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Clear after aes encrypt/decrypt

This commit is contained in:
kdeme 2020-06-09 10:59:52 +02:00
parent 1e1fd70649
commit 67decc3a85
1 changed files with 2 additions and 0 deletions
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eth/p2p/rlpx_protocols/whisper/whisper_types.nim
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@ -199,6 +199,7 @@ proc encryptAesGcm(plain: openarray[byte], key: SymKey,
gcm.encrypt(plain, result)
var tag: array[gcmTagLen, byte]
gcm.getTag(tag)
gcm.clear()
result.add tag
result.add iv
@ -217,6 +218,7 @@ proc decryptAesGcm(cipher: openarray[byte], key: SymKey): Option[seq[byte]] =
gcm.decrypt(cipher[0 ..< ^(gcmIVLen + gcmTagLen)], res)
var tag2: array[gcmTagLen, byte]
gcm.getTag(tag2)
gcm.clear()
if tag != tag2:
debug "cipher tag mismatch", len = cipher.len, tag, tag2