lobo/isync
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

handle CertificateFile more cleanly

Browse Source 
properly distribute the certificates between the SSL context's trust
store and our host cert list.

as a drive-by, clean up some nasty type casts at the cost of including
a second OpenSSL header into socket.h.
This commit is contained in:
Oswald Buddenhagen 2020-07-29 20:23:54 +02:00
parent cfaa4848dd
commit 481c12a8b3
4 changed files with 32 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
src/common.h
View File

@ -172,6 +172,7 @@ int ATTR_PRINTFLIKE(2, 0) nfvasprintf( char **str, const char *fmt, va_list va )
int ATTR_PRINTFLIKE(2, 3) nfasprintf( char **str, const char *fmt, ... );
int ATTR_PRINTFLIKE(3, 4) nfsnprintf( char *buf, int blen, const char *fmt, ... );
void ATTR_NORETURN oob( void );
void ATTR_NORETURN oom( void );
char *expand_strdup( const char *s );

32
src/socket.c
View File

@ -194,7 +194,6 @@ verify_cert_host( const server_conf_t *conf, conn_t *sock )
int i;
long err;
X509 *cert;
STACK_OF(X509_OBJECT) *trusted;
cert = SSL_get_peer_certificate( sock->ssl );
if (!cert) {
@ -202,9 +201,8 @@ verify_cert_host( const server_conf_t *conf, conn_t *sock )
return -1;
}
trusted = (STACK_OF(X509_OBJECT) *)sock->conf->trusted_certs;
for (i = 0; i < sk_X509_OBJECT_num( trusted ); i++) {
if (!X509_cmp( cert, X509_OBJECT_get0_X509( sk_X509_OBJECT_value( trusted, i ) ) )) {
for (i = 0; i < sk_X509_num( sock->conf->trusted_certs ); i++) {
if (!X509_cmp( cert, sk_X509_value( sock->conf->trusted_certs, i ) )) {
X509_free( cert );
return 0;
}
@ -273,11 +271,33 @@ DIAG_POP
return 0;
}
if (conf->cert_file && !SSL_CTX_load_verify_locations( mconf->SSLContext, conf->cert_file, NULL )) {
if (!(mconf->trusted_certs = sk_X509_new_null()))
oom();
if (conf->cert_file) {
X509_STORE *store;
if (!(store = X509_STORE_new()))
oom();
if (!X509_STORE_load_locations( store, conf->cert_file, NULL )) {
print_ssl_errors( "loading certificate file '%s'", conf->cert_file );
return 0;
}
mconf->trusted_certs = (_STACK *)sk_X509_OBJECT_dup( X509_STORE_get0_objects( SSL_CTX_get_cert_store( mconf->SSLContext ) ) );
STACK_OF(X509_OBJECT) *objs = X509_STORE_get0_objects( store );
for (int i = 0; i < sk_X509_OBJECT_num( objs ); i++) {
X509 *cert = X509_OBJECT_get0_X509( sk_X509_OBJECT_value( objs, i ) );
if (cert) {
if (X509_check_ca( cert )) {
if (!X509_STORE_add_cert( SSL_CTX_get_cert_store( mconf->SSLContext ), cert ))
oom();
} else {
X509_up_ref( cert ); // Locking failure assumed impossible
if (!sk_X509_push( mconf->trusted_certs, cert ))
oom();
}
}
}
X509_STORE_free( store );
}
if (mconf->system_certs && !SSL_CTX_set_default_verify_paths( mconf->SSLContext )) {
ulong err;
while ((err = ERR_get_error()))

3
src/socket.h
View File

@ -31,6 +31,7 @@
#ifdef HAVE_LIBSSL
# include <openssl/ssl.h>
# include <openssl/x509.h>
enum {
TLSv1 = 4,
@ -55,7 +56,7 @@ typedef struct {
/* these are actually variables and are leaked at the end */
char ssl_ctx_valid;
_STACK *trusted_certs;
STACK_OF(X509) *trusted_certs;
SSL_CTX *SSLContext;
#endif
} server_conf_t;

2
src/util.c
View File

@ -353,7 +353,7 @@ nfsnprintf( char *buf, int blen, const char *fmt, ... )
return ret;
}
static void ATTR_NORETURN
void
oom( void )
{
fputs( "Fatal: Out of memory\n", stderr );