
- crypto_hash_finish(conn->verify.md5_client, hash, &hlen) < 0) {
- tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
- TLS_ALERT_INTERNAL_ERROR);
- conn->verify.md5_client = NULL;
- crypto_hash_finish(conn->verify.sha1_client, NULL, NULL);
- conn->verify.sha1_client = NULL;
- return -1;
- }
- conn->verify.md5_client = NULL;
- hlen = SHA1_MAC_LEN;
- if (conn->verify.sha1_client == NULL ||
- crypto_hash_finish(conn->verify.sha1_client, hash + MD5_MAC_LEN,
- &hlen) < 0) {
- conn->verify.sha1_client = NULL;
- tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
- TLS_ALERT_INTERNAL_ERROR);
- return -1;
- }
- conn->verify.sha1_client = NULL;
-
- if (tls_prf(conn->master_secret, TLS_MASTER_SECRET_LEN,
- "client finished", hash, MD5_MAC_LEN + SHA1_MAC_LEN,
- verify_data, TLS_VERIFY_DATA_LEN)) {
- wpa_printf(MSG_DEBUG, "TLSv1: Failed to generate verify_data");
- tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
- TLS_ALERT_INTERNAL_ERROR);
- return -1;
- }
- wpa_hexdump_key(MSG_DEBUG, "TLSv1: verify_data (client)",
- verify_data, TLS_VERIFY_DATA_LEN);
-
- rhdr = pos;
- pos += TLS_RECORD_HEADER_LEN;
- /* Handshake */
- hs_start = pos;
- /* HandshakeType msg_type */
- *pos++ = TLS_HANDSHAKE_TYPE_FINISHED;
- /* uint24 length (to be filled) */
- hs_length = pos;
- pos += 3;
- os_memcpy(pos, verify_data, TLS_VERIFY_DATA_LEN);
- pos += TLS_VERIFY_DATA_LEN;
- WPA_PUT_BE24(hs_length, pos - hs_length - 3);
- tls_verify_hash_add(&conn->verify, hs_start, pos - hs_start);
-
- if (tlsv1_record_send(&conn->rl, TLS_CONTENT_TYPE_HANDSHAKE,
- rhdr, end - rhdr, pos - hs_start, &rlen) < 0) {
- wpa_printf(MSG_DEBUG, "TLSv1: Failed to create a record");
- tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
- TLS_ALERT_INTERNAL_ERROR);
- return -1;
- }
-
- pos = rhdr + rlen;
-
- *msgpos = pos;
-
- return 0;
-}
-
-
-static u8 * tls_send_client_key_exchange(struct tlsv1_client *conn,
- size_t *out_len)
-{
- u8 *msg, *end, *pos;
- size_t msglen;
-
- *out_len = 0;
-
- msglen = 1000;
- if (conn->certificate_requested)
- msglen += tls_client_cert_chain_der_len(conn);
-
- msg = os_malloc(msglen);
- if (msg == NULL)
- return NULL;
-
- pos = msg;
- end = msg + msglen;
-
- if (conn->certificate_requested) {
- if (tls_write_client_certificate(conn, &pos, end) < 0) {
- os_free(msg);
- return NULL;
- }
- }
-
- if (tls_write_client_key_exchange(conn, &pos, end) < 0 ||
- (conn->certificate_requested && conn->cred && conn->cred->key &&
- tls_write_client_certificate_verify(conn, &pos, end) < 0) ||
- tls_write_client_change_cipher_spec(conn, &pos, end) < 0 ||
- tls_write_client_finished(conn, &pos, end) < 0) {
- os_free(msg);
- return NULL;
- }
-
- *out_len = pos - msg;
-
- conn->state = SERVER_CHANGE_CIPHER_SPEC;
-
- return msg;
-}
-
-
-static u8 * tls_send_change_cipher_spec(struct tlsv1_client *conn,
- size_t *out_len)
-{
- u8 *msg, *end, *pos;
-
- *out_len = 0;
-
- msg = os_malloc(1000);
- if (msg == NULL)
- return NULL;
-
- pos = msg;
- end = msg + 1000;
-
- if (tls_write_client_change_cipher_spec(conn, &pos, end) < 0 ||
- tls_write_client_finished(conn, &pos, end) < 0) {
- os_free(msg);
- return NULL;
- }
-
- *out_len = pos - msg;
-
- wpa_printf(MSG_DEBUG, "TLSv1: Session resumption completed "
- "successfully");
- conn->state = ESTABLISHED;
-
- return msg;
-}
-
-
-u8 * tlsv1_client_handshake_write(struct tlsv1_client *conn, size_t *out_len,
- int no_appl_data)
-{
- switch (conn->state) {
- case CLIENT_KEY_EXCHANGE:
- return tls_send_client_key_exchange(conn, out_len);
- case CHANGE_CIPHER_SPEC:
- return tls_send_change_cipher_spec(conn, out_len);
- case ACK_FINISHED:
- wpa_printf(MSG_DEBUG, "TLSv1: Handshake completed "
- "successfully");
- conn->state = ESTABLISHED;
- *out_len = 0;
- if (no_appl_data) {
- /* Need to return something to get final TLS ACK. */
- return os_malloc(1);
- }
- return NULL;
- default:
- wpa_printf(MSG_DEBUG, "TLSv1: Unexpected state %d while "
- "generating reply", conn->state);
- return NULL;
- }
-}
-
-
-u8 * tlsv1_client_send_alert(struct tlsv1_client *conn, u8 level,
- u8 description, size_t *out_len)
-{
- u8 *alert, *pos, *length;
-
- wpa_printf(MSG_DEBUG, "TLSv1: Send Alert(%d:%d)", level, description);
- *out_len = 0;
-
- alert = os_malloc(10);
- if (alert == NULL)
- return NULL;
-
- pos = alert;
-
- /* TLSPlaintext */
- /* ContentType type */
- *pos++ = TLS_CONTENT_TYPE_ALERT;
- /* ProtocolVersion version */
- WPA_PUT_BE16(pos, TLS_VERSION);
- pos += 2;
- /* uint16 length (to be filled) */
- length = pos;
- pos += 2;
- /* opaque fragment[TLSPlaintext.length] */
-
- /* Alert */
- /* AlertLevel level */
- *pos++ = level;
- /* AlertDescription description */
- *pos++ = description;
-
- WPA_PUT_BE16(length, pos - length - 2);
- *out_len = pos - alert;
-
- return alert;
-}
projects / mech_eap.git / blobdiff