giomba
/
opensc
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

prevent out of bounds write 

fixes https://oss-fuzz.com/testcase-detail/5226571123392512
This commit is contained in:
Frank Morgner 2020-06-04 10:04:10 +02:00
parent 55fd3db2b5
commit 9d294de90d
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
src/libopensc/card-tcos.c
View File

@ -623,6 +623,8 @@ static int tcos_decipher(sc_card_t *card, const u8 * crgram, size_t crgram_len,
apdu.data = sbuf;
apdu.lc = apdu.datalen = crgram_len+1;
sbuf[0] = tcos3 ? 0x00 : ((data->pad_flags & SC_ALGORITHM_RSA_PAD_PKCS1) ? 0x81 : 0x02);
if (sizeof sbuf - 1 < crgram_len)
return SC_ERROR_INVALID_ARGUMENTS;
memcpy(sbuf+1, crgram, crgram_len);
r = sc_transmit_apdu(card, &apdu);