# cryptodev-linux

**Repository Path**: tihchip/cryptodev-linux

## Basic Information

- **Project Name**: cryptodev-linux
- **Description**: No description available
- **Primary Language**: C
- **License**: GPL-2.0
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 2
- **Forks**: 2
- **Created**: 2024-01-05
- **Last Updated**: 2025-07-07

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# cryptodev-linux

This is a `/dev/crypto` device driver, equivalent to those in OpenBSD or
FreeBSD. The main idea is to access existing ciphers in kernel space
from userspace, thus enabling the re-use of a hardware implementation of a
cipher.

For questions and suggestions, please use the homepage at https://github.com.
Cryptodev-linux is hosted at https://github.com/cryptodev-linux/cryptodev-linux.

Older releases are also available at http://cryptodev-linux.org.

## How to combine with cryptographic libraries

### GnuTLS

GnuTLS needs to be compiled with `--enable-cryptodev` in order to take
advantage of `/dev/crypto`. GnuTLS 3.0.14 or later is recommended.

### OpenSSL

OpenSSL needs `-DHAVE_CRYPTODEV` and `-DUSE_CRYPTODEV_DIGESTS` flags
during compilation. Note that the latter flag (digests) may induce
a performance penalty in some systems.

## Modifying and viewing verbosity at runtime

The verbosity of the driver often needs to be adjusted for debugging.
The `sysctl` tool can be used for that.

```
# sysctl ioctl.cryptodev_verbosity
ioctl.cryptodev_verbosity = 0

# sysctl ioctl.cryptodev_verbosity=3
ioctl.cryptodev_verbosity = 3
```