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ITS#5991 build cert chain, GnuTLS doesn't do it for us

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This commit is contained in:
Howard Chu 2009-03-05 08:04:49 +00:00
parent 54ed3779d6
commit 9bc829dbef
1 changed files with 73 additions and 4 deletions
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77
libraries/libldap/tls_g.c
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@ -35,6 +35,8 @@
#include <ac/unistd.h>
#include <ac/param.h>
#include <ac/dirent.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "ldap-int.h"
#include "ldap-tls.h"
@ -290,6 +292,31 @@ tlsg_ctx_free ( tls_ctx *ctx )
ber_memfree ( c );
}
static int
tlsg_getfile( const char *path, gnutls_datum_t *buf )
{
int rc = -1, fd;
struct stat st;
fd = open( path, O_RDONLY );
if ( fd >= 0 && fstat( fd, &st ) == 0 ) {
buf->size = st.st_size;
buf->data = LDAP_MALLOC( st.st_size + 1 );
if ( buf->data ) {
rc = read( fd, buf->data, st.st_size );
close( fd );
if ( rc < st.st_size )
rc = -1;
else
rc = 0;
}
}
return rc;
}
/* This is the GnuTLS default */
#define VERIFY_DEPTH 6
/*
* initialize a new TLS context
*/
@ -322,11 +349,53 @@ tlsg_ctx_init( struct ldapoptions *lo, struct ldaptls *lt, int is_server )
}
if ( lo->ldo_tls_certfile && lo->ldo_tls_keyfile ) {
rc = gnutls_certificate_set_x509_key_file(
ctx->cred,
lt->lt_certfile,
lt->lt_keyfile,
gnutls_x509_privkey_t key;
gnutls_datum_t buf;
gnutls_x509_crt_t certs[VERIFY_DEPTH];
unsigned int max = VERIFY_DEPTH;
/* OpenSSL builds the cert chain for us, but GnuTLS
* expects it to be present in the certfile. If it's
* not, we have to build it ourselves. So we have to
* do some special checks here...
*/
rc = tlsg_getfile( lt->lt_keyfile, &buf );
if ( rc ) return -1;
rc = gnutls_x509_privkey_import( key, &buf,
GNUTLS_X509_FMT_PEM );
LDAP_FREE( buf.data );
if ( rc < 0 ) return rc;
rc = tlsg_getfile( lt->lt_certfile, &buf );
if ( rc ) return -1;
rc = gnutls_x509_crt_list_import( certs, &max, &buf,
GNUTLS_X509_FMT_PEM, 0 );
LDAP_FREE( buf.data );
if ( rc < 0 ) return rc;
/* If there's only one cert and it's not self-signed,
* then we have to build the cert chain.
*/
if ( max == 1 && !gnutls_x509_crt_check_issuer( certs[0], certs[0] )) {
gnutls_x509_crt_t *cas;
unsigned int i, j = 0, ncas;
gnutls_certificate_get_x509_cas( ctx->cred, &cas, &ncas );
for ( i = 1; i<VERIFY_DEPTH; i++ ) {
for ( j = 0; j<ncas; j++ ) {
if ( gnutls_x509_crt_check_issuer( certs[i-1], cas[j] )) {
certs[i] = cas[j];
if ( gnutls_x509_crt_check_issuer( cas[j], cas[j] ))
j = ncas;
break;
}
}
if ( j == ncas )
break;
}
max = i+1;
}
rc = gnutls_certificate_set_x509_key( ctx->cred, certs, max, key );
if ( rc ) return -1;
} else if ( lo->ldo_tls_certfile || lo->ldo_tls_keyfile ) {
Debug( LDAP_DEBUG_ANY,