---
name: "libressl-SSL_dup_CA_list"
section: "3"
platform: "linux"
package: "libressl"
version: "4.4.0-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/libressl-SSL_dup_CA_list"
---

# libressl-SSL\_dup\_CA\_list(3)

deep copy of a stack of X.509 Name objects

## NAME

**SSL\_dup\_CA\_list** – deep copy of a stack of X.509 Name objects

## SYNOPSIS

SSL Library (libssl, -lssl) libcrypto

**#include \<openssl/ssl.h\>**

*STACK\_OF(X509\_NAME)* *\**\

**SSL\_dup\_CA\_list**(*const STACK\_OF(X509\_NAME) \*sk*);

## DESCRIPTION

**SSL\_dup\_CA\_list**() constructs a new *STACK\_OF(X509\_NAME)* object and places copies of all the *X509\_NAME* objects found on *sk* on it.

## RETURN VALUES

**SSL\_dup\_CA\_list**() returns the new *STACK\_OF(X509\_NAME)* or NULL on failure.

## SEE ALSO

[ssl(3)](/ssl/3.md), SSL\_CTX\_set\_client\_CA\_list(3), SSL\_get\_client\_CA\_list(3), SSL\_load\_client\_CA\_file(3), X509\_NAME\_new(3)

## HISTORY

**SSL\_dup\_CA\_list**() first appeared in SSLeay 0.8.0 and has been available since OpenBSD 2.4.