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| author | Chia-chi Yeh <chiachi@android.com> | 2009-12-30 10:38:39 +0800 |
|---|---|---|
| committer | Chia-chi Yeh <chiachi@android.com> | 2009-12-30 10:38:39 +0800 |
| commit | b78679e18db941fa0c104d728db128cf9ee21dc7 (patch) | |
| tree | 8ddb03e837ac7663992df244c637007e69c3269e /cmds | |
| parent | 872db948a0366cc4d47cd4cd343f625a206b2eed (diff) | |
| download | frameworks_native-b78679e18db941fa0c104d728db128cf9ee21dc7.zip frameworks_native-b78679e18db941fa0c104d728db128cf9ee21dc7.tar.gz frameworks_native-b78679e18db941fa0c104d728db128cf9ee21dc7.tar.bz2 | |
keystore: compute the padding in an intuitive way.
Diffstat (limited to 'cmds')
| -rw-r--r-- | cmds/keystore/keystore.c | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/cmds/keystore/keystore.c b/cmds/keystore/keystore.c index 37155e4..4426874 100644 --- a/cmds/keystore/keystore.c +++ b/cmds/keystore/keystore.c @@ -170,16 +170,12 @@ static int8_t encrypt_blob(char *name, AES_KEY *aes_key) return SYSTEM_ERROR; } - length = (blob.length + blob.value - blob.encrypted) % AES_BLOCK_SIZE; - if (length) { - length = AES_BLOCK_SIZE - length; - } + length = blob.length + blob.value - blob.encrypted; + length = (length + AES_BLOCK_SIZE - 1) / AES_BLOCK_SIZE * AES_BLOCK_SIZE; - length += blob.length + blob.value - blob.digested; blob.length = htonl(blob.length); - MD5(blob.digested, length, blob.digest); + MD5(blob.digested, length - (blob.digested - blob.encrypted), blob.digest); - length += blob.digested - blob.encrypted; memcpy(vector, blob.vector, AES_BLOCK_SIZE); AES_cbc_encrypt(blob.encrypted, blob.encrypted, length, aes_key, vector, AES_ENCRYPT); |