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Fix ManagedAuthenticatedEncryptor not round-tripping payloads properly.

This commit is contained in:
Levi B 2014-10-22 11:45:39 -07:00
parent 76b76ba099
commit bd529b3b5b
1 changed files with 2 additions and 2 deletions
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4
src/Microsoft.AspNet.Security.DataProtection/Managed/ManagedAuthenticatedEncryptor.cs
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@ -49,7 +49,7 @@ namespace Microsoft.AspNet.Security.DataProtection.Managed
CryptoUtil.Assert(KEY_MODIFIER_SIZE_IN_BYTES <= symmetricAlgorithmKeySizeInBytes && symmetricAlgorithmKeySizeInBytes <= Constants.MAX_STACKALLOC_BYTES,
"KEY_MODIFIER_SIZE_IN_BYTES <= symmetricAlgorithmKeySizeInBytes && symmetricAlgorithmKeySizeInBytes <= Constants.MAX_STACKALLOC_BYTES");
_genRandom = _genRandom ?? ManagedGenRandomImpl.Instance;
_genRandom = genRandom ?? ManagedGenRandomImpl.Instance;
_keyDerivationKey = keyDerivationKey;
// Validate that the symmetric algorithm has the properties we require
@ -302,7 +302,7 @@ namespace Microsoft.AspNet.Security.DataProtection.Managed
// Step 1: Generate a random key modifier and IV for this operation.
// Both will be equal to the block size of the block cipher algorithm.
byte[] keyModifier = _genRandom.GenRandom(_symmetricAlgorithmSubkeyLengthInBytes);
byte[] keyModifier = _genRandom.GenRandom(KEY_MODIFIER_SIZE_IN_BYTES);
byte[] iv = _genRandom.GenRandom(_symmetricAlgorithmBlockSizeInBytes);
// Step 2: Copy the key modifier and the IV to the output stream since they'll act as a header.