https://docs.openssl.org/3.2/man3/PKCS8_pkey_add1_attr/
PKCS8_pkey_add1_attr - OpenSSL Documentation
openssl documentationpkcs8add1attr
https://docs.rs/pkcs8/latest/pkcs8/
pkcs8 - Rust
RustCrypto: PKCS#8 (Private Keys)
pkcs8rust
https://man.netbsd.org/NetBSD-11.x-BRANCH/openssl-pkcs8.1
openssl-pkcs8(1) - NetBSD Manual Pages
manual pagesopensslpkcs8netbsd