gnutls_x509_crt_get_dn_by_oid(3)

1gnutls_x509_crt_get_dn_by_oid(3)    gnutls    gnutls_x509_crt_get_dn_by_oid(3)
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NAME

6       gnutls_x509_crt_get_dn_by_oid - API function
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SYNOPSIS

9       #include <gnutls/x509.h>
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11       int  gnutls_x509_crt_get_dn_by_oid(gnutls_x509_crt_t cert, const char *
12       oid, unsigned indx,  unsigned  int  raw_flag,  void  *  buf,  size_t  *
13       buf_size);
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ARGUMENTS

16       gnutls_x509_crt_t cert
17                   should contain a gnutls_x509_crt_t type
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19       const char * oid
20                   holds an Object Identified in null terminated string
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22       unsigned indx
23                   In case multiple same OIDs exist in the RDN, this specifies
24                   which to send. Use (0) to get the first one.
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26       unsigned int raw_flag
27                   If non-zero returns the raw DER data of the DN part.
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29       void * buf  a pointer where the DN part will be copied (may be null).
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31       size_t * buf_size
32                   initially holds the size of  buf
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DESCRIPTION

35       This function will extract the part of the name of the Certificate sub‐
36       ject  specified  by  the  given OID. The output, if the raw flag is not
37       used, will be encoded as described in RFC4514. Thus a  string  that  is
38       ASCII or UTF-8 encoded, depending on the certificate data.
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40       Some  helper  macros with popular OIDs can be found in gnutls/x509.h If
41       raw flag is (0), this function will only return  known  OIDs  as  text.
42       Other  OIDs will be DER encoded, as described in RFC4514 -- in hex for‐
43       mat  with  a  '#'  prefix.   You  can  check  about  known  OIDs  using
44       gnutls_x509_dn_oid_known().
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46       If   buf is null then only the size will be filled. If the  raw_flag is
47       not specified the output is always null terminated, although the
48        buf_size will not include the null character.
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RETURNS

51       GNUTLS_E_SHORT_MEMORY_BUFFER if the provided buffer is not long enough,
52       and  in that case the  buf_size will be updated with the required size.
53       GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE if there are no data in the  cur‐
54       rent index. On success 0 is returned.
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REPORTING BUGS

57       Report bugs to <bugs@gnutls.org>.
58       Home page: https://www.gnutls.org
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COPYRIGHT

62       Copyright © 2001-2020 Free Software Foundation, Inc., and others.
63       Copying  and  distribution  of this file, with or without modification,
64       are permitted in any medium  without  royalty  provided  the  copyright
65       notice and this notice are preserved.
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