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Man Pages
OSSL(4) FreeBSD Kernel Interfaces Manual OSSL(4)

ossl —
driver using OpenSSL assembly routines

To compile this driver into the kernel, place the following lines in your kernel configuration file:
device crypto
device cryptodev
device ossl

Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

ossl_load="YES"

The OpenSSL distribution includes architecture-specific implementations for some commonly used cryptographic algorithms. This driver adds a wrapper around these routines permitting them to be used by in-kernel cryptography consumers such as kernel TLS and IPsec.

The ossl driver includes architecture-specific implementations for the following architectures:

  • arm64
  • amd64
  • i386

The ossl driver includes support for the following algorithms:

  • ChaCha20
  • ChaCha20-Poly1305 (RFC 8439)
  • Poly1305
  • SHA1
  • SHA1-HMAC
  • SHA2-224
  • SHA2-224-HMAC
  • SHA2-256
  • SHA2-256-HMAC
  • SHA2-384
  • SHA2-384-HMAC
  • SHA2-512
  • SHA2-512-HMAC

crypto(4), intro(4), ipsec(4), crypto(7), crypto(9)

The ossl driver first appeared in FreeBSD 13.0.
March 3, 2021 FreeBSD 13.1-RELEASE
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