PrintableString
{{Short description|Restricted character string type}}
A PrintableString is a restricted character string type in the ASN.1 notation.
It is used to describe data that consists only of a specific printable subset of the ASCII character set.
According to the ASN.1 Specification of basic notation,[http://www.itu.int/rec/T-REC-X.680-200811-I/en Information technology – Abstract Syntax Notation One (ASN.1): Specification of basic notation], ITU-T X.680, 07/2002 the character set of PrintableString can be expressed as:
| class="wikitable" style="text-align: center" | |||
| Name | Graphic | ASCII Code (DEC) | ASCII Code (HEX) |
|---|---|---|---|
| Latin capital letters | A,B, ... Z
|65 - 90 |41 - 5A | ||
| Latin small letters | a,b, ... z
|97 - 122 |61 - 7A | ||
| Numbers | 0,1, ... 9
|48 - 57 |30 - 39 | ||
| SPACE | (space)
|32 |20 | ||
| APOSTROPHE | '
|39 |27 | ||
| LEFT PARENTHESIS | (
|40 |28 | ||
| RIGHT PARENTHESIS | )
|41 |29 | ||
| PLUS SIGN | +
|43 |2B | ||
| COMMA | ,
|44 |2C | ||
| HYPHEN-MINUS | -
|45 |2D | ||
| FULL STOP | .
|46 |2E | ||
| SOLIDUS | /
|47 |2F | ||
| COLON | :
|58 |3A | ||
| EQUALS SIGN | =
|61 |3D | ||
| QUESTION MARK | ?
|63 |3F |
The PrintableString definition does not include the at sign (@) or ampersand (&).
This sometimes causes problems for naive implementers who attempt to put an SMTP email address into an X.509 digital certificate Distinguished Name.
The PrintableString definition does not include asterisk (*) which means it must not be used to represent a wildcard in an X.509 digital certificate Distinguished Name.