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3 .\" Copyright (c) 2016 Ingo Schwarze <schwarze@openbsd.org>
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17 .Dd $Mdocdate: March 21 2018 $
29 .Nd Thawte strong extranet X.509 extension
35 .Fn SXNET_free "SXNET *sxnet"
39 .Fn SXNETID_free "SXNETID *sxnetid"
43 .Fa "const unsigned char **der_in"
49 .Fa "unsigned char **der_out"
53 .Fa "SXNETID **val_out"
54 .Fa "const unsigned char **der_in"
60 .Fa "unsigned char **der_out"
64 allocates and initializes an empty
66 object representing a non-standard proprietary Thawte strong extranet
73 allocates and initializes an empty
82 The remaining functions decode and encode these objects
84 For details about the semantics, examples, caveats, and bugs, see
108 return the number of bytes successfully encoded or a negative value
111 .Xr X509_EXTENSION_new 3 ,
115 .%R The Strong Extranet: real-world personal certification
116 .%Q Thawte Consulting
121 These functions first appeared in OpenSSL 0.9.3
122 and have been available since
125 This manual page does not explain what the extension actually does
126 because no authoritative information was found online so far.
128 The only hint was found in an ancient white paper "Securing IBM
129 Applications with Public Key Infrastructure" on the IBM website,
130 dated June 13, 2001: "Thawte also has a technology called Strong
131 Extranet that allows institutions to encode customer information
132 in the extensions to their customer's certificates.
133 Because multiple institutions can add information, the user needs
134 only one certificate, making renewal and revocation simpler, although
135 the issue of modifying an extension to an existing certificate is
138 It is unclear whether that explanation is accurate, but in any case,
139 it is not very specific.