X509_ACERT_PRINT_EX(3ossl)

✨ X509_ACERT_print_ex / X509_ACERT_print: attribute-cert printing, but make it cute ✨

Okay bestie, this is the X509_ACERT_PRINT_EX(3ossl) manual page — yes, the whole vibe is “print an attribute certificate and make it readable,” and honestly? iconic. 💅

🌸 NAME 🌸

X509_ACERT_print_ex, X509_ACERT_print — X509_ACERT printing routines.

🎀 SYNOPSIS 🎀

#include <openssl/x509_acert.h>

int X509_ACERT_print(BIO *bp, X509_ACERT *acert);
int X509_ACERT_print_ex(BIO *bp, X509_ACERT *acert, unsigned long nmflags,
                        unsigned long cflag);

💖 DESCRIPTION 💖

Okay so X509_ACERT_print_ex() prints a human readable version of the attribute certificate acert to BIO bp. Cute, right? Here’s the data inside the attribute certificate that gets printed, in order:

• The header text "Attribute certificate:" and "Data:" (X509_FLAG_NO_HEADER).
• The attribute certificate version number as defined by the standard, followed in parentheses by the value contained in the version field in hexadecimal notation. If the version number is not a valid value according to the specification, only the raw value is printed. See X509_ACERT_get_version(3) for details. (X509_FLAG_NO_VERSION)
• The serial number of the attribute certificate (X509_FLAG_NO_SERIAL).
• The identity of the holder of the attribute certificate. If the holder issuer name is present, the first GENERAL_NAME returned by X509_ACERT_get0_holder_entityName() is printed. If the holder baseCertificateId is present, the issuer name (printed with X509_NAME_print_ex) and serial number of the holder’s certificate are displayed. (X509_FLAG_NO_SUBJECT)
• The name of the attribute certificate issuer as returned from X509_ACERT_get0_issuerName() and printed using X509_NAME_print_ex(). (X509_FLAG_NO_ISSUER)
• The period of validity between the times returned from X509_ACERT_get0_notBefore() and X509_ACERT_get0_notAfter(). The values are printed as generalized times using ASN1_GENERALIZEDTIME_print(). (X509_FLAG_NO_VALIDITY)
• The list of attributes contained in the attribute certificate. The attribute type is printed with i2a_ASN1_OBJECT(). String valued attributes are printed as raw string data. ASN1 encoded values are printed with ASN1_parse_dump(). (X509_FLAG_NO_ATTRIBUTES)
• All X.509 extensions contained in the attribute certificate. (X509_FLAG_NO_EXTENSIONS)
• The signature is printed with X509_signature_print(). (X509_FLAG_NO_SIGDUMP)

If cflag is specified as X509_FLAG_COMPAT, all of the above data in the attribute certificate will be printed. Slay. ✨

The nmflags flag determines the format used to output all fields printed using X509_NAME_print_ex(). See X509_NAME_print_ex(3) for details.

X509_ACERT_print() is equivalent to calling X509_ACERT_print_ex() with the nmflags and cflags set to XN_FLAG_COMPAT and X509_FLAG_COMPAT respectively. No cap. 💅

🦋 RETURN VALUES 🦋

X509_ACERT_print_ex() and X509_ACERT_print() return 1 for success and 0 for failure. That’s it, bestie. Periodt. 🫶

🌈 SEE ALSO 🌈

• X509_NAME_print_ex(3)

🧚 HISTORY 🧚

X509_ACERT_print() and X509_ACERT_print_ex() were added in OpenSSL 3.4. Iconic behavior. 👑

👑 COPYRIGHT 👑

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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Source/version: OpenSSL 3.5.6 · dated 2026-04-07 — okay bye bestie, go print those attribute certs 💅💖