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fixed fuzzing build 

wrapping/unwrapping is hopefully correctly initialized
This commit is contained in:
Frank Morgner 2020-01-06 22:32:48 +01:00
parent 0b4b7fbaf0
commit 31169afb72
1 changed files with 9 additions and 3 deletions
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12
src/tests/fuzzing/fuzz_pkcs15_reader.c
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@ -233,21 +233,27 @@ int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)
int wrap_flags[] = {0, SC_ALGORITHM_AES_ECB, SC_ALGORITHM_AES_CBC_PAD,
SC_ALGORITHM_AES_CBC};
for (i = 0; i < sizeof wrap_flags/sizeof *wrap_flags; i++) {
/* see `pkcs15_create_secret_key` in
* `src/pkcs11/framework-pkc15.c` for creating a temporary
* secret key for wrapping/unwrapping */
unsigned long l = sizeof buf;
struct sc_pkcs15_object target_key;
struct sc_pkcs15_skey_info skey_info;
uint16_t len;
memset(&target_key, 0, sizeof target_key);
memset(&skey_info, 0, sizeof skey_info);
target_key.type = SC_PKCS15_TYPE_SKEY;
target_key.flags = 2; /* TODO not sure what these mean */
target_key.session_object = 1;
target_key.data = skey_info;
skey_info.usage = (unsigned int) args.usage;
target_key.data = &skey_info;
skey_info.usage = SC_PKCS15_PRKEY_USAGE_UNWRAP | SC_PKCS15_PRKEY_USAGE_WRAP
| SC_PKCS15_PRKEY_USAGE_ENCRYPT | SC_PKCS15_PRKEY_USAGE_DECRYPT;
skey_info.native = 0; /* card can not use this */
skey_info.access_flags = 0; /* looks like not needed */
skey_info.key_type = 0x1fUL; /* CKK_AES */
skey_info.value_len = 128;
fuzz_get_chunk(reader, &skey_info.data.value, &skey_info.data.len);
fuzz_get_chunk(reader, (const u8 **) &skey_info.data.value, &len);
skey_info.data.len = len;
sc_pkcs15_unwrap(p15card, obj, &target_key, wrap_flags[i],
in, in_len, param, param_len);