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eapol: Stricter length check in eapol_decrypt_key_data

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The plaintext key_data + padding must be at least 16 bytes so the
AES-encrypted key_data must be at least 24 bytes.
This commit is contained in:
Andrew Zaborowski 2017-08-31 04:04:49 +02:00 committed by Denis Kenzior
parent a0cde90814
commit 092ede1147
1 changed files with 1 additions and 1 deletions
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src/eapol.c
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@ -292,7 +292,7 @@ uint8_t *eapol_decrypt_key_data(const uint8_t *kek,
} }
case EAPOL_KEY_DESCRIPTOR_VERSION_HMAC_SHA1_AES: case EAPOL_KEY_DESCRIPTOR_VERSION_HMAC_SHA1_AES:
case EAPOL_KEY_DESCRIPTOR_VERSION_AES_128_CMAC_AES: case EAPOL_KEY_DESCRIPTOR_VERSION_AES_128_CMAC_AES:
if (key_data_len < 8 || key_data_len % 8) if (key_data_len < 24 || key_data_len % 8)
goto error; goto error;
if (!aes_unwrap(kek, key_data, key_data_len, buf)) if (!aes_unwrap(kek, key_data, key_data_len, buf))