X509V3_ADDR_INHERITS(3)

📦 version 4.4.0, in alpine 3.24, arch rolling

🦋 X509v3_addr_inherits & X509v3_asid_inherits — RFC 3779 inheritance 🦋

omg hi bestie 💖 welcome to the X509V3_ADDR_INHERITS(3) page — yes, that's the manual name, and we're about to vibe-check RFC 3779 inheritance together. no cap, it's giving niche crypto lore, but we got this.

🌸 NAME 🌸

X509v3_addr_inherits, X509v3_asid_inherits — RFC 3779 inheritance 💅

✨ SYNOPSIS ✨

okay so the synopsis is literally this, bestie — copied exactly:

library “libcrypto” #include <openssl/x509v3.h>

int
X509v3_addr_inherits(IPAddrBlocks *addrblocks);

int
X509v3_asid_inherits(ASIdentifiers *asids);

💖 DESCRIPTION 💖

  • X509v3_addr_inherits() — determines if there is at least one address family in addrblocks that uses inheritance. 👑
  • X509v3_asid_inherits() — is intended to determine if at least one of the list of autonomous system numbers or the list of routing domain identifiers uses inheritance. 🫶

🔥 RETURN VALUES 🔥

  • X509v3_addr_inherits() returns 1 if and only if addrblocks contains at least one IPAddressFamily object that is correctly marked “inherit”: its IPAddressChoice is of type IPAddressChoice_inherit and its inherit element is present. Otherwise it returns 0. 💅
  • X509v3_asid_inherits() returns 1 if and only if at least one of the asnum or the rdi lists has type ASIdentifierChoice_inherit. Otherwise it returns 0. ✨

🌈 SEE ALSO 🌈

👑 STANDARDS 👑

RFC 3779: X.509 Extensions for IP Addresses and AS Identifiers: 🧚

  • section 2: IP Address delegation extension
  • section 2.2.3.5: Element inherit
  • section 3: AS identifiers delegation extension
  • section 3.2.3.3: Element inherit

🎀 HISTORY 🎀

These functions first appeared in OpenSSL 0.9.8e and have been available since OpenBSD 7.1. iconic behavior, honestly 💜

💀 BUGS 💀

⚠️ bestie, listen: X509v3_asid_inherits() ignores whether the inherit element is present or absent in the list that is considered to use inheritance. 🙈

There is no API that determines whether all lists contained in an ASIdentifiers or an IPAddrBlocks object inherit. See RFC 9287, 5.1.2 for an example where this is relevant. 😭

mwah 💋 this page came from Debian, dated June 8, 2025, and it's the X509V3_ADDR_INHERITS(3) manual page. byeee 🫶

📦 where this page comes from