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authorMimi Zohar <zohar@linux.vnet.ibm.com>2011-09-20 11:23:55 -0400
committerMimi Zohar <zohar@linux.vnet.ibm.com>2011-09-20 23:26:44 -0400
commit2b3ff6319e2312656fbefe0209bef02d58b6836a (patch)
tree43041b8a5e6fe31dadf2ad682d73fa873476b952 /security
parent2684bf7f29cfb13ef2c60f3b3a53ee47d0db7022 (diff)
downloadlinaro-lsk-2b3ff6319e2312656fbefe0209bef02d58b6836a.tar.gz
encrypted-keys: check hex2bin result
For each hex2bin call in encrypted keys, check that the ascii hex string is valid. On failure, return -EINVAL. Changelog v1: - hex2bin now returns an int Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com> Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Diffstat (limited to 'security')
-rw-r--r--security/keys/encrypted-keys/encrypted.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/security/keys/encrypted-keys/encrypted.c b/security/keys/encrypted-keys/encrypted.c
index 3f577954b85..f33804c1b4c 100644
--- a/security/keys/encrypted-keys/encrypted.c
+++ b/security/keys/encrypted-keys/encrypted.c
@@ -667,11 +667,19 @@ static int encrypted_key_decrypt(struct encrypted_key_payload *epayload,
return -EINVAL;
hex_encoded_data = hex_encoded_iv + (2 * ivsize) + 2;
- hex2bin(epayload->iv, hex_encoded_iv, ivsize);
- hex2bin(epayload->encrypted_data, hex_encoded_data, encrypted_datalen);
+ ret = hex2bin(epayload->iv, hex_encoded_iv, ivsize);
+ if (ret < 0)
+ return -EINVAL;
+ ret = hex2bin(epayload->encrypted_data, hex_encoded_data,
+ encrypted_datalen);
+ if (ret < 0)
+ return -EINVAL;
hmac = epayload->format + epayload->datablob_len;
- hex2bin(hmac, hex_encoded_data + (encrypted_datalen * 2), HASH_SIZE);
+ ret = hex2bin(hmac, hex_encoded_data + (encrypted_datalen * 2),
+ HASH_SIZE);
+ if (ret < 0)
+ return -EINVAL;
mkey = request_master_key(epayload, &master_key, &master_keylen);
if (IS_ERR(mkey))