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openssl.c
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openssl.c
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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) Daniel Stenberg, <[email protected]>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* SPDX-License-Identifier: curl
*
***************************************************************************/
/*
* Source file for all OpenSSL-specific code for the TLS/SSL layer. No code
* but vtls.c should ever call or use these functions.
*/
#include "curl_setup.h"
#if defined(USE_QUICHE) || defined(USE_OPENSSL)
#include <limits.h>
/* Wincrypt must be included before anything that could include OpenSSL. */
#if defined(USE_WIN32_CRYPTO)
#include <wincrypt.h>
/* Undefine wincrypt conflicting symbols for BoringSSL. */
#undef X509_NAME
#undef X509_EXTENSIONS
#undef PKCS7_ISSUER_AND_SERIAL
#undef PKCS7_SIGNER_INFO
#undef OCSP_REQUEST
#undef OCSP_RESPONSE
#endif
#include "urldata.h"
#include "sendf.h"
#include "formdata.h" /* for the boundary function */
#include "url.h" /* for the ssl config check function */
#include "inet_pton.h"
#include "openssl.h"
#include "connect.h"
#include "slist.h"
#include "select.h"
#include "vtls.h"
#include "vtls_int.h"
#include "vauth/vauth.h"
#include "keylog.h"
#include "strcase.h"
#include "hostcheck.h"
#include "multiif.h"
#include "strerror.h"
#include "curl_printf.h"
#include <openssl/ssl.h>
#include <openssl/rand.h>
#include <openssl/x509v3.h>
#ifndef OPENSSL_NO_DSA
#include <openssl/dsa.h>
#endif
#include <openssl/dh.h>
#include <openssl/err.h>
#include <openssl/md5.h>
#include <openssl/conf.h>
#include <openssl/bn.h>
#include <openssl/rsa.h>
#include <openssl/bio.h>
#include <openssl/buffer.h>
#include <openssl/pkcs12.h>
#include <openssl/tls1.h>
#include <openssl/evp.h>
#if (OPENSSL_VERSION_NUMBER >= 0x0090808fL) && !defined(OPENSSL_NO_OCSP)
#include <openssl/ocsp.h>
#endif
#if (OPENSSL_VERSION_NUMBER >= 0x0090700fL) && /* 0.9.7 or later */ \
!defined(OPENSSL_NO_ENGINE) && !defined(OPENSSL_NO_UI_CONSOLE)
#define USE_OPENSSL_ENGINE
#include <openssl/engine.h>
#endif
#include "warnless.h"
/* The last #include files should be: */
#include "curl_memory.h"
#include "memdebug.h"
#ifndef ARRAYSIZE
#define ARRAYSIZE(A) (sizeof(A)/sizeof((A)[0]))
#endif
/* Uncomment the ALLOW_RENEG line to a real #define if you want to allow TLS
renegotiations when built with BoringSSL. Renegotiating is non-compliant
with HTTP/2 and "an extremely dangerous protocol feature". Beware.
#define ALLOW_RENEG 1
*/
#ifndef OPENSSL_VERSION_NUMBER
#error "OPENSSL_VERSION_NUMBER not defined"
#endif
#ifdef USE_OPENSSL_ENGINE
#include <openssl/ui.h>
#endif
#if OPENSSL_VERSION_NUMBER >= 0x00909000L
#define SSL_METHOD_QUAL const
#else
#define SSL_METHOD_QUAL
#endif
#if (OPENSSL_VERSION_NUMBER >= 0x10000000L)
#define HAVE_ERR_REMOVE_THREAD_STATE 1
#endif
#if (OPENSSL_VERSION_NUMBER >= 0x10100000L) && /* OpenSSL 1.1.0+ */ \
!(defined(LIBRESSL_VERSION_NUMBER) && \
LIBRESSL_VERSION_NUMBER < 0x20700000L)
#define SSLEAY_VERSION_NUMBER OPENSSL_VERSION_NUMBER
#define HAVE_X509_GET0_EXTENSIONS 1 /* added in 1.1.0 -pre1 */
#define HAVE_OPAQUE_EVP_PKEY 1 /* since 1.1.0 -pre3 */
#define HAVE_OPAQUE_RSA_DSA_DH 1 /* since 1.1.0 -pre5 */
#define CONST_EXTS const
#define HAVE_ERR_REMOVE_THREAD_STATE_DEPRECATED 1
/* funny typecast define due to difference in API */
#ifdef LIBRESSL_VERSION_NUMBER
#define ARG2_X509_signature_print (X509_ALGOR *)
#else
#define ARG2_X509_signature_print
#endif
#else
/* For OpenSSL before 1.1.0 */
#define ASN1_STRING_get0_data(x) ASN1_STRING_data(x)
#define X509_get0_notBefore(x) X509_get_notBefore(x)
#define X509_get0_notAfter(x) X509_get_notAfter(x)
#define CONST_EXTS /* nope */
#ifndef LIBRESSL_VERSION_NUMBER
#define OpenSSL_version_num() SSLeay()
#endif
#endif
#if (OPENSSL_VERSION_NUMBER >= 0x1000200fL) && /* 1.0.2 or later */ \
!(defined(LIBRESSL_VERSION_NUMBER) && \
LIBRESSL_VERSION_NUMBER < 0x20700000L)
#define HAVE_X509_GET0_SIGNATURE 1
#endif
#if (OPENSSL_VERSION_NUMBER >= 0x1000200fL) /* 1.0.2 or later */
#define HAVE_SSL_GET_SHUTDOWN 1
#endif
#if OPENSSL_VERSION_NUMBER >= 0x10002003L && \
OPENSSL_VERSION_NUMBER <= 0x10002FFFL && \
!defined(OPENSSL_NO_COMP)
#define HAVE_SSL_COMP_FREE_COMPRESSION_METHODS 1
#endif
#if (OPENSSL_VERSION_NUMBER < 0x0090808fL)
/* not present in older OpenSSL */
#define OPENSSL_load_builtin_modules(x)
#endif
#if (OPENSSL_VERSION_NUMBER >= 0x30000000L)
#define HAVE_EVP_PKEY_GET_PARAMS 1
#endif
#ifdef HAVE_EVP_PKEY_GET_PARAMS
#include <openssl/core_names.h>
#define DECLARE_PKEY_PARAM_BIGNUM(name) BIGNUM *name = NULL
#define FREE_PKEY_PARAM_BIGNUM(name) BN_clear_free(name)
#else
#define DECLARE_PKEY_PARAM_BIGNUM(name) const BIGNUM *name
#define FREE_PKEY_PARAM_BIGNUM(name)
#endif
/*
* Whether SSL_CTX_set_keylog_callback is available.
* OpenSSL: supported since 1.1.1 https://github.com/openssl/openssl/pull/2287
* BoringSSL: supported since d28f59c27bac (committed 2015-11-19)
* LibreSSL: supported since 3.5.0 (released 2022-02-24)
*/
#if (OPENSSL_VERSION_NUMBER >= 0x10101000L && \
!defined(LIBRESSL_VERSION_NUMBER)) || \
(defined(LIBRESSL_VERSION_NUMBER) && \
LIBRESSL_VERSION_NUMBER >= 0x3050000fL) || \
defined(OPENSSL_IS_BORINGSSL)
#define HAVE_KEYLOG_CALLBACK
#endif
/* Whether SSL_CTX_set_ciphersuites is available.
* OpenSSL: supported since 1.1.1 (commit a53b5be6a05)
* BoringSSL: no
* LibreSSL: supported since 3.4.1 (released 2021-10-14)
*/
#if ((OPENSSL_VERSION_NUMBER >= 0x10101000L && \
!defined(LIBRESSL_VERSION_NUMBER)) || \
(defined(LIBRESSL_VERSION_NUMBER) && \
LIBRESSL_VERSION_NUMBER >= 0x3040100fL)) && \
!defined(OPENSSL_IS_BORINGSSL)
#define HAVE_SSL_CTX_SET_CIPHERSUITES
#if !defined(OPENSSL_IS_AWSLC)
#define HAVE_SSL_CTX_SET_POST_HANDSHAKE_AUTH
#endif
#endif
/*
* Whether SSL_CTX_set1_curves_list is available.
* OpenSSL: supported since 1.0.2, see
* https://www.openssl.org/docs/manmaster/man3/SSL_CTX_set1_groups.html
* BoringSSL: supported since 5fd1807d95f7 (committed 2016-09-30)
* LibreSSL: since 2.5.3 (April 12, 2017)
*/
#if (OPENSSL_VERSION_NUMBER >= 0x10002000L) || \
defined(OPENSSL_IS_BORINGSSL)
#define HAVE_SSL_CTX_SET_EC_CURVES
#endif
#if defined(LIBRESSL_VERSION_NUMBER)
#define OSSL_PACKAGE "LibreSSL"
#elif defined(OPENSSL_IS_BORINGSSL)
#define OSSL_PACKAGE "BoringSSL"
#elif defined(OPENSSL_IS_AWSLC)
#define OSSL_PACKAGE "AWS-LC"
#else
# if defined(USE_NGTCP2) && defined(USE_NGHTTP3)
# define OSSL_PACKAGE "quictls"
# else
# define OSSL_PACKAGE "OpenSSL"
#endif
#endif
#if (OPENSSL_VERSION_NUMBER >= 0x10100000L)
/* up2date versions of OpenSSL maintain reasonably secure defaults without
* breaking compatibility, so it is better not to override the defaults in curl
*/
#define DEFAULT_CIPHER_SELECTION NULL
#else
/* ... but it is not the case with old versions of OpenSSL */
#define DEFAULT_CIPHER_SELECTION \
"ALL:!EXPORT:!EXPORT40:!EXPORT56:!aNULL:!LOW:!RC4:@STRENGTH"
#endif
#ifdef HAVE_OPENSSL_SRP
/* the function exists */
#ifdef USE_TLS_SRP
/* the functionality is not disabled */
#define USE_OPENSSL_SRP
#endif
#endif
#if (OPENSSL_VERSION_NUMBER >= 0x10100000L)
#define HAVE_RANDOM_INIT_BY_DEFAULT 1
#endif
#if (OPENSSL_VERSION_NUMBER >= 0x10100000L) && \
!(defined(LIBRESSL_VERSION_NUMBER) && \
LIBRESSL_VERSION_NUMBER < 0x2070100fL) && \
!defined(OPENSSL_IS_BORINGSSL) && \
!defined(OPENSSL_IS_AWSLC)
#define HAVE_OPENSSL_VERSION
#endif
#if defined(OPENSSL_IS_BORINGSSL) || defined(OPENSSL_IS_AWSLC)
typedef uint32_t sslerr_t;
#else
typedef unsigned long sslerr_t;
#endif
/*
* Whether the OpenSSL version has the API needed to support sharing an
* X509_STORE between connections. The API is:
* * `X509_STORE_up_ref` -- Introduced: OpenSSL 1.1.0.
*/
#if (OPENSSL_VERSION_NUMBER >= 0x10100000L) /* OpenSSL >= 1.1.0 */
#define HAVE_SSL_X509_STORE_SHARE
#endif
/* What API version do we use? */
#if defined(LIBRESSL_VERSION_NUMBER)
#define USE_PRE_1_1_API (LIBRESSL_VERSION_NUMBER < 0x2070000f)
#else /* !LIBRESSL_VERSION_NUMBER */
#define USE_PRE_1_1_API (OPENSSL_VERSION_NUMBER < 0x10100000L)
#endif /* !LIBRESSL_VERSION_NUMBER */
#define push_certinfo(_label, _num) \
do { \
long info_len = BIO_get_mem_data(mem, &ptr); \
Curl_ssl_push_certinfo_len(data, _num, _label, ptr, info_len); \
if(1 != BIO_reset(mem)) \
break; \
} while(0)
static void pubkey_show(struct Curl_easy *data,
BIO *mem,
int num,
const char *type,
const char *name,
const BIGNUM *bn)
{
char *ptr;
char namebuf[32];
msnprintf(namebuf, sizeof(namebuf), "%s(%s)", type, name);
if(bn)
BN_print(mem, bn);
push_certinfo(namebuf, num);
}
#ifdef HAVE_OPAQUE_RSA_DSA_DH
#define print_pubkey_BN(_type, _name, _num) \
pubkey_show(data, mem, _num, #_type, #_name, _name)
#else
#define print_pubkey_BN(_type, _name, _num) \
do { \
if(_type->_name) { \
pubkey_show(data, mem, _num, #_type, #_name, _type->_name); \
} \
} while(0)
#endif
static int asn1_object_dump(ASN1_OBJECT *a, char *buf, size_t len)
{
int i, ilen;
ilen = (int)len;
if(ilen < 0)
return 1; /* buffer too big */
i = i2t_ASN1_OBJECT(buf, ilen, a);
if(i >= ilen)
return 1; /* buffer too small */
return 0;
}
static void X509V3_ext(struct Curl_easy *data,
int certnum,
CONST_EXTS STACK_OF(X509_EXTENSION) *exts)
{
int i;
if((int)sk_X509_EXTENSION_num(exts) <= 0)
/* no extensions, bail out */
return;
for(i = 0; i < (int)sk_X509_EXTENSION_num(exts); i++) {
ASN1_OBJECT *obj;
X509_EXTENSION *ext = sk_X509_EXTENSION_value(exts, i);
BUF_MEM *biomem;
char namebuf[128];
BIO *bio_out = BIO_new(BIO_s_mem());
if(!bio_out)
return;
obj = X509_EXTENSION_get_object(ext);
asn1_object_dump(obj, namebuf, sizeof(namebuf));
if(!X509V3_EXT_print(bio_out, ext, 0, 0))
ASN1_STRING_print(bio_out, (ASN1_STRING *)X509_EXTENSION_get_data(ext));
BIO_get_mem_ptr(bio_out, &biomem);
Curl_ssl_push_certinfo_len(data, certnum, namebuf, biomem->data,
biomem->length);
BIO_free(bio_out);
}
}
#if defined(OPENSSL_IS_BORINGSSL) || defined(OPENSSL_IS_AWSLC)
typedef size_t numcert_t;
#else
typedef int numcert_t;
#endif
CURLcode Curl_ossl_certchain(struct Curl_easy *data, SSL *ssl)
{
CURLcode result;
STACK_OF(X509) *sk;
int i;
numcert_t numcerts;
BIO *mem;
DEBUGASSERT(ssl);
sk = SSL_get_peer_cert_chain(ssl);
if(!sk) {
return CURLE_OUT_OF_MEMORY;
}
numcerts = sk_X509_num(sk);
result = Curl_ssl_init_certinfo(data, (int)numcerts);
if(result) {
return result;
}
mem = BIO_new(BIO_s_mem());
if(!mem) {
return CURLE_OUT_OF_MEMORY;
}
for(i = 0; i < (int)numcerts; i++) {
ASN1_INTEGER *num;
X509 *x = sk_X509_value(sk, i);
EVP_PKEY *pubkey = NULL;
int j;
char *ptr;
const ASN1_BIT_STRING *psig = NULL;
X509_NAME_print_ex(mem, X509_get_subject_name(x), 0, XN_FLAG_ONELINE);
push_certinfo("Subject", i);
X509_NAME_print_ex(mem, X509_get_issuer_name(x), 0, XN_FLAG_ONELINE);
push_certinfo("Issuer", i);
BIO_printf(mem, "%lx", X509_get_version(x));
push_certinfo("Version", i);
num = X509_get_serialNumber(x);
if(num->type == V_ASN1_NEG_INTEGER)
BIO_puts(mem, "-");
for(j = 0; j < num->length; j++)
BIO_printf(mem, "%02x", num->data[j]);
push_certinfo("Serial Number", i);
#if defined(HAVE_X509_GET0_SIGNATURE) && defined(HAVE_X509_GET0_EXTENSIONS)
{
const X509_ALGOR *sigalg = NULL;
X509_PUBKEY *xpubkey = NULL;
ASN1_OBJECT *pubkeyoid = NULL;
X509_get0_signature(&psig, &sigalg, x);
if(sigalg) {
const ASN1_OBJECT *sigalgoid = NULL;
X509_ALGOR_get0(&sigalgoid, NULL, NULL, sigalg);
i2a_ASN1_OBJECT(mem, sigalgoid);
push_certinfo("Signature Algorithm", i);
}
xpubkey = X509_get_X509_PUBKEY(x);
if(xpubkey) {
X509_PUBKEY_get0_param(&pubkeyoid, NULL, NULL, NULL, xpubkey);
if(pubkeyoid) {
i2a_ASN1_OBJECT(mem, pubkeyoid);
push_certinfo("Public Key Algorithm", i);
}
}
X509V3_ext(data, i, X509_get0_extensions(x));
}
#else
{
/* before OpenSSL 1.0.2 */
X509_CINF *cinf = x->cert_info;
i2a_ASN1_OBJECT(mem, cinf->signature->algorithm);
push_certinfo("Signature Algorithm", i);
i2a_ASN1_OBJECT(mem, cinf->key->algor->algorithm);
push_certinfo("Public Key Algorithm", i);
X509V3_ext(data, i, cinf->extensions);
psig = x->signature;
}
#endif
ASN1_TIME_print(mem, X509_get0_notBefore(x));
push_certinfo("Start date", i);
ASN1_TIME_print(mem, X509_get0_notAfter(x));
push_certinfo("Expire date", i);
pubkey = X509_get_pubkey(x);
if(!pubkey)
infof(data, " Unable to load public key");
else {
int pktype;
#ifdef HAVE_OPAQUE_EVP_PKEY
pktype = EVP_PKEY_id(pubkey);
#else
pktype = pubkey->type;
#endif
switch(pktype) {
case EVP_PKEY_RSA:
{
#ifndef HAVE_EVP_PKEY_GET_PARAMS
RSA *rsa;
#ifdef HAVE_OPAQUE_EVP_PKEY
rsa = EVP_PKEY_get0_RSA(pubkey);
#else
rsa = pubkey->pkey.rsa;
#endif /* HAVE_OPAQUE_EVP_PKEY */
#endif /* !HAVE_EVP_PKEY_GET_PARAMS */
{
#ifdef HAVE_OPAQUE_RSA_DSA_DH
DECLARE_PKEY_PARAM_BIGNUM(n);
DECLARE_PKEY_PARAM_BIGNUM(e);
#ifdef HAVE_EVP_PKEY_GET_PARAMS
EVP_PKEY_get_bn_param(pubkey, OSSL_PKEY_PARAM_RSA_N, &n);
EVP_PKEY_get_bn_param(pubkey, OSSL_PKEY_PARAM_RSA_E, &e);
#else
RSA_get0_key(rsa, &n, &e, NULL);
#endif /* HAVE_EVP_PKEY_GET_PARAMS */
BIO_printf(mem, "%d", n ? BN_num_bits(n) : 0);
#else
BIO_printf(mem, "%d", rsa->n ? BN_num_bits(rsa->n) : 0);
#endif /* HAVE_OPAQUE_RSA_DSA_DH */
push_certinfo("RSA Public Key", i);
print_pubkey_BN(rsa, n, i);
print_pubkey_BN(rsa, e, i);
FREE_PKEY_PARAM_BIGNUM(n);
FREE_PKEY_PARAM_BIGNUM(e);
}
break;
}
case EVP_PKEY_DSA:
{
#ifndef OPENSSL_NO_DSA
#ifndef HAVE_EVP_PKEY_GET_PARAMS
DSA *dsa;
#ifdef HAVE_OPAQUE_EVP_PKEY
dsa = EVP_PKEY_get0_DSA(pubkey);
#else
dsa = pubkey->pkey.dsa;
#endif /* HAVE_OPAQUE_EVP_PKEY */
#endif /* !HAVE_EVP_PKEY_GET_PARAMS */
{
#ifdef HAVE_OPAQUE_RSA_DSA_DH
DECLARE_PKEY_PARAM_BIGNUM(p);
DECLARE_PKEY_PARAM_BIGNUM(q);
DECLARE_PKEY_PARAM_BIGNUM(g);
DECLARE_PKEY_PARAM_BIGNUM(pub_key);
#ifdef HAVE_EVP_PKEY_GET_PARAMS
EVP_PKEY_get_bn_param(pubkey, OSSL_PKEY_PARAM_FFC_P, &p);
EVP_PKEY_get_bn_param(pubkey, OSSL_PKEY_PARAM_FFC_Q, &q);
EVP_PKEY_get_bn_param(pubkey, OSSL_PKEY_PARAM_FFC_G, &g);
EVP_PKEY_get_bn_param(pubkey, OSSL_PKEY_PARAM_PUB_KEY, &pub_key);
#else
DSA_get0_pqg(dsa, &p, &q, &g);
DSA_get0_key(dsa, &pub_key, NULL);
#endif /* HAVE_EVP_PKEY_GET_PARAMS */
#endif /* HAVE_OPAQUE_RSA_DSA_DH */
print_pubkey_BN(dsa, p, i);
print_pubkey_BN(dsa, q, i);
print_pubkey_BN(dsa, g, i);
print_pubkey_BN(dsa, pub_key, i);
FREE_PKEY_PARAM_BIGNUM(p);
FREE_PKEY_PARAM_BIGNUM(q);
FREE_PKEY_PARAM_BIGNUM(g);
FREE_PKEY_PARAM_BIGNUM(pub_key);
}
#endif /* !OPENSSL_NO_DSA */
break;
}
case EVP_PKEY_DH:
{
#ifndef HAVE_EVP_PKEY_GET_PARAMS
DH *dh;
#ifdef HAVE_OPAQUE_EVP_PKEY
dh = EVP_PKEY_get0_DH(pubkey);
#else
dh = pubkey->pkey.dh;
#endif /* HAVE_OPAQUE_EVP_PKEY */
#endif /* !HAVE_EVP_PKEY_GET_PARAMS */
{
#ifdef HAVE_OPAQUE_RSA_DSA_DH
DECLARE_PKEY_PARAM_BIGNUM(p);
DECLARE_PKEY_PARAM_BIGNUM(q);
DECLARE_PKEY_PARAM_BIGNUM(g);
DECLARE_PKEY_PARAM_BIGNUM(pub_key);
#ifdef HAVE_EVP_PKEY_GET_PARAMS
EVP_PKEY_get_bn_param(pubkey, OSSL_PKEY_PARAM_FFC_P, &p);
EVP_PKEY_get_bn_param(pubkey, OSSL_PKEY_PARAM_FFC_Q, &q);
EVP_PKEY_get_bn_param(pubkey, OSSL_PKEY_PARAM_FFC_G, &g);
EVP_PKEY_get_bn_param(pubkey, OSSL_PKEY_PARAM_PUB_KEY, &pub_key);
#else
DH_get0_pqg(dh, &p, &q, &g);
DH_get0_key(dh, &pub_key, NULL);
#endif /* HAVE_EVP_PKEY_GET_PARAMS */
print_pubkey_BN(dh, p, i);
print_pubkey_BN(dh, q, i);
print_pubkey_BN(dh, g, i);
#else
print_pubkey_BN(dh, p, i);
print_pubkey_BN(dh, g, i);
#endif /* HAVE_OPAQUE_RSA_DSA_DH */
print_pubkey_BN(dh, pub_key, i);
FREE_PKEY_PARAM_BIGNUM(p);
FREE_PKEY_PARAM_BIGNUM(q);
FREE_PKEY_PARAM_BIGNUM(g);
FREE_PKEY_PARAM_BIGNUM(pub_key);
}
break;
}
}
EVP_PKEY_free(pubkey);
}
if(psig) {
for(j = 0; j < psig->length; j++)
BIO_printf(mem, "%02x:", psig->data[j]);
push_certinfo("Signature", i);
}
PEM_write_bio_X509(mem, x);
push_certinfo("Cert", i);
}
BIO_free(mem);
return CURLE_OK;
}
#endif /* quiche or OpenSSL */
#ifdef USE_OPENSSL
#if USE_PRE_1_1_API
#if !defined(LIBRESSL_VERSION_NUMBER) || LIBRESSL_VERSION_NUMBER < 0x2070000fL
#define BIO_set_init(x,v) ((x)->init=(v))
#define BIO_get_data(x) ((x)->ptr)
#define BIO_set_data(x,v) ((x)->ptr=(v))
#endif
#define BIO_get_shutdown(x) ((x)->shutdown)
#define BIO_set_shutdown(x,v) ((x)->shutdown=(v))
#endif /* USE_PRE_1_1_API */
static int ossl_bio_cf_create(BIO *bio)
{
BIO_set_shutdown(bio, 1);
BIO_set_init(bio, 1);
#if USE_PRE_1_1_API
bio->num = -1;
#endif
BIO_set_data(bio, NULL);
return 1;
}
static int ossl_bio_cf_destroy(BIO *bio)
{
if(!bio)
return 0;
return 1;
}
static long ossl_bio_cf_ctrl(BIO *bio, int cmd, long num, void *ptr)
{
struct Curl_cfilter *cf = BIO_get_data(bio);
long ret = 1;
(void)cf;
(void)ptr;
switch(cmd) {
case BIO_CTRL_GET_CLOSE:
ret = (long)BIO_get_shutdown(bio);
break;
case BIO_CTRL_SET_CLOSE:
BIO_set_shutdown(bio, (int)num);
break;
case BIO_CTRL_FLUSH:
/* we do no delayed writes, but if we ever would, this
* needs to trigger it. */
ret = 1;
break;
case BIO_CTRL_DUP:
ret = 1;
break;
#ifdef BIO_CTRL_EOF
case BIO_CTRL_EOF:
/* EOF has been reached on input? */
return (!cf->next || !cf->next->connected);
#endif
default:
ret = 0;
break;
}
return ret;
}
static int ossl_bio_cf_out_write(BIO *bio, const char *buf, int blen)
{
struct Curl_cfilter *cf = BIO_get_data(bio);
struct ssl_connect_data *connssl = cf->ctx;
struct ossl_ctx *octx = (struct ossl_ctx *)connssl->backend;
struct Curl_easy *data = CF_DATA_CURRENT(cf);
ssize_t nwritten;
CURLcode result = CURLE_SEND_ERROR;
DEBUGASSERT(data);
nwritten = Curl_conn_cf_send(cf->next, data, buf, blen, &result);
CURL_TRC_CF(data, cf, "ossl_bio_cf_out_write(len=%d) -> %d, err=%d",
blen, (int)nwritten, result);
BIO_clear_retry_flags(bio);
octx->io_result = result;
if(nwritten < 0) {
if(CURLE_AGAIN == result)
BIO_set_retry_write(bio);
}
return (int)nwritten;
}
static int ossl_bio_cf_in_read(BIO *bio, char *buf, int blen)
{
struct Curl_cfilter *cf = BIO_get_data(bio);
struct ssl_connect_data *connssl = cf->ctx;
struct ossl_ctx *octx = (struct ossl_ctx *)connssl->backend;
struct Curl_easy *data = CF_DATA_CURRENT(cf);
ssize_t nread;
CURLcode result = CURLE_RECV_ERROR;
DEBUGASSERT(data);
/* OpenSSL catches this case, so should we. */
if(!buf)
return 0;
nread = Curl_conn_cf_recv(cf->next, data, buf, blen, &result);
CURL_TRC_CF(data, cf, "ossl_bio_cf_in_read(len=%d) -> %d, err=%d",
blen, (int)nread, result);
BIO_clear_retry_flags(bio);
octx->io_result = result;
if(nread < 0) {
if(CURLE_AGAIN == result)
BIO_set_retry_read(bio);
}
else if(nread == 0) {
connssl->peer_closed = TRUE;
}
/* Before returning server replies to the SSL instance, we need
* to have setup the x509 store or verification will fail. */
if(!octx->x509_store_setup) {
result = Curl_ssl_setup_x509_store(cf, data, octx->ssl_ctx);
if(result) {
octx->io_result = result;
return -1;
}
octx->x509_store_setup = TRUE;
}
return (int)nread;
}
#if USE_PRE_1_1_API
static BIO_METHOD ossl_bio_cf_meth_1_0 = {
BIO_TYPE_MEM,
"OpenSSL CF BIO",
ossl_bio_cf_out_write,
ossl_bio_cf_in_read,
NULL, /* puts is never called */
NULL, /* gets is never called */
ossl_bio_cf_ctrl,
ossl_bio_cf_create,
ossl_bio_cf_destroy,
NULL
};
static BIO_METHOD *ossl_bio_cf_method_create(void)
{
return &ossl_bio_cf_meth_1_0;
}
#define ossl_bio_cf_method_free(m) Curl_nop_stmt
#else
static BIO_METHOD *ossl_bio_cf_method_create(void)
{
BIO_METHOD *m = BIO_meth_new(BIO_TYPE_MEM, "OpenSSL CF BIO");
if(m) {
BIO_meth_set_write(m, &ossl_bio_cf_out_write);
BIO_meth_set_read(m, &ossl_bio_cf_in_read);
BIO_meth_set_ctrl(m, &ossl_bio_cf_ctrl);
BIO_meth_set_create(m, &ossl_bio_cf_create);
BIO_meth_set_destroy(m, &ossl_bio_cf_destroy);
}
return m;
}
static void ossl_bio_cf_method_free(BIO_METHOD *m)
{
if(m)
BIO_meth_free(m);
}
#endif
/*
* Number of bytes to read from the random number seed file. This must be
* a finite value (because some entropy "files" like /dev/urandom have
* an infinite length), but must be large enough to provide enough
* entropy to properly seed OpenSSL's PRNG.
*/
#define RAND_LOAD_LENGTH 1024
#ifdef HAVE_KEYLOG_CALLBACK
static void ossl_keylog_callback(const SSL *ssl, const char *line)
{
(void)ssl;
Curl_tls_keylog_write_line(line);
}
#else
/*
* ossl_log_tls12_secret is called by libcurl to make the CLIENT_RANDOMs if the
* OpenSSL being used doesn't have native support for doing that.
*/
static void
ossl_log_tls12_secret(const SSL *ssl, bool *keylog_done)
{
const SSL_SESSION *session = SSL_get_session(ssl);
unsigned char client_random[SSL3_RANDOM_SIZE];
unsigned char master_key[SSL_MAX_MASTER_KEY_LENGTH];
int master_key_length = 0;
if(!session || *keylog_done)
return;
#if OPENSSL_VERSION_NUMBER >= 0x10100000L && \
!(defined(LIBRESSL_VERSION_NUMBER) && \
LIBRESSL_VERSION_NUMBER < 0x20700000L)
/* ssl->s3 is not checked in openssl 1.1.0-pre6, but let's assume that
* we have a valid SSL context if we have a non-NULL session. */
SSL_get_client_random(ssl, client_random, SSL3_RANDOM_SIZE);
master_key_length = (int)
SSL_SESSION_get_master_key(session, master_key, SSL_MAX_MASTER_KEY_LENGTH);
#else
if(ssl->s3 && session->master_key_length > 0) {
master_key_length = session->master_key_length;
memcpy(master_key, session->master_key, session->master_key_length);
memcpy(client_random, ssl->s3->client_random, SSL3_RANDOM_SIZE);
}
#endif
/* The handshake has not progressed sufficiently yet, or this is a TLS 1.3
* session (when curl was built with older OpenSSL headers and running with
* newer OpenSSL runtime libraries). */
if(master_key_length <= 0)
return;
*keylog_done = true;
Curl_tls_keylog_write("CLIENT_RANDOM", client_random,
master_key, master_key_length);
}
#endif /* !HAVE_KEYLOG_CALLBACK */
static const char *SSL_ERROR_to_str(int err)
{
switch(err) {
case SSL_ERROR_NONE:
return "SSL_ERROR_NONE";
case SSL_ERROR_SSL:
return "SSL_ERROR_SSL";
case SSL_ERROR_WANT_READ:
return "SSL_ERROR_WANT_READ";
case SSL_ERROR_WANT_WRITE:
return "SSL_ERROR_WANT_WRITE";
case SSL_ERROR_WANT_X509_LOOKUP:
return "SSL_ERROR_WANT_X509_LOOKUP";
case SSL_ERROR_SYSCALL:
return "SSL_ERROR_SYSCALL";
case SSL_ERROR_ZERO_RETURN:
return "SSL_ERROR_ZERO_RETURN";
case SSL_ERROR_WANT_CONNECT:
return "SSL_ERROR_WANT_CONNECT";
case SSL_ERROR_WANT_ACCEPT:
return "SSL_ERROR_WANT_ACCEPT";
#if defined(SSL_ERROR_WANT_ASYNC)
case SSL_ERROR_WANT_ASYNC:
return "SSL_ERROR_WANT_ASYNC";
#endif
#if defined(SSL_ERROR_WANT_ASYNC_JOB)
case SSL_ERROR_WANT_ASYNC_JOB:
return "SSL_ERROR_WANT_ASYNC_JOB";
#endif
#if defined(SSL_ERROR_WANT_EARLY)
case SSL_ERROR_WANT_EARLY:
return "SSL_ERROR_WANT_EARLY";
#endif
default:
return "SSL_ERROR unknown";
}
}
static size_t ossl_version(char *buffer, size_t size);
/* Return error string for last OpenSSL error
*/
static char *ossl_strerror(unsigned long error, char *buf, size_t size)
{
size_t len;
DEBUGASSERT(size);
*buf = '\0';
len = ossl_version(buf, size);
DEBUGASSERT(len < (size - 2));
if(len < (size - 2)) {
buf += len;
size -= (len + 2);
*buf++ = ':';
*buf++ = ' ';
*buf = '\0';
}
#if defined(OPENSSL_IS_BORINGSSL) || defined(OPENSSL_IS_AWSLC)
ERR_error_string_n((uint32_t)error, buf, size);
#else
ERR_error_string_n(error, buf, size);
#endif
if(!*buf) {
const char *msg = error ? "Unknown error" : "No error";
if(strlen(msg) < size)
strcpy(buf, msg);
}
return buf;
}
static int passwd_callback(char *buf, int num, int encrypting,
void *global_passwd)
{
DEBUGASSERT(0 == encrypting);
if(!encrypting) {
int klen = curlx_uztosi(strlen((char *)global_passwd));
if(num > klen) {
memcpy(buf, global_passwd, klen + 1);
return klen;
}
}
return 0;
}
/*
* rand_enough() returns TRUE if we have seeded the random engine properly.
*/
static bool rand_enough(void)
{
return (0 != RAND_status()) ? TRUE : FALSE;
}
static CURLcode ossl_seed(struct Curl_easy *data)
{
/* This might get called before it has been added to a multi handle */
if(data->multi && data->multi->ssl_seeded)
return CURLE_OK;
if(rand_enough()) {
/* OpenSSL 1.1.0+ should return here */
if(data->multi)
data->multi->ssl_seeded = TRUE;
return CURLE_OK;
}
#ifdef HAVE_RANDOM_INIT_BY_DEFAULT
/* with OpenSSL 1.1.0+, a failed RAND_status is a showstopper */
failf(data, "Insufficient randomness");
return CURLE_SSL_CONNECT_ERROR;
#else
#ifdef RANDOM_FILE
RAND_load_file(RANDOM_FILE, RAND_LOAD_LENGTH);
if(rand_enough())
return CURLE_OK;
#endif
/* fallback to a custom seeding of the PRNG using a hash based on a current
time */
do {
unsigned char randb[64];
size_t len = sizeof(randb);
size_t i, i_max;
for(i = 0, i_max = len / sizeof(struct curltime); i < i_max; ++i) {
struct curltime tv = Curl_now();
Curl_wait_ms(1);
tv.tv_sec *= i + 1;