PwdHistory attribute holds a history of previously used passwords. Values of this attribute are transmitted in string format as given by the following ABNF:

pwdHistory = time "#" syntaxOID "#" length "#" data time = GeneralizedTime

syntaxOID = numericoid ; the string representation of the

  • dotted-decimal OID that defines the
  • syntax used to store the password.

length = number ; the number of octets in data.

data = <octets representing the password in the format specified by syntaxOID>.

This format allows the server to store, and transmit a history of passwords that have been used. In order for equality matching to function properly, the time field needs to adhere to a consistent format. For this purpose, the time field MUST be in GMT format.

PwdHistory is defined as

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