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ISO 7816: if decrypting with 2048 keys, non-extended APDU cards require command chaining (Lc would be 257, which is 2 bytes over 255 limit) 

git-svn-id: https://www.opensc-project.org/svnp/opensc/trunk@4895 c6295689-39f2-0310-b995-f0e70906c6a9
This commit is contained in:
martin 2010-11-29 14:22:15 +00:00
parent b33a44fdf0
commit 5d9c02b197
1 changed files with 4 additions and 1 deletions
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5
src/libopensc/iso7816.c
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@ -828,11 +828,14 @@ static int iso7816_decipher(sc_card_t *card,
* to tell the card the we want everything available (note: we
* always have Le <= crgram_len) */
apdu.le = (outlen >= 256 && crgram_len < 256) ? 256 : outlen;
/* Use APDU chaining with 2048bit RSA keys if the card does not do extended APDU-s */
if ((crgram_len+1 > 255) && !(card->caps & SC_CARD_CAP_APDU_EXT))
apdu.flags |= SC_APDU_FLAGS_CHAINING;
sbuf[0] = 0; /* padding indicator byte, 0x00 = No further indication */
memcpy(sbuf + 1, crgram, crgram_len);
apdu.data = sbuf;
apdu.lc = crgram_len + 1;
apdu.lc = crgram_len + 1;
apdu.datalen = crgram_len + 1;
r = sc_transmit_apdu(card, &apdu);
sc_mem_clear(sbuf, crgram_len + 1);