X-Git-Url: https://git.saurik.com/apple/security.git/blobdiff_plain/5dd5f9ec28f304ca377c42fd7f711d6cf12b90e1..5c19dc3ae3bd8e40a9c028b0deddd50ff337692c:/OSX/libsecurityd/lib/sec_xdr_sizeof.c diff --git a/OSX/libsecurityd/lib/sec_xdr_sizeof.c b/OSX/libsecurityd/lib/sec_xdr_sizeof.c new file mode 100644 index 00000000..1d876101 --- /dev/null +++ b/OSX/libsecurityd/lib/sec_xdr_sizeof.c @@ -0,0 +1,217 @@ +/* + * Copyright (c) 2006,2011-2014 Apple Inc. All Rights Reserved. + * + * @APPLE_LICENSE_HEADER_START@ + * + * This file contains Original Code and/or Modifications of Original Code + * as defined in and that are subject to the Apple Public Source License + * Version 2.0 (the 'License'). You may not use this file except in + * compliance with the License. Please obtain a copy of the License at + * http://www.opensource.apple.com/apsl/ and read it before using this + * file. + * + * The Original Code and all software distributed under the License are + * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER + * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, + * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. + * Please see the License for the specific language governing rights and + * limitations under the License. + * + * @APPLE_LICENSE_HEADER_END@ + */ + +/* + * Sun RPC is a product of Sun Microsystems, Inc. and is provided for + * unrestricted use provided that this legend is included on all tape + * media and as a part of the software program in whole or part. Users + * may copy or modify Sun RPC without charge, but are not authorized + * to license or distribute it to anyone else except as part of a product or + * program developed by the user. + * + * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE + * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR + * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. + * + * Sun RPC is provided with no support and without any obligation on the + * part of Sun Microsystems, Inc. to assist in its use, correction, + * modification or enhancement. + * + * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE + * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC + * OR ANY PART THEREOF. + * + * In no event will Sun Microsystems, Inc. be liable for any lost revenue + * or profits or other special, indirect and consequential damages, even if + * Sun has been advised of the possibility of such damages. + * + * Sun Microsystems, Inc. + * 2550 Garcia Avenue + * Mountain View, California 94043 + */ +/* + * xdr_sizeof.c + * + * Copyright 1990 Sun Microsystems, Inc. + * + * General purpose routine to see how much space something will use + * when serialized using XDR. + */ +#include + +#include "sec_xdr.h" + +/* ARGSUSED */ +static bool_t +sec_x_putlong(xdrs, intp) + XDR *xdrs; + int *intp; +{ + xdrs->x_handy += BYTES_PER_XDR_UNIT; + return (TRUE); +} + +/* ARGSUSED */ +static bool_t +sec_x_putbytes(xdrs, bp, len) + XDR *xdrs; + char *bp; + u_int len; +{ + xdrs->x_handy += len; + return (TRUE); +} + +static u_int +sec_x_getpostn(xdrs) + XDR *xdrs; +{ + return (xdrs->x_handy); +} + +/* ARGSUSED */ +static bool_t +sec_x_setpostn(xdrs, pos) + XDR *xdrs; + u_int pos; +{ + /* This is not allowed */ + return (FALSE); +} + +static int32_t * +sec_x_inline(xdrs, len) + XDR *xdrs; + u_int len; +{ + intptr_t llen; + + if (len == 0) { + return (NULL); + } + + if (xdrs->x_op != XDR_ENCODE) { + return (NULL); + } + + llen = len; + + if (llen < (intptr_t)xdrs->x_base) { + /* x_private was already allocated */ + xdrs->x_handy += llen; + return ((int32_t *) xdrs->x_private); + } else { + /* Free the earlier space and allocate new area */ + if (xdrs->x_private) + free(xdrs->x_private); + if ((xdrs->x_private = (caddr_t) malloc(len)) == NULL) { + xdrs->x_base = 0; + return (NULL); + } + xdrs->x_base = (caddr_t)llen; + xdrs->x_handy += llen; + return ((int32_t *) xdrs->x_private); + } +} + +static int +sec_harmless() +{ + /* Always return FALSE/NULL, as the case may be */ + return (0); +} + +static void +sec_x_destroy(xdrs) + XDR *xdrs; +{ + xdrs->x_handy = 0; + xdrs->x_base = 0; + if (xdrs->x_private) { + free(xdrs->x_private); + xdrs->x_private = NULL; + } + return; +} + +u_int +sec_xdr_sizeof_in(func, data) + xdrproc_t func; + void *data; +{ + XDR x; + struct xdr_ops ops; + bool_t stat; + /* to stop ANSI-C compiler from complaining */ +#ifdef __LP64__ + typedef bool_t (* dummyfunc1)(XDR *, int *); +#else + typedef bool_t (* dummyfunc1)(XDR *, long *); +#endif + typedef bool_t (* dummyfunc2)(XDR *, caddr_t, u_int); + + ops.x_putlong = sec_x_putlong; + ops.x_putbytes = sec_x_putbytes; + ops.x_inline = sec_x_inline; + ops.x_getpostn = sec_x_getpostn; + ops.x_setpostn = sec_x_setpostn; + ops.x_destroy = sec_x_destroy; + + /* the other harmless ones */ + ops.x_getlong = (dummyfunc1) sec_harmless; + ops.x_getbytes = (dummyfunc2) sec_harmless; + + x.x_op = XDR_ENCODE; + x.x_ops = &ops; + x.x_handy = 0; + x.x_public = (caddr_t) NULL; // explicitly unsetting to avoid confusion with custom allocator + x.x_private = (caddr_t) NULL; + x.x_base = (caddr_t) 0; + + sec_xdr_arena_allocator_t size_alloc; + sec_xdr_arena_init_size_alloc(&size_alloc, &x); + stat = func(&x, data, 0); + if (x.x_private) + free(x.x_private); + return (stat == TRUE ? (unsigned) x.x_handy: 0); +} + +u_int +sec_xdr_sizeof_out(copy, size, func, data) + const void *copy; + u_int size; + xdrproc_t func; + void **data; +{ + XDR x; + bool_t stat; + + sec_xdrmem_create(&x, (void *)copy, size, XDR_DECODE); + + sec_xdr_arena_allocator_t size_alloc; + sec_xdr_arena_init_size_alloc(&size_alloc, &x); + stat = func(&x, data, 0); + if (size_alloc.data) + free(size_alloc.data); + return (stat == TRUE ? (u_int)size_alloc.offset : 0); +}