diff options
Diffstat (limited to '')
| -rw-r--r-- | scd/apdu.c | 37 |
1 files changed, 33 insertions, 4 deletions
diff --git a/scd/apdu.c b/scd/apdu.c index f86a63897..46d18b14b 100644 --- a/scd/apdu.c +++ b/scd/apdu.c @@ -363,9 +363,23 @@ static int pcsc_pinpad_modify (int slot, int class, int ins, int p0, int p1, /* - Helper + * Helper */ +/* Return true if (BUFFER,LENGTH) consists of only binary zeroes. */ +static int +all_zero_p (const void *buffer, size_t length) +{ + const unsigned char *p; + + for (p=buffer; length; p++, length--) + if (*p) + return 0; + return 1; +} + + + static int lock_slot (int slot) { @@ -2925,7 +2939,12 @@ send_le (int slot, int class, int ins, int p0, int p1, log_debug (" response: sw=%04X datalen=%d\n", sw, (unsigned int)resultlen); if ( !retbuf && (sw == SW_SUCCESS || (sw & 0xff00) == SW_MORE_DATA)) - log_printhex (result, resultlen, " dump: "); + { + if (all_zero_p (result, resultlen)) + log_debug (" dump: [all zero]\n"); + else + log_printhex (result, resultlen, " dump:"); + } } if (sw == SW_SUCCESS || sw == SW_EOF_REACHED) @@ -2998,7 +3017,12 @@ send_le (int slot, int class, int ins, int p0, int p1, log_debug (" more: sw=%04X datalen=%d\n", sw, (unsigned int)resultlen); if (!retbuf && (sw==SW_SUCCESS || (sw&0xff00)==SW_MORE_DATA)) - log_printhex (result, resultlen, " dump: "); + { + if (all_zero_p (result, resultlen)) + log_debug ( " dump: [all zero]\n"); + else + log_printhex (result, resultlen, " dump:"); + } } if ((sw & 0xff00) == SW_MORE_DATA @@ -3044,7 +3068,12 @@ send_le (int slot, int class, int ins, int p0, int p1, xfree (result_buffer); if (DBG_CARD_IO && retbuf && sw == SW_SUCCESS) - log_printhex (*retbuf, *retbuflen, " dump: "); + { + if (all_zero_p (*retbuf, *retbuflen)) + log_debug (" dump: [all zero]\n"); + else + log_printhex (*retbuf, *retbuflen, " dump:"); + } return sw; } |