X509_ACERT_G...ER_BASECERTID(3ossl)

okay bestie, welcome to the X509_ACERT_G...ER_BASECERTID(3ossl) page 🫶 this is the OpenSSL manual for getting and setting Attribute Certificate holder fields, and ngl it's giving very specific little accessor functions. Let's go 💅

🎀 NAME 🎀

these are the iconic little functions on this page — the get/set squad for Attribute Certificate holder fields:

• X509_ACERT_get0_holder_baseCertId
• X509_ACERT_get0_holder_digest
• X509_ACERT_get0_holder_entityName
• X509_ACERT_set0_holder_baseCertId
• X509_ACERT_set0_holder_digest
• X509_ACERT_set0_holder_entityName
• OSSL_ISSUER_SERIAL_get0_issuer
• OSSL_ISSUER_SERIAL_get0_issuerUID
• OSSL_ISSUER_SERIAL_get0_serial
• OSSL_ISSUER_SERIAL_set1_issuer
• OSSL_ISSUER_SERIAL_set1_issuerUID
• OSSL_ISSUER_SERIAL_set1_serial
• OSSL_OBJECT_DIGEST_INFO_get0_digest
• OSSL_OBJECT_DIGEST_INFO_set1_digest

...and yes, the whole vibe is get and set Attribute Certificate holder fields ✨

🌈 SYNOPSIS 🌈

        #include <openssl/x509_acert.h>

        const GENERAL_NAMES *X509_ACERT_get0_holder_entityName(const X509_ACERT *x);
        OSSL_ISSUER_SERIAL *X509_ACERT_get0_holder_baseCertId(const X509_ACERT *x);
        OSSL_OBJECT_DIGEST_INFO * X509_ACERT_get0_holder_digest(const X509_ACERT *x);
        void X509_ACERT_set0_holder_entityName(X509_ACERT *x, GENERAL_NAMES *name);
        void X509_ACERT_set0_holder_baseCertId(X509_ACERT *x, OSSL_ISSUER_SERIAL *isss);
        void X509_ACERT_set0_holder_digest(X509_ACERT *x,
                                           OSSL_OBJECT_DIGEST_INFO *dinfo);

        X509_NAME *OSSL_ISSUER_SERIAL_get0_issuer(OSSL_ISSUER_SERIAL *isss);
        ASN1_INTEGER *OSSL_ISSUER_SERIAL_get0_serial(OSSL_ISSUER_SERIAL *isss);
        ASN1_BIT_STRING *OSSL_ISSUER_SERIAL_get0_issuerUID(OSSL_ISSUER_SERIAL *isss);
        int OSSL_ISSUER_SERIAL_set1_issuer(OSSL_ISSUER_SERIAL *isss, X509_NAME *issuer);
        int OSSL_ISSUER_SERIAL_set1_serial(OSSL_ISSUER_SERIAL *isss, ASN1_INTEGER *serial);
        int OSSL_ISSUER_SERIAL_set1_issuerUID(OSSL_ISSUER_SERIAL *isss, ASN1_BIT_STRING *uid);

        void OSSL_OBJECT_DIGEST_INFO_get0_digest(OSSL_OBJECT_DIGEST_INFO *o,
                                                 ASN1_ENUMERATED **digestedObjectType,
                                                 X509_ALGOR **digestAlgorithm,
                                                 ASN1_BIT_STRING **digest);
        void OSSL_OBJECT_DIGEST_INFO_set1_digest(OSSL_OBJECT_DIGEST_INFO *o,
                                                 ASN1_ENUMERATED *digestedObjectType,
                                                 X509_ALGOR *digestAlgorithm,
                                                 ASN1_BIT_STRING *digest);

🦋 DESCRIPTION 🦋

These routines are the set-and-get besties for the holder identity of an X509 attribute certificate 💖

X509_ACERT_set0_holder_entityName() sets the identity as a GENERAL_NAME name. X509_ACERT_set0_holder_baseCertId() sets the identity based on the issuer and serial number of a certificate detailed in isss. X509_ACERT_set0_holder_digest() sets the holder entity based on digest information dinfo. Now, RFC 5755 section 4.2.2 recommends that only one of those methods be used to set the holder identity for a given attribute certificate x — but yes, setting multiple methods at the same time is possible 👀 It is up to the application to handle cases when conflicting identity information is specified using different methods.

Pointers to the internal structures describing the holder identity of attribute certificate x can be retrieved with X509_ACERT_get0_holder_entityName(), X509_ACERT_get0_holder_baseCertId(), and X509_ACERT_get0_holder_digest().

An OSSL_ISSUER_SERIAL object holds the subject name and UID of a certificate issuer and a certificate's serial number. OSSL_ISSUER_SERIAL_set1_issuer(), OSSL_ISSUER_SERIAL_set1_issuerUID(), and OSSL_ISSUER_SERIAL_set1_serial() respectively copy these values into the OSSL_ISSUER_SERIAL structure. The application is responsible for freeing its own copy of these values after use. OSSL_ISSUER_SERIAL_get0_issuer(), OSSL_ISSUER_SERIAL_get0_issuerUID(), and OSSL_ISSUER_SERIAL_get0_serial() return pointers to these values in the object.

An OSSL_OBJECT_DIGEST_INFO object holds a digest of data to identify the attribute certificate holder. OSSL_OBJECT_DIGEST_INFO_set1_digest() sets the digest information of the object. The type of digest information is given by digestedObjectType and can be one of:

• OSSL_OBJECT_DIGEST_INFO_PUBLIC_KEY — Hash of a public key
• OSSL_OBJECT_DIGEST_INFO_PUBLIC_KEY_CERT — Hash of a public key certificate
• OSSL_OBJECT_DIGEST_INFO_OTHER — Hash of another object. See NOTES below.

digestAlgorithm indicates the algorithm used to compute digest 🔥

💀 RETURN VALUES 💀

All set0/set1 routines return 1 for success and 0 for failure 🫶 All get0 functions return a pointer to the object's inner structure. These pointers must not be freed after use. 🚨

🌸 NOTES 🌸

Although the value of OSSL_OBJECT_DIGEST_INFO_OTHER is defined in RFC 5755, its use is prohibited for conformant attribute certificates 🙈 so like... it exists, but don't use it if you're being conformant, iykyk.

⭐ HISTORY ⭐

These functions were added in OpenSSL 3.4 ✨

🎀 COPYRIGHT 🎀

The legal bestie bit: Copyright 2023-2024 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 <https://www.openssl.org/source/license.html>.

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that's the whole vibe 💖 this page is from OpenSSL 3.5.6, and the footer's date/title chunk is 2026-04-0X509_ACERT_G...ER_BASECERTID(3ossl) — slay, go set some holder fields 🫶