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openssl/ssl/ssl_rsa.c
Matt Caswell 56d9134675 Ensure all EVP calls have their returns checked where appropriate 
There are lots of calls to EVP functions from within libssl There were
various places where we should probably check the return value but don't.
This adds these checks.

Reviewed-by: Richard Levitte <levitte@openssl.org>
2015-11-20 15:47:44 +00:00

1029 lines
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/* ssl/ssl_rsa.c */
/* 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.]
*/
#include <stdio.h>
#include "ssl_locl.h"
#include <openssl/bio.h>
#include <openssl/objects.h>
#include <openssl/evp.h>
#include <openssl/x509.h>
#include <openssl/pem.h>
static int ssl_set_cert(CERT *c, X509 *x509);
static int ssl_set_pkey(CERT *c, EVP_PKEY *pkey);
int SSL_use_certificate(SSL *ssl, X509 *x)
{
if (x == NULL) {
SSLerr(SSL_F_SSL_USE_CERTIFICATE, ERR_R_PASSED_NULL_PARAMETER);
return (0);
}
if (!ssl_cert_inst(&ssl->cert)) {
SSLerr(SSL_F_SSL_USE_CERTIFICATE, ERR_R_MALLOC_FAILURE);
return (0);
}
return (ssl_set_cert(ssl->cert, x));
}
#ifndef OPENSSL_NO_STDIO
int SSL_use_certificate_file(SSL *ssl, const char *file, int type)
{
int j;
BIO *in;
int ret = 0;
X509 *x = NULL;
in = BIO_new(BIO_s_file_internal());
if (in == NULL) {
SSLerr(SSL_F_SSL_USE_CERTIFICATE_FILE, ERR_R_BUF_LIB);
goto end;
}
if (BIO_read_filename(in, file) <= 0) {
SSLerr(SSL_F_SSL_USE_CERTIFICATE_FILE, ERR_R_SYS_LIB);
goto end;
}
if (type == SSL_FILETYPE_ASN1) {
j = ERR_R_ASN1_LIB;
x = d2i_X509_bio(in, NULL);
} else if (type == SSL_FILETYPE_PEM) {
j = ERR_R_PEM_LIB;
x = PEM_read_bio_X509(in, NULL, ssl->ctx->default_passwd_callback,
ssl->ctx->default_passwd_callback_userdata);
} else {
SSLerr(SSL_F_SSL_USE_CERTIFICATE_FILE, SSL_R_BAD_SSL_FILETYPE);
goto end;
}
if (x == NULL) {
SSLerr(SSL_F_SSL_USE_CERTIFICATE_FILE, j);
goto end;
}
ret = SSL_use_certificate(ssl, x);
end:
if (x != NULL)
X509_free(x);
if (in != NULL)
BIO_free(in);
return (ret);
}
#endif
int SSL_use_certificate_ASN1(SSL *ssl, const unsigned char *d, int len)
{
X509 *x;
int ret;
x = d2i_X509(NULL, &d, (long)len);
if (x == NULL) {
SSLerr(SSL_F_SSL_USE_CERTIFICATE_ASN1, ERR_R_ASN1_LIB);
return (0);
}
ret = SSL_use_certificate(ssl, x);
X509_free(x);
return (ret);
}
#ifndef OPENSSL_NO_RSA
int SSL_use_RSAPrivateKey(SSL *ssl, RSA *rsa)
{
EVP_PKEY *pkey;
int ret;
if (rsa == NULL) {
SSLerr(SSL_F_SSL_USE_RSAPRIVATEKEY, ERR_R_PASSED_NULL_PARAMETER);
return (0);
}
if (!ssl_cert_inst(&ssl->cert)) {
SSLerr(SSL_F_SSL_USE_RSAPRIVATEKEY, ERR_R_MALLOC_FAILURE);
return (0);
}
if ((pkey = EVP_PKEY_new()) == NULL) {
SSLerr(SSL_F_SSL_USE_RSAPRIVATEKEY, ERR_R_EVP_LIB);
return (0);
}
RSA_up_ref(rsa);
if (EVP_PKEY_assign_RSA(pkey, rsa) <= 0) {
RSA_free(rsa);
return 0;
}
ret = ssl_set_pkey(ssl->cert, pkey);
EVP_PKEY_free(pkey);
return (ret);
}
#endif
static int ssl_set_pkey(CERT *c, EVP_PKEY *pkey)
{
int i;
/*
* Special case for DH: check two DH certificate types for a match. This
* means for DH certificates we must set the certificate first.
*/
if (pkey->type == EVP_PKEY_DH) {
X509 *x;
i = -1;
x = c->pkeys[SSL_PKEY_DH_RSA].x509;
if (x && X509_check_private_key(x, pkey))
i = SSL_PKEY_DH_RSA;
x = c->pkeys[SSL_PKEY_DH_DSA].x509;
if (i == -1 && x && X509_check_private_key(x, pkey))
i = SSL_PKEY_DH_DSA;
ERR_clear_error();
} else
i = ssl_cert_type(NULL, pkey);
if (i < 0) {
SSLerr(SSL_F_SSL_SET_PKEY, SSL_R_UNKNOWN_CERTIFICATE_TYPE);
return (0);
}
if (c->pkeys[i].x509 != NULL) {
EVP_PKEY *pktmp;
pktmp = X509_get_pubkey(c->pkeys[i].x509);
if (pktmp == NULL) {
SSLerr(SSL_F_SSL_SET_PKEY, ERR_R_MALLOC_FAILURE);
EVP_PKEY_free(pktmp);
return 0;
}
/*
* The return code from EVP_PKEY_copy_parameters is deliberately
* ignored. Some EVP_PKEY types cannot do this.
*/
EVP_PKEY_copy_parameters(pktmp, pkey);
EVP_PKEY_free(pktmp);
ERR_clear_error();
#ifndef OPENSSL_NO_RSA
/*
* Don't check the public/private key, this is mostly for smart
* cards.
*/
if ((pkey->type == EVP_PKEY_RSA) &&
(RSA_flags(pkey->pkey.rsa) & RSA_METHOD_FLAG_NO_CHECK)) ;
else
#endif
if (!X509_check_private_key(c->pkeys[i].x509, pkey)) {
X509_free(c->pkeys[i].x509);
c->pkeys[i].x509 = NULL;
return 0;
}
}
if (c->pkeys[i].privatekey != NULL)
EVP_PKEY_free(c->pkeys[i].privatekey);
CRYPTO_add(&pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
c->pkeys[i].privatekey = pkey;
c->key = &(c->pkeys[i]);
c->valid = 0;
return (1);
}
#ifndef OPENSSL_NO_RSA
# ifndef OPENSSL_NO_STDIO
int SSL_use_RSAPrivateKey_file(SSL *ssl, const char *file, int type)
{
int j, ret = 0;
BIO *in;
RSA *rsa = NULL;
in = BIO_new(BIO_s_file_internal());
if (in == NULL) {
SSLerr(SSL_F_SSL_USE_RSAPRIVATEKEY_FILE, ERR_R_BUF_LIB);
goto end;
}
if (BIO_read_filename(in, file) <= 0) {
SSLerr(SSL_F_SSL_USE_RSAPRIVATEKEY_FILE, ERR_R_SYS_LIB);
goto end;
}
if (type == SSL_FILETYPE_ASN1) {
j = ERR_R_ASN1_LIB;
rsa = d2i_RSAPrivateKey_bio(in, NULL);
} else if (type == SSL_FILETYPE_PEM) {
j = ERR_R_PEM_LIB;
rsa = PEM_read_bio_RSAPrivateKey(in, NULL,
ssl->ctx->default_passwd_callback,
ssl->
ctx->default_passwd_callback_userdata);
} else {
SSLerr(SSL_F_SSL_USE_RSAPRIVATEKEY_FILE, SSL_R_BAD_SSL_FILETYPE);
goto end;
}
if (rsa == NULL) {
SSLerr(SSL_F_SSL_USE_RSAPRIVATEKEY_FILE, j);
goto end;
}
ret = SSL_use_RSAPrivateKey(ssl, rsa);
RSA_free(rsa);
end:
if (in != NULL)
BIO_free(in);
return (ret);
}
# endif
int SSL_use_RSAPrivateKey_ASN1(SSL *ssl, unsigned char *d, long len)
{
int ret;
const unsigned char *p;
RSA *rsa;
p = d;
if ((rsa = d2i_RSAPrivateKey(NULL, &p, (long)len)) == NULL) {
SSLerr(SSL_F_SSL_USE_RSAPRIVATEKEY_ASN1, ERR_R_ASN1_LIB);
return (0);
}
ret = SSL_use_RSAPrivateKey(ssl, rsa);
RSA_free(rsa);
return (ret);
}
#endif /* !OPENSSL_NO_RSA */
int SSL_use_PrivateKey(SSL *ssl, EVP_PKEY *pkey)
{
int ret;
if (pkey == NULL) {
SSLerr(SSL_F_SSL_USE_PRIVATEKEY, ERR_R_PASSED_NULL_PARAMETER);
return (0);
}
if (!ssl_cert_inst(&ssl->cert)) {
SSLerr(SSL_F_SSL_USE_PRIVATEKEY, ERR_R_MALLOC_FAILURE);
return (0);
}
ret = ssl_set_pkey(ssl->cert, pkey);
return (ret);
}
#ifndef OPENSSL_NO_STDIO
int SSL_use_PrivateKey_file(SSL *ssl, const char *file, int type)
{
int j, ret = 0;
BIO *in;
EVP_PKEY *pkey = NULL;
in = BIO_new(BIO_s_file_internal());
if (in == NULL) {
SSLerr(SSL_F_SSL_USE_PRIVATEKEY_FILE, ERR_R_BUF_LIB);
goto end;
}
if (BIO_read_filename(in, file) <= 0) {
SSLerr(SSL_F_SSL_USE_PRIVATEKEY_FILE, ERR_R_SYS_LIB);
goto end;
}
if (type == SSL_FILETYPE_PEM) {
j = ERR_R_PEM_LIB;
pkey = PEM_read_bio_PrivateKey(in, NULL,
ssl->ctx->default_passwd_callback,
ssl->
ctx->default_passwd_callback_userdata);
} else if (type == SSL_FILETYPE_ASN1) {
j = ERR_R_ASN1_LIB;
pkey = d2i_PrivateKey_bio(in, NULL);
} else {
SSLerr(SSL_F_SSL_USE_PRIVATEKEY_FILE, SSL_R_BAD_SSL_FILETYPE);
goto end;
}
if (pkey == NULL) {
SSLerr(SSL_F_SSL_USE_PRIVATEKEY_FILE, j);
goto end;
}
ret = SSL_use_PrivateKey(ssl, pkey);
EVP_PKEY_free(pkey);
end:
if (in != NULL)
BIO_free(in);
return (ret);
}
#endif
int SSL_use_PrivateKey_ASN1(int type, SSL *ssl, const unsigned char *d,
long len)
{
int ret;
const unsigned char *p;
EVP_PKEY *pkey;
p = d;
if ((pkey = d2i_PrivateKey(type, NULL, &p, (long)len)) == NULL) {
SSLerr(SSL_F_SSL_USE_PRIVATEKEY_ASN1, ERR_R_ASN1_LIB);
return (0);
}
ret = SSL_use_PrivateKey(ssl, pkey);
EVP_PKEY_free(pkey);
return (ret);
}
int SSL_CTX_use_certificate(SSL_CTX *ctx, X509 *x)
{
if (x == NULL) {
SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE, ERR_R_PASSED_NULL_PARAMETER);
return (0);
}
if (!ssl_cert_inst(&ctx->cert)) {
SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE, ERR_R_MALLOC_FAILURE);
return (0);
}
return (ssl_set_cert(ctx->cert, x));
}
static int ssl_set_cert(CERT *c, X509 *x)
{
EVP_PKEY *pkey;
int i;
pkey = X509_get_pubkey(x);
if (pkey == NULL) {
SSLerr(SSL_F_SSL_SET_CERT, SSL_R_X509_LIB);
return (0);
}
i = ssl_cert_type(x, pkey);
if (i < 0) {
SSLerr(SSL_F_SSL_SET_CERT, SSL_R_UNKNOWN_CERTIFICATE_TYPE);
EVP_PKEY_free(pkey);
return (0);
}
if (c->pkeys[i].privatekey != NULL) {
/*
* The return code from EVP_PKEY_copy_parameters is deliberately
* ignored. Some EVP_PKEY types cannot do this.
*/
EVP_PKEY_copy_parameters(pkey, c->pkeys[i].privatekey);
ERR_clear_error();
#ifndef OPENSSL_NO_RSA
/*
* Don't check the public/private key, this is mostly for smart
* cards.
*/
if ((c->pkeys[i].privatekey->type == EVP_PKEY_RSA) &&
(RSA_flags(c->pkeys[i].privatekey->pkey.rsa) &
RSA_METHOD_FLAG_NO_CHECK)) ;
else
#endif /* OPENSSL_NO_RSA */
if (!X509_check_private_key(x, c->pkeys[i].privatekey)) {
/*
* don't fail for a cert/key mismatch, just free current private
* key (when switching to a different cert & key, first this
* function should be used, then ssl_set_pkey
*/
EVP_PKEY_free(c->pkeys[i].privatekey);
c->pkeys[i].privatekey = NULL;
/* clear error queue */
ERR_clear_error();
}
}
EVP_PKEY_free(pkey);
if (c->pkeys[i].x509 != NULL)
X509_free(c->pkeys[i].x509);
CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
c->pkeys[i].x509 = x;
c->key = &(c->pkeys[i]);
c->valid = 0;
return (1);
}
#ifndef OPENSSL_NO_STDIO
int SSL_CTX_use_certificate_file(SSL_CTX *ctx, const char *file, int type)
{
int j;
BIO *in;
int ret = 0;
X509 *x = NULL;
in = BIO_new(BIO_s_file_internal());
if (in == NULL) {
SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE, ERR_R_BUF_LIB);
goto end;
}
if (BIO_read_filename(in, file) <= 0) {
SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE, ERR_R_SYS_LIB);
goto end;
}
if (type == SSL_FILETYPE_ASN1) {
j = ERR_R_ASN1_LIB;
x = d2i_X509_bio(in, NULL);
} else if (type == SSL_FILETYPE_PEM) {
j = ERR_R_PEM_LIB;
x = PEM_read_bio_X509(in, NULL, ctx->default_passwd_callback,
ctx->default_passwd_callback_userdata);
} else {
SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE, SSL_R_BAD_SSL_FILETYPE);
goto end;
}
if (x == NULL) {
SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE, j);
goto end;
}
ret = SSL_CTX_use_certificate(ctx, x);
end:
if (x != NULL)
X509_free(x);
if (in != NULL)
BIO_free(in);
return (ret);
}
#endif
int SSL_CTX_use_certificate_ASN1(SSL_CTX *ctx, int len,
const unsigned char *d)
{
X509 *x;
int ret;
x = d2i_X509(NULL, &d, (long)len);
if (x == NULL) {
SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_ASN1, ERR_R_ASN1_LIB);
return (0);
}
ret = SSL_CTX_use_certificate(ctx, x);
X509_free(x);
return (ret);
}
#ifndef OPENSSL_NO_RSA
int SSL_CTX_use_RSAPrivateKey(SSL_CTX *ctx, RSA *rsa)
{
int ret;
EVP_PKEY *pkey;
if (rsa == NULL) {
SSLerr(SSL_F_SSL_CTX_USE_RSAPRIVATEKEY, ERR_R_PASSED_NULL_PARAMETER);
return (0);
}
if (!ssl_cert_inst(&ctx->cert)) {
SSLerr(SSL_F_SSL_CTX_USE_RSAPRIVATEKEY, ERR_R_MALLOC_FAILURE);
return (0);
}
if ((pkey = EVP_PKEY_new()) == NULL) {
SSLerr(SSL_F_SSL_CTX_USE_RSAPRIVATEKEY, ERR_R_EVP_LIB);
return (0);
}
RSA_up_ref(rsa);
if (EVP_PKEY_assign_RSA(pkey, rsa) <= 0) {
RSA_free(rsa);
return 0;
}
ret = ssl_set_pkey(ctx->cert, pkey);
EVP_PKEY_free(pkey);
return (ret);
}
# ifndef OPENSSL_NO_STDIO
int SSL_CTX_use_RSAPrivateKey_file(SSL_CTX *ctx, const char *file, int type)
{
int j, ret = 0;
BIO *in;
RSA *rsa = NULL;
in = BIO_new(BIO_s_file_internal());
if (in == NULL) {
SSLerr(SSL_F_SSL_CTX_USE_RSAPRIVATEKEY_FILE, ERR_R_BUF_LIB);
goto end;
}
if (BIO_read_filename(in, file) <= 0) {
SSLerr(SSL_F_SSL_CTX_USE_RSAPRIVATEKEY_FILE, ERR_R_SYS_LIB);
goto end;
}
if (type == SSL_FILETYPE_ASN1) {
j = ERR_R_ASN1_LIB;
rsa = d2i_RSAPrivateKey_bio(in, NULL);
} else if (type == SSL_FILETYPE_PEM) {
j = ERR_R_PEM_LIB;
rsa = PEM_read_bio_RSAPrivateKey(in, NULL,
ctx->default_passwd_callback,
ctx->default_passwd_callback_userdata);
} else {
SSLerr(SSL_F_SSL_CTX_USE_RSAPRIVATEKEY_FILE, SSL_R_BAD_SSL_FILETYPE);
goto end;
}
if (rsa == NULL) {
SSLerr(SSL_F_SSL_CTX_USE_RSAPRIVATEKEY_FILE, j);
goto end;
}
ret = SSL_CTX_use_RSAPrivateKey(ctx, rsa);
RSA_free(rsa);
end:
if (in != NULL)
BIO_free(in);
return (ret);
}
# endif
int SSL_CTX_use_RSAPrivateKey_ASN1(SSL_CTX *ctx, const unsigned char *d,
long len)
{
int ret;
const unsigned char *p;
RSA *rsa;
p = d;
if ((rsa = d2i_RSAPrivateKey(NULL, &p, (long)len)) == NULL) {
SSLerr(SSL_F_SSL_CTX_USE_RSAPRIVATEKEY_ASN1, ERR_R_ASN1_LIB);
return (0);
}
ret = SSL_CTX_use_RSAPrivateKey(ctx, rsa);
RSA_free(rsa);
return (ret);
}
#endif /* !OPENSSL_NO_RSA */
int SSL_CTX_use_PrivateKey(SSL_CTX *ctx, EVP_PKEY *pkey)
{
if (pkey == NULL) {
SSLerr(SSL_F_SSL_CTX_USE_PRIVATEKEY, ERR_R_PASSED_NULL_PARAMETER);
return (0);
}
if (!ssl_cert_inst(&ctx->cert)) {
SSLerr(SSL_F_SSL_CTX_USE_PRIVATEKEY, ERR_R_MALLOC_FAILURE);
return (0);
}
return (ssl_set_pkey(ctx->cert, pkey));
}
#ifndef OPENSSL_NO_STDIO
int SSL_CTX_use_PrivateKey_file(SSL_CTX *ctx, const char *file, int type)
{
int j, ret = 0;
BIO *in;
EVP_PKEY *pkey = NULL;
in = BIO_new(BIO_s_file_internal());
if (in == NULL) {
SSLerr(SSL_F_SSL_CTX_USE_PRIVATEKEY_FILE, ERR_R_BUF_LIB);
goto end;
}
if (BIO_read_filename(in, file) <= 0) {
SSLerr(SSL_F_SSL_CTX_USE_PRIVATEKEY_FILE, ERR_R_SYS_LIB);
goto end;
}
if (type == SSL_FILETYPE_PEM) {
j = ERR_R_PEM_LIB;
pkey = PEM_read_bio_PrivateKey(in, NULL,
ctx->default_passwd_callback,
ctx->default_passwd_callback_userdata);
} else if (type == SSL_FILETYPE_ASN1) {
j = ERR_R_ASN1_LIB;
pkey = d2i_PrivateKey_bio(in, NULL);
} else {
SSLerr(SSL_F_SSL_CTX_USE_PRIVATEKEY_FILE, SSL_R_BAD_SSL_FILETYPE);
goto end;
}
if (pkey == NULL) {
SSLerr(SSL_F_SSL_CTX_USE_PRIVATEKEY_FILE, j);
goto end;
}
ret = SSL_CTX_use_PrivateKey(ctx, pkey);
EVP_PKEY_free(pkey);
end:
if (in != NULL)
BIO_free(in);
return (ret);
}
#endif
int SSL_CTX_use_PrivateKey_ASN1(int type, SSL_CTX *ctx,
const unsigned char *d, long len)
{
int ret;
const unsigned char *p;
EVP_PKEY *pkey;
p = d;
if ((pkey = d2i_PrivateKey(type, NULL, &p, (long)len)) == NULL) {
SSLerr(SSL_F_SSL_CTX_USE_PRIVATEKEY_ASN1, ERR_R_ASN1_LIB);
return (0);
}
ret = SSL_CTX_use_PrivateKey(ctx, pkey);
EVP_PKEY_free(pkey);
return (ret);
}
#ifndef OPENSSL_NO_STDIO
/*
* Read a file that contains our certificate in "PEM" format, possibly
* followed by a sequence of CA certificates that should be sent to the peer
* in the Certificate message.
*/
int SSL_CTX_use_certificate_chain_file(SSL_CTX *ctx, const char *file)
{
BIO *in;
int ret = 0;
X509 *x = NULL;
ERR_clear_error(); /* clear error stack for
* SSL_CTX_use_certificate() */
in = BIO_new(BIO_s_file_internal());
if (in == NULL) {
SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_CHAIN_FILE, ERR_R_BUF_LIB);
goto end;
}
if (BIO_read_filename(in, file) <= 0) {
SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_CHAIN_FILE, ERR_R_SYS_LIB);
goto end;
}
x = PEM_read_bio_X509_AUX(in, NULL, ctx->default_passwd_callback,
ctx->default_passwd_callback_userdata);
if (x == NULL) {
SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_CHAIN_FILE, ERR_R_PEM_LIB);
goto end;
}
ret = SSL_CTX_use_certificate(ctx, x);
if (ERR_peek_error() != 0)
ret = 0; /* Key/certificate mismatch doesn't imply
* ret==0 ... */
if (ret) {
/*
* If we could set up our certificate, now proceed to the CA
* certificates.
*/
X509 *ca;
int r;
unsigned long err;
SSL_CTX_clear_chain_certs(ctx);
while ((ca = PEM_read_bio_X509(in, NULL,
ctx->default_passwd_callback,
ctx->default_passwd_callback_userdata))
!= NULL) {
r = SSL_CTX_add0_chain_cert(ctx, ca);
if (!r) {
X509_free(ca);
ret = 0;
goto end;
}
/*
* Note that we must not free r if it was successfully added to
* the chain (while we must free the main certificate, since its
* reference count is increased by SSL_CTX_use_certificate).
*/
}
/* When the while loop ends, it's usually just EOF. */
err = ERR_peek_last_error();
if (ERR_GET_LIB(err) == ERR_LIB_PEM
&& ERR_GET_REASON(err) == PEM_R_NO_START_LINE)
ERR_clear_error();
else
ret = 0; /* some real error */
}
end:
if (x != NULL)
X509_free(x);
if (in != NULL)
BIO_free(in);
return (ret);
}
#endif
#ifndef OPENSSL_NO_TLSEXT
static int serverinfo_find_extension(const unsigned char *serverinfo,
size_t serverinfo_length,
unsigned int extension_type,
const unsigned char **extension_data,
size_t *extension_length)
{
*extension_data = NULL;
*extension_length = 0;
if (serverinfo == NULL || serverinfo_length == 0)
return -1;
for (;;) {
unsigned int type = 0;
size_t len = 0;
/* end of serverinfo */
if (serverinfo_length == 0)
return 0; /* Extension not found */
/* read 2-byte type field */
if (serverinfo_length < 2)
return -1; /* Error */
type = (serverinfo[0] << 8) + serverinfo[1];
serverinfo += 2;
serverinfo_length -= 2;
/* read 2-byte len field */
if (serverinfo_length < 2)
return -1; /* Error */
len = (serverinfo[0] << 8) + serverinfo[1];
serverinfo += 2;
serverinfo_length -= 2;
if (len > serverinfo_length)
return -1; /* Error */
if (type == extension_type) {
*extension_data = serverinfo;
*extension_length = len;
return 1; /* Success */
}
serverinfo += len;
serverinfo_length -= len;
}
return 0; /* Error */
}
static int serverinfo_srv_parse_cb(SSL *s, unsigned int ext_type,
const unsigned char *in,
size_t inlen, int *al, void *arg)
{
if (inlen != 0) {
*al = SSL_AD_DECODE_ERROR;
return 0;
}
return 1;
}
static int serverinfo_srv_add_cb(SSL *s, unsigned int ext_type,
const unsigned char **out, size_t *outlen,
int *al, void *arg)
{
const unsigned char *serverinfo = NULL;
size_t serverinfo_length = 0;
/* Is there serverinfo data for the chosen server cert? */
if ((ssl_get_server_cert_serverinfo(s, &serverinfo,
&serverinfo_length)) != 0) {
/* Find the relevant extension from the serverinfo */
int retval = serverinfo_find_extension(serverinfo, serverinfo_length,
ext_type, out, outlen);
if (retval == -1) {
*al = SSL_AD_DECODE_ERROR;
return -1; /* Error */
}
if (retval == 0)
return 0; /* No extension found, don't send extension */
return 1; /* Send extension */
}
return -1; /* No serverinfo data found, don't send
* extension */
}
/*
* With a NULL context, this function just checks that the serverinfo data
* parses correctly. With a non-NULL context, it registers callbacks for
* the included extensions.
*/
static int serverinfo_process_buffer(const unsigned char *serverinfo,
size_t serverinfo_length, SSL_CTX *ctx)
{
if (serverinfo == NULL || serverinfo_length == 0)
return 0;
for (;;) {
unsigned int ext_type = 0;
size_t len = 0;
/* end of serverinfo */
if (serverinfo_length == 0)
return 1;
/* read 2-byte type field */
if (serverinfo_length < 2)
return 0;
/* FIXME: check for types we understand explicitly? */
/* Register callbacks for extensions */
ext_type = (serverinfo[0] << 8) + serverinfo[1];
if (ctx && !SSL_CTX_add_server_custom_ext(ctx, ext_type,
serverinfo_srv_add_cb,
NULL, NULL,
serverinfo_srv_parse_cb,
NULL))
return 0;
serverinfo += 2;
serverinfo_length -= 2;
/* read 2-byte len field */
if (serverinfo_length < 2)
return 0;
len = (serverinfo[0] << 8) + serverinfo[1];
serverinfo += 2;
serverinfo_length -= 2;
if (len > serverinfo_length)
return 0;
serverinfo += len;
serverinfo_length -= len;
}
}
int SSL_CTX_use_serverinfo(SSL_CTX *ctx, const unsigned char *serverinfo,
size_t serverinfo_length)
{
if (ctx == NULL || serverinfo == NULL || serverinfo_length == 0) {
SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
if (!serverinfo_process_buffer(serverinfo, serverinfo_length, NULL)) {
SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO, SSL_R_INVALID_SERVERINFO_DATA);
return 0;
}
if (!ssl_cert_inst(&ctx->cert)) {
SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO, ERR_R_MALLOC_FAILURE);
return 0;
}
if (ctx->cert->key == NULL) {
SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO, ERR_R_INTERNAL_ERROR);
return 0;
}
ctx->cert->key->serverinfo = OPENSSL_realloc(ctx->cert->key->serverinfo,
serverinfo_length);
if (ctx->cert->key->serverinfo == NULL) {
SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO, ERR_R_MALLOC_FAILURE);
return 0;
}
memcpy(ctx->cert->key->serverinfo, serverinfo, serverinfo_length);
ctx->cert->key->serverinfo_length = serverinfo_length;
/*
* Now that the serverinfo is validated and stored, go ahead and
* register callbacks.
*/
if (!serverinfo_process_buffer(serverinfo, serverinfo_length, ctx)) {
SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO, SSL_R_INVALID_SERVERINFO_DATA);
return 0;
}
return 1;
}
# ifndef OPENSSL_NO_STDIO
int SSL_CTX_use_serverinfo_file(SSL_CTX *ctx, const char *file)
{
unsigned char *serverinfo = NULL;
size_t serverinfo_length = 0;
unsigned char *extension = 0;
long extension_length = 0;
char *name = NULL;
char *header = NULL;
char namePrefix[] = "SERVERINFO FOR ";
int ret = 0;
BIO *bin = NULL;
size_t num_extensions = 0;
if (ctx == NULL || file == NULL) {
SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE,
ERR_R_PASSED_NULL_PARAMETER);
goto end;
}
bin = BIO_new(BIO_s_file_internal());
if (bin == NULL) {
SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE, ERR_R_BUF_LIB);
goto end;
}
if (BIO_read_filename(bin, file) <= 0) {
SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE, ERR_R_SYS_LIB);
goto end;
}
for (num_extensions = 0;; num_extensions++) {
if (PEM_read_bio(bin, &name, &header, &extension, &extension_length)
== 0) {
/*
* There must be at least one extension in this file
*/
if (num_extensions == 0) {
SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE,
SSL_R_NO_PEM_EXTENSIONS);
goto end;
} else /* End of file, we're done */
break;
}
/* Check that PEM name starts with "BEGIN SERVERINFO FOR " */
if (strlen(name) < strlen(namePrefix)) {
SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE,
SSL_R_PEM_NAME_TOO_SHORT);
goto end;
}
if (strncmp(name, namePrefix, strlen(namePrefix)) != 0) {
SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE,
SSL_R_PEM_NAME_BAD_PREFIX);
goto end;
}
/*
* Check that the decoded PEM data is plausible (valid length field)
*/
if (extension_length < 4
|| (extension[2] << 8) + extension[3] != extension_length - 4) {
SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE, SSL_R_BAD_DATA);
goto end;
}
/* Append the decoded extension to the serverinfo buffer */
serverinfo =
OPENSSL_realloc(serverinfo, serverinfo_length + extension_length);
if (serverinfo == NULL) {
SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE, ERR_R_MALLOC_FAILURE);
goto end;
}
memcpy(serverinfo + serverinfo_length, extension, extension_length);
serverinfo_length += extension_length;
OPENSSL_free(name);
name = NULL;
OPENSSL_free(header);
header = NULL;
OPENSSL_free(extension);
extension = NULL;
}
ret = SSL_CTX_use_serverinfo(ctx, serverinfo, serverinfo_length);
end:
/* SSL_CTX_use_serverinfo makes a local copy of the serverinfo. */
OPENSSL_free(name);
OPENSSL_free(header);
OPENSSL_free(extension);
OPENSSL_free(serverinfo);
if (bin != NULL)
BIO_free(bin);
return ret;
}
# endif /* OPENSSL_NO_STDIO */
#endif /* OPENSSL_NO_TLSEXT */
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