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ssl_lib.c
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/*
* Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
* Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
* Copyright 2005 Nokia. All rights reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include "ssl_locl.h"
#include <openssl/objects.h>
#include <openssl/x509v3.h>
#include <openssl/rand.h>
#include <openssl/ocsp.h>
#include <openssl/dh.h>
#include <openssl/engine.h>
#include <openssl/async.h>
#include <openssl/ct.h>
#include "internal/cryptlib.h"
#include "internal/rand.h"
#include "internal/refcount.h"
const char SSL_version_str[] = OPENSSL_VERSION_TEXT;
SSL3_ENC_METHOD ssl3_undef_enc_method = {
/*
* evil casts, but these functions are only called if there's a library
* bug
*/
(int (*)(SSL *, SSL3_RECORD *, size_t, int))ssl_undefined_function,
(int (*)(SSL *, SSL3_RECORD *, unsigned char *, int))ssl_undefined_function,
ssl_undefined_function,
(int (*)(SSL *, unsigned char *, unsigned char *, size_t, size_t *))
ssl_undefined_function,
(int (*)(SSL *, int))ssl_undefined_function,
(size_t (*)(SSL *, const char *, size_t, unsigned char *))
ssl_undefined_function,
NULL, /* client_finished_label */
0, /* client_finished_label_len */
NULL, /* server_finished_label */
0, /* server_finished_label_len */
(int (*)(int))ssl_undefined_function,
(int (*)(SSL *, unsigned char *, size_t, const char *,
size_t, const unsigned char *, size_t,
int use_context))ssl_undefined_function,
};
struct ssl_async_args {
SSL *s;
void *buf;
size_t num;
enum { READFUNC, WRITEFUNC, OTHERFUNC } type;
union {
int (*func_read) (SSL *, void *, size_t, size_t *);
int (*func_write) (SSL *, const void *, size_t, size_t *);
int (*func_other) (SSL *);
} f;
};
static const struct {
uint8_t mtype;
uint8_t ord;
int nid;
} dane_mds[] = {
{
DANETLS_MATCHING_FULL, 0, NID_undef
},
{
DANETLS_MATCHING_2256, 1, NID_sha256
},
{
DANETLS_MATCHING_2512, 2, NID_sha512
},
};
static int dane_ctx_enable(struct dane_ctx_st *dctx)
{
const EVP_MD **mdevp;
uint8_t *mdord;
uint8_t mdmax = DANETLS_MATCHING_LAST;
int n = ((int)mdmax) + 1; /* int to handle PrivMatch(255) */
size_t i;
if (dctx->mdevp != NULL)
return 1;
mdevp = OPENSSL_zalloc(n * sizeof(*mdevp));
mdord = OPENSSL_zalloc(n * sizeof(*mdord));
if (mdord == NULL || mdevp == NULL) {
OPENSSL_free(mdord);
OPENSSL_free(mdevp);
SSLerr(SSL_F_DANE_CTX_ENABLE, ERR_R_MALLOC_FAILURE);
return 0;
}
/* Install default entries */
for (i = 0; i < OSSL_NELEM(dane_mds); ++i) {
const EVP_MD *md;
if (dane_mds[i].nid == NID_undef ||
(md = EVP_get_digestbynid(dane_mds[i].nid)) == NULL)
continue;
mdevp[dane_mds[i].mtype] = md;
mdord[dane_mds[i].mtype] = dane_mds[i].ord;
}
dctx->mdevp = mdevp;
dctx->mdord = mdord;
dctx->mdmax = mdmax;
return 1;
}
static void dane_ctx_final(struct dane_ctx_st *dctx)
{
OPENSSL_free(dctx->mdevp);
dctx->mdevp = NULL;
OPENSSL_free(dctx->mdord);
dctx->mdord = NULL;
dctx->mdmax = 0;
}
static void tlsa_free(danetls_record *t)
{
if (t == NULL)
return;
OPENSSL_free(t->data);
EVP_PKEY_free(t->spki);
OPENSSL_free(t);
}
static void dane_final(SSL_DANE *dane)
{
sk_danetls_record_pop_free(dane->trecs, tlsa_free);
dane->trecs = NULL;
sk_X509_pop_free(dane->certs, X509_free);
dane->certs = NULL;
X509_free(dane->mcert);
dane->mcert = NULL;
dane->mtlsa = NULL;
dane->mdpth = -1;
dane->pdpth = -1;
}
/*
* dane_copy - Copy dane configuration, sans verification state.
*/
static int ssl_dane_dup(SSL *to, SSL *from)
{
int num;
int i;
if (!DANETLS_ENABLED(&from->dane))
return 1;
num = sk_danetls_record_num(from->dane.trecs);
dane_final(&to->dane);
to->dane.flags = from->dane.flags;
to->dane.dctx = &to->ctx->dane;
to->dane.trecs = sk_danetls_record_new_null();
if (to->dane.trecs == NULL) {
SSLerr(SSL_F_SSL_DANE_DUP, ERR_R_MALLOC_FAILURE);
return 0;
}
if (!sk_danetls_record_reserve(to->dane.trecs, num))
return 0;
for (i = 0; i < num; ++i) {
danetls_record *t = sk_danetls_record_value(from->dane.trecs, i);
if (SSL_dane_tlsa_add(to, t->usage, t->selector, t->mtype,
t->data, t->dlen) <= 0)
return 0;
}
return 1;
}
static int dane_mtype_set(struct dane_ctx_st *dctx,
const EVP_MD *md, uint8_t mtype, uint8_t ord)
{
int i;
if (mtype == DANETLS_MATCHING_FULL && md != NULL) {
SSLerr(SSL_F_DANE_MTYPE_SET, SSL_R_DANE_CANNOT_OVERRIDE_MTYPE_FULL);
return 0;
}
if (mtype > dctx->mdmax) {
const EVP_MD **mdevp;
uint8_t *mdord;
int n = ((int)mtype) + 1;
mdevp = OPENSSL_realloc(dctx->mdevp, n * sizeof(*mdevp));
if (mdevp == NULL) {
SSLerr(SSL_F_DANE_MTYPE_SET, ERR_R_MALLOC_FAILURE);
return -1;
}
dctx->mdevp = mdevp;
mdord = OPENSSL_realloc(dctx->mdord, n * sizeof(*mdord));
if (mdord == NULL) {
SSLerr(SSL_F_DANE_MTYPE_SET, ERR_R_MALLOC_FAILURE);
return -1;
}
dctx->mdord = mdord;
/* Zero-fill any gaps */
for (i = dctx->mdmax + 1; i < mtype; ++i) {
mdevp[i] = NULL;
mdord[i] = 0;
}
dctx->mdmax = mtype;
}
dctx->mdevp[mtype] = md;
/* Coerce ordinal of disabled matching types to 0 */
dctx->mdord[mtype] = (md == NULL) ? 0 : ord;
return 1;
}
static const EVP_MD *tlsa_md_get(SSL_DANE *dane, uint8_t mtype)
{
if (mtype > dane->dctx->mdmax)
return NULL;
return dane->dctx->mdevp[mtype];
}
static int dane_tlsa_add(SSL_DANE *dane,
uint8_t usage,
uint8_t selector,
uint8_t mtype, unsigned char *data, size_t dlen)
{
danetls_record *t;
const EVP_MD *md = NULL;
int ilen = (int)dlen;
int i;
int num;
if (dane->trecs == NULL) {
SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_NOT_ENABLED);
return -1;
}
if (ilen < 0 || dlen != (size_t)ilen) {
SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_DATA_LENGTH);
return 0;
}
if (usage > DANETLS_USAGE_LAST) {
SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_CERTIFICATE_USAGE);
return 0;
}
if (selector > DANETLS_SELECTOR_LAST) {
SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_SELECTOR);
return 0;
}
if (mtype != DANETLS_MATCHING_FULL) {
md = tlsa_md_get(dane, mtype);
if (md == NULL) {
SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_MATCHING_TYPE);
return 0;
}
}
if (md != NULL && dlen != (size_t)EVP_MD_size(md)) {
SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_DIGEST_LENGTH);
return 0;
}
if (!data) {
SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_NULL_DATA);
return 0;
}
if ((t = OPENSSL_zalloc(sizeof(*t))) == NULL) {
SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE);
return -1;
}
t->usage = usage;
t->selector = selector;
t->mtype = mtype;
t->data = OPENSSL_malloc(dlen);
if (t->data == NULL) {
tlsa_free(t);
SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE);
return -1;
}
memcpy(t->data, data, dlen);
t->dlen = dlen;
/* Validate and cache full certificate or public key */
if (mtype == DANETLS_MATCHING_FULL) {
const unsigned char *p = data;
X509 *cert = NULL;
EVP_PKEY *pkey = NULL;
switch (selector) {
case DANETLS_SELECTOR_CERT:
if (!d2i_X509(&cert, &p, ilen) || p < data ||
dlen != (size_t)(p - data)) {
tlsa_free(t);
SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_CERTIFICATE);
return 0;
}
if (X509_get0_pubkey(cert) == NULL) {
tlsa_free(t);
SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_CERTIFICATE);
return 0;
}
if ((DANETLS_USAGE_BIT(usage) & DANETLS_TA_MASK) == 0) {
X509_free(cert);
break;
}
/*
* For usage DANE-TA(2), we support authentication via "2 0 0" TLSA
* records that contain full certificates of trust-anchors that are
* not present in the wire chain. For usage PKIX-TA(0), we augment
* the chain with untrusted Full(0) certificates from DNS, in case
* they are missing from the chain.
*/
if ((dane->certs == NULL &&
(dane->certs = sk_X509_new_null()) == NULL) ||
!sk_X509_push(dane->certs, cert)) {
SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE);
X509_free(cert);
tlsa_free(t);
return -1;
}
break;
case DANETLS_SELECTOR_SPKI:
if (!d2i_PUBKEY(&pkey, &p, ilen) || p < data ||
dlen != (size_t)(p - data)) {
tlsa_free(t);
SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_PUBLIC_KEY);
return 0;
}
/*
* For usage DANE-TA(2), we support authentication via "2 1 0" TLSA
* records that contain full bare keys of trust-anchors that are
* not present in the wire chain.
*/
if (usage == DANETLS_USAGE_DANE_TA)
t->spki = pkey;
else
EVP_PKEY_free(pkey);
break;
}
}
/*-
* Find the right insertion point for the new record.
*
* See crypto/x509/x509_vfy.c. We sort DANE-EE(3) records first, so that
* they can be processed first, as they require no chain building, and no
* expiration or hostname checks. Because DANE-EE(3) is numerically
* largest, this is accomplished via descending sort by "usage".
*
* We also sort in descending order by matching ordinal to simplify
* the implementation of digest agility in the verification code.
*
* The choice of order for the selector is not significant, so we
* use the same descending order for consistency.
*/
num = sk_danetls_record_num(dane->trecs);
for (i = 0; i < num; ++i) {
danetls_record *rec = sk_danetls_record_value(dane->trecs, i);
if (rec->usage > usage)
continue;
if (rec->usage < usage)
break;
if (rec->selector > selector)
continue;
if (rec->selector < selector)
break;
if (dane->dctx->mdord[rec->mtype] > dane->dctx->mdord[mtype])
continue;
break;
}
if (!sk_danetls_record_insert(dane->trecs, t, i)) {
tlsa_free(t);
SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE);
return -1;
}
dane->umask |= DANETLS_USAGE_BIT(usage);
return 1;
}
/*
* Return 0 if there is only one version configured and it was disabled
* at configure time. Return 1 otherwise.
*/
static int ssl_check_allowed_versions(int min_version, int max_version)
{
int minisdtls = 0, maxisdtls = 0;
/* Figure out if we're doing DTLS versions or TLS versions */
if (min_version == DTLS1_BAD_VER
|| min_version >> 8 == DTLS1_VERSION_MAJOR)
minisdtls = 1;
if (max_version == DTLS1_BAD_VER
|| max_version >> 8 == DTLS1_VERSION_MAJOR)
maxisdtls = 1;
/* A wildcard version of 0 could be DTLS or TLS. */
if ((minisdtls && !maxisdtls && max_version != 0)
|| (maxisdtls && !minisdtls && min_version != 0)) {
/* Mixing DTLS and TLS versions will lead to sadness; deny it. */
return 0;
}
if (minisdtls || maxisdtls) {
/* Do DTLS version checks. */
if (min_version == 0)
/* Ignore DTLS1_BAD_VER */
min_version = DTLS1_VERSION;
if (max_version == 0)
max_version = DTLS1_2_VERSION;
#ifdef OPENSSL_NO_DTLS1_2
if (max_version == DTLS1_2_VERSION)
max_version = DTLS1_VERSION;
#endif
#ifdef OPENSSL_NO_DTLS1
if (min_version == DTLS1_VERSION)
min_version = DTLS1_2_VERSION;
#endif
/* Done massaging versions; do the check. */
if (0
#ifdef OPENSSL_NO_DTLS1
|| (DTLS_VERSION_GE(min_version, DTLS1_VERSION)
&& DTLS_VERSION_GE(DTLS1_VERSION, max_version))
#endif
#ifdef OPENSSL_NO_DTLS1_2
|| (DTLS_VERSION_GE(min_version, DTLS1_2_VERSION)
&& DTLS_VERSION_GE(DTLS1_2_VERSION, max_version))
#endif
)
return 0;
} else {
/* Regular TLS version checks. */
if (min_version == 0)
min_version = SSL3_VERSION;
if (max_version == 0)
max_version = TLS1_3_VERSION;
#ifdef OPENSSL_NO_TLS1_3
if (max_version == TLS1_3_VERSION)
max_version = TLS1_2_VERSION;
#endif
#ifdef OPENSSL_NO_TLS1_2
if (max_version == TLS1_2_VERSION)
max_version = TLS1_1_VERSION;
#endif
#ifdef OPENSSL_NO_TLS1_1
if (max_version == TLS1_1_VERSION)
max_version = TLS1_VERSION;
#endif
#ifdef OPENSSL_NO_TLS1
if (max_version == TLS1_VERSION)
max_version = SSL3_VERSION;
#endif
#ifdef OPENSSL_NO_SSL3
if (min_version == SSL3_VERSION)
min_version = TLS1_VERSION;
#endif
#ifdef OPENSSL_NO_TLS1
if (min_version == TLS1_VERSION)
min_version = TLS1_1_VERSION;
#endif
#ifdef OPENSSL_NO_TLS1_1
if (min_version == TLS1_1_VERSION)
min_version = TLS1_2_VERSION;
#endif
#ifdef OPENSSL_NO_TLS1_2
if (min_version == TLS1_2_VERSION)
min_version = TLS1_3_VERSION;
#endif
/* Done massaging versions; do the check. */
if (0
#ifdef OPENSSL_NO_SSL3
|| (min_version <= SSL3_VERSION && SSL3_VERSION <= max_version)
#endif
#ifdef OPENSSL_NO_TLS1
|| (min_version <= TLS1_VERSION && TLS1_VERSION <= max_version)
#endif
#ifdef OPENSSL_NO_TLS1_1
|| (min_version <= TLS1_1_VERSION && TLS1_1_VERSION <= max_version)
#endif
#ifdef OPENSSL_NO_TLS1_2
|| (min_version <= TLS1_2_VERSION && TLS1_2_VERSION <= max_version)
#endif
#ifdef OPENSSL_NO_TLS1_3
|| (min_version <= TLS1_3_VERSION && TLS1_3_VERSION <= max_version)
#endif
)
return 0;
}
return 1;
}
static void clear_ciphers(SSL *s)
{
/* clear the current cipher */
ssl_clear_cipher_ctx(s);
ssl_clear_hash_ctx(&s->read_hash);
ssl_clear_hash_ctx(&s->write_hash);
}
int SSL_clear(SSL *s)
{
if (s->method == NULL) {
SSLerr(SSL_F_SSL_CLEAR, SSL_R_NO_METHOD_SPECIFIED);
return 0;
}
if (ssl_clear_bad_session(s)) {
SSL_SESSION_free(s->session);
s->session = NULL;
}
SSL_SESSION_free(s->psksession);
s->psksession = NULL;
OPENSSL_free(s->psksession_id);
s->psksession_id = NULL;
s->psksession_id_len = 0;
s->error = 0;
s->hit = 0;
s->shutdown = 0;
if (s->renegotiate) {
SSLerr(SSL_F_SSL_CLEAR, ERR_R_INTERNAL_ERROR);
return 0;
}
ossl_statem_clear(s);
s->version = s->method->version;
s->client_version = s->version;
s->rwstate = SSL_NOTHING;
BUF_MEM_free(s->init_buf);
s->init_buf = NULL;
clear_ciphers(s);
s->first_packet = 0;
s->key_update = SSL_KEY_UPDATE_NONE;
/* Reset DANE verification result state */
s->dane.mdpth = -1;
s->dane.pdpth = -1;
X509_free(s->dane.mcert);
s->dane.mcert = NULL;
s->dane.mtlsa = NULL;
/* Clear the verification result peername */
X509_VERIFY_PARAM_move_peername(s->param, NULL);
/*
* Check to see if we were changed into a different method, if so, revert
* back.
*/
if (s->method != s->ctx->method) {
s->method->ssl_free(s);
s->method = s->ctx->method;
if (!s->method->ssl_new(s))
return 0;
} else {
if (!s->method->ssl_clear(s))
return 0;
}
RECORD_LAYER_clear(&s->rlayer);
return 1;
}
/** Used to change an SSL_CTXs default SSL method type */
int SSL_CTX_set_ssl_version(SSL_CTX *ctx, const SSL_METHOD *meth)
{
STACK_OF(SSL_CIPHER) *sk;
ctx->method = meth;
sk = ssl_create_cipher_list(ctx->method, &(ctx->cipher_list),
&(ctx->cipher_list_by_id),
SSL_DEFAULT_CIPHER_LIST, ctx->cert);
if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0)) {
SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION, SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
return (0);
}
return (1);
}
SSL *SSL_new(SSL_CTX *ctx)
{
SSL *s;
if (ctx == NULL) {
SSLerr(SSL_F_SSL_NEW, SSL_R_NULL_SSL_CTX);
return (NULL);
}
if (ctx->method == NULL) {
SSLerr(SSL_F_SSL_NEW, SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
return (NULL);
}
s = OPENSSL_zalloc(sizeof(*s));
if (s == NULL)
goto err;
s->lock = CRYPTO_THREAD_lock_new();
if (s->lock == NULL)
goto err;
/*
* If not using the standard RAND (say for fuzzing), then don't use a
* chained DRBG.
*/
if (RAND_get_rand_method() == RAND_OpenSSL()) {
s->drbg = RAND_DRBG_new(NID_aes_128_ctr, RAND_DRBG_FLAG_CTR_USE_DF,
RAND_DRBG_get0_global());
if (s->drbg == NULL
|| RAND_DRBG_instantiate(s->drbg, NULL, 0) == 0) {
CRYPTO_THREAD_lock_free(s->lock);
goto err;
}
}
RECORD_LAYER_init(&s->rlayer, s);
s->options = ctx->options;
s->dane.flags = ctx->dane.flags;
s->min_proto_version = ctx->min_proto_version;
s->max_proto_version = ctx->max_proto_version;
s->mode = ctx->mode;
s->max_cert_list = ctx->max_cert_list;
s->references = 1;
s->max_early_data = ctx->max_early_data;
/*
* Earlier library versions used to copy the pointer to the CERT, not
* its contents; only when setting new parameters for the per-SSL
* copy, ssl_cert_new would be called (and the direct reference to
* the per-SSL_CTX settings would be lost, but those still were
* indirectly accessed for various purposes, and for that reason they
* used to be known as s->ctx->default_cert). Now we don't look at the
* SSL_CTX's CERT after having duplicated it once.
*/
s->cert = ssl_cert_dup(ctx->cert);
if (s->cert == NULL)
goto err;
RECORD_LAYER_set_read_ahead(&s->rlayer, ctx->read_ahead);
s->msg_callback = ctx->msg_callback;
s->msg_callback_arg = ctx->msg_callback_arg;
s->verify_mode = ctx->verify_mode;
s->not_resumable_session_cb = ctx->not_resumable_session_cb;
s->record_padding_cb = ctx->record_padding_cb;
s->record_padding_arg = ctx->record_padding_arg;
s->block_padding = ctx->block_padding;
s->sid_ctx_length = ctx->sid_ctx_length;
if (!ossl_assert(s->sid_ctx_length <= sizeof s->sid_ctx))
goto err;
memcpy(&s->sid_ctx, &ctx->sid_ctx, sizeof(s->sid_ctx));
s->verify_callback = ctx->default_verify_callback;
s->generate_session_id = ctx->generate_session_id;
s->param = X509_VERIFY_PARAM_new();
if (s->param == NULL)
goto err;
X509_VERIFY_PARAM_inherit(s->param, ctx->param);
s->quiet_shutdown = ctx->quiet_shutdown;
s->max_send_fragment = ctx->max_send_fragment;
s->split_send_fragment = ctx->split_send_fragment;
s->max_pipelines = ctx->max_pipelines;
if (s->max_pipelines > 1)
RECORD_LAYER_set_read_ahead(&s->rlayer, 1);
if (ctx->default_read_buf_len > 0)
SSL_set_default_read_buffer_len(s, ctx->default_read_buf_len);
SSL_CTX_up_ref(ctx);
s->ctx = ctx;
s->ext.debug_cb = 0;
s->ext.debug_arg = NULL;
s->ext.ticket_expected = 0;
s->ext.status_type = ctx->ext.status_type;
s->ext.status_expected = 0;
s->ext.ocsp.ids = NULL;
s->ext.ocsp.exts = NULL;
s->ext.ocsp.resp = NULL;
s->ext.ocsp.resp_len = 0;
SSL_CTX_up_ref(ctx);
s->session_ctx = ctx;
#ifndef OPENSSL_NO_EC
if (ctx->ext.ecpointformats) {
s->ext.ecpointformats =
OPENSSL_memdup(ctx->ext.ecpointformats,
ctx->ext.ecpointformats_len);
if (!s->ext.ecpointformats)
goto err;
s->ext.ecpointformats_len =
ctx->ext.ecpointformats_len;
}
if (ctx->ext.supportedgroups) {
s->ext.supportedgroups =
OPENSSL_memdup(ctx->ext.supportedgroups,
ctx->ext.supportedgroups_len
* sizeof(*ctx->ext.supportedgroups));
if (!s->ext.supportedgroups)
goto err;
s->ext.supportedgroups_len = ctx->ext.supportedgroups_len;
}
#endif
#ifndef OPENSSL_NO_NEXTPROTONEG
s->ext.npn = NULL;
#endif
if (s->ctx->ext.alpn) {
s->ext.alpn = OPENSSL_malloc(s->ctx->ext.alpn_len);
if (s->ext.alpn == NULL)
goto err;
memcpy(s->ext.alpn, s->ctx->ext.alpn, s->ctx->ext.alpn_len);
s->ext.alpn_len = s->ctx->ext.alpn_len;
}
s->verified_chain = NULL;
s->verify_result = X509_V_OK;
s->default_passwd_callback = ctx->default_passwd_callback;
s->default_passwd_callback_userdata = ctx->default_passwd_callback_userdata;
s->method = ctx->method;
s->key_update = SSL_KEY_UPDATE_NONE;
if (!s->method->ssl_new(s))
goto err;
s->server = (ctx->method->ssl_accept == ssl_undefined_function) ? 0 : 1;
if (!SSL_clear(s))
goto err;
if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data))
goto err;
#ifndef OPENSSL_NO_PSK
s->psk_client_callback = ctx->psk_client_callback;
s->psk_server_callback = ctx->psk_server_callback;
#endif
s->psk_find_session_cb = ctx->psk_find_session_cb;
s->psk_use_session_cb = ctx->psk_use_session_cb;
s->job = NULL;
#ifndef OPENSSL_NO_CT
if (!SSL_set_ct_validation_callback(s, ctx->ct_validation_callback,
ctx->ct_validation_callback_arg))
goto err;
#endif
return s;
err:
SSL_free(s);
SSLerr(SSL_F_SSL_NEW, ERR_R_MALLOC_FAILURE);
return NULL;
}
int SSL_is_dtls(const SSL *s)
{
return SSL_IS_DTLS(s) ? 1 : 0;
}
int SSL_up_ref(SSL *s)
{
int i;
if (CRYPTO_UP_REF(&s->references, &i, s->lock) <= 0)
return 0;
REF_PRINT_COUNT("SSL", s);
REF_ASSERT_ISNT(i < 2);
return ((i > 1) ? 1 : 0);
}
int SSL_CTX_set_session_id_context(SSL_CTX *ctx, const unsigned char *sid_ctx,
unsigned int sid_ctx_len)
{
if (sid_ctx_len > sizeof ctx->sid_ctx) {
SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,
SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
return 0;
}
ctx->sid_ctx_length = sid_ctx_len;
memcpy(ctx->sid_ctx, sid_ctx, sid_ctx_len);
return 1;
}
int SSL_set_session_id_context(SSL *ssl, const unsigned char *sid_ctx,
unsigned int sid_ctx_len)
{
if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) {
SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,
SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
return 0;
}
ssl->sid_ctx_length = sid_ctx_len;
memcpy(ssl->sid_ctx, sid_ctx, sid_ctx_len);
return 1;
}
int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
{
CRYPTO_THREAD_write_lock(ctx->lock);
ctx->generate_session_id = cb;
CRYPTO_THREAD_unlock(ctx->lock);
return 1;
}
int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
{
CRYPTO_THREAD_write_lock(ssl->lock);
ssl->generate_session_id = cb;
CRYPTO_THREAD_unlock(ssl->lock);
return 1;
}
int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
unsigned int id_len)
{
/*
* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
* we can "construct" a session to give us the desired check - i.e. to
* find if there's a session in the hash table that would conflict with
* any new session built out of this id/id_len and the ssl_version in use
* by this SSL.
*/
SSL_SESSION r, *p;
if (id_len > sizeof r.session_id)
return 0;
r.ssl_version = ssl->version;
r.session_id_length = id_len;
memcpy(r.session_id, id, id_len);
CRYPTO_THREAD_read_lock(ssl->session_ctx->lock);
p = lh_SSL_SESSION_retrieve(ssl->session_ctx->sessions, &r);
CRYPTO_THREAD_unlock(ssl->session_ctx->lock);
return (p != NULL);
}
int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
{
return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
}
int SSL_set_purpose(SSL *s, int purpose)
{
return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
}
int SSL_CTX_set_trust(SSL_CTX *s, int trust)
{
return X509_VERIFY_PARAM_set_trust(s->param, trust);
}
int SSL_set_trust(SSL *s, int trust)
{
return X509_VERIFY_PARAM_set_trust(s->param, trust);
}
int SSL_set1_host(SSL *s, const char *hostname)
{
return X509_VERIFY_PARAM_set1_host(s->param, hostname, 0);
}
int SSL_add1_host(SSL *s, const char *hostname)
{
return X509_VERIFY_PARAM_add1_host(s->param, hostname, 0);
}
void SSL_set_hostflags(SSL *s, unsigned int flags)
{
X509_VERIFY_PARAM_set_hostflags(s->param, flags);
}
const char *SSL_get0_peername(SSL *s)
{
return X509_VERIFY_PARAM_get0_peername(s->param);
}
int SSL_CTX_dane_enable(SSL_CTX *ctx)
{
return dane_ctx_enable(&ctx->dane);
}
unsigned long SSL_CTX_dane_set_flags(SSL_CTX *ctx, unsigned long flags)
{
unsigned long orig = ctx->dane.flags;
ctx->dane.flags |= flags;
return orig;
}
unsigned long SSL_CTX_dane_clear_flags(SSL_CTX *ctx, unsigned long flags)
{
unsigned long orig = ctx->dane.flags;
ctx->dane.flags &= ~flags;
return orig;
}
int SSL_dane_enable(SSL *s, const char *basedomain)
{
SSL_DANE *dane = &s->dane;
if (s->ctx->dane.mdmax == 0) {
SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_CONTEXT_NOT_DANE_ENABLED);
return 0;
}
if (dane->trecs != NULL) {
SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_DANE_ALREADY_ENABLED);
return 0;
}
/*
* Default SNI name. This rejects empty names, while set1_host below
* accepts them and disables host name checks. To avoid side-effects with
* invalid input, set the SNI name first.
*/
if (s->ext.hostname == NULL) {
if (!SSL_set_tlsext_host_name(s, basedomain)) {
SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_ERROR_SETTING_TLSA_BASE_DOMAIN);
return -1;
}
}
/* Primary RFC6125 reference identifier */
if (!X509_VERIFY_PARAM_set1_host(s->param, basedomain, 0)) {
SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_ERROR_SETTING_TLSA_BASE_DOMAIN);
return -1;
}
dane->mdpth = -1;
dane->pdpth = -1;
dane->dctx = &s->ctx->dane;
dane->trecs = sk_danetls_record_new_null();
if (dane->trecs == NULL) {
SSLerr(SSL_F_SSL_DANE_ENABLE, ERR_R_MALLOC_FAILURE);
return -1;
}
return 1;
}
unsigned long SSL_dane_set_flags(SSL *ssl, unsigned long flags)
{
unsigned long orig = ssl->dane.flags;
ssl->dane.flags |= flags;
return orig;
}
unsigned long SSL_dane_clear_flags(SSL *ssl, unsigned long flags)
{
unsigned long orig = ssl->dane.flags;
ssl->dane.flags &= ~flags;
return orig;
}
int SSL_get0_dane_authority(SSL *s, X509 **mcert, EVP_PKEY **mspki)
{
SSL_DANE *dane = &s->dane;
if (!DANETLS_ENABLED(dane) || s->verify_result != X509_V_OK)
return -1;
if (dane->mtlsa) {
if (mcert)
*mcert = dane->mcert;
if (mspki)