From 2b3ff6319e2312656fbefe0209bef02d58b6836a Mon Sep 17 00:00:00 2001 From: Mimi Zohar Date: Tue, 20 Sep 2011 11:23:55 -0400 Subject: 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 Acked-by: Andy Shevchenko --- security/keys/encrypted-keys/encrypted.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/security/keys/encrypted-keys/encrypted.c b/security/keys/encrypted-keys/encrypted.c index 3f577954b85a..f33804c1b4c8 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)) -- cgit v1.2.1