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scd: pinpad workaround for PC/SC implementations.

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* scd/adpu.c (pcsc_pinpad_verify, pcsc_pinpad_modify): Bigger buffer
for TPDU card reader.

--

(backport from 2.1 commit 5e1d2fe655)

GnuPG-bug-id: 2003, 2004

This is needed for PC/SC on Debian Jessie.  Note that it's not only
for Cherry ST-2000, but also, for any TPDU card readers.
This commit is contained in:
NIIBE Yutaka 2015-06-23 10:10:15 +09:00
parent 9200bf1bab
commit 022719695e
1 changed files with 12 additions and 4 deletions
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16
scd/apdu.c
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@ -2252,8 +2252,16 @@ pcsc_pinpad_verify (int slot, int class, int ins, int p0, int p1,
int sw;
unsigned char *pin_verify;
int len = PIN_VERIFY_STRUCTURE_SIZE + pininfo->fixedlen;
unsigned char result[2];
pcsc_dword_t resultlen = 2;
/*
* The result buffer is only expected to have two-byte result on
* return. However, some implementation uses this buffer for lower
* layer too and it assumes that there is enough space for lower
* layer communication. Such an implementation fails for TPDU
* readers with "insufficient buffer", as it needs header and
* trailer. Six is the number for header + result + trailer (TPDU).
*/
unsigned char result[6];
pcsc_dword_t resultlen = 6;
int no_lc;
if (!reader_table[slot].atrlen
@ -2327,8 +2335,8 @@ pcsc_pinpad_modify (int slot, int class, int ins, int p0, int p1,
int sw;
unsigned char *pin_modify;
int len = PIN_MODIFY_STRUCTURE_SIZE + 2 * pininfo->fixedlen;
unsigned char result[2];
pcsc_dword_t resultlen = 2;
unsigned char result[6]; /* See the comment at pinpad_verify. */
pcsc_dword_t resultlen = 6;
int no_lc;
if (!reader_table[slot].atrlen