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Code Activity

* app-p15.c (micardo_mse): New.

Browse source 
(do_sign): Call it.
* iso7816.c (iso7816_manage_security_env): Allow passing DATA as
NULL to indicate an empty Lc.
* tlv.c (find_tlv): Check that a found object fits into the
buffer.
(find_tlv_unchecked): New as replacement for the old non-checking
variant.
* app.c (select_application): Keep on using the non-checking
variant.
* app-openpgp.c (get_one_do, dump_all_do): Ditto.
This commit is contained in:
Werner Koch 2005-04-27 19:47:53 +00:00
parent f2fe118bfb
commit eb3f014b5d
7 changed files with 175 additions and 29 deletions
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23
scd/tlv.c
View file

@ -1,5 +1,5 @@
/* tlv.c - Tag-Length-Value Utilities
* Copyright (C) 2003, 2004 Free Software Foundation, Inc.
* Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
@ -113,17 +113,32 @@ do_find_tlv (const unsigned char *buffer, size_t length,
/* Locate a TLV encoded data object in BUFFER of LENGTH and
return a pointer to value as well as its length in NBYTES. Return
NULL if it was not found. Note, that the function does not check
whether the value fits into the provided buffer. */
NULL if it was not found or if the object does not fit into the buffer. */
const unsigned char *
find_tlv (const unsigned char *buffer, size_t length,
int tag, size_t *nbytes)
{
return do_find_tlv (buffer, length, tag, nbytes, 0);
const unsigned char *p;
p = do_find_tlv (buffer, length, tag, nbytes, 0);
if (p && *nbytes > (length - (p-buffer)))
p = NULL; /* Object longer than buffer. */
return p;
}
/* Locate a TLV encoded data object in BUFFER of LENGTH and
return a pointer to value as well as its length in NBYTES. Return
NULL if it was not found. Note, that the function does not check
whether the value fits into the provided buffer. */
const unsigned char *
find_tlv_unchecked (const unsigned char *buffer, size_t length,
int tag, size_t *nbytes)
{
return do_find_tlv (buffer, length, tag, nbytes, 0);
}
/* ASN.1 BER parser: Parse BUFFER of length SIZE and return the tag
and the length part from the TLV triplet. Update BUFFER and SIZE