X509_ACERT_G...ER_BASECERTID(3ossl)

📦 version 3.5.0, in opensuse-leap 16.0

🌸 X509_ACERT_G...ER_BASECERTID — the OpenSSL 3ossl manual, bestie edition 🌸

okay so this is the 3ossl manpage for X509_ACERT_get0_holder_baseCertId and its whole friend group 💅 like, it's the OpenSSL docs but make it make sense.

✨ NAME ✨

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 — get and set Attribute Certificate holder fields 🎀

that's the whole squad. every single one. no cap.

🦋 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 💖

so these routines set and get the holder identity of an X509 attribute certificate. it's giving "who even IS this acert for" energy, and honestly? iconic.

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. and X509_ACERT_set0_holder_digest() sets the holder entity based on digest information dinfo. three different lil methods, same goal 🫶

ngl, RFC 5755 section 4.2.2 recommends that only one of the above methods be used to set the holder identity for a given attribute certificate x. but bestie… setting multiple methods at the same time is literally possible. so yeah, it's up to the application to handle cases when conflicting identity information is specified using different methods. that's on you, not on OpenSSL 💀

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(). get0, get outta here ✨

an OSSL_ISSUER_SERIAL object holds the subject name and UID of a certificate issuer and a certificate's serial number. okay so:

  • 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. and bestie, the application is responsible for freeing its own copy of these values after use. don't forget. i'm serious. 🫶
  • OSSL_ISSUER_SERIAL_get0_issuer(), OSSL_ISSUER_SERIAL_get0_issuerUID(), and OSSL_ISSUER_SERIAL_get0_serial() return pointers to these values in the object. no copies, just pointers. lowkey efficient 💅

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 it 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. like, which math did the hashing, bestie 🧮

🔥 RETURN VALUES 🔥

  • All set0/set1 routines return 1 for success and 0 for failure. periodt.
  • All get0 functions return a pointer to the object's inner structure. ✨
major warning: these pointers must not be freed after use. do not free them. not even a little. not even ironically. 😭

💜 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 it's not invited to the party 🙈

🌈 HISTORY 🌈

these functions were added in OpenSSL 3.4. so they're new-ish. fresh off the shelf 🍓

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>.

aaaand that's the page, bestie 🧚💖 sign-off time: this was the OpenSSL 3.5.0 manual, dated 2026-09-2X, and yes the footer says X509_ACERT_G...ER_BASECERTID(3ossl) all over again because manpages are dramatic like that 💅✨

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