You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
83 lines
2.7 KiB
83 lines
2.7 KiB
=pod |
|
|
|
=head1 NAME |
|
|
|
ASN1_STRING_dup, ASN1_STRING_cmp, ASN1_STRING_set, ASN1_STRING_length, |
|
ASN1_STRING_length_set, ASN1_STRING_type, ASN1_STRING_data - |
|
ASN1_STRING utility functions |
|
|
|
=head1 SYNOPSIS |
|
|
|
#include <openssl/asn1.h> |
|
|
|
int ASN1_STRING_length(ASN1_STRING *x); |
|
unsigned char * ASN1_STRING_data(ASN1_STRING *x); |
|
|
|
ASN1_STRING * ASN1_STRING_dup(ASN1_STRING *a); |
|
|
|
int ASN1_STRING_cmp(ASN1_STRING *a, ASN1_STRING *b); |
|
|
|
int ASN1_STRING_set(ASN1_STRING *str, const void *data, int len); |
|
|
|
int ASN1_STRING_type(ASN1_STRING *x); |
|
|
|
int ASN1_STRING_to_UTF8(unsigned char **out, ASN1_STRING *in); |
|
|
|
=head1 DESCRIPTION |
|
|
|
These functions allow an B<ASN1_STRING> structure to be manipulated. |
|
|
|
ASN1_STRING_length() returns the length of the content of B<x>. |
|
|
|
ASN1_STRING_data() returns an internal pointer to the data of B<x>. |
|
Since this is an internal pointer it should B<not> be freed or |
|
modified in any way. |
|
|
|
ASN1_STRING_dup() returns a copy of the structure B<a>. |
|
|
|
ASN1_STRING_cmp() compares B<a> and B<b> returning 0 if the two |
|
are identical. The string types and content are compared. |
|
|
|
ASN1_STRING_set() sets the data of string B<str> to the buffer |
|
B<data> or length B<len>. The supplied data is copied. If B<len> |
|
is -1 then the length is determined by strlen(data). |
|
|
|
ASN1_STRING_type() returns the type of B<x>, using standard constants |
|
such as B<V_ASN1_OCTET_STRING>. |
|
|
|
ASN1_STRING_to_UTF8() converts the string B<in> to UTF8 format, the |
|
converted data is allocated in a buffer in B<*out>. The length of |
|
B<out> is returned or a negative error code. The buffer B<*out> |
|
should be free using OPENSSL_free(). |
|
|
|
=head1 NOTES |
|
|
|
Almost all ASN1 types in OpenSSL are represented as an B<ASN1_STRING> |
|
structure. Other types such as B<ASN1_OCTET_STRING> are simply typedefed |
|
to B<ASN1_STRING> and the functions call the B<ASN1_STRING> equivalents. |
|
B<ASN1_STRING> is also used for some B<CHOICE> types which consist |
|
entirely of primitive string types such as B<DirectoryString> and |
|
B<Time>. |
|
|
|
These functions should B<not> be used to examine or modify B<ASN1_INTEGER> |
|
or B<ASN1_ENUMERATED> types: the relevant B<INTEGER> or B<ENUMERATED> |
|
utility functions should be used instead. |
|
|
|
In general it cannot be assumed that the data returned by ASN1_STRING_data() |
|
is null terminated or does not contain embedded nulls. The actual format |
|
of the data will depend on the actual string type itself: for example |
|
for and IA5String the data will be ASCII, for a BMPString two bytes per |
|
character in big endian format, UTF8String will be in UTF8 format. |
|
|
|
Similar care should be take to ensure the data is in the correct format |
|
when calling ASN1_STRING_set(). |
|
|
|
=head1 RETURN VALUES |
|
|
|
=head1 SEE ALSO |
|
|
|
L<ERR_get_error(3)|ERR_get_error(3)> |
|
|
|
=head1 HISTORY |
|
|
|
=cut
|
|
|