1. The user’s password as an OEM string is converted to uppercase.
2. This password is either null-padded or truncated to 14 bytes.
3. The “fixed-length” password is split into two 7-byte halves.
4. These values are used to create two DES keys, one from each 7-byte half.
5. Each of these keys is used to DES-encrypt the constant ASCII string “KGS!@#$%”, resulting in two 8-byte ciphertext values.
6. These two ciphertext values are concatenated to form a 16-byte value, which is the LM hash.
The hashes them self are sent in clear text over the network instead of sending the password in clear text.
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