ASN1_STRING_print_ex(3)

     NAME
          ASN1_STRING_print_ex, ASN1_STRING_print_ex_fp - ASN1_STRING
          output routines.

     SYNOPSIS
           #include <openssl/asn1.h>

           int ASN1_STRING_print_ex(BIO *out, ASN1_STRING *str, unsigned long flags);
           int ASN1_STRING_print_ex_fp(FILE *fp, ASN1_STRING *str, unsigned long flags);
           int ASN1_STRING_print(BIO *out, ASN1_STRING *str);


     DESCRIPTION
          These functions output an ASN1_STRING structure. ASN1_STRING
          is used to represent all the ASN1 string types.

          ASN1_STRING_print_ex() outputs str to out, the format is
          determined by the options flags. ASN1_STRING_print_ex_fp()
          is identical except it outputs to fp instead.

          ASN1_STRING_print() prints str to out but using a different
          format to ASN1_STRING_print_ex(). It replaces unprintable
          characters (other than CR, LF) with '.'.

     NOTES
          ASN1_STRING_print() is a legacy function which should be
          avoided in new applications.

          Although there are a large number of options frequently
          ASN1_STRFLAGS_RFC2253 is suitable, or on UTF8 terminals
          ASN1_STRFLAGS_RFC2253 & ~ASN1_STRFLAGS_ESC_MSB.

          The complete set of supported options for flags is listed
          below.

          Various characters can be escaped. If ASN1_STRFLGS_ESC_2253
          is set the characters determined by RFC2253 are escaped. If
          ASN1_STRFLGS_ESC_CTRL is set control characters are escaped.
          If ASN1_STRFLGS_ESC_MSB is set characters with the MSB set
          are escaped: this option should not be used if the terminal
          correctly interprets UTF8 sequences.

          Escaping takes several forms.

          If the character being escaped is a 16 bit character then
          the form "\WXXXX" is used using exactly four characters for
          the hex representation. If it is 32 bits then "\UXXXXXXXX"
          is used using eight characters of its hex representation.
          These forms will only be used if UTF8 conversion is not set
          (see below).

          Printable characters are normally escaped using the
          backslash ASN1_STRFLGS_ESC_QUOTE is set then the whole
          string is instead surrounded by double quote characters:
          this is arguably more readable than the backslash notation.
          Other characters use the "\XX" using exactly two characters
          of the hex representation.

          If ASN1_STRFLGS_UTF8_CONVERT is set then characters are
          converted to UTF8 format first. If the terminal supports the
          display of UTF8 sequences then this option will correctly
          display multi byte characters.

          If ASN1_STRFLGS_IGNORE_TYPE is set then the string type is
          not interpreted at all: everything is assumed to be one byte
          per character. This is primarily for debugging purposes and
          can result in confusing output in multi character strings.

          If ASN1_STRFLGS_SHOW_TYPE is set then the string type itself
          is printed out before its value (for example "BMPSTRING"),
          this actually uses ASN1_tag2str().

          The content of a string instead of being interpreted can be
          "dumped": this just outputs the value of the string using
          the form #XXXX using hex format for each octet.

          If ASN1_STRFLGS_DUMP_ALL is set then any type is dumped.

          Normally non character string types (such as OCTET STRING)
          are assumed to be one byte per character, if
          ASN1_STRFLAGS_DUMP_UNKNOWN is set then they will be dumped
          instead.

          When a type is dumped normally just the content octets are
          printed, if ASN1_STRFLGS_DUMP_DER is set then the complete
          encoding is dumped instead (including tag and length
          octets).

          ASN1_STRFLGS_RFC2253 includes all the flags required by
          RFC2253. It is equivalent to:
           ASN1_STRFLGS_ESC_2253 | ASN1_STRFLGS_ESC_CTRL |
          ASN1_STRFLGS_ESC_MSB |
           ASN1_STRFLGS_UTF8_CONVERT | ASN1_STRFLGS_DUMP_UNKNOWN
          ASN1_STRFLGS_DUMP_DER

     SEE ALSO
          X509_NAME_print_ex(3), ASN1_tag2str(3)

     HISTORY
          TBA