ASN1_PRINTABLE_TYPE(3)     Library Functions Manual     ASN1_PRINTABLE_TYPE(3)

NAME
     ASN1_PRINTABLE_type - classify a single-byte character string

SYNOPSIS
     #include <openssl/asn1.h>

     int
     ASN1_PRINTABLE_type(const unsigned char *string, int len);

DESCRIPTION
     ASN1_PRINTABLE_type() assumes that the given string consists of single-
     byte characters and classifies it according to which kinds characters
     occur.  If len is greater than 0, at most len characters are inspected.
     Otherwise, the string needs to be NUL-terminated.

RETURN VALUES
     If the given string contains a character outside the ascii(7) range,
     ASN1_PRINTABLE_type() returns V_ASN1_T61STRING.

     Otherwise, if it contains a character that is neither a letter nor a
     digit nor the space character (` ', ASCII 0x20) nor the apostrophe quote
     (`'', ASCII 0x27) nor contained in the set "()+,-./:=?", it returns
     V_ASN1_IA5STRING.

     Otherwise, including if string is a NULL pointer or points to an empty
     string, it returns V_ASN1_PRINTABLESTRING.

SEE ALSO
     ASN1_mbstring_copy(3), ASN1_STRING_new(3), ASN1_STRING_to_UTF8(3),
     isascii(3), ascii(7)

HISTORY
     ASN1_PRINTABLE_type() first appeared in SSLeay 0.4.5d, has been part of
     the public API since SSLeay 0.5.1, and has been available since
     OpenBSD 2.4.

CAVEATS
     The ASN.1 notion of what constitutes a PrintableString is more
     restrictive than what the C library function isprint(3) considers
     printable.

Linux 6.8.7-arch1-1            November 15, 2021           Linux 6.8.7-arch1-1