#include "portable.h"
#ifdef HAVE_OPENSSL
#include "ldap_config.h"
#include <stdio.h>
#include <ac/stdlib.h>
#include <ac/errno.h>
#include <ac/socket.h>
#include <ac/string.h>
#include <ac/ctype.h>
#include <ac/time.h>
#include <ac/unistd.h>
#include <ac/param.h>
#include <ac/dirent.h>
#include "ldap-int.h"
#include "ldap-tls.h"
#ifdef HAVE_OPENSSL_SSL_H
#include <openssl/ssl.h>
#include <openssl/x509v3.h>
#include <openssl/err.h>
#include <openssl/rand.h>
#include <openssl/safestack.h>
#elif defined( HAVE_SSL_H )
#include <ssl.h>
#endif
#ifdef __APPLE__
#include <Security/Security.h>
#include <syslog.h>
static int tlso_use_cert_from_keychain( struct ldapoptions *lo );
static X509 *tslo_copy_cert_to_x509(SecCertificateRef inRef);
static OSStatus tslo_create_ca_chain(SSL_CTX* ctx, SecCertificateRef sslCertRef);
static EVP_PKEY *tslo_copy_key_to_evpkey(SecKeyRef inKey);
#endif
typedef SSL_CTX tlso_ctx;
typedef SSL tlso_session;
static int tlso_opt_trace = 1;
static void tlso_report_error( void );
static void tlso_info_cb( const SSL *ssl, int where, int ret );
static int tlso_verify_cb( int ok, X509_STORE_CTX *ctx );
static int tlso_pphrase_cb( char *buf, int bufsize, int verify );
static int tlso_verify_ok( int ok, X509_STORE_CTX *ctx );
static RSA * tlso_tmp_rsa_cb( SSL *ssl, int is_export, int key_length );
EVP_PKEY *SSL_read_PrivateKey(FILE *fp, EVP_PKEY **key, int (*cb)());
static DH * tlso_tmp_dh_cb( SSL *ssl, int is_export, int key_length );
typedef struct dhplist {
struct dhplist *next;
int keylength;
DH *param;
} dhplist;
static dhplist *tlso_dhparams;
static int tlso_seed_PRNG( const char *randfile );
#ifdef LDAP_R_COMPILE
static ldap_pvt_thread_mutex_t tlso_mutexes[CRYPTO_NUM_LOCKS];
static ldap_pvt_thread_mutex_t tlso_dh_mutex;
static void tlso_locking_cb( int mode, int type, const char *file, int line )
{
if ( mode & CRYPTO_LOCK ) {
ldap_pvt_thread_mutex_lock( &tlso_mutexes[type] );
} else {
ldap_pvt_thread_mutex_unlock( &tlso_mutexes[type] );
}
}
static unsigned long tlso_thread_self( void )
{
enum { ok = sizeof( ldap_pvt_thread_t ) <= sizeof( unsigned long ) };
typedef struct { int dummy: ok ? 1 : -1; } Check[ok ? 1 : -1];
return (unsigned long) ldap_pvt_thread_self();
}
static void tlso_thr_init( void )
{
int i;
for( i=0; i< CRYPTO_NUM_LOCKS ; i++ ) {
ldap_pvt_thread_mutex_init( &tlso_mutexes[i] );
}
ldap_pvt_thread_mutex_init( &tlso_dh_mutex );
CRYPTO_set_locking_callback( tlso_locking_cb );
CRYPTO_set_id_callback( tlso_thread_self );
}
#endif
EVP_PKEY *SSL_read_PrivateKey(FILE *fp, EVP_PKEY **key, int (*cb)())
{
EVP_PKEY *rc;
BIO *bioS;
BIO *bioF;
rc = PEM_read_PrivateKey(fp, key, cb, NULL);
if (rc == NULL) {
fseek(fp, 0L, SEEK_SET);
if ((bioS = BIO_new(BIO_s_fd())) == NULL)
return NULL;
BIO_set_fd(bioS, fileno(fp), BIO_NOCLOSE);
if ((bioF = BIO_new(BIO_f_base64())) == NULL) {
BIO_free(bioS);
return NULL;
}
bioS = BIO_push(bioF, bioS);
rc = d2i_PrivateKey_bio(bioS, NULL);
BIO_free_all(bioS);
if (rc == NULL) {
fseek(fp, 0L, SEEK_SET);
if ((bioS = BIO_new(BIO_s_fd())) == NULL)
return NULL;
BIO_set_fd(bioS, fileno(fp), BIO_NOCLOSE);
rc = d2i_PrivateKey_bio(bioS, NULL);
BIO_free(bioS);
}
}
if (rc != NULL && key != NULL) {
if (*key != NULL)
EVP_PKEY_free(*key);
*key = rc;
}
return rc;
}
#define SYSTEM_KEYCHAIN_PATH "/Library/Keychains/System.keychain"
int tlso_pphrase_cb( char *buf, int bufsize, int verify )
{
int len = -1;
struct ldapoptions *lo = LDAP_INT_GLOBAL_OPT();
if (lo->ldo_tls_passphrase != NULL) {
SecKeychainRef keychainRef = NULL;
OSStatus status = SecKeychainOpen( SYSTEM_KEYCHAIN_PATH, &keychainRef );
if ( status != errSecSuccess ) {
Debug( LDAP_DEBUG_ANY, "TLS: SecKeychainOpen failed for keychain %s: %d",
SYSTEM_KEYCHAIN_PATH, (int)status, 0 );
syslog( LOG_ERR, "TLS: SecKeychainOpen failed for keychain %s: %d",
SYSTEM_KEYCHAIN_PATH, (int)status, 0 );
cssmPerror( "SecKeychainOpen", status );
return len;
}
char *keychain_identifier = LDAP_STRDUP(lo->ldo_tls_passphrase);
CFStringRef keychainCFName = CFStringCreateWithCString(NULL, keychain_identifier, kCFStringEncodingUTF8);
if(keychainCFName)
{
CFRange foundRange;
if(CFStringFindWithOptions(keychainCFName, CFSTR("."), CFRangeMake(0, CFStringGetLength(keychainCFName)), kCFCompareCaseInsensitive, &foundRange) == true)
{
CFStringRef itemName = CFStringCreateWithSubstring(NULL, keychainCFName, CFRangeMake(0, foundRange.location));
CFStringRef accountName = CFStringCreateWithSubstring(NULL, keychainCFName, CFRangeMake(foundRange.location + 1, CFStringGetLength(keychainCFName) - foundRange.location));
char *item_name, *account_name;
void *passphraseBytes = nil;
UInt32 passphraseLength = 0;
if(itemName)
{
int length = CFStringGetLength(itemName);
item_name = (char*)calloc(1, length + 1);
CFStringGetCString(itemName, item_name, length +1, kCFStringEncodingUTF8);
}
if(accountName)
{
int length = CFStringGetLength(accountName);
account_name = (char*)calloc(1, length + 1);
CFStringGetCString(accountName, account_name, length +1, kCFStringEncodingUTF8);
}
status = SecKeychainFindGenericPassword(keychainRef,
strlen(item_name),item_name ,
strlen(account_name), account_name,
&passphraseLength, &passphraseBytes, nil);
if(status == 0)
{
if(passphraseLength < bufsize)
{
memcpy(buf, passphraseBytes, passphraseLength);
buf[passphraseLength] ='\0';
len = strlen( buf );
}
SecKeychainItemFreeContent(nil, passphraseBytes);
}
if(item_name)
free(item_name);
if(account_name)
free(account_name);
if(keychain_identifier)
LDAP_FREE(keychain_identifier);
}
}
}
return len;
}
static STACK_OF(X509_NAME) *
tlso_ca_list( char * bundle, char * dir )
{
STACK_OF(X509_NAME) *ca_list = NULL;
if ( bundle ) {
ca_list = SSL_load_client_CA_file( bundle );
}
#if defined(HAVE_DIRENT_H) || defined(dirent)
if ( dir ) {
int freeit = 0;
if ( !ca_list ) {
ca_list = sk_X509_NAME_new_null();
freeit = 1;
}
if ( !SSL_add_dir_cert_subjects_to_stack( ca_list, dir ) &&
freeit ) {
sk_X509_NAME_free( ca_list );
ca_list = NULL;
}
}
#endif
return ca_list;
}
static int
tlso_init( void )
{
struct ldapoptions *lo = LDAP_INT_GLOBAL_OPT();
#ifdef HAVE_EBCDIC
{
char *file = LDAP_STRDUP( lo->ldo_tls_randfile );
if ( file ) __atoe( file );
(void) tlso_seed_PRNG( file );
LDAP_FREE( file );
}
#else
(void) tlso_seed_PRNG( lo->ldo_tls_randfile );
#endif
SSL_load_error_strings();
SSL_library_init();
OpenSSL_add_all_algorithms();
OpenSSL_add_all_digests();
X509V3_add_standard_extensions();
return 0;
}
static void
tlso_destroy( void )
{
struct ldapoptions *lo = LDAP_INT_GLOBAL_OPT();
EVP_cleanup();
ERR_remove_state(0);
ERR_free_strings();
if ( lo->ldo_tls_randfile ) {
LDAP_FREE( lo->ldo_tls_randfile );
lo->ldo_tls_randfile = NULL;
}
if ( lo->ldo_tls_passphrase ) {
memset( lo->ldo_tls_passphrase, 0, strlen(lo->ldo_tls_passphrase));
LDAP_FREE( lo->ldo_tls_passphrase );
lo->ldo_tls_passphrase = NULL;
}
}
static tls_ctx *
tlso_ctx_new( struct ldapoptions *lo )
{
return (tls_ctx *) SSL_CTX_new( SSLv23_method() );
}
static void
tlso_ctx_ref( tls_ctx *ctx )
{
tlso_ctx *c = (tlso_ctx *)ctx;
CRYPTO_add( &c->references, 1, CRYPTO_LOCK_SSL_CTX );
}
static void
tlso_ctx_free ( tls_ctx *ctx )
{
tlso_ctx *c = (tlso_ctx *)ctx;
SSL_CTX_free( c );
}
static int
tlso_ctx_init( struct ldapoptions *lo, struct ldaptls *lt, int is_server )
{
tlso_ctx *ctx = (tlso_ctx *)lo->ldo_tls_ctx;
int i;
if ( is_server ) {
SSL_CTX_set_session_id_context( ctx,
(const unsigned char *) "OpenLDAP", sizeof("OpenLDAP")-1 );
}
if ( lo->ldo_tls_protocol_min > LDAP_OPT_X_TLS_PROTOCOL_SSL3 )
SSL_CTX_set_options( ctx, SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 );
else if ( lo->ldo_tls_protocol_min > LDAP_OPT_X_TLS_PROTOCOL_SSL2 )
SSL_CTX_set_options( ctx, SSL_OP_NO_SSLv2 );
if ( lo->ldo_tls_ciphersuite &&
!SSL_CTX_set_cipher_list( ctx, lt->lt_ciphersuite ) )
{
Debug( LDAP_DEBUG_ANY,
"TLS: could not set cipher list %s.\n",
lo->ldo_tls_ciphersuite, 0, 0 );
tlso_report_error();
return -1;
}
#ifdef __APPLE__
if(lo->ldo_tls_server_ident_ref_name != NULL)
{
OSStatus status = errSecSuccess;
SecIdentityRef sslIdentityRef = NULL;
X509 *x509_cert = NULL;
SecCertificateRef certRef = NULL;
SecKeyRef keyRef = NULL;
EVP_PKEY *pvtKey = NULL;
SecKeychainSetUserInteractionAllowed(false);
SecKeychainSetPreferenceDomain(kSecPreferencesDomainSystem);
sslIdentityRef = SecIdentityCopyPreferred(CFSTR("OPENDIRECTORY_SSL_IDENTITY"), 0, NULL);
if (sslIdentityRef) {
syslog(LOG_DEBUG, "TLS: found identity in keychain using identity preference.");
}
else {
syslog(LOG_DEBUG,
"TLS: failed to find identity in keychain using identity preference. Trying to find identity by name '%s'.",
lo->ldo_tls_server_ident_ref_name);
char *sep = strchr(lo->ldo_tls_server_ident_ref_name, ':');
char *cIdentityName = sep ? sep + 1 : lo->ldo_tls_server_ident_ref_name;
CFStringRef identityName = CFStringCreateWithCString(NULL, cIdentityName, kCFStringEncodingUTF8);
if (!identityName) {
syslog(LOG_NOTICE,
"TLS: failed to create CFString version of identity name %s.",
lo->ldo_tls_server_ident_ref_name);
}
else {
CFMutableDictionaryRef query = CFDictionaryCreateMutable(kCFAllocatorDefault, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
CFDictionaryAddValue(query, kSecClass, kSecClassIdentity);
CFDictionaryAddValue(query, kSecReturnRef, kCFBooleanTrue);
CFDictionaryAddValue(query, kSecMatchLimit, kSecMatchLimitOne);
CFDictionaryAddValue(query, kSecMatchSubjectContains, identityName);
SecKeychainRef keychainRef = NULL;
status = SecKeychainOpen(SYSTEM_KEYCHAIN_PATH, &keychainRef);
if (status == errSecSuccess) {
CFArrayRef searchList = CFArrayCreate(kCFAllocatorDefault, (const void**)&keychainRef, 1, &kCFTypeArrayCallBacks);
if (searchList) {
CFDictionaryAddValue(query, kSecMatchSearchList, searchList);
CFRelease(searchList);
}
}
CFTypeRef results = NULL;
status = SecItemCopyMatching(query, &results);
if(status != noErr) {
syslog(LOG_NOTICE,
"TLS: SecItemCopyMatching returned error %d when searching for identity %s.",
status, lo->ldo_tls_server_ident_ref_name);
}
else if (!results) {
syslog(LOG_NOTICE,
"TLS: failed to find identity using name %s: no results returned.",
lo->ldo_tls_server_ident_ref_name);
}
else {
if (CFGetTypeID(results) == SecIdentityGetTypeID()) {
sslIdentityRef = (SecIdentityRef)results;
CFRetain(sslIdentityRef);
}
else if (CFGetTypeID(results) == CFArrayGetTypeID()) {
if (CFArrayGetCount(results) != 0) {
sslIdentityRef = (SecIdentityRef)CFArrayGetValueAtIndex(results, 0);
CFRetain(sslIdentityRef);
}
else {
syslog(LOG_NOTICE,
"TLS: failed to find identity using name %s: empty array returned.",
lo->ldo_tls_server_ident_ref_name);
}
}
else {
syslog(LOG_DEBUG, "TLS: SecItemCopyMatching returned unhandled type.");
}
}
CFRelease(identityName);
CFRelease(query);
}
if (sslIdentityRef) {
syslog(LOG_DEBUG,
"TLS: found identity in keychain by name '%s'.",
lo->ldo_tls_server_ident_ref_name);
}
else {
syslog(LOG_NOTICE, "TLS: failed to find ssl identity in keychain.");
return LDAP_TLS_KEYCHAIN_CERT_NOTFOUND;
}
}
status = SecIdentityCopyCertificate(sslIdentityRef, &certRef);
if(status)
{
syslog(LOG_NOTICE,
"TLS: could not copy certificate from keychain identity '%s'.",
lo->ldo_tls_server_ident_ref_name);
goto done;
}
x509_cert = tslo_copy_cert_to_x509(certRef);
status = tslo_create_ca_chain(ctx, certRef);
if(status != noErr) {
syslog(LOG_NOTICE,
"TLS: failed to create ca chain for '%s'.",
lo->ldo_tls_server_ident_ref_name);
goto done;
}
if(!SSL_CTX_use_certificate(ctx, x509_cert))
{
syslog(LOG_NOTICE,
"TLS: could not use certificate '%s'.",
lo->ldo_tls_server_ident_ref_name);
tlso_report_error();
status = -1;
goto done;
}
status = SecIdentityCopyPrivateKey(sslIdentityRef, &keyRef);
if(status != noErr)
{
syslog(LOG_NOTICE,
"TLS: could not retrieve pvt key for '%s' from system keychain.",
lo->ldo_tls_server_ident_ref_name);
goto done;
}
pvtKey = tslo_copy_key_to_evpkey(keyRef);
if(!pvtKey)
{
syslog(LOG_NOTICE,
"TLS: could not convert keychain item '%s' to EVP_PKEY.",
lo->ldo_tls_server_ident_ref_name);
tlso_report_error();
status = -1;
goto done;
}
if (!SSL_CTX_use_PrivateKey( lo->ldo_tls_ctx, pvtKey ) )
{
syslog(LOG_NOTICE,
"TLS: could not use pvt key '%s'.",
lo->ldo_tls_server_ident_ref_name);
tlso_report_error();
status = -1;
goto done;
}
if (!SSL_CTX_check_private_key(lo->ldo_tls_ctx) )
{
syslog(LOG_NOTICE,
"TLS: pvt key doesn't match public key '%s'.",
lo->ldo_tls_server_ident_ref_name);
tlso_report_error();
status = -1;
}
done:
if(pvtKey)
EVP_PKEY_free(pvtKey);
if(keyRef)
CFRelease(keyRef);
if(x509_cert)
X509_free(x509_cert);
if(certRef)
CFRelease(certRef);
if(sslIdentityRef)
CFRelease(sslIdentityRef);
if(status != noErr)
return -1;
}
else
{
#endif
if (lo->ldo_tls_cacertfile != NULL || lo->ldo_tls_cacertdir != NULL) {
if ( !SSL_CTX_load_verify_locations( ctx,
lt->lt_cacertfile, lt->lt_cacertdir ) ||
!SSL_CTX_set_default_verify_paths( ctx ) )
{
Debug( LDAP_DEBUG_ANY, "TLS: "
"could not load verify locations (file:`%s',dir:`%s').\n",
lo->ldo_tls_cacertfile ? lo->ldo_tls_cacertfile : "",
lo->ldo_tls_cacertdir ? lo->ldo_tls_cacertdir : "",
0 );
tlso_report_error();
return -1;
}
if ( is_server ) {
STACK_OF(X509_NAME) *calist;
calist = tlso_ca_list( lt->lt_cacertfile, lt->lt_cacertdir );
if ( !calist ) {
Debug( LDAP_DEBUG_ANY, "TLS: "
"could not load client CA list (file:`%s',dir:`%s').\n",
lo->ldo_tls_cacertfile ? lo->ldo_tls_cacertfile : "",
lo->ldo_tls_cacertdir ? lo->ldo_tls_cacertdir : "",
0 );
tlso_report_error();
return -1;
}
SSL_CTX_set_client_CA_list( ctx, calist );
}
}
if ( lo->ldo_tls_certfile &&
!SSL_CTX_use_certificate_file( ctx,
lt->lt_certfile, SSL_FILETYPE_PEM ) )
{
Debug( LDAP_DEBUG_ANY,
"TLS: could not use certificate `%s'.\n",
lo->ldo_tls_certfile,0,0);
tlso_report_error();
return -1;
}
if ( lo->ldo_tls_keyfile )
{
FILE *fp;
EVP_PKEY *privatekey;
int success;
Debug( LDAP_DEBUG_ANY,
"TLS: attempting to read `%s'.\n",
lo->ldo_tls_keyfile,0,0);
if ((fp = fopen(lo->ldo_tls_keyfile, "r")) == NULL) {
success = 0;
} else {
privatekey = SSL_read_PrivateKey(fp, NULL,
tlso_pphrase_cb);
success = (privatekey != NULL ? 1 : 0);
fclose(fp);
}
if (!success || !SSL_CTX_use_PrivateKey( lo->ldo_tls_ctx, privatekey ) )
{
Debug( LDAP_DEBUG_ANY,
"TLS: could not use key file `%s'.\n",
lo->ldo_tls_keyfile,0,0);
tlso_report_error();
return -1;
}
}
#ifdef __APPLE__
}
if ( lo->ldo_tls_cert_ref ) {
if ( !tlso_use_cert_from_keychain( lo ) ) {
return -1;
}
}
#endif
if ( lo->ldo_tls_dhfile ) {
DH *dh = NULL;
BIO *bio;
dhplist *p;
if (( bio=BIO_new_file( lt->lt_dhfile,"r" )) == NULL ) {
Debug( LDAP_DEBUG_ANY,
"TLS: could not use DH parameters file `%s'.\n",
lo->ldo_tls_dhfile,0,0);
tlso_report_error();
return -1;
}
while (( dh=PEM_read_bio_DHparams( bio, NULL, NULL, NULL ))) {
p = LDAP_MALLOC( sizeof(dhplist) );
if ( p != NULL ) {
p->keylength = DH_size( dh ) * 8;
p->param = dh;
p->next = tlso_dhparams;
tlso_dhparams = p;
}
}
BIO_free( bio );
}
if ( tlso_opt_trace ) {
SSL_CTX_set_info_callback( ctx, tlso_info_cb );
}
i = SSL_VERIFY_NONE;
if ( lo->ldo_tls_require_cert ) {
i = SSL_VERIFY_PEER;
if ( lo->ldo_tls_require_cert == LDAP_OPT_X_TLS_DEMAND ||
lo->ldo_tls_require_cert == LDAP_OPT_X_TLS_HARD ) {
i |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
}
}
SSL_CTX_set_verify( ctx, i,
lo->ldo_tls_require_cert == LDAP_OPT_X_TLS_ALLOW ?
tlso_verify_ok : tlso_verify_cb );
SSL_CTX_set_tmp_rsa_callback( ctx, tlso_tmp_rsa_cb );
if ( lo->ldo_tls_dhfile ) {
SSL_CTX_set_tmp_dh_callback( ctx, tlso_tmp_dh_cb );
}
#ifdef HAVE_OPENSSL_CRL
if ( lo->ldo_tls_crlcheck ) {
X509_STORE *x509_s = SSL_CTX_get_cert_store( ctx );
if ( lo->ldo_tls_crlcheck == LDAP_OPT_X_TLS_CRL_PEER ) {
X509_STORE_set_flags( x509_s, X509_V_FLAG_CRL_CHECK );
} else if ( lo->ldo_tls_crlcheck == LDAP_OPT_X_TLS_CRL_ALL ) {
X509_STORE_set_flags( x509_s,
X509_V_FLAG_CRL_CHECK | X509_V_FLAG_CRL_CHECK_ALL );
}
}
#endif
return 0;
}
static tls_session *
tlso_session_new( tls_ctx *ctx, int is_server )
{
tlso_ctx *c = (tlso_ctx *)ctx;
return (tls_session *)SSL_new( c );
}
static int
tlso_session_connect( LDAP *ld, tls_session *sess )
{
tlso_session *s = (tlso_session *)sess;
return SSL_connect( s ) - 1;
}
static int
tlso_session_accept( tls_session *sess )
{
tlso_session *s = (tlso_session *)sess;
return SSL_accept( s ) - 1;
}
static int
tlso_session_upflags( Sockbuf *sb, tls_session *sess, int rc )
{
tlso_session *s = (tlso_session *)sess;
rc = SSL_get_error(s, rc+1);
if (rc == SSL_ERROR_WANT_READ) {
sb->sb_trans_needs_read = 1;
return 1;
} else if (rc == SSL_ERROR_WANT_WRITE) {
sb->sb_trans_needs_write = 1;
return 1;
} else if (rc == SSL_ERROR_WANT_CONNECT) {
return 1;
}
return 0;
}
static char *
tlso_session_errmsg( tls_session *sess, int rc, char *buf, size_t len )
{
char err[256] = "";
const char *certerr=NULL;
tlso_session *s = (tlso_session *)sess;
rc = ERR_peek_error();
if ( rc ) {
ERR_error_string_n( rc, err, sizeof(err) );
if ( ( ERR_GET_LIB(rc) == ERR_LIB_SSL ) &&
( ERR_GET_REASON(rc) == SSL_R_CERTIFICATE_VERIFY_FAILED ) ) {
int certrc = SSL_get_verify_result(s);
certerr = (char *)X509_verify_cert_error_string(certrc);
}
snprintf(buf, len, "%s%s%s%s", err, certerr ? " (" :"",
certerr ? certerr : "", certerr ? ")" : "" );
return buf;
}
return NULL;
}
static int
tlso_session_my_dn( tls_session *sess, struct berval *der_dn )
{
tlso_session *s = (tlso_session *)sess;
X509 *x;
X509_NAME *xn;
x = SSL_get_certificate( s );
if (!x) return LDAP_INVALID_CREDENTIALS;
xn = X509_get_subject_name(x);
der_dn->bv_len = i2d_X509_NAME( xn, NULL );
der_dn->bv_val = xn->bytes->data;
return 0;
}
static X509 *
tlso_get_cert( SSL *s )
{
if (SSL_get_verify_result(s)) {
return NULL;
}
return SSL_get_peer_certificate(s);
}
static int
tlso_session_peer_dn( tls_session *sess, struct berval *der_dn )
{
tlso_session *s = (tlso_session *)sess;
X509 *x = tlso_get_cert( s );
X509_NAME *xn;
if ( !x )
return LDAP_INVALID_CREDENTIALS;
xn = X509_get_subject_name(x);
der_dn->bv_len = i2d_X509_NAME( xn, NULL );
der_dn->bv_val = xn->bytes->data;
X509_free(x);
return 0;
}
#define IS_DNS 0
#define IS_IP4 1
#define IS_IP6 2
static int
tlso_session_chkhost( LDAP *ld, tls_session *sess, const char *name_in )
{
tlso_session *s = (tlso_session *)sess;
int i, ret = LDAP_LOCAL_ERROR;
X509 *x;
const char *name;
char *ptr;
int ntype = IS_DNS, nlen;
#ifdef LDAP_PF_INET6
struct in6_addr addr;
#else
struct in_addr addr;
#endif
if( ldap_int_hostname &&
( !name_in || !strcasecmp( name_in, "localhost" ) ) )
{
name = ldap_int_hostname;
} else {
name = name_in;
}
nlen = strlen(name);
x = tlso_get_cert(s);
if (!x) {
Debug( LDAP_DEBUG_ANY,
"TLS: unable to get peer certificate.\n",
0, 0, 0 );
return LDAP_SUCCESS;
}
#ifdef LDAP_PF_INET6
if (name[0] == '[' && strchr(name, ']')) {
char *n2 = ldap_strdup(name+1);
*strchr(n2, ']') = 0;
if (inet_pton(AF_INET6, n2, &addr))
ntype = IS_IP6;
LDAP_FREE(n2);
} else
#endif
if ((ptr = strrchr(name, '.')) && isdigit((unsigned char)ptr[1])) {
if (inet_aton(name, (struct in_addr *)&addr)) ntype = IS_IP4;
}
i = X509_get_ext_by_NID(x, NID_subject_alt_name, -1);
if (i >= 0) {
X509_EXTENSION *ex;
STACK_OF(GENERAL_NAME) *alt;
ex = X509_get_ext(x, i);
alt = X509V3_EXT_d2i(ex);
if (alt) {
int n, len2 = 0;
char *domain = NULL;
GENERAL_NAME *gn;
if (ntype == IS_DNS) {
domain = strchr(name, '.');
if (domain) {
len2 = nlen - (domain-name);
}
}
n = sk_GENERAL_NAME_num(alt);
for (i=0; i<n; i++) {
char *sn;
int sl;
gn = sk_GENERAL_NAME_value(alt, i);
if (gn->type == GEN_DNS) {
if (ntype != IS_DNS) continue;
sn = (char *) ASN1_STRING_data(gn->d.ia5);
sl = ASN1_STRING_length(gn->d.ia5);
if (sl == 0) continue;
if ((nlen == sl) && !strncasecmp(name, sn, nlen)) {
break;
}
if (domain && (sn[0] == '*') && (sn[1] == '.') &&
(len2 == sl-1) && !strncasecmp(domain, &sn[1], len2))
{
break;
}
} else if (gn->type == GEN_IPADD) {
if (ntype == IS_DNS) continue;
sn = (char *) ASN1_STRING_data(gn->d.ia5);
sl = ASN1_STRING_length(gn->d.ia5);
#ifdef LDAP_PF_INET6
if (ntype == IS_IP6 && sl != sizeof(struct in6_addr)) {
continue;
} else
#endif
if (ntype == IS_IP4 && sl != sizeof(struct in_addr)) {
continue;
}
if (!memcmp(sn, &addr, sl)) {
break;
}
}
}
GENERAL_NAMES_free(alt);
if (i < n) {
ret = LDAP_SUCCESS;
}
}
}
if (ret != LDAP_SUCCESS) {
X509_NAME *xn;
X509_NAME_ENTRY *ne;
ASN1_OBJECT *obj;
ASN1_STRING *cn = NULL;
int navas;
obj = OBJ_nid2obj( NID_commonName );
if ( !obj ) goto no_cn;
xn = X509_get_subject_name(x);
navas = X509_NAME_entry_count( xn );
for ( i=navas-1; i>=0; i-- ) {
ne = X509_NAME_get_entry( xn, i );
if ( !OBJ_cmp( ne->object, obj )) {
cn = X509_NAME_ENTRY_get_data( ne );
break;
}
}
if( !cn )
{
no_cn:
Debug( LDAP_DEBUG_ANY,
"TLS: unable to get common name from peer certificate.\n",
0, 0, 0 );
ret = LDAP_CONNECT_ERROR;
if ( ld->ld_error ) {
LDAP_FREE( ld->ld_error );
}
ld->ld_error = LDAP_STRDUP(
_("TLS: unable to get CN from peer certificate"));
} else if ( cn->length == nlen &&
strncasecmp( name, (char *) cn->data, nlen ) == 0 ) {
ret = LDAP_SUCCESS;
} else if (( cn->data[0] == '*' ) && ( cn->data[1] == '.' )) {
char *domain = strchr(name, '.');
if( domain ) {
int dlen;
dlen = nlen - (domain-name);
if ((dlen == cn->length-1) &&
!strncasecmp(domain, (char *) &cn->data[1], dlen)) {
ret = LDAP_SUCCESS;
}
}
}
if( ret == LDAP_LOCAL_ERROR ) {
Debug( LDAP_DEBUG_ANY, "TLS: hostname (%s) does not match "
"common name in certificate (%.*s).\n",
name, cn->length, cn->data );
ret = LDAP_CONNECT_ERROR;
if ( ld->ld_error ) {
LDAP_FREE( ld->ld_error );
}
ld->ld_error = LDAP_STRDUP(
_("TLS: hostname does not match CN in peer certificate"));
}
}
X509_free(x);
return ret;
}
static int
tlso_session_strength( tls_session *sess )
{
tlso_session *s = (tlso_session *)sess;
SSL_CIPHER *c;
c = SSL_get_current_cipher(s);
return SSL_CIPHER_get_bits(c, NULL);
}
struct tls_data {
tlso_session *session;
Sockbuf_IO_Desc *sbiod;
};
static int
tlso_bio_create( BIO *b ) {
b->init = 1;
b->num = 0;
b->ptr = NULL;
b->flags = 0;
return 1;
}
static int
tlso_bio_destroy( BIO *b )
{
if ( b == NULL ) return 0;
b->ptr = NULL;
b->init = 0;
b->flags = 0;
return 1;
}
static int
tlso_bio_read( BIO *b, char *buf, int len )
{
struct tls_data *p;
int ret;
if ( buf == NULL || len <= 0 ) return 0;
p = (struct tls_data *)b->ptr;
if ( p == NULL || p->sbiod == NULL ) {
return 0;
}
ret = LBER_SBIOD_READ_NEXT( p->sbiod, buf, len );
BIO_clear_retry_flags( b );
if ( ret < 0 ) {
int err = sock_errno();
if ( err == EAGAIN || err == EWOULDBLOCK ) {
BIO_set_retry_read( b );
}
}
return ret;
}
static int
tlso_bio_write( BIO *b, const char *buf, int len )
{
struct tls_data *p;
int ret;
if ( buf == NULL || len <= 0 ) return 0;
p = (struct tls_data *)b->ptr;
if ( p == NULL || p->sbiod == NULL ) {
return 0;
}
ret = LBER_SBIOD_WRITE_NEXT( p->sbiod, (char *)buf, len );
BIO_clear_retry_flags( b );
if ( ret < 0 ) {
int err = sock_errno();
if ( err == EAGAIN || err == EWOULDBLOCK ) {
BIO_set_retry_write( b );
}
}
return ret;
}
static long
tlso_bio_ctrl( BIO *b, int cmd, long num, void *ptr )
{
if ( cmd == BIO_CTRL_FLUSH ) {
return 1;
}
return 0;
}
static int
tlso_bio_gets( BIO *b, char *buf, int len )
{
return -1;
}
static int
tlso_bio_puts( BIO *b, const char *str )
{
return tlso_bio_write( b, str, strlen( str ) );
}
static BIO_METHOD tlso_bio_method =
{
( 100 | 0x400 ),
"sockbuf glue",
tlso_bio_write,
tlso_bio_read,
tlso_bio_puts,
tlso_bio_gets,
tlso_bio_ctrl,
tlso_bio_create,
tlso_bio_destroy
};
static int
tlso_sb_setup( Sockbuf_IO_Desc *sbiod, void *arg )
{
struct tls_data *p;
BIO *bio;
assert( sbiod != NULL );
p = LBER_MALLOC( sizeof( *p ) );
if ( p == NULL ) {
return -1;
}
p->session = arg;
p->sbiod = sbiod;
bio = BIO_new( &tlso_bio_method );
bio->ptr = (void *)p;
SSL_set_bio( p->session, bio, bio );
sbiod->sbiod_pvt = p;
return 0;
}
static int
tlso_sb_remove( Sockbuf_IO_Desc *sbiod )
{
struct tls_data *p;
assert( sbiod != NULL );
assert( sbiod->sbiod_pvt != NULL );
p = (struct tls_data *)sbiod->sbiod_pvt;
SSL_free( p->session );
LBER_FREE( sbiod->sbiod_pvt );
sbiod->sbiod_pvt = NULL;
return 0;
}
static int
tlso_sb_close( Sockbuf_IO_Desc *sbiod )
{
struct tls_data *p;
assert( sbiod != NULL );
assert( sbiod->sbiod_pvt != NULL );
p = (struct tls_data *)sbiod->sbiod_pvt;
SSL_shutdown( p->session );
return 0;
}
static int
tlso_sb_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg )
{
struct tls_data *p;
assert( sbiod != NULL );
assert( sbiod->sbiod_pvt != NULL );
p = (struct tls_data *)sbiod->sbiod_pvt;
if ( opt == LBER_SB_OPT_GET_SSL ) {
*((tlso_session **)arg) = p->session;
return 1;
} else if ( opt == LBER_SB_OPT_DATA_READY ) {
if( SSL_pending( p->session ) > 0 ) {
return 1;
}
}
return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg );
}
static ber_slen_t
tlso_sb_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
{
struct tls_data *p;
ber_slen_t ret;
int err;
assert( sbiod != NULL );
assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
p = (struct tls_data *)sbiod->sbiod_pvt;
ret = SSL_read( p->session, (char *)buf, len );
#ifdef HAVE_WINSOCK
errno = WSAGetLastError();
#endif
err = SSL_get_error( p->session, ret );
if (err == SSL_ERROR_WANT_READ ) {
sbiod->sbiod_sb->sb_trans_needs_read = 1;
sock_errset(EWOULDBLOCK);
}
else
sbiod->sbiod_sb->sb_trans_needs_read = 0;
return ret;
}
static ber_slen_t
tlso_sb_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
{
struct tls_data *p;
ber_slen_t ret;
int err;
assert( sbiod != NULL );
assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
p = (struct tls_data *)sbiod->sbiod_pvt;
ret = SSL_write( p->session, (char *)buf, len );
#ifdef HAVE_WINSOCK
errno = WSAGetLastError();
#endif
err = SSL_get_error( p->session, ret );
if (err == SSL_ERROR_WANT_WRITE ) {
sbiod->sbiod_sb->sb_trans_needs_write = 1;
sock_errset(EWOULDBLOCK);
} else {
sbiod->sbiod_sb->sb_trans_needs_write = 0;
}
return ret;
}
static Sockbuf_IO tlso_sbio =
{
tlso_sb_setup,
tlso_sb_remove,
tlso_sb_ctrl,
tlso_sb_read,
tlso_sb_write,
tlso_sb_close
};
static void
tlso_info_cb( const SSL *ssl, int where, int ret )
{
int w;
char *op;
char *state = (char *) SSL_state_string_long( (SSL *)ssl );
w = where & ~SSL_ST_MASK;
if ( w & SSL_ST_CONNECT ) {
op = "SSL_connect";
} else if ( w & SSL_ST_ACCEPT ) {
op = "SSL_accept";
} else {
op = "undefined";
}
#ifdef HAVE_EBCDIC
if ( state ) {
state = LDAP_STRDUP( state );
__etoa( state );
}
#endif
if ( where & SSL_CB_LOOP ) {
Debug( LDAP_DEBUG_TRACE,
"TLS trace: %s:%s\n",
op, state, 0 );
} else if ( where & SSL_CB_ALERT ) {
char *atype = (char *) SSL_alert_type_string_long( ret );
char *adesc = (char *) SSL_alert_desc_string_long( ret );
op = ( where & SSL_CB_READ ) ? "read" : "write";
#ifdef HAVE_EBCDIC
if ( atype ) {
atype = LDAP_STRDUP( atype );
__etoa( atype );
}
if ( adesc ) {
adesc = LDAP_STRDUP( adesc );
__etoa( adesc );
}
#endif
Debug( LDAP_DEBUG_TRACE,
"TLS trace: SSL3 alert %s:%s:%s\n",
op, atype, adesc );
#ifdef HAVE_EBCDIC
if ( atype ) LDAP_FREE( atype );
if ( adesc ) LDAP_FREE( adesc );
#endif
} else if ( where & SSL_CB_EXIT ) {
if ( ret == 0 ) {
Debug( LDAP_DEBUG_TRACE,
"TLS trace: %s:failed in %s\n",
op, state, 0 );
} else if ( ret < 0 ) {
Debug( LDAP_DEBUG_TRACE,
"TLS trace: %s:error in %s\n",
op, state, 0 );
}
}
#ifdef HAVE_EBCDIC
if ( state ) LDAP_FREE( state );
#endif
}
static int
tlso_verify_cb( int ok, X509_STORE_CTX *ctx )
{
X509 *cert;
int errnum;
int errdepth;
X509_NAME *subject;
X509_NAME *issuer;
char *sname;
char *iname;
char *certerr = NULL;
cert = X509_STORE_CTX_get_current_cert( ctx );
errnum = X509_STORE_CTX_get_error( ctx );
errdepth = X509_STORE_CTX_get_error_depth( ctx );
subject = X509_get_subject_name( cert );
issuer = X509_get_issuer_name( cert );
sname = X509_NAME_oneline( subject, NULL, 0 );
iname = X509_NAME_oneline( issuer, NULL, 0 );
if ( !ok ) certerr = (char *)X509_verify_cert_error_string( errnum );
#ifdef HAVE_EBCDIC
if ( sname ) __etoa( sname );
if ( iname ) __etoa( iname );
if ( certerr ) {
certerr = LDAP_STRDUP( certerr );
__etoa( certerr );
}
#endif
Debug( LDAP_DEBUG_TRACE,
"TLS certificate verification: depth: %d, err: %d, subject: %s,",
errdepth, errnum,
sname ? sname : "-unknown-" );
Debug( LDAP_DEBUG_TRACE, " issuer: %s\n", iname ? iname : "-unknown-", 0, 0 );
if ( !ok ) {
Debug( LDAP_DEBUG_ANY,
"TLS certificate verification: Error, %s\n",
certerr, 0, 0 );
}
if ( sname )
CRYPTO_free ( sname );
if ( iname )
CRYPTO_free ( iname );
#ifdef HAVE_EBCDIC
if ( certerr ) LDAP_FREE( certerr );
#endif
return ok;
}
static int
tlso_verify_ok( int ok, X509_STORE_CTX *ctx )
{
(void) tlso_verify_cb( ok, ctx );
return 1;
}
static void
tlso_report_error( void )
{
unsigned long l;
char buf[200];
const char *file;
int line;
while ( ( l = ERR_get_error_line( &file, &line ) ) != 0 ) {
ERR_error_string_n( l, buf, sizeof( buf ) );
#ifdef HAVE_EBCDIC
if ( file ) {
file = LDAP_STRDUP( file );
__etoa( (char *)file );
}
__etoa( buf );
#endif
Debug( LDAP_DEBUG_ANY, "TLS: %s %s:%d\n",
buf, file, line );
#ifdef HAVE_EBCDIC
if ( file ) LDAP_FREE( (void *)file );
#endif
}
}
static RSA *
tlso_tmp_rsa_cb( SSL *ssl, int is_export, int key_length )
{
RSA *tmp_rsa;
#if OPENSSL_VERSION_NUMBER >= 0x00908000
BIGNUM *bn = BN_new();
tmp_rsa = NULL;
if ( bn ) {
if ( BN_set_word( bn, RSA_F4 )) {
tmp_rsa = RSA_new();
if ( tmp_rsa && !RSA_generate_key_ex( tmp_rsa, key_length, bn, NULL )) {
RSA_free( tmp_rsa );
tmp_rsa = NULL;
}
}
BN_free( bn );
}
#else
tmp_rsa = RSA_generate_key( key_length, RSA_F4, NULL, NULL );
#endif
if ( !tmp_rsa ) {
Debug( LDAP_DEBUG_ANY,
"TLS: Failed to generate temporary %d-bit %s RSA key\n",
key_length, is_export ? "export" : "domestic", 0 );
}
return tmp_rsa;
}
static int
tlso_seed_PRNG( const char *randfile )
{
#ifndef URANDOM_DEVICE
long total=0;
char buffer[MAXPATHLEN];
if (randfile == NULL) {
randfile = RAND_file_name( buffer, sizeof( buffer ) );
} else if (RAND_egd(randfile) > 0) {
return 0;
}
if (randfile == NULL) {
Debug( LDAP_DEBUG_ANY,
"TLS: Use configuration file or $RANDFILE to define seed PRNG\n",
0, 0, 0);
return -1;
}
total = RAND_load_file(randfile, -1);
if (RAND_status() == 0) {
Debug( LDAP_DEBUG_ANY,
"TLS: PRNG not been seeded with enough data\n",
0, 0, 0);
return -1;
}
RAND_write_file(randfile);
#endif
return 0;
}
struct dhinfo {
int keylength;
const char *pem;
size_t size;
};
static const char tlso_dhpem512[] =
"-----BEGIN DH PARAMETERS-----\n\
MEYCQQDaWDwW2YUiidDkr3VvTMqS3UvlM7gE+w/tlO+cikQD7VdGUNNpmdsp13Yn\n\
a6LT1BLiGPTdHghM9tgAPnxHdOgzAgEC\n\
-----END DH PARAMETERS-----\n";
static const char tlso_dhpem1024[] =
"-----BEGIN DH PARAMETERS-----\n\
MIGHAoGBAJf2QmHKtQXdKCjhPx1ottPb0PMTBH9A6FbaWMsTuKG/K3g6TG1Z1fkq\n\
/Gz/PWk/eLI9TzFgqVAuPvr3q14a1aZeVUMTgo2oO5/y2UHe6VaJ+trqCTat3xlx\n\
/mNbIK9HA2RgPC3gWfVLZQrY+gz3ASHHR5nXWHEyvpuZm7m3h+irAgEC\n\
-----END DH PARAMETERS-----\n";
static const char tlso_dhpem2048[] =
"-----BEGIN DH PARAMETERS-----\n\
MIIBCAKCAQEA7ZKJNYJFVcs7+6J2WmkEYb8h86tT0s0h2v94GRFS8Q7B4lW9aG9o\n\
AFO5Imov5Jo0H2XMWTKKvbHbSe3fpxJmw/0hBHAY8H/W91hRGXKCeyKpNBgdL8sh\n\
z22SrkO2qCnHJ6PLAMXy5fsKpFmFor2tRfCzrfnggTXu2YOzzK7q62bmqVdmufEo\n\
pT8igNcLpvZxk5uBDvhakObMym9mX3rAEBoe8PwttggMYiiw7NuJKO4MqD1llGkW\n\
aVM8U2ATsCun1IKHrRxynkE1/MJ86VHeYYX8GZt2YA8z+GuzylIOKcMH6JAWzMwA\n\
Gbatw6QwizOhr9iMjZ0B26TE3X8LvW84wwIBAg==\n\
-----END DH PARAMETERS-----\n";
static const char tlso_dhpem4096[] =
"-----BEGIN DH PARAMETERS-----\n\
MIICCAKCAgEA/urRnb6vkPYc/KEGXWnbCIOaKitq7ySIq9dTH7s+Ri59zs77zty7\n\
vfVlSe6VFTBWgYjD2XKUFmtqq6CqXMhVX5ElUDoYDpAyTH85xqNFLzFC7nKrff/H\n\
TFKNttp22cZE9V0IPpzedPfnQkE7aUdmF9JnDyv21Z/818O93u1B4r0szdnmEvEF\n\
bKuIxEHX+bp0ZR7RqE1AeifXGJX3d6tsd2PMAObxwwsv55RGkn50vHO4QxtTARr1\n\
rRUV5j3B3oPMgC7Offxx+98Xn45B1/G0Prp11anDsR1PGwtaCYipqsvMwQUSJtyE\n\
EOQWk+yFkeMe4vWv367eEi0Sd/wnC+TSXBE3pYvpYerJ8n1MceI5GQTdarJ77OW9\n\
bGTHmxRsLSCM1jpLdPja5jjb4siAa6EHc4qN9c/iFKS3PQPJEnX7pXKBRs5f7AF3\n\
W3RIGt+G9IVNZfXaS7Z/iCpgzgvKCs0VeqN38QsJGtC1aIkwOeyjPNy2G6jJ4yqH\n\
ovXYt/0mc00vCWeSNS1wren0pR2EiLxX0ypjjgsU1mk/Z3b/+zVf7fZSIB+nDLjb\n\
NPtUlJCVGnAeBK1J1nG3TQicqowOXoM6ISkdaXj5GPJdXHab2+S7cqhKGv5qC7rR\n\
jT6sx7RUr0CNTxzLI7muV2/a4tGmj0PSdXQdsZ7tw7gbXlaWT1+MM2MCAQI=\n\
-----END DH PARAMETERS-----\n";
static const struct dhinfo tlso_dhpem[] = {
{ 512, tlso_dhpem512, sizeof(tlso_dhpem512) },
{ 1024, tlso_dhpem1024, sizeof(tlso_dhpem1024) },
{ 2048, tlso_dhpem2048, sizeof(tlso_dhpem2048) },
{ 4096, tlso_dhpem4096, sizeof(tlso_dhpem4096) },
{ 0, NULL, 0 }
};
static DH *
tlso_tmp_dh_cb( SSL *ssl, int is_export, int key_length )
{
struct dhplist *p = NULL;
BIO *b = NULL;
DH *dh = NULL;
int i;
LDAP_MUTEX_LOCK( &tlso_dh_mutex );
for ( p = tlso_dhparams; p; p=p->next ) {
if ( p->keylength == key_length ) {
LDAP_MUTEX_UNLOCK( &tlso_dh_mutex );
return p->param;
}
}
for (i=0; tlso_dhpem[i].keylength; i++) {
if ( tlso_dhpem[i].keylength == key_length ) {
b = BIO_new_mem_buf( (char *)tlso_dhpem[i].pem, tlso_dhpem[i].size );
break;
}
}
if ( b ) {
dh = PEM_read_bio_DHparams( b, NULL, NULL, NULL );
BIO_free( b );
}
if ( !dh ) {
dh = DH_generate_parameters( key_length, DH_GENERATOR_2, NULL, NULL );
}
if ( dh ) {
p = LDAP_MALLOC( sizeof(struct dhplist) );
if ( p != NULL ) {
p->keylength = key_length;
p->param = dh;
p->next = tlso_dhparams;
tlso_dhparams = p;
}
}
LDAP_MUTEX_UNLOCK( &tlso_dh_mutex );
return dh;
}
tls_impl ldap_int_tls_impl = {
"OpenSSL",
tlso_init,
tlso_destroy,
tlso_ctx_new,
tlso_ctx_ref,
tlso_ctx_free,
tlso_ctx_init,
tlso_session_new,
tlso_session_connect,
tlso_session_accept,
tlso_session_upflags,
tlso_session_errmsg,
tlso_session_my_dn,
tlso_session_peer_dn,
tlso_session_chkhost,
tlso_session_strength,
&tlso_sbio,
#ifdef LDAP_R_COMPILE
tlso_thr_init,
#else
NULL,
#endif
0
};
#ifdef __APPLE__
static int
tlso_use_cert_from_keychain( struct ldapoptions *lo )
{
if ( lo == NULL || lo->ldo_tls_cert_ref == NULL ) {
return 0;
}
CFDataRef certificateCFData = NULL;
OSStatus status = SecKeychainItemExport( lo->ldo_tls_cert_ref,
kSecFormatX509Cert,
0,
NULL,
&certificateCFData );
if ( status != noErr ) {
Debug( LDAP_DEBUG_ANY,
"%s: SecKeychainItemExport(certificateRef) failed: %d\n",
__PRETTY_FUNCTION__, (int)status, 0 );
syslog( LOG_ERR, "%s: SecKeychainItemExport(certificateRef): %d",
__PRETTY_FUNCTION__, (int)status, 0 );
cssmPerror( "SecKeychainItemExport(certificateRef)", status );
return 0;
}
int rc = 0;
unsigned char *certificateData = NULL;
int certificateDataLen = CFDataGetLength( certificateCFData );
if ( certificateDataLen ) {
certificateData = LDAP_MALLOC( certificateDataLen * sizeof(*certificateData) );
if ( certificateData ) {
CFDataGetBytes( certificateCFData,
CFRangeMake(0, certificateDataLen),
certificateData );
rc = SSL_CTX_use_certificate_ASN1( lo->ldo_tls_ctx,
certificateDataLen,
certificateData );
if ( !rc ) {
Debug( LDAP_DEBUG_ANY,
"TLS: could not use keychain certificate data in SSL_CTX_use_certificate_ASN1\n",
0,0,0);
tlso_report_error();
}
else {
Debug( LDAP_DEBUG_ANY,
"TLS: using keychain certificate data\n",
0, 0, 0);
}
LDAP_FREE( certificateData );
}
}
CFRelease( certificateCFData );
return rc;
}
static X509 *tslo_copy_cert_to_x509(SecCertificateRef inRef)
{
X509 *result = NULL;
const unsigned char *buf = NULL;
CFDataRef DERCertData = SecCertificateCopyData(inRef);
CFIndex len = 0;
if(DERCertData == NULL) return NULL;
len = CFDataGetLength(DERCertData);
buf = (const unsigned char *)CFDataGetBytePtr(DERCertData);
result = d2i_X509(NULL, &buf, len);
CFRelease(DERCertData);
return result;
}
static EVP_PKEY *tslo_copy_key_to_evpkey(SecKeyRef inKey)
{
OSStatus ortn = 0;
EVP_PKEY *result = NULL;
SecItemImportExportKeyParameters params;
CFDataRef intermediateData = NULL;
BIO *intermediateBIO = NULL;
char* cExportPass = ";aweCrugf99;uvPvh8229fliaYnx``1";
CFStringRef cfExportPass = NULL;
cfExportPass = CFStringCreateWithCString(NULL, cExportPass, kCFStringEncodingUTF8);
if (!cfExportPass) {
syslog(LOG_DEBUG, "TLS: Unable to create CFString private key passphrase.");
return NULL;
}
memset(¶ms, 0, sizeof(params));
params.version = SEC_KEY_IMPORT_EXPORT_PARAMS_VERSION;
params.flags = 0;
params.passphrase = cfExportPass;
ortn = SecItemExport(inKey, kSecFormatWrappedPKCS8, 0, ¶ms, (CFDataRef*)&intermediateData);
if(ortn != 0) {
syslog( LOG_DEBUG, "TLS: Unable to export private key.");
CFRelease(cfExportPass);
return NULL;
}
intermediateBIO = BIO_new_mem_buf((void *)CFDataGetBytePtr(intermediateData), CFDataGetLength(intermediateData));
if(intermediateBIO == NULL)
{
syslog( LOG_DEBUG, "TLS: Unable to create BIO buffer for private key data.");
CFRelease(cfExportPass);
CFRelease(intermediateData);
return NULL;
}
result = d2i_PKCS8PrivateKey_bio(intermediateBIO, NULL, NULL, cExportPass);
if(result == NULL)
{
char errbuf[512];
ERR_error_string(ERR_get_error(), errbuf);
syslog( LOG_DEBUG, "TLS: Unable to use passphrase for private key: %s.", errbuf);
}
BIO_free_all(intermediateBIO);
CFRelease(intermediateData);
CFRelease(cfExportPass);
return result;
}
static OSStatus tslo_create_ca_chain(SSL_CTX* ctx, SecCertificateRef sslCertRef)
{
OSStatus status = noErr;
CFMutableArrayRef certChain = CFArrayCreateMutable(NULL, 0, &kCFTypeArrayCallBacks);
SecPolicyRef policy = SecPolicyCreateBasicX509();
SecTrustRef trustRef = NULL;
SecTrustResultType trustResult = NULL;
X509* x509_cert = NULL;
SSL_CTX_set_mode(ctx, SSL_MODE_NO_AUTO_CHAIN);
do {
if (sslCertRef) {
CFArrayAppendValue(certChain, sslCertRef);
status = SecTrustCreateWithCertificates(certChain, policy, &trustRef);
if (status == noErr) {
status = SecTrustEvaluate(trustRef, &trustResult);
if (status == noErr) {
CFIndex count = SecTrustGetCertificateCount(trustRef);
if (count) {
int i;
for (i = 0; i < count; i++) {
SecCertificateRef certInChainRef = SecTrustGetCertificateAtIndex(trustRef, i);
if (certInChainRef) {
x509_cert = tslo_copy_cert_to_x509(certInChainRef);
if(SSL_CTX_add_client_CA(ctx, x509_cert) < 1) {
syslog( LOG_DEBUG, "[%s] TLS: could not load client CA name using SSL_CTX_add_client_CA ", __func__);
tlso_report_error();
status = -1;
X509_free(x509_cert);
break;
}
if(SSL_CTX_add_extra_chain_cert(ctx, x509_cert) < 1) {
syslog( LOG_DEBUG, "[%s] TLS: could not load client CA name using SSL_CTX_add_extra_chain_cert ", __func__);
tlso_report_error();
status = -1;
X509_free(x509_cert);
break;
}
}
}
} else {
syslog( LOG_DEBUG, "[%s] SecTrustGetCertificateCount - No Certificates returned", __func__);
status = -1;
break;
}
} else {
syslog( LOG_DEBUG, "[%s] SecTrustEvaluate (ssl) err (%d) trustResult(%d)", __func__, status, trustResult);
status = -1;
break;
}
} else {
syslog( LOG_DEBUG, "[%s] SecTrustCreateWithCertificates (ssl) err (%d)", __func__, status);
status = -1;
break;
}
}
} while (0);
if (certChain)
CFRelease(certChain);
if (policy)
CFRelease(policy);
if (trustRef)
CFRelease(trustRef);
return status;
}
#endif
#endif