=pod =head1 NAME ASN1_STRING_dup, ASN1_STRING_cmp, ASN1_STRING_set, ASN1_STRING_length, ASN1_STRING_type, ASN1_STRING_get0_data, ASN1_STRING_data, ASN1_STRING_to_UTF8 - ASN1_STRING utility functions =head1 SYNOPSIS #include int ASN1_STRING_length(ASN1_STRING *x); const unsigned char * ASN1_STRING_get0_data(const ASN1_STRING *x); unsigned char * ASN1_STRING_data(ASN1_STRING *x); ASN1_STRING * ASN1_STRING_dup(const 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(const ASN1_STRING *x); int ASN1_STRING_to_UTF8(unsigned char **out, const ASN1_STRING *in); =head1 DESCRIPTION These functions allow an B structure to be manipulated. ASN1_STRING_length() returns the length of the content of B. ASN1_STRING_get0_data() returns an internal pointer to the data of B. Since this is an internal pointer it should B be freed or modified in any way. ASN1_STRING_data() is similar to ASN1_STRING_get0_data() except the returned value is not constant. This function is deprecated: applications should use ASN1_STRING_get0_data() instead. ASN1_STRING_dup() returns a copy of the structure B. ASN1_STRING_cmp() compares B and B returning 0 if the two are identical. The string types and content are compared. ASN1_STRING_set() sets the data of string B to the buffer B or length B. The supplied data is copied. If B is -1 then the length is determined by strlen(data). ASN1_STRING_type() returns the type of B, using standard constants such as B. ASN1_STRING_to_UTF8() converts the string B to UTF8 format, the converted data is allocated in a buffer in B<*out>. The length of B is returned or a negative error code. The buffer B<*out> should be freed using OPENSSL_free(). =head1 NOTES Almost all ASN1 types in OpenSSL are represented as an B structure. Other types such as B are simply typedef'ed to B and the functions call the B equivalents. B is also used for some B types which consist entirely of primitive string types such as B and B is greater than, equal to, or less than B. ASN1_STRING_set() returns 1 on success or 0 on error. ASN1_STRING_type() returns the type of B. ASN1_STRING_to_UTF8() returns the number of bytes in output string B or a negative value if an error occurred. =head1 SEE ALSO L =head1 COPYRIGHT Copyright 2002-2018 The OpenSSL Project Authors. All Rights Reserved. Licensed under the Apache License 2.0 (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at L. =cut