For each character in the password:įor every bit in the character, starting with the least significant and progressing to (but excluding) the most significant, if the bit is set, XOR the key’s high-order word with the corresponding word from the encryption matrixĬompute the low-order word of the new key:įor each character in the password, going backwards, low-order word = (((low-order word SHR 14) AND 0x0001) OR (low-order word SHL 1) AND 0x7FFF)) XOR character Initialize from the initial code array (see below), depending on the password’s length. Otherwise, take the high byte.įrom now on, the single-byte character string is used.Ĭompute the high-order word of the new key: For each character, if the low byte is not equal to 0, take it. Get the single-byte values by iterating through the Unicode characters of the truncated password. When a password is supplied via an application which shall be hashed and stored in this element, that process shall be done in two stages:įirst, the password shall be hashed using the following algorithm:Ĭonstruct a new NULL-terminated string consisting of single-byte characters: If this element is omitted, then no protection shall be applied to this document. This protection is not intended as a security feature and may be ignored. Document protection is a set of restrictions used to prevent unintentional changes to all or part of a WordprocessingML document - since this protection does not encrypt the document, malicious applications may circumvent its use. These restrictions shall be enforced by applications editing this document when the attribute is turned on, and should be ignored (but persisted) otherwise. This element specifies the set of document protection restrictions which have been applied to the contents of a WordprocessingML document. Preprocessing Model for Markup Consumption.Markup Compatibility Attributes and Elements.Part 5: Markup Compatibility and Extensibility.Example Predefined DrawingML Shape and Text Geometries.Predefined SpreadsheetML Style Definitions.Resolving Unicode Strings to Part Names.Structure of an Office Open XML Document.

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