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

# EVP\_whirlpool(3ssl)

WHIRLPOOL For EVP

## NAME

EVP\_whirlpool - WHIRLPOOL For EVP

## SYNOPSIS

```
 #include <openssl/evp.h>
 const EVP_MD *EVP_whirlpool(void);
```

## DESCRIPTION

WHIRLPOOL is a cryptographic hash function standardized in ISO/IEC 10118-3:2004 designed by Vincent Rijmen and Paulo S. L. M. Barreto. This implementation is only available with the legacy provider.

- **EVP\_whirlpool()**

  The WHIRLPOOL algorithm that produces a message digest of 512-bits from a given input.

## NOTES

Developers should be aware of the negative performance implications of calling this function multiple times and should consider using **EVP\_MD\_fetch**(3) with **EVP\_MD-WHIRLPOOL**(7) instead. See "Performance" in [**crypto**(7)](/crypto/7.md) for further information.

## RETURN VALUES

These functions return a **EVP\_MD** structure that contains the implementation of the message digest. See **EVP\_MD\_meth\_new**(3) for details of the **EVP\_MD** structure.

## CONFORMING TO

ISO/IEC 10118-3:2004.

## SEE ALSO

**evp**(7), **provider**(7), **EVP\_DigestInit**(3)

## COPYRIGHT

Copyright 2017-2023 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\>.