---
name: "X509_STORE_CTX_get_by_subject"
section: "3ssl"
platform: "linux"
package: "openssl"
version: "3.6.5-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/X509_STORE_CTX_get_by_subject"
---

# X509\_STORE\_CTX\_get\_by\_subject(3ssl)

X509 and X509\_CRL lookup functions

## NAME

X509\_STORE\_CTX\_get\_by\_subject, X509\_STORE\_CTX\_get\_obj\_by\_subject - X509 and X509\_CRL lookup functions

## SYNOPSIS

```
 #include <openssl/x509_vfy.h>
 int X509_STORE_CTX_get_by_subject(const X509_STORE_CTX *vs,
                                   X509_LOOKUP_TYPE type,
                                   const X509_NAME *name, X509_OBJECT *ret);
 X509_OBJECT *X509_STORE_CTX_get_obj_by_subject(X509_STORE_CTX *vs,
                                                X509_LOOKUP_TYPE type,
                                                const X509_NAME *name);
```

## DESCRIPTION

**X509\_STORE\_CTX\_get\_by\_subject()** tries to find an object of given *type*, which may be **X509\_LU\_X509** or **X509\_LU\_CRL**, and subject *name* from the store in the provided store context *vs*. If found and *ret* is not NULL, it increments the reference count and stores the looked up object in *ret*.

**X509\_STORE\_CTX\_get\_obj\_by\_subject()** is like **X509\_STORE\_CTX\_get\_by\_subject()** but returns the found object on success, else NULL.

## RETURN VALUES

**X509\_STORE\_CTX\_get\_by\_subject()** returns 1 if the lookup was successful, else 0.

**X509\_STORE\_CTX\_get\_obj\_by\_subject()** returns an object on success, else NULL.

## SEE ALSO

**X509\_LOOKUP\_meth\_set\_get\_by\_subject**(3), **X509\_LOOKUP\_by\_subject**(3)

## COPYRIGHT

Copyright 2022 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\>.