Export (0) Print
Expand All

2.3.6.1 RC4 Encryption Header

Office

The encryption header used for RC4 encryption is specified as shown in the following diagram.


0


1


2


3


4


5


6


7


8


9

1
0


1


2


3


4


5


6


7


8


9

2
0


1


2


3


4


5


6


7


8


9

3
0


1

EncryptionVersionInfo

Salt (16 bytes)

...

...

EncryptedVerifier (16 bytes)

...

...

EncryptedVerifierHash (16 bytes)

...

...

EncryptionVersionInfo (4 bytes): A Version structure (section 2.1.4), where Version.vMajor MUST be 0x0001 and Version.vMinor MUST be 0x0001.

Salt (16 bytes): A randomly generated array of bytes that specifies the salt value used during password hash generation. It MUST NOT be the same data used for the verifier stored encrypted in the EncryptedVerifier field.

EncryptedVerifier (16 bytes): An additional 16-byte verifier encrypted using a 40-bit RC4 cipher initialized as specified in section 2.3.6.2, with a block number of 0x00000000.

EncryptedVerifierHash (16 bytes): A 40-bit RC4 encrypted MD5 hash of the verifier used to generate the EncryptedVerifier field.

Show:
© 2016 Microsoft