CACKey
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Comment:Fixed issues with padding
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SHA1: 66507306f5956ac2f95f1957d5c737097248a57b
User & Date: rkeene on 2010-05-17 19:43:12
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Context
2010-05-17
19:53
Updated to treat a request of read of 0 bytes as a no-op. check-in: 45212cc4ca user: rkeene tags: trunk
19:43
Fixed issues with padding check-in: 66507306f5 user: rkeene tags: trunk
19:37
Updated to support determining key size from X.509 object (untested)

Updated to set HW TOKEN flag

Updated to pad sign/decrypt message to key size (untested) check-in: a2ac84031e user: rkeene tags: trunk

Changes
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Modified cackey.c from [e6d26b97df] to [64d4505a46].

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 *     ...
 *
 */
static ssize_t cackey_signdecrypt(struct cackey_slot *slot, struct cackey_identity *identity, unsigned char *buf, size_t buflen, unsigned char *outbuf, size_t outbuflen) {
	unsigned char *tmpbuf, *tmpbuf_s;
	unsigned char bytes_to_send, p1;
	cackey_ret send_ret;
	uint16_t respcode;
	size_t tmpbuflen, padlen;
	int free_tmpbuf = 0;
	int le;

	CACKEY_DEBUG_PRINTF("Called.");

	if (buflen > 255) {
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			free_tmpbuf = 1;

			padlen = tmpbuflen - buflen - 3;

			tmpbuf[0] = 0x00;
			tmpbuf[1] = 0x01;
			memset(&tmpbuf[2], 0xFF, padlen);
			tmpbuf[padlen]= 0x00;
			memcpy(&tmpbuf[padlen + 1], buf, buflen);
			tmpbuf[padlen + 2]= 0x00;
			memcpy(&tmpbuf[padlen + 3], buf, buflen);

			CACKEY_DEBUG_PRINTBUF("Unpadded:", buf, buflen);
			CACKEY_DEBUG_PRINTBUF("Padded:", tmpbuf, tmpbuflen);
		} else {
			tmpbuf = buf;
			tmpbuflen = buflen;
			free_tmpbuf = 0;
			padlen = 0;
		}
	} else {
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			bytes_to_send = 245;
			p1 = 0x80;
		} else {
			bytes_to_send = tmpbuflen;
			p1 = 0x00;
		}

		send_ret = cackey_send_apdu(slot, GSCIS_CLASS_GLOBAL_PLATFORM, GSCIS_INSTR_SIGNDECRYPT, p1, 0x00, bytes_to_send, tmpbuf, le, NULL, outbuf, &outbuflen);
		send_ret = cackey_send_apdu(slot, GSCIS_CLASS_GLOBAL_PLATFORM, GSCIS_INSTR_SIGNDECRYPT, p1, 0x00, bytes_to_send, tmpbuf, le, &respcode, outbuf, &outbuflen);
		if (send_ret != CACKEY_PCSC_S_OK) {
			CACKEY_DEBUG_PRINTF("ADPU Sending Failed -- returning in error.");

			if (respcode == 0x6982) {
				CACKEY_DEBUG_PRINTF("Security status not satisified.");
			}

			if (free_tmpbuf) {
				if (tmpbuf_s) {
					free(tmpbuf_s);
				}
			}
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