mariadb/vio/viosslfactories.c
Arun Kuruvila c7e68606c0 Bug#21920657: SSL-CA FAILS SILENTLY IF THE PATH CANNOT BE
FOUND

Description:- Failure during the validation of CA
certificate path which is provided as an option for 'ssl-ca'
returns two different errors for YaSSL and OPENSSL.

Analysis:- 'ssl-ca', option used for specifying the ssl ca
certificate path. Failing to validate this certificate with
OPENSSL returns an error, "ERROR 2026 (HY000): SSL
connection error: SSL_CTX_set_default_verify_paths failed".
While YASSL returns "ERROR 2026 (HY000): SSL connection
error: ASN: bad other signature confirmation". Error
returned by the OPENSSL is correct since
"SSL_CTX_load_verify_locations()" returns 0 (in case of
OPENSSL) for the failure and sets error as
"SSL_INITERR_BAD_PATHS". In case of YASSL,
"SSL_CTX_load_verify_locations()" returns an error number
which is less than or equal to 0 in case of error. Error
numbers for YASSL is mentioned in the file,
'extra/yassl/include/openssl/ssl.h'(line no : 292). Also
'ssl-ca' does not accept tilde home directory path
substitution.

Fix:- The condition which checks for the error in the
"SSL_CTX_load_verify_locations()" is changed in order to
accommodate YASSL as well. A logic is written in
"mysql_ssl_set()" in order accept the tilde home directory
path substitution for all ssl options.
2016-03-01 10:17:25 +05:30

376 lines
11 KiB
C

/* Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
#include "vio_priv.h"
#ifdef HAVE_OPENSSL
static my_bool ssl_algorithms_added = FALSE;
static my_bool ssl_error_strings_loaded= FALSE;
/*
Diffie-Hellman key.
Generated using: >openssl dhparam -5 -C 2048
-----BEGIN DH PARAMETERS-----
MIIBCAKCAQEAil36wGZ2TmH6ysA3V1xtP4MKofXx5n88xq/aiybmGnReZMviCPEJ
46+7VCktl/RZ5iaDH1XNG1dVQmznt9pu2G3usU+k1/VB4bQL4ZgW4u0Wzxh9PyXD
glm99I9Xyj4Z5PVE4MyAsxCRGA1kWQpD9/zKAegUBPLNqSo886Uqg9hmn8ksyU9E
BV5eAEciCuawh6V0O+Sj/C3cSfLhgA0GcXp3OqlmcDu6jS5gWjn3LdP1U0duVxMB
h/neTSCSvtce4CAMYMjKNVh9P1nu+2d9ZH2Od2xhRIqMTfAS1KTqF3VmSWzPFCjG
mjxx/bg6bOOjpgZapvB6ABWlWmRmAAWFtwIBBQ==
-----END DH PARAMETERS-----
*/
static unsigned char dh2048_p[]=
{
0x8A, 0x5D, 0xFA, 0xC0, 0x66, 0x76, 0x4E, 0x61, 0xFA, 0xCA, 0xC0, 0x37,
0x57, 0x5C, 0x6D, 0x3F, 0x83, 0x0A, 0xA1, 0xF5, 0xF1, 0xE6, 0x7F, 0x3C,
0xC6, 0xAF, 0xDA, 0x8B, 0x26, 0xE6, 0x1A, 0x74, 0x5E, 0x64, 0xCB, 0xE2,
0x08, 0xF1, 0x09, 0xE3, 0xAF, 0xBB, 0x54, 0x29, 0x2D, 0x97, 0xF4, 0x59,
0xE6, 0x26, 0x83, 0x1F, 0x55, 0xCD, 0x1B, 0x57, 0x55, 0x42, 0x6C, 0xE7,
0xB7, 0xDA, 0x6E, 0xD8, 0x6D, 0xEE, 0xB1, 0x4F, 0xA4, 0xD7, 0xF5, 0x41,
0xE1, 0xB4, 0x0B, 0xE1, 0x98, 0x16, 0xE2, 0xED, 0x16, 0xCF, 0x18, 0x7D,
0x3F, 0x25, 0xC3, 0x82, 0x59, 0xBD, 0xF4, 0x8F, 0x57, 0xCA, 0x3E, 0x19,
0xE4, 0xF5, 0x44, 0xE0, 0xCC, 0x80, 0xB3, 0x10, 0x91, 0x18, 0x0D, 0x64,
0x59, 0x0A, 0x43, 0xF7, 0xFC, 0xCA, 0x01, 0xE8, 0x14, 0x04, 0xF2, 0xCD,
0xA9, 0x2A, 0x3C, 0xF3, 0xA5, 0x2A, 0x83, 0xD8, 0x66, 0x9F, 0xC9, 0x2C,
0xC9, 0x4F, 0x44, 0x05, 0x5E, 0x5E, 0x00, 0x47, 0x22, 0x0A, 0xE6, 0xB0,
0x87, 0xA5, 0x74, 0x3B, 0xE4, 0xA3, 0xFC, 0x2D, 0xDC, 0x49, 0xF2, 0xE1,
0x80, 0x0D, 0x06, 0x71, 0x7A, 0x77, 0x3A, 0xA9, 0x66, 0x70, 0x3B, 0xBA,
0x8D, 0x2E, 0x60, 0x5A, 0x39, 0xF7, 0x2D, 0xD3, 0xF5, 0x53, 0x47, 0x6E,
0x57, 0x13, 0x01, 0x87, 0xF9, 0xDE, 0x4D, 0x20, 0x92, 0xBE, 0xD7, 0x1E,
0xE0, 0x20, 0x0C, 0x60, 0xC8, 0xCA, 0x35, 0x58, 0x7D, 0x3F, 0x59, 0xEE,
0xFB, 0x67, 0x7D, 0x64, 0x7D, 0x8E, 0x77, 0x6C, 0x61, 0x44, 0x8A, 0x8C,
0x4D, 0xF0, 0x12, 0xD4, 0xA4, 0xEA, 0x17, 0x75, 0x66, 0x49, 0x6C, 0xCF,
0x14, 0x28, 0xC6, 0x9A, 0x3C, 0x71, 0xFD, 0xB8, 0x3A, 0x6C, 0xE3, 0xA3,
0xA6, 0x06, 0x5A, 0xA6, 0xF0, 0x7A, 0x00, 0x15, 0xA5, 0x5A, 0x64, 0x66,
0x00, 0x05, 0x85, 0xB7,
};
static unsigned char dh2048_g[]={
0x05,
};
static DH *get_dh2048(void)
{
DH *dh;
if ((dh=DH_new()))
{
dh->p=BN_bin2bn(dh2048_p,sizeof(dh2048_p),NULL);
dh->g=BN_bin2bn(dh2048_g,sizeof(dh2048_g),NULL);
if (! dh->p || ! dh->g)
{
DH_free(dh);
dh=0;
}
}
return(dh);
}
static void
report_errors()
{
unsigned long l;
const char* file;
const char* data;
int line,flags;
DBUG_ENTER("report_errors");
while ((l=ERR_get_error_line_data(&file,&line,&data,&flags)) != 0)
{
#ifndef DBUG_OFF /* Avoid warning */
char buf[200];
DBUG_PRINT("error", ("OpenSSL: %s:%s:%d:%s\n", ERR_error_string(l,buf),
file,line,(flags & ERR_TXT_STRING) ? data : "")) ;
#endif
}
DBUG_VOID_RETURN;
}
static const char*
ssl_error_string[] =
{
"No error",
"Unable to get certificate",
"Unable to get private key",
"Private key does not match the certificate public key",
"SSL_CTX_set_default_verify_paths failed",
"Failed to set ciphers to use",
"SSL_CTX_new failed",
"SSL_CTX_set_tmp_dh failed"
};
const char*
sslGetErrString(enum enum_ssl_init_error e)
{
DBUG_ASSERT(SSL_INITERR_NOERROR < e && e < SSL_INITERR_LASTERR);
return ssl_error_string[e];
}
static int
vio_set_cert_stuff(SSL_CTX *ctx, const char *cert_file, const char *key_file,
enum enum_ssl_init_error* error)
{
DBUG_ENTER("vio_set_cert_stuff");
DBUG_PRINT("enter", ("ctx: 0x%lx cert_file: %s key_file: %s",
(long) ctx, cert_file, key_file));
if (!cert_file && key_file)
cert_file= key_file;
if (!key_file && cert_file)
key_file= cert_file;
if (cert_file &&
SSL_CTX_use_certificate_file(ctx, cert_file, SSL_FILETYPE_PEM) <= 0)
{
*error= SSL_INITERR_CERT;
DBUG_PRINT("error",("%s from file '%s'", sslGetErrString(*error), cert_file));
DBUG_EXECUTE("error", ERR_print_errors_fp(DBUG_FILE););
fprintf(stderr, "SSL error: %s from '%s'\n", sslGetErrString(*error),
cert_file);
fflush(stderr);
DBUG_RETURN(1);
}
if (key_file &&
SSL_CTX_use_PrivateKey_file(ctx, key_file, SSL_FILETYPE_PEM) <= 0)
{
*error= SSL_INITERR_KEY;
DBUG_PRINT("error", ("%s from file '%s'", sslGetErrString(*error), key_file));
DBUG_EXECUTE("error", ERR_print_errors_fp(DBUG_FILE););
fprintf(stderr, "SSL error: %s from '%s'\n", sslGetErrString(*error),
key_file);
fflush(stderr);
DBUG_RETURN(1);
}
/*
If we are using DSA, we can copy the parameters from the private key
Now we know that a key and cert have been set against the SSL context
*/
if (cert_file && !SSL_CTX_check_private_key(ctx))
{
*error= SSL_INITERR_NOMATCH;
DBUG_PRINT("error", ("%s",sslGetErrString(*error)));
DBUG_EXECUTE("error", ERR_print_errors_fp(DBUG_FILE););
fprintf(stderr, "SSL error: %s\n", sslGetErrString(*error));
fflush(stderr);
DBUG_RETURN(1);
}
DBUG_RETURN(0);
}
static void check_ssl_init()
{
if (!ssl_algorithms_added)
{
ssl_algorithms_added= TRUE;
SSL_library_init();
OpenSSL_add_all_algorithms();
}
if (!ssl_error_strings_loaded)
{
ssl_error_strings_loaded= TRUE;
SSL_load_error_strings();
}
}
/************************ VioSSLFd **********************************/
static struct st_VioSSLFd *
new_VioSSLFd(const char *key_file, const char *cert_file,
const char *ca_file, const char *ca_path,
const char *cipher, my_bool is_client_method,
enum enum_ssl_init_error* error)
{
DH *dh;
struct st_VioSSLFd *ssl_fd;
long ssl_ctx_options= SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3;
DBUG_ENTER("new_VioSSLFd");
DBUG_PRINT("enter",
("key_file: '%s' cert_file: '%s' ca_file: '%s' ca_path: '%s' "
"cipher: '%s'",
key_file ? key_file : "NULL",
cert_file ? cert_file : "NULL",
ca_file ? ca_file : "NULL",
ca_path ? ca_path : "NULL",
cipher ? cipher : "NULL"));
check_ssl_init();
if (!(ssl_fd= ((struct st_VioSSLFd*)
my_malloc(sizeof(struct st_VioSSLFd),MYF(0)))))
DBUG_RETURN(0);
if (!(ssl_fd->ssl_context= SSL_CTX_new(is_client_method ?
TLSv1_client_method() :
TLSv1_server_method())))
{
*error= SSL_INITERR_MEMFAIL;
DBUG_PRINT("error", ("%s", sslGetErrString(*error)));
report_errors();
my_free(ssl_fd);
DBUG_RETURN(0);
}
SSL_CTX_set_options(ssl_fd->ssl_context, ssl_ctx_options);
/*
Set the ciphers that can be used
NOTE: SSL_CTX_set_cipher_list will return 0 if
none of the provided ciphers could be selected
*/
if (cipher &&
SSL_CTX_set_cipher_list(ssl_fd->ssl_context, cipher) == 0)
{
*error= SSL_INITERR_CIPHERS;
DBUG_PRINT("error", ("%s", sslGetErrString(*error)));
report_errors();
SSL_CTX_free(ssl_fd->ssl_context);
my_free(ssl_fd);
DBUG_RETURN(0);
}
/* Load certs from the trusted ca */
if (SSL_CTX_load_verify_locations(ssl_fd->ssl_context, ca_file, ca_path) <= 0)
{
DBUG_PRINT("warning", ("SSL_CTX_load_verify_locations failed"));
if (ca_file || ca_path)
{
/* fail only if ca file or ca path were supplied and looking into
them fails. */
*error= SSL_INITERR_BAD_PATHS;
DBUG_PRINT("error", ("SSL_CTX_load_verify_locations failed : %s",
sslGetErrString(*error)));
report_errors();
SSL_CTX_free(ssl_fd->ssl_context);
my_free(ssl_fd);
DBUG_RETURN(0);
}
/* otherwise go use the defaults */
if (SSL_CTX_set_default_verify_paths(ssl_fd->ssl_context) == 0)
{
*error= SSL_INITERR_BAD_PATHS;
DBUG_PRINT("error", ("%s", sslGetErrString(*error)));
report_errors();
SSL_CTX_free(ssl_fd->ssl_context);
my_free(ssl_fd);
DBUG_RETURN(0);
}
}
if (vio_set_cert_stuff(ssl_fd->ssl_context, cert_file, key_file, error))
{
DBUG_PRINT("error", ("vio_set_cert_stuff failed"));
report_errors();
SSL_CTX_free(ssl_fd->ssl_context);
my_free(ssl_fd);
DBUG_RETURN(0);
}
/* DH stuff */
dh= get_dh2048();
if (SSL_CTX_set_tmp_dh(ssl_fd->ssl_context, dh) == 0)
{
*error= SSL_INITERR_DHFAIL;
DBUG_PRINT("error", ("%s", sslGetErrString(*error)));
report_errors();
DH_free(dh);
SSL_CTX_free(ssl_fd->ssl_context);
my_free(ssl_fd);
DBUG_RETURN(0);
}
DH_free(dh);
DBUG_PRINT("exit", ("OK 1"));
DBUG_RETURN(ssl_fd);
}
/************************ VioSSLConnectorFd **********************************/
struct st_VioSSLFd *
new_VioSSLConnectorFd(const char *key_file, const char *cert_file,
const char *ca_file, const char *ca_path,
const char *cipher, enum enum_ssl_init_error* error)
{
struct st_VioSSLFd *ssl_fd;
int verify= SSL_VERIFY_PEER;
/*
Turn off verification of servers certificate if both
ca_file and ca_path is set to NULL
*/
if (ca_file == 0 && ca_path == 0)
verify= SSL_VERIFY_NONE;
if (!(ssl_fd= new_VioSSLFd(key_file, cert_file, ca_file,
ca_path, cipher, TRUE, error)))
{
return 0;
}
/* Init the VioSSLFd as a "connector" ie. the client side */
SSL_CTX_set_verify(ssl_fd->ssl_context, verify, NULL);
return ssl_fd;
}
/************************ VioSSLAcceptorFd **********************************/
struct st_VioSSLFd *
new_VioSSLAcceptorFd(const char *key_file, const char *cert_file,
const char *ca_file, const char *ca_path,
const char *cipher, enum enum_ssl_init_error* error)
{
struct st_VioSSLFd *ssl_fd;
int verify= SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE;
if (!(ssl_fd= new_VioSSLFd(key_file, cert_file, ca_file,
ca_path, cipher, FALSE, error)))
{
return 0;
}
/* Init the the VioSSLFd as a "acceptor" ie. the server side */
/* Set max number of cached sessions, returns the previous size */
SSL_CTX_sess_set_cache_size(ssl_fd->ssl_context, 128);
SSL_CTX_set_verify(ssl_fd->ssl_context, verify, NULL);
/*
Set session_id - an identifier for this server session
Use the ssl_fd pointer
*/
SSL_CTX_set_session_id_context(ssl_fd->ssl_context,
(const unsigned char *)ssl_fd,
sizeof(ssl_fd));
return ssl_fd;
}
void free_vio_ssl_acceptor_fd(struct st_VioSSLFd *fd)
{
SSL_CTX_free(fd->ssl_context);
my_free(fd);
}
#endif /* HAVE_OPENSSL */