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fixed free memory

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This commit is contained in:
merlokk 2017-12-19 11:25:33 +02:00
commit b74905f63b
3 changed files with 58 additions and 8 deletions
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6
client/emv/crypto_polarssl.c
View file

@ -66,11 +66,11 @@ static size_t crypto_hash_polarssl_get_size(const struct crypto_hash *ch)
static struct crypto_hash *crypto_hash_polarssl_open(enum crypto_algo_hash hash)
{
struct crypto_hash_polarssl *ch = malloc(sizeof(*ch));
if (hash != HASH_SHA_1)
return NULL;
struct crypto_hash_polarssl *ch = malloc(sizeof(*ch));
sha1_starts(&(ch->ctx));
ch->ch.write = crypto_hash_polarssl_write;

4
client/emv/emv_pki_priv.c
View file

@ -57,8 +57,10 @@ struct emv_pk *emv_pki_make_ca(const struct crypto_pk *cp,
free(exp);
struct crypto_hash *ch = crypto_hash_open(pk->hash_algo);
if (!ch)
if (!ch) {
emv_pk_free(pk);
return false;
}
crypto_hash_write(ch, pk->rid, sizeof(pk->rid));
crypto_hash_write(ch, &pk->index, 1);

56
client/emv/emvcore.c
View file

@ -494,6 +494,7 @@ int trSDA(struct tlvdb *tlv) {
struct emv_pk *issuer_pk = emv_pki_recover_issuer_cert(pk, tlv);
if (!issuer_pk) {
emv_pk_free(pk);
PrintAndLog("ERROR: Issuer certificate not found. Exit.");
return 2;
}
@ -512,6 +513,8 @@ int trSDA(struct tlvdb *tlv) {
const struct tlv *sda_tlv = tlvdb_get(tlv, 0x21, NULL);
if (!sda_tlv || sda_tlv->len < 1) {
emv_pk_free(issuer_pk);
emv_pk_free(pk);
PrintAndLog("ERROR: Can't find input list for Offline Data Authentication. Exit.");
return 3;
}
@ -522,10 +525,14 @@ int trSDA(struct tlvdb *tlv) {
PrintAndLog("SDA verified OK. (%02hhx:%02hhx)\n", dac_tlv->value[0], dac_tlv->value[1]);
tlvdb_add(tlv, dac_db);
} else {
emv_pk_free(issuer_pk);
emv_pk_free(pk);
PrintAndLog("ERROR: SSAD verify error");
return 4;
}
emv_pk_free(issuer_pk);
emv_pk_free(pk);
return 0;
}
@ -545,12 +552,14 @@ int trDDA(bool decodeTLV, struct tlvdb *tlv) {
const struct tlv *sda_tlv = tlvdb_get(tlv, 0x21, NULL);
if (!sda_tlv || sda_tlv->len < 1) {
emv_pk_free(pk);
PrintAndLog("ERROR: Can't find input list for Offline Data Authentication. Exit.");
return 3;
}
struct emv_pk *issuer_pk = emv_pki_recover_issuer_cert(pk, tlv);
if (!issuer_pk) {
emv_pk_free(pk);
PrintAndLog("ERROR: Issuer certificate not found. Exit.");
return 2;
}
@ -568,6 +577,8 @@ int trDDA(bool decodeTLV, struct tlvdb *tlv) {
struct emv_pk *icc_pk = emv_pki_recover_icc_cert(issuer_pk, tlv, sda_tlv);
if (!icc_pk) {
emv_pk_free(pk);
emv_pk_free(issuer_pk);
PrintAndLog("ERROR: ICC setrificate not found. Exit.");
return 2;
}
@ -600,7 +611,6 @@ int trDDA(bool decodeTLV, struct tlvdb *tlv) {
);
}
struct tlv *ddol_data_tlv = NULL;
// 9F4B: Signed Dynamic Application Data
const struct tlv *sdad_tlv = tlvdb_get(tlv, 0x9f4b, NULL);
// DDA with internal authenticate OR fDDA with filled 0x9F4B tag (GPO result)
@ -609,9 +619,11 @@ int trDDA(bool decodeTLV, struct tlvdb *tlv) {
PrintAndLog("\n* * Got Signed Dynamic Application Data (9F4B) form GPO. Maybe fDDA...");
const struct tlvdb *atc_db = emv_pki_recover_atc_ex(icc_pk, tlv, true);
free(ddol_data_tlv);
if (!atc_db) {
PrintAndLog("ERROR: Can't recover IDN (ICC Dynamic Number)");
emv_pk_free(pk);
emv_pk_free(issuer_pk);
emv_pk_free(icc_pk);
return 8;
}
@ -629,6 +641,9 @@ int trDDA(bool decodeTLV, struct tlvdb *tlv) {
}
} else {
PrintAndLog("\nERROR: fDDA (fast DDA) verify error");
emv_pk_free(pk);
emv_pk_free(issuer_pk);
emv_pk_free(icc_pk);
return 9;
}
} else {
@ -639,6 +654,9 @@ int trDDA(bool decodeTLV, struct tlvdb *tlv) {
tlvdb_add(tlv, dac_db);
} else {
PrintAndLog("ERROR: SSAD verify error");
emv_pk_free(pk);
emv_pk_free(issuer_pk);
emv_pk_free(icc_pk);
return 4;
}
@ -649,9 +667,12 @@ int trDDA(bool decodeTLV, struct tlvdb *tlv) {
PrintAndLog("DDOL [9f49] not found. Using default DDOL");
}
ddol_data_tlv = dol_process(ddol_tlv, tlv, 0);
struct tlv *ddol_data_tlv = dol_process(ddol_tlv, tlv, 0);
if (!ddol_data_tlv) {
PrintAndLog("ERROR: Can't create DDOL TLV");
emv_pk_free(pk);
emv_pk_free(issuer_pk);
emv_pk_free(icc_pk);
return 5;
}
@ -661,6 +682,10 @@ int trDDA(bool decodeTLV, struct tlvdb *tlv) {
int res = EMVInternalAuthenticate(true, (uint8_t *)ddol_data_tlv->value, ddol_data_tlv->len, buf, sizeof(buf), &len, &sw, NULL);
if (res) {
PrintAndLog("Internal Authenticate error(%d): %4x. Exit...", res, sw);
free(ddol_data_tlv);
emv_pk_free(pk);
emv_pk_free(issuer_pk);
emv_pk_free(icc_pk);
return 6;
}
@ -681,6 +706,10 @@ int trDDA(bool decodeTLV, struct tlvdb *tlv) {
dda_db = tlvdb_parse_multi(buf, len);
if(!dda_db) {
PrintAndLog("ERROR: Can't parse Internal Authenticate result as TLV");
free(ddol_data_tlv);
emv_pk_free(pk);
emv_pk_free(issuer_pk);
emv_pk_free(icc_pk);
return 7;
}
tlvdb_add(tlv, dda_db);
@ -694,6 +723,9 @@ int trDDA(bool decodeTLV, struct tlvdb *tlv) {
if (!idn_db) {
PrintAndLog("ERROR: Can't recover IDN (ICC Dynamic Number)");
tlvdb_free(dda_db);
emv_pk_free(pk);
emv_pk_free(issuer_pk);
emv_pk_free(icc_pk);
return 8;
}
tlvdb_free(dda_db);
@ -708,10 +740,17 @@ int trDDA(bool decodeTLV, struct tlvdb *tlv) {
} else {
PrintAndLog("\nERROR: DDA verify error");
tlvdb_free(idn_db);
emv_pk_free(pk);
emv_pk_free(issuer_pk);
emv_pk_free(icc_pk);
return 9;
}
}
emv_pk_free(pk);
emv_pk_free(issuer_pk);
emv_pk_free(icc_pk);
return 0;
}
@ -726,12 +765,14 @@ int trCDA(struct tlvdb *tlv, struct tlvdb *ac_tlv, struct tlv *pdol_data_tlv, st
const struct tlv *sda_tlv = tlvdb_get(tlv, 0x21, NULL);
if (!sda_tlv || sda_tlv->len < 1) {
PrintAndLog("ERROR: Can't find input list for Offline Data Authentication. Exit.");
emv_pk_free(pk);
return 3;
}
struct emv_pk *issuer_pk = emv_pki_recover_issuer_cert(pk, tlv);
if (!issuer_pk) {
PrintAndLog("ERROR: Issuer certificate not found. Exit.");
emv_pk_free(pk);
return 2;
}
printf("Issuer PK recovered. RID %02hhx:%02hhx:%02hhx:%02hhx:%02hhx IDX %02hhx CSN %02hhx:%02hhx:%02hhx\n",
@ -749,6 +790,8 @@ int trCDA(struct tlvdb *tlv, struct tlvdb *ac_tlv, struct tlv *pdol_data_tlv, st
struct emv_pk *icc_pk = emv_pki_recover_icc_cert(issuer_pk, tlv, sda_tlv);
if (!icc_pk) {
PrintAndLog("ERROR: ICC setrificate not found. Exit.");
emv_pk_free(pk);
emv_pk_free(issuer_pk);
return 2;
}
printf("ICC PK recovered. RID %02hhx:%02hhx:%02hhx:%02hhx:%02hhx IDX %02hhx CSN %02hhx:%02hhx:%02hhx\n",
@ -770,6 +813,9 @@ int trCDA(struct tlvdb *tlv, struct tlvdb *ac_tlv, struct tlv *pdol_data_tlv, st
tlvdb_add(tlv, dac_db);
} else {
PrintAndLog("ERROR: SSAD verify error");
emv_pk_free(pk);
emv_pk_free(issuer_pk);
emv_pk_free(icc_pk);
return 4;
}
@ -788,6 +834,8 @@ int trCDA(struct tlvdb *tlv, struct tlvdb *ac_tlv, struct tlv *pdol_data_tlv, st
PrintAndLog("\nERROR: CDA verify error");
}
emv_pk_free(pk);
emv_pk_free(issuer_pk);
emv_pk_free(icc_pk);
return 0;
}