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,[1] the character set of PrintableString can be expressed as:
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.
^Information technology – Abstract Syntax Notation One (ASN.1): Specification of basic notation, ITU-T X.680, 07/2002
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