From e2496982472bdf233be95c5ea72d1c4dc6c91db3 Mon Sep 17 00:00:00 2001 From: cvs2svn Date: Sun, 23 Apr 2023 13:43:47 +0000 Subject: This commit was manufactured by cvs2git to create tag 'tb_20230422'. --- src/lib/libssl/t1_lib.c | 1132 ----------------------------------------------- 1 file changed, 1132 deletions(-) delete mode 100644 src/lib/libssl/t1_lib.c (limited to 'src/lib/libssl/t1_lib.c') diff --git a/src/lib/libssl/t1_lib.c b/src/lib/libssl/t1_lib.c deleted file mode 100644 index 85d5eaa633..0000000000 --- a/src/lib/libssl/t1_lib.c +++ /dev/null @@ -1,1132 +0,0 @@ -/* $OpenBSD: t1_lib.c,v 1.197 2022/11/26 16:08:56 tb Exp $ */ -/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) - * All rights reserved. - * - * This package is an SSL implementation written - * by Eric Young (eay@cryptsoft.com). - * The implementation was written so as to conform with Netscapes SSL. - * - * This library is free for commercial and non-commercial use as long as - * the following conditions are aheared to. The following conditions - * apply to all code found in this distribution, be it the RC4, RSA, - * lhash, DES, etc., code; not just the SSL code. The SSL documentation - * included with this distribution is covered by the same copyright terms - * except that the holder is Tim Hudson (tjh@cryptsoft.com). - * - * Copyright remains Eric Young's, and as such any Copyright notices in - * the code are not to be removed. - * If this package is used in a product, Eric Young should be given attribution - * as the author of the parts of the library used. - * This can be in the form of a textual message at program startup or - * in documentation (online or textual) provided with the package. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * "This product includes cryptographic software written by - * Eric Young (eay@cryptsoft.com)" - * The word 'cryptographic' can be left out if the rouines from the library - * being used are not cryptographic related :-). - * 4. If you include any Windows specific code (or a derivative thereof) from - * the apps directory (application code) you must include an acknowledgement: - * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" - * - * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * The licence and distribution terms for any publically available version or - * derivative of this code cannot be changed. i.e. this code cannot simply be - * copied and put under another distribution licence - * [including the GNU Public Licence.] - */ -/* ==================================================================== - * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * - * 3. All advertising materials mentioning features or use of this - * software must display the following acknowledgment: - * "This product includes software developed by the OpenSSL Project - * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" - * - * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to - * endorse or promote products derived from this software without - * prior written permission. For written permission, please contact - * openssl-core@openssl.org. - * - * 5. Products derived from this software may not be called "OpenSSL" - * nor may "OpenSSL" appear in their names without prior written - * permission of the OpenSSL Project. - * - * 6. Redistributions of any form whatsoever must retain the following - * acknowledgment: - * "This product includes software developed by the OpenSSL Project - * for use in the OpenSSL Toolkit (http://www.openssl.org/)" - * - * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY - * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR - * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; - * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, - * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED - * OF THE POSSIBILITY OF SUCH DAMAGE. - * ==================================================================== - * - * This product includes cryptographic software written by Eric Young - * (eay@cryptsoft.com). This product includes software written by Tim - * Hudson (tjh@cryptsoft.com). - * - */ - -#include - -#include -#include -#include -#include - -#include "bytestring.h" -#include "ssl_local.h" -#include "ssl_sigalgs.h" -#include "ssl_tlsext.h" - -static int tls_decrypt_ticket(SSL *s, CBS *ticket, int *alert, - SSL_SESSION **psess); - -int -tls1_new(SSL *s) -{ - if (!ssl3_new(s)) - return (0); - s->method->ssl_clear(s); - return (1); -} - -void -tls1_free(SSL *s) -{ - if (s == NULL) - return; - - free(s->tlsext_session_ticket); - ssl3_free(s); -} - -void -tls1_clear(SSL *s) -{ - ssl3_clear(s); - s->version = s->method->version; -} - -struct supported_group { - int nid; - int bits; -}; - -/* - * Supported groups (formerly known as named curves) - * https://www.iana.org/assignments/tls-parameters/#tls-parameters-8 - */ -static const struct supported_group nid_list[] = { - [1] = { - .nid = NID_sect163k1, - .bits = 80, - }, - [2] = { - .nid = NID_sect163r1, - .bits = 80, - }, - [3] = { - .nid = NID_sect163r2, - .bits = 80, - }, - [4] = { - .nid = NID_sect193r1, - .bits = 80, - }, - [5] = { - .nid = NID_sect193r2, - .bits = 80, - }, - [6] = { - .nid = NID_sect233k1, - .bits = 112, - }, - [7] = { - .nid = NID_sect233r1, - .bits = 112, - }, - [8] = { - .nid = NID_sect239k1, - .bits = 112, - }, - [9] = { - .nid = NID_sect283k1, - .bits = 128, - }, - [10] = { - .nid = NID_sect283r1, - .bits = 128, - }, - [11] = { - .nid = NID_sect409k1, - .bits = 192, - }, - [12] = { - .nid = NID_sect409r1, - .bits = 192, - }, - [13] = { - .nid = NID_sect571k1, - .bits = 256, - }, - [14] = { - .nid = NID_sect571r1, - .bits = 256, - }, - [15] = { - .nid = NID_secp160k1, - .bits = 80, - }, - [16] = { - .nid = NID_secp160r1, - .bits = 80, - }, - [17] = { - .nid = NID_secp160r2, - .bits = 80, - }, - [18] = { - .nid = NID_secp192k1, - .bits = 80, - }, - [19] = { - .nid = NID_X9_62_prime192v1, /* aka secp192r1 */ - .bits = 80, - }, - [20] = { - .nid = NID_secp224k1, - .bits = 112, - }, - [21] = { - .nid = NID_secp224r1, - .bits = 112, - }, - [22] = { - .nid = NID_secp256k1, - .bits = 128, - }, - [23] = { - .nid = NID_X9_62_prime256v1, /* aka secp256r1 */ - .bits = 128, - }, - [24] = { - .nid = NID_secp384r1, - .bits = 192, - }, - [25] = { - .nid = NID_secp521r1, - .bits = 256, - }, - [26] = { - .nid = NID_brainpoolP256r1, - .bits = 128, - }, - [27] = { - .nid = NID_brainpoolP384r1, - .bits = 192, - }, - [28] = { - .nid = NID_brainpoolP512r1, - .bits = 256, - }, - [29] = { - .nid = NID_X25519, - .bits = 128, - }, -}; - -#define NID_LIST_LEN (sizeof(nid_list) / sizeof(nid_list[0])) - -#if 0 -static const uint8_t ecformats_list[] = { - TLSEXT_ECPOINTFORMAT_uncompressed, - TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime, - TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2 -}; -#endif - -static const uint8_t ecformats_default[] = { - TLSEXT_ECPOINTFORMAT_uncompressed, -}; - -#if 0 -static const uint16_t ecgroups_list[] = { - 29, /* X25519 (29) */ - 14, /* sect571r1 (14) */ - 13, /* sect571k1 (13) */ - 25, /* secp521r1 (25) */ - 28, /* brainpoolP512r1 (28) */ - 11, /* sect409k1 (11) */ - 12, /* sect409r1 (12) */ - 27, /* brainpoolP384r1 (27) */ - 24, /* secp384r1 (24) */ - 9, /* sect283k1 (9) */ - 10, /* sect283r1 (10) */ - 26, /* brainpoolP256r1 (26) */ - 22, /* secp256k1 (22) */ - 23, /* secp256r1 (23) */ - 8, /* sect239k1 (8) */ - 6, /* sect233k1 (6) */ - 7, /* sect233r1 (7) */ - 20, /* secp224k1 (20) */ - 21, /* secp224r1 (21) */ - 4, /* sect193r1 (4) */ - 5, /* sect193r2 (5) */ - 18, /* secp192k1 (18) */ - 19, /* secp192r1 (19) */ - 1, /* sect163k1 (1) */ - 2, /* sect163r1 (2) */ - 3, /* sect163r2 (3) */ - 15, /* secp160k1 (15) */ - 16, /* secp160r1 (16) */ - 17, /* secp160r2 (17) */ -}; -#endif - -static const uint16_t ecgroups_client_default[] = { - 29, /* X25519 (29) */ - 23, /* secp256r1 (23) */ - 24, /* secp384r1 (24) */ - 25, /* secp521r1 (25) */ -}; - -static const uint16_t ecgroups_server_default[] = { - 29, /* X25519 (29) */ - 23, /* secp256r1 (23) */ - 24, /* secp384r1 (24) */ -}; - -int -tls1_ec_group_id2nid(uint16_t group_id, int *out_nid) -{ - int nid; - - if (group_id >= NID_LIST_LEN) - return 0; - - if ((nid = nid_list[group_id].nid) == 0) - return 0; - - *out_nid = nid; - - return 1; -} - -int -tls1_ec_group_id2bits(uint16_t group_id, int *out_bits) -{ - int bits; - - if (group_id >= NID_LIST_LEN) - return 0; - - if ((bits = nid_list[group_id].bits) == 0) - return 0; - - *out_bits = bits; - - return 1; -} - -int -tls1_ec_nid2group_id(int nid, uint16_t *out_group_id) -{ - uint16_t group_id; - - if (nid == 0) - return 0; - - for (group_id = 0; group_id < NID_LIST_LEN; group_id++) { - if (nid_list[group_id].nid == nid) { - *out_group_id = group_id; - return 1; - } - } - - return 0; -} - -/* - * Return the appropriate format list. If client_formats is non-zero, return - * the client/session formats. Otherwise return the custom format list if one - * exists, or the default formats if a custom list has not been specified. - */ -void -tls1_get_formatlist(const SSL *s, int client_formats, const uint8_t **pformats, - size_t *pformatslen) -{ - if (client_formats != 0) { - *pformats = s->session->tlsext_ecpointformatlist; - *pformatslen = s->session->tlsext_ecpointformatlist_length; - return; - } - - *pformats = s->tlsext_ecpointformatlist; - *pformatslen = s->tlsext_ecpointformatlist_length; - if (*pformats == NULL) { - *pformats = ecformats_default; - *pformatslen = sizeof(ecformats_default); - } -} - -/* - * Return the appropriate group list. If client_groups is non-zero, return - * the client/session groups. Otherwise return the custom group list if one - * exists, or the default groups if a custom list has not been specified. - */ -void -tls1_get_group_list(const SSL *s, int client_groups, const uint16_t **pgroups, - size_t *pgroupslen) -{ - if (client_groups != 0) { - *pgroups = s->session->tlsext_supportedgroups; - *pgroupslen = s->session->tlsext_supportedgroups_length; - return; - } - - *pgroups = s->tlsext_supportedgroups; - *pgroupslen = s->tlsext_supportedgroups_length; - if (*pgroups != NULL) - return; - - if (!s->server) { - *pgroups = ecgroups_client_default; - *pgroupslen = sizeof(ecgroups_client_default) / 2; - } else { - *pgroups = ecgroups_server_default; - *pgroupslen = sizeof(ecgroups_server_default) / 2; - } -} - -static int -tls1_get_group_lists(const SSL *ssl, const uint16_t **pref, size_t *preflen, - const uint16_t **supp, size_t *supplen) -{ - unsigned long server_pref; - - /* Cannot do anything on the client side. */ - if (!ssl->server) - return 0; - - server_pref = (ssl->options & SSL_OP_CIPHER_SERVER_PREFERENCE); - tls1_get_group_list(ssl, (server_pref == 0), pref, preflen); - tls1_get_group_list(ssl, (server_pref != 0), supp, supplen); - - return 1; -} - -static int -tls1_group_id_present(uint16_t group_id, const uint16_t *list, size_t list_len) -{ - size_t i; - - for (i = 0; i < list_len; i++) { - if (group_id == list[i]) - return 1; - } - - return 0; -} - -int -tls1_count_shared_groups(const SSL *ssl, size_t *out_count) -{ - size_t count, preflen, supplen, i; - const uint16_t *pref, *supp; - - if (!tls1_get_group_lists(ssl, &pref, &preflen, &supp, &supplen)) - return 0; - - count = 0; - for (i = 0; i < preflen; i++) { - if (!tls1_group_id_present(pref[i], supp, supplen)) - continue; - - if (!ssl_security_shared_group(ssl, pref[i])) - continue; - - count++; - } - - *out_count = count; - - return 1; -} - -static int -tls1_group_by_index(const SSL *ssl, size_t n, int *out_nid, - int (*ssl_security_fn)(const SSL *, uint16_t)) -{ - size_t count, preflen, supplen, i; - const uint16_t *pref, *supp; - - if (!tls1_get_group_lists(ssl, &pref, &preflen, &supp, &supplen)) - return 0; - - count = 0; - for (i = 0; i < preflen; i++) { - if (!tls1_group_id_present(pref[i], supp, supplen)) - continue; - - if (!ssl_security_fn(ssl, pref[i])) - continue; - - if (count++ == n) - return tls1_ec_group_id2nid(pref[i], out_nid); - } - - return 0; -} - -int -tls1_get_shared_group_by_index(const SSL *ssl, size_t index, int *out_nid) -{ - return tls1_group_by_index(ssl, index, out_nid, - ssl_security_shared_group); -} - -int -tls1_get_supported_group(const SSL *ssl, int *out_nid) -{ - return tls1_group_by_index(ssl, 0, out_nid, - ssl_security_supported_group); -} - -int -tls1_set_groups(uint16_t **out_group_ids, size_t *out_group_ids_len, - const int *groups, size_t ngroups) -{ - uint16_t *group_ids; - size_t i; - - if ((group_ids = calloc(ngroups, sizeof(uint16_t))) == NULL) - return 0; - - for (i = 0; i < ngroups; i++) { - if (!tls1_ec_nid2group_id(groups[i], &group_ids[i])) { - free(group_ids); - return 0; - } - } - - free(*out_group_ids); - *out_group_ids = group_ids; - *out_group_ids_len = ngroups; - - return 1; -} - -int -tls1_set_group_list(uint16_t **out_group_ids, size_t *out_group_ids_len, - const char *groups) -{ - uint16_t *new_group_ids, *group_ids = NULL; - size_t ngroups = 0; - char *gs, *p, *q; - int nid; - - if ((gs = strdup(groups)) == NULL) - return 0; - - q = gs; - while ((p = strsep(&q, ":")) != NULL) { - nid = OBJ_sn2nid(p); - if (nid == NID_undef) - nid = OBJ_ln2nid(p); - if (nid == NID_undef) - nid = EC_curve_nist2nid(p); - if (nid == NID_undef) - goto err; - - if ((new_group_ids = reallocarray(group_ids, ngroups + 1, - sizeof(uint16_t))) == NULL) - goto err; - group_ids = new_group_ids; - - if (!tls1_ec_nid2group_id(nid, &group_ids[ngroups])) - goto err; - - ngroups++; - } - - free(gs); - free(*out_group_ids); - *out_group_ids = group_ids; - *out_group_ids_len = ngroups; - - return 1; - - err: - free(gs); - free(group_ids); - - return 0; -} - -/* Check that a group is one of our preferences. */ -int -tls1_check_group(SSL *s, uint16_t group_id) -{ - const uint16_t *groups; - size_t groupslen, i; - - tls1_get_group_list(s, 0, &groups, &groupslen); - - for (i = 0; i < groupslen; i++) { - if (!ssl_security_supported_group(s, groups[i])) - continue; - if (groups[i] == group_id) - return 1; - } - return 0; -} - -/* For an EC key set TLS ID and required compression based on parameters. */ -static int -tls1_set_ec_id(uint16_t *group_id, uint8_t *comp_id, EC_KEY *ec) -{ - const EC_GROUP *grp; - const EC_METHOD *meth; - int prime_field; - int nid; - - if (ec == NULL) - return (0); - - /* Determine whether the group is defined over a prime field. */ - if ((grp = EC_KEY_get0_group(ec)) == NULL) - return (0); - if ((meth = EC_GROUP_method_of(grp)) == NULL) - return (0); - prime_field = (EC_METHOD_get_field_type(meth) == NID_X9_62_prime_field); - - /* Determine group ID. */ - nid = EC_GROUP_get_curve_name(grp); - /* If we have an ID set it, otherwise set arbitrary explicit group. */ - if (!tls1_ec_nid2group_id(nid, group_id)) - *group_id = prime_field ? 0xff01 : 0xff02; - - if (comp_id == NULL) - return (1); - - /* Specify the compression identifier. */ - if (EC_KEY_get0_public_key(ec) == NULL) - return (0); - *comp_id = TLSEXT_ECPOINTFORMAT_uncompressed; - if (EC_KEY_get_conv_form(ec) == POINT_CONVERSION_COMPRESSED) { - *comp_id = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2; - if (prime_field) - *comp_id = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime; - } - - return (1); -} - -/* Check that an EC key is compatible with extensions. */ -static int -tls1_check_ec_key(SSL *s, const uint16_t *group_id, const uint8_t *comp_id) -{ - size_t groupslen, formatslen, i; - const uint16_t *groups; - const uint8_t *formats; - - /* - * Check point formats extension if present, otherwise everything - * is supported (see RFC4492). - */ - tls1_get_formatlist(s, 1, &formats, &formatslen); - if (comp_id != NULL && formats != NULL) { - for (i = 0; i < formatslen; i++) { - if (formats[i] == *comp_id) - break; - } - if (i == formatslen) - return (0); - } - - /* - * Check group list if present, otherwise everything is supported. - */ - tls1_get_group_list(s, 1, &groups, &groupslen); - if (group_id != NULL && groups != NULL) { - for (i = 0; i < groupslen; i++) { - if (groups[i] == *group_id) - break; - } - if (i == groupslen) - return (0); - } - - return (1); -} - -/* Check EC server key is compatible with client extensions. */ -int -tls1_check_ec_server_key(SSL *s) -{ - SSL_CERT_PKEY *cpk = s->cert->pkeys + SSL_PKEY_ECC; - uint16_t group_id; - uint8_t comp_id; - EC_KEY *eckey; - EVP_PKEY *pkey; - - if (cpk->x509 == NULL || cpk->privatekey == NULL) - return (0); - if ((pkey = X509_get0_pubkey(cpk->x509)) == NULL) - return (0); - if ((eckey = EVP_PKEY_get0_EC_KEY(pkey)) == NULL) - return (0); - if (!tls1_set_ec_id(&group_id, &comp_id, eckey)) - return (0); - - return tls1_check_ec_key(s, &group_id, &comp_id); -} - -int -ssl_check_clienthello_tlsext_early(SSL *s) -{ - int ret = SSL_TLSEXT_ERR_NOACK; - int al = SSL_AD_UNRECOGNIZED_NAME; - - /* The handling of the ECPointFormats extension is done elsewhere, namely in - * ssl3_choose_cipher in s3_lib.c. - */ - /* The handling of the EllipticCurves extension is done elsewhere, namely in - * ssl3_choose_cipher in s3_lib.c. - */ - - if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0) - ret = s->ctx->tlsext_servername_callback(s, &al, - s->ctx->tlsext_servername_arg); - else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0) - ret = s->initial_ctx->tlsext_servername_callback(s, &al, - s->initial_ctx->tlsext_servername_arg); - - switch (ret) { - case SSL_TLSEXT_ERR_ALERT_FATAL: - ssl3_send_alert(s, SSL3_AL_FATAL, al); - return -1; - case SSL_TLSEXT_ERR_ALERT_WARNING: - ssl3_send_alert(s, SSL3_AL_WARNING, al); - return 1; - case SSL_TLSEXT_ERR_NOACK: - default: - return 1; - } -} - -int -ssl_check_clienthello_tlsext_late(SSL *s) -{ - int ret = SSL_TLSEXT_ERR_OK; - int al = 0; /* XXX gcc3 */ - - /* If status request then ask callback what to do. - * Note: this must be called after servername callbacks in case - * the certificate has changed, and must be called after the cipher - * has been chosen because this may influence which certificate is sent - */ - if ((s->tlsext_status_type != -1) && - s->ctx && s->ctx->tlsext_status_cb) { - int r; - SSL_CERT_PKEY *certpkey; - certpkey = ssl_get_server_send_pkey(s); - /* If no certificate can't return certificate status */ - if (certpkey == NULL) { - s->tlsext_status_expected = 0; - return 1; - } - /* Set current certificate to one we will use so - * SSL_get_certificate et al can pick it up. - */ - s->cert->key = certpkey; - r = s->ctx->tlsext_status_cb(s, - s->ctx->tlsext_status_arg); - switch (r) { - /* We don't want to send a status request response */ - case SSL_TLSEXT_ERR_NOACK: - s->tlsext_status_expected = 0; - break; - /* status request response should be sent */ - case SSL_TLSEXT_ERR_OK: - if (s->tlsext_ocsp_resp) - s->tlsext_status_expected = 1; - else - s->tlsext_status_expected = 0; - break; - /* something bad happened */ - case SSL_TLSEXT_ERR_ALERT_FATAL: - ret = SSL_TLSEXT_ERR_ALERT_FATAL; - al = SSL_AD_INTERNAL_ERROR; - goto err; - } - } else - s->tlsext_status_expected = 0; - - err: - switch (ret) { - case SSL_TLSEXT_ERR_ALERT_FATAL: - ssl3_send_alert(s, SSL3_AL_FATAL, al); - return -1; - case SSL_TLSEXT_ERR_ALERT_WARNING: - ssl3_send_alert(s, SSL3_AL_WARNING, al); - return 1; - default: - return 1; - } -} - -int -ssl_check_serverhello_tlsext(SSL *s) -{ - int ret = SSL_TLSEXT_ERR_NOACK; - int al = SSL_AD_UNRECOGNIZED_NAME; - - ret = SSL_TLSEXT_ERR_OK; - - if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0) - ret = s->ctx->tlsext_servername_callback(s, &al, - s->ctx->tlsext_servername_arg); - else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0) - ret = s->initial_ctx->tlsext_servername_callback(s, &al, - s->initial_ctx->tlsext_servername_arg); - - /* If we've requested certificate status and we wont get one - * tell the callback - */ - if ((s->tlsext_status_type != -1) && !(s->tlsext_status_expected) && - s->ctx && s->ctx->tlsext_status_cb) { - int r; - - free(s->tlsext_ocsp_resp); - s->tlsext_ocsp_resp = NULL; - s->tlsext_ocsp_resp_len = 0; - - r = s->ctx->tlsext_status_cb(s, - s->ctx->tlsext_status_arg); - if (r == 0) { - al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; - ret = SSL_TLSEXT_ERR_ALERT_FATAL; - } - if (r < 0) { - al = SSL_AD_INTERNAL_ERROR; - ret = SSL_TLSEXT_ERR_ALERT_FATAL; - } - } - - switch (ret) { - case SSL_TLSEXT_ERR_ALERT_FATAL: - ssl3_send_alert(s, SSL3_AL_FATAL, al); - return -1; - case SSL_TLSEXT_ERR_ALERT_WARNING: - ssl3_send_alert(s, SSL3_AL_WARNING, al); - return 1; - case SSL_TLSEXT_ERR_NOACK: - default: - return 1; - } -} - -/* Since the server cache lookup is done early on in the processing of the - * ClientHello, and other operations depend on the result, we need to handle - * any TLS session ticket extension at the same time. - * - * ext_block: a CBS for the ClientHello extensions block. - * ret: (output) on return, if a ticket was decrypted, then this is set to - * point to the resulting session. - * - * If s->tls_session_secret_cb is set then we are expecting a pre-shared key - * ciphersuite, in which case we have no use for session tickets and one will - * never be decrypted, nor will s->tlsext_ticket_expected be set to 1. - * - * Returns: - * TLS1_TICKET_FATAL_ERROR: error from parsing or decrypting the ticket. - * TLS1_TICKET_NONE: no ticket was found (or was ignored, based on settings). - * TLS1_TICKET_EMPTY: a zero length extension was found, indicating that the - * client supports session tickets but doesn't currently have one to offer. - * TLS1_TICKET_NOT_DECRYPTED: either s->tls_session_secret_cb was - * set, or a ticket was offered but couldn't be decrypted because of a - * non-fatal error. - * TLS1_TICKET_DECRYPTED: a ticket was successfully decrypted and *ret was set. - * - * Side effects: - * Sets s->tlsext_ticket_expected to 1 if the server will have to issue - * a new session ticket to the client because the client indicated support - * (and s->tls_session_secret_cb is NULL) but the client either doesn't have - * a session ticket or we couldn't use the one it gave us, or if - * s->ctx->tlsext_ticket_key_cb asked to renew the client's ticket. - * Otherwise, s->tlsext_ticket_expected is set to 0. - */ -int -tls1_process_ticket(SSL *s, CBS *ext_block, int *alert, SSL_SESSION **ret) -{ - CBS extensions, ext_data; - uint16_t ext_type = 0; - - s->tlsext_ticket_expected = 0; - *ret = NULL; - - /* - * If tickets disabled behave as if no ticket present to permit stateful - * resumption. - */ - if (SSL_get_options(s) & SSL_OP_NO_TICKET) - return TLS1_TICKET_NONE; - - /* - * An empty extensions block is valid, but obviously does not contain - * a session ticket. - */ - if (CBS_len(ext_block) == 0) - return TLS1_TICKET_NONE; - - if (!CBS_get_u16_length_prefixed(ext_block, &extensions)) { - *alert = SSL_AD_DECODE_ERROR; - return TLS1_TICKET_FATAL_ERROR; - } - - while (CBS_len(&extensions) > 0) { - if (!CBS_get_u16(&extensions, &ext_type) || - !CBS_get_u16_length_prefixed(&extensions, &ext_data)) { - *alert = SSL_AD_DECODE_ERROR; - return TLS1_TICKET_FATAL_ERROR; - } - - if (ext_type == TLSEXT_TYPE_session_ticket) - break; - } - - if (ext_type != TLSEXT_TYPE_session_ticket) - return TLS1_TICKET_NONE; - - if (CBS_len(&ext_data) == 0) { - /* - * The client will accept a ticket but does not currently - * have one. - */ - s->tlsext_ticket_expected = 1; - return TLS1_TICKET_EMPTY; - } - - if (s->tls_session_secret_cb != NULL) { - /* - * Indicate that the ticket could not be decrypted rather than - * generating the session from ticket now, trigger abbreviated - * handshake based on external mechanism to calculate the master - * secret later. - */ - return TLS1_TICKET_NOT_DECRYPTED; - } - - return tls_decrypt_ticket(s, &ext_data, alert, ret); -} - -/* tls_decrypt_ticket attempts to decrypt a session ticket. - * - * ticket: a CBS containing the body of the session ticket extension. - * psess: (output) on return, if a ticket was decrypted, then this is set to - * point to the resulting session. - * - * Returns: - * TLS1_TICKET_FATAL_ERROR: error from parsing or decrypting the ticket. - * TLS1_TICKET_NOT_DECRYPTED: the ticket couldn't be decrypted. - * TLS1_TICKET_DECRYPTED: a ticket was decrypted and *psess was set. - */ -static int -tls_decrypt_ticket(SSL *s, CBS *ticket, int *alert, SSL_SESSION **psess) -{ - CBS ticket_name, ticket_iv, ticket_encdata, ticket_hmac; - SSL_SESSION *sess = NULL; - unsigned char *sdec = NULL; - size_t sdec_len = 0; - const unsigned char *p; - unsigned char hmac[EVP_MAX_MD_SIZE]; - HMAC_CTX *hctx = NULL; - EVP_CIPHER_CTX *cctx = NULL; - SSL_CTX *tctx = s->initial_ctx; - int slen, hlen; - int alert_desc = SSL_AD_INTERNAL_ERROR; - int ret = TLS1_TICKET_FATAL_ERROR; - - *psess = NULL; - - if (!CBS_get_bytes(ticket, &ticket_name, 16)) - goto derr; - - /* - * Initialize session ticket encryption and HMAC contexts. - */ - if ((cctx = EVP_CIPHER_CTX_new()) == NULL) - goto err; - if ((hctx = HMAC_CTX_new()) == NULL) - goto err; - - if (tctx->tlsext_ticket_key_cb != NULL) { - int rv; - - /* - * The API guarantees EVP_MAX_IV_LENGTH bytes of space for - * the iv to tlsext_ticket_key_cb(). Since the total space - * required for a session cookie is never less than this, - * this check isn't too strict. The exact check comes later. - */ - if (CBS_len(ticket) < EVP_MAX_IV_LENGTH) - goto derr; - - if ((rv = tctx->tlsext_ticket_key_cb(s, - (unsigned char *)CBS_data(&ticket_name), - (unsigned char *)CBS_data(ticket), cctx, hctx, 0)) < 0) - goto err; - if (rv == 0) - goto derr; - if (rv == 2) { - /* Renew ticket. */ - s->tlsext_ticket_expected = 1; - } - - /* - * Now that the cipher context is initialised, we can extract - * the IV since its length is known. - */ - if (!CBS_get_bytes(ticket, &ticket_iv, - EVP_CIPHER_CTX_iv_length(cctx))) - goto derr; - } else { - /* Check that the key name matches. */ - if (!CBS_mem_equal(&ticket_name, - tctx->tlsext_tick_key_name, - sizeof(tctx->tlsext_tick_key_name))) - goto derr; - if (!CBS_get_bytes(ticket, &ticket_iv, - EVP_CIPHER_iv_length(EVP_aes_128_cbc()))) - goto derr; - if (!EVP_DecryptInit_ex(cctx, EVP_aes_128_cbc(), NULL, - tctx->tlsext_tick_aes_key, CBS_data(&ticket_iv))) - goto err; - if (!HMAC_Init_ex(hctx, tctx->tlsext_tick_hmac_key, - sizeof(tctx->tlsext_tick_hmac_key), EVP_sha256(), - NULL)) - goto err; - } - - /* - * Attempt to process session ticket. - */ - - if ((hlen = HMAC_size(hctx)) < 0) - goto err; - - if (hlen > CBS_len(ticket)) - goto derr; - if (!CBS_get_bytes(ticket, &ticket_encdata, CBS_len(ticket) - hlen)) - goto derr; - if (!CBS_get_bytes(ticket, &ticket_hmac, hlen)) - goto derr; - if (CBS_len(ticket) != 0) { - alert_desc = SSL_AD_DECODE_ERROR; - goto err; - } - - /* Check HMAC of encrypted ticket. */ - if (HMAC_Update(hctx, CBS_data(&ticket_name), - CBS_len(&ticket_name)) <= 0) - goto err; - if (HMAC_Update(hctx, CBS_data(&ticket_iv), - CBS_len(&ticket_iv)) <= 0) - goto err; - if (HMAC_Update(hctx, CBS_data(&ticket_encdata), - CBS_len(&ticket_encdata)) <= 0) - goto err; - if (HMAC_Final(hctx, hmac, &hlen) <= 0) - goto err; - - if (!CBS_mem_equal(&ticket_hmac, hmac, hlen)) - goto derr; - - /* Attempt to decrypt session data. */ - sdec_len = CBS_len(&ticket_encdata); - if ((sdec = calloc(1, sdec_len)) == NULL) - goto err; - if (EVP_DecryptUpdate(cctx, sdec, &slen, CBS_data(&ticket_encdata), - CBS_len(&ticket_encdata)) <= 0) - goto derr; - if (EVP_DecryptFinal_ex(cctx, sdec + slen, &hlen) <= 0) - goto derr; - - slen += hlen; - - /* - * For session parse failures, indicate that we need to send a new - * ticket. - */ - p = sdec; - if ((sess = d2i_SSL_SESSION(NULL, &p, slen)) == NULL) - goto derr; - *psess = sess; - sess = NULL; - - ret = TLS1_TICKET_DECRYPTED; - goto done; - - derr: - ERR_clear_error(); - s->tlsext_ticket_expected = 1; - ret = TLS1_TICKET_NOT_DECRYPTED; - goto done; - - err: - *alert = alert_desc; - ret = TLS1_TICKET_FATAL_ERROR; - goto done; - - done: - freezero(sdec, sdec_len); - EVP_CIPHER_CTX_free(cctx); - HMAC_CTX_free(hctx); - SSL_SESSION_free(sess); - - return ret; -} -- cgit v1.2.3-55-g6feb