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ssl_lib.c
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ssl_lib.c
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/*
* Copyright 1995-2022 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 Apache License 2.0 (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_local.h"
#include "internal/e_os.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 <openssl/trace.h>
#include <openssl/core_names.h>
#include "internal/cryptlib.h"
#include "internal/nelem.h"
#include "internal/refcount.h"
#include "internal/ktls.h"
#include "quic/quic_local.h"
static int ssl_undefined_function_3(SSL_CONNECTION *sc, unsigned char *r,
unsigned char *s, size_t t, size_t *u)
{
return ssl_undefined_function(SSL_CONNECTION_GET_SSL(sc));
}
static int ssl_undefined_function_4(SSL_CONNECTION *sc, int r)
{
return ssl_undefined_function(SSL_CONNECTION_GET_SSL(sc));
}
static size_t ssl_undefined_function_5(SSL_CONNECTION *sc, const char *r,
size_t s, unsigned char *t)
{
return ssl_undefined_function(SSL_CONNECTION_GET_SSL(sc));
}
static int ssl_undefined_function_6(int r)
{
return ssl_undefined_function(NULL);
}
static int ssl_undefined_function_7(SSL_CONNECTION *sc, unsigned char *r,
size_t s, const char *t, size_t u,
const unsigned char *v, size_t w, int x)
{
return ssl_undefined_function(SSL_CONNECTION_GET_SSL(sc));
}
static int ssl_undefined_function_8(SSL_CONNECTION *sc)
{
return ssl_undefined_function(SSL_CONNECTION_GET_SSL(sc));
}
SSL3_ENC_METHOD ssl3_undef_enc_method = {
ssl_undefined_function_8,
ssl_undefined_function_3,
ssl_undefined_function_4,
ssl_undefined_function_5,
NULL, /* client_finished_label */
0, /* client_finished_label_len */
NULL, /* server_finished_label */
0, /* server_finished_label_len */
ssl_undefined_function_6,
ssl_undefined_function_7,
};
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);
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;
OSSL_STACK_OF_X509_free(dane->certs);
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_CONNECTION *to, SSL_CONNECTION *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 = &SSL_CONNECTION_GET_CTX(to)->dane;
to->dane.trecs = sk_danetls_record_new_reserve(NULL, num);
if (to->dane.trecs == NULL) {
ERR_raise(ERR_LIB_SSL, ERR_R_CRYPTO_LIB);
return 0;
}
for (i = 0; i < num; ++i) {
danetls_record *t = sk_danetls_record_value(from->dane.trecs, i);
if (SSL_dane_tlsa_add(SSL_CONNECTION_GET_SSL(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) {
ERR_raise(ERR_LIB_SSL, 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)
return -1;
dctx->mdevp = mdevp;
mdord = OPENSSL_realloc(dctx->mdord, n * sizeof(*mdord));
if (mdord == NULL)
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, const 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) {
ERR_raise(ERR_LIB_SSL, SSL_R_DANE_NOT_ENABLED);
return -1;
}
if (ilen < 0 || dlen != (size_t)ilen) {
ERR_raise(ERR_LIB_SSL, SSL_R_DANE_TLSA_BAD_DATA_LENGTH);
return 0;
}
if (usage > DANETLS_USAGE_LAST) {
ERR_raise(ERR_LIB_SSL, SSL_R_DANE_TLSA_BAD_CERTIFICATE_USAGE);
return 0;
}
if (selector > DANETLS_SELECTOR_LAST) {
ERR_raise(ERR_LIB_SSL, SSL_R_DANE_TLSA_BAD_SELECTOR);
return 0;
}
if (mtype != DANETLS_MATCHING_FULL) {
md = tlsa_md_get(dane, mtype);
if (md == NULL) {
ERR_raise(ERR_LIB_SSL, SSL_R_DANE_TLSA_BAD_MATCHING_TYPE);
return 0;
}
}
if (md != NULL && dlen != (size_t)EVP_MD_get_size(md)) {
ERR_raise(ERR_LIB_SSL, SSL_R_DANE_TLSA_BAD_DIGEST_LENGTH);
return 0;
}
if (!data) {
ERR_raise(ERR_LIB_SSL, SSL_R_DANE_TLSA_NULL_DATA);
return 0;
}
if ((t = OPENSSL_zalloc(sizeof(*t))) == NULL)
return -1;
t->usage = usage;
t->selector = selector;
t->mtype = mtype;
t->data = OPENSSL_malloc(dlen);
if (t->data == NULL) {
tlsa_free(t);
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);
ERR_raise(ERR_LIB_SSL, SSL_R_DANE_TLSA_BAD_CERTIFICATE);
return 0;
}
if (X509_get0_pubkey(cert) == NULL) {
tlsa_free(t);
ERR_raise(ERR_LIB_SSL, 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)) {
ERR_raise(ERR_LIB_SSL, ERR_R_CRYPTO_LIB);
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);
ERR_raise(ERR_LIB_SSL, 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);
ERR_raise(ERR_LIB_SSL, ERR_R_CRYPTO_LIB);
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;
}
#if defined(__TANDEM) && defined(OPENSSL_VPROC)
/*
* Define a VPROC function for HP NonStop build ssl library.
* This is used by platform version identification tools.
* Do not inline this procedure or make it static.
*/
# define OPENSSL_VPROC_STRING_(x) x##_SSL
# define OPENSSL_VPROC_STRING(x) OPENSSL_VPROC_STRING_(x)
# define OPENSSL_VPROC_FUNC OPENSSL_VPROC_STRING(OPENSSL_VPROC)
void OPENSSL_VPROC_FUNC(void) {}
#endif
static int clear_record_layer(SSL_CONNECTION *s)
{
int ret;
/* We try and reset both record layers even if one fails */
ret = ssl_set_new_record_layer(s,
SSL_CONNECTION_IS_DTLS(s) ? DTLS_ANY_VERSION
: TLS_ANY_VERSION,
OSSL_RECORD_DIRECTION_READ,
OSSL_RECORD_PROTECTION_LEVEL_NONE,
NULL, 0, NULL, 0, NULL, 0, NULL, 0,
NID_undef, NULL, NULL);
ret &= ssl_set_new_record_layer(s,
SSL_CONNECTION_IS_DTLS(s) ? DTLS_ANY_VERSION
: TLS_ANY_VERSION,
OSSL_RECORD_DIRECTION_WRITE,
OSSL_RECORD_PROTECTION_LEVEL_NONE,
NULL, 0, NULL, 0, NULL, 0, NULL, 0,
NID_undef, NULL, NULL);
/* SSLfatal already called in the event of failure */
return ret;
}
int SSL_clear(SSL *s)
{
if (s->method == NULL) {
ERR_raise(ERR_LIB_SSL, SSL_R_NO_METHOD_SPECIFIED);
return 0;
}
return s->method->ssl_reset(s);
}
int ossl_ssl_connection_reset(SSL *s)
{
SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
if (sc == NULL)
return 0;
if (ssl_clear_bad_session(sc)) {
SSL_SESSION_free(sc->session);
sc->session = NULL;
}
SSL_SESSION_free(sc->psksession);
sc->psksession = NULL;
OPENSSL_free(sc->psksession_id);
sc->psksession_id = NULL;
sc->psksession_id_len = 0;
sc->hello_retry_request = 0;
sc->sent_tickets = 0;
sc->error = 0;
sc->hit = 0;
sc->shutdown = 0;
if (sc->renegotiate) {
ERR_raise(ERR_LIB_SSL, ERR_R_INTERNAL_ERROR);
return 0;
}
ossl_statem_clear(sc);
/* TODO(QUIC): Version handling not yet clear */
sc->version = s->method->version;
sc->client_version = sc->version;
sc->rwstate = SSL_NOTHING;
BUF_MEM_free(sc->init_buf);
sc->init_buf = NULL;
sc->first_packet = 0;
sc->key_update = SSL_KEY_UPDATE_NONE;
memset(sc->ext.compress_certificate_from_peer, 0,
sizeof(sc->ext.compress_certificate_from_peer));
sc->ext.compress_certificate_sent = 0;
EVP_MD_CTX_free(sc->pha_dgst);
sc->pha_dgst = NULL;
/* Reset DANE verification result state */
sc->dane.mdpth = -1;
sc->dane.pdpth = -1;
X509_free(sc->dane.mcert);
sc->dane.mcert = NULL;
sc->dane.mtlsa = NULL;
/* Clear the verification result peername */
X509_VERIFY_PARAM_move_peername(sc->param, NULL);
/* Clear any shared connection state */
OPENSSL_free(sc->shared_sigalgs);
sc->shared_sigalgs = NULL;
sc->shared_sigalgslen = 0;
/*
* Check to see if we were changed into a different method, if so, revert
* back.
*/
if (s->method != SSL_CONNECTION_GET_CTX(sc)->method) {
s->method->ssl_deinit(s);
s->method = SSL_CONNECTION_GET_CTX(sc)->method;
if (!s->method->ssl_init(s))
return 0;
} else {
if (!s->method->ssl_clear(s))
return 0;
}
RECORD_LAYER_clear(&sc->rlayer);
BIO_free(sc->rlayer.rrlnext);
sc->rlayer.rrlnext = NULL;
if (!clear_record_layer(sc))
return 0;
return 1;
}
#ifndef OPENSSL_NO_DEPRECATED_3_0
/** 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;
if (!SSL_CTX_set_ciphersuites(ctx, OSSL_default_ciphersuites())) {
ERR_raise(ERR_LIB_SSL, SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
return 0;
}
sk = ssl_create_cipher_list(ctx,
ctx->tls13_ciphersuites,
&(ctx->cipher_list),
&(ctx->cipher_list_by_id),
OSSL_default_cipher_list(), ctx->cert);
if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0)) {
ERR_raise(ERR_LIB_SSL, SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
return 0;
}
return 1;
}
#endif
SSL *SSL_new(SSL_CTX *ctx)
{
if (ctx == NULL) {
ERR_raise(ERR_LIB_SSL, SSL_R_NULL_SSL_CTX);
return NULL;
}
if (ctx->method == NULL) {
ERR_raise(ERR_LIB_SSL, SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
return NULL;
}
return ctx->method->ssl_new(ctx);
}
int ossl_ssl_init(SSL *ssl, SSL_CTX *ctx, int type)
{
ssl->type = type;
ssl->references = 1;
ssl->lock = CRYPTO_THREAD_lock_new();
if (ssl->lock == NULL)
return 0;
SSL_CTX_up_ref(ctx);
ssl->ctx = ctx;
ssl->method = ctx->method;
if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, ssl, &ssl->ex_data))
return 0;
return 1;
}
SSL *ossl_ssl_connection_new(SSL_CTX *ctx)
{
SSL_CONNECTION *s;
SSL *ssl;
s = OPENSSL_zalloc(sizeof(*s));
if (s == NULL)
return NULL;
ssl = &s->ssl;
if (!ossl_ssl_init(ssl, ctx, SSL_TYPE_SSL_CONNECTION)) {
OPENSSL_free(s);
s = NULL;
goto sslerr;
}
#ifndef OPENSSL_NO_QUIC
/* set the parent (user visible) ssl to self */
s->user_ssl = ssl;
#endif
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->max_early_data = ctx->max_early_data;
s->recv_max_early_data = ctx->recv_max_early_data;
s->num_tickets = ctx->num_tickets;
s->pha_enabled = ctx->pha_enabled;
/* Shallow copy of the ciphersuites stack */
s->tls13_ciphersuites = sk_SSL_CIPHER_dup(ctx->tls13_ciphersuites);
if (s->tls13_ciphersuites == NULL)
goto cerr;
/*
* 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 sslerr;
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->rlayer.record_padding_cb = ctx->record_padding_cb;
s->rlayer.record_padding_arg = ctx->record_padding_arg;
s->rlayer.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 asn1err;
X509_VERIFY_PARAM_inherit(s->param, ctx->param);
s->quiet_shutdown = ctx->quiet_shutdown;
s->ext.max_fragment_len_mode = ctx->ext.max_fragment_len_mode;
s->max_send_fragment = ctx->max_send_fragment;
s->split_send_fragment = ctx->split_send_fragment;
s->max_pipelines = ctx->max_pipelines;
s->rlayer.default_read_buf_len = ctx->default_read_buf_len;
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;
if (ctx->ext.ecpointformats) {
s->ext.ecpointformats =
OPENSSL_memdup(ctx->ext.ecpointformats,
ctx->ext.ecpointformats_len);
if (!s->ext.ecpointformats) {
s->ext.ecpointformats_len = 0;
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) {
s->ext.supportedgroups_len = 0;
goto err;
}
s->ext.supportedgroups_len = ctx->ext.supportedgroups_len;
}
#ifndef OPENSSL_NO_NEXTPROTONEG
s->ext.npn = NULL;
#endif
if (ctx->ext.alpn != NULL) {
s->ext.alpn = OPENSSL_malloc(ctx->ext.alpn_len);
if (s->ext.alpn == NULL) {
s->ext.alpn_len = 0;
goto err;
}
memcpy(s->ext.alpn, ctx->ext.alpn, ctx->ext.alpn_len);
s->ext.alpn_len = 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->key_update = SSL_KEY_UPDATE_NONE;
s->allow_early_data_cb = ctx->allow_early_data_cb;
s->allow_early_data_cb_data = ctx->allow_early_data_cb_data;
if (!ssl->method->ssl_init(ssl))
goto sslerr;
s->server = (ctx->method->ssl_accept == ssl_undefined_function) ? 0 : 1;
if (!SSL_clear(ssl))
goto sslerr;
#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->async_cb = ctx->async_cb;
s->async_cb_arg = ctx->async_cb_arg;
s->job = NULL;
#ifndef OPENSSL_NO_COMP_ALG
memcpy(s->cert_comp_prefs, ctx->cert_comp_prefs, sizeof(s->cert_comp_prefs));
#endif
#ifndef OPENSSL_NO_CT
if (!SSL_set_ct_validation_callback(ssl, ctx->ct_validation_callback,
ctx->ct_validation_callback_arg))
goto sslerr;
#endif
return ssl;
cerr:
ERR_raise(ERR_LIB_SSL, ERR_R_CRYPTO_LIB);
goto err;
asn1err:
ERR_raise(ERR_LIB_SSL, ERR_R_ASN1_LIB);
goto err;
sslerr:
ERR_raise(ERR_LIB_SSL, ERR_R_SSL_LIB);
err:
SSL_free(ssl);
return NULL;
}
int SSL_is_dtls(const SSL *s)
{
SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
if (sc == NULL)
return 0;
return SSL_CONNECTION_IS_DTLS(sc) ? 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 > SSL_MAX_SID_CTX_LENGTH) {
ERR_raise(ERR_LIB_SSL, 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)
{
SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(ssl);
if (sc == NULL)
return 0;
if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) {
ERR_raise(ERR_LIB_SSL, SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
return 0;
}
sc->sid_ctx_length = sid_ctx_len;
memcpy(sc->sid_ctx, sid_ctx, sid_ctx_len);
return 1;
}
int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
{
if (!CRYPTO_THREAD_write_lock(ctx->lock))
return 0;
ctx->generate_session_id = cb;
CRYPTO_THREAD_unlock(ctx->lock);
return 1;
}
int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
{
SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(ssl);
if (sc == NULL || !CRYPTO_THREAD_write_lock(ssl->lock))
return 0;
sc->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;
const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(ssl);
if (sc == NULL || id_len > sizeof(r.session_id))
return 0;
r.ssl_version = sc->version;
r.session_id_length = id_len;
memcpy(r.session_id, id, id_len);
if (!CRYPTO_THREAD_read_lock(sc->session_ctx->lock))