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74 lines
2.4 KiB
Plaintext
74 lines
2.4 KiB
Plaintext
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=pod
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=head1 NAME
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X509_get0_distinguishing_id, X509_set0_distinguishing_id,
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X509_REQ_get0_distinguishing_id, X509_REQ_set0_distinguishing_id
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- get or set the Distinguishing ID for certificate operations
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=head1 SYNOPSIS
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#include <openssl/x509.h>
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ASN1_OCTET_STRING *X509_get0_distinguishing_id(X509 *x);
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void X509_set0_distinguishing_id(X509 *x, ASN1_OCTET_STRING *distid);
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ASN1_OCTET_STRING *X509_REQ_get0_distinguishing_id(X509_REQ *x);
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void X509_REQ_set0_distinguishing_id(X509_REQ *x, ASN1_OCTET_STRING *distid);
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=head1 DESCRIPTION
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The Distinguishing ID is defined in FIPS 196 as follows:
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=over 4
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=item I<Distinguishing identifier>
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Information which unambiguously distinguishes
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an entity in the authentication process.
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=back
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The SM2 signature algorithm requires a Distinguishing ID value when generating
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and verifying a signature, but the Ddistinguishing ID may also find other uses.
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In the context of SM2, the Distinguishing ID is often referred to as the "SM2
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ID".
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For the purpose off verifying a certificate or a certification request, a
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Distinguishing ID may be attached to it, so functions like L<X509_verify(3)>
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or L<X509_REQ_verify(3)> have easy access to that identity for signature
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verification.
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X509_get0_distinguishing_id() gets the Distinguishing ID value of a certificate
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B<x> by returning an B<ASN1_OCTET_STRING> object which should not be freed by
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the caller.
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X509_set0_distinguishing_id() assigns B<distid> to the certificate B<x>.
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Calling this function transfers the memory management of the value to the X509
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object, and therefore the value that has been passed in should not be freed by
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the caller after this function has been called.
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X509_REQ_get0_distinguishing_id() and X509_REQ_set0_distinguishing_id()
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have the same functionality as X509_get0_distinguishing_id() and
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X509_set0_distinguishing_id() except that they deal with B<X509_REQ>
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objects instead of B<X509>.
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=head1 RETURN VALUES
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X509_set0_distinguishing_id() and X509_REQ_set0_distinguishing_id() do not
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return a value.
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=head1 SEE ALSO
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L<X509_verify(3)>, L<SM2(7)>
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=head1 COPYRIGHT
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Copyright 2019-2020 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the Apache License 2.0 (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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