OSSL_PROVIDER-DEFAULT(7ossl)

📦 version 3.5.0, in opensuse-leap 16.0

💅 OSSL_PROVIDER-DEFAULT 💅

ok so you're looking at the OSSL_PROVIDER-default page from the 7ossl manual, bestie — aka the OpenSSL default provider. she's the main character of algorithm implementations and honestly? she carries the whole squad. let's get into it 🫶

✨ NAME ✨

OSSL_PROVIDER-default — the OpenSSL default provider, no cap 💖

🌸 DESCRIPTION 🌸

okay so the OpenSSL default provider supplies the majority of OpenSSL's diverse algorithm implementations. like, she's the backbone, fr fr.

If an application doesn't specify anything else explicitly (e.g. in the application or via config), then this is the provider that will be used as fallback: it is loaded automatically the first time that an algorithm is fetched from a provider or a function acting on providers is called and no other provider has been loaded yet. it's giving "default queen behavior" 👑

⚠️ okay important caveat bestie, read this twice: If an attempt to load a provider has already been made (whether successful or not) then the default provider won't be loaded automatically. So if the default provider is to be used in conjunction with other providers then it must be loaded explicitly. Automatic loading of the default provider only occurs a maximum of once; if the default provider is explicitly unloaded then the default provider will not be automatically loaded again. 😭 like she said "you had your chance."

🎀 Properties 🎀

The implementations in this provider specifically have this property defined:

"provider=default"

It may be used in a property query string with fetching functions such as EVP_MD_fetch(3) or EVP_CIPHER_fetch(3), as well as with other functions that take a property query string, such as EVP_PKEY_CTX_new_from_name(3). iykyk 🔥

It isn't mandatory to query for this property, except to make sure to get implementations of this provider and none other. so like, optional but iconic.

Some implementations may define additional properties. Exact information is listed below ⬇️

🌈 OPERATIONS AND ALGORITHMS 🌈

The OpenSSL default provider supports these operations and algorithms — brace yourself, this list is LONG and she ate every single one 💅

🧚 Hashing Algorithms / Message Digests

🔐 Symmetric Ciphers

🦋 Message Authentication Code (MAC)

💜 Key Derivation Function (KDF)

⭐ Key Exchange

🔥 Asymmetric Signature

💀 Asymmetric Cipher

🍓 Asymmetric Key Encapsulation

👑 Asymmetric Key Management

🎲 Random Number Generation

In addition to this provider, the SEED-SRC and JITTER algorithms are also available in the base provider. sharing is caring 🫶

🌟 Asymmetric Key Encoder

  • RSA
  • RSA-PSS
  • DH
  • DHX
  • DSA
  • EC
  • ED25519
  • ED448
  • X25519
  • X448
  • SM2
  • ML-DSA-44
  • ML-DSA-65
  • ML-DSA-87
  • ML-KEM-512
  • ML-KEM-768
  • ML-KEM-1024
  • SLH-DSA-SHA2-128s
  • SLH-DSA-SHA2-128f
  • SLH-DSA-SHA2-192s
  • SLH-DSA-SHA2-192f
  • SLH-DSA-SHA2-256s
  • SLH-DSA-SHA2-256f
  • SLH-DSA-SHAKE-128s
  • SLH-DSA-SHAKE-128f
  • SLH-DSA-SHAKE-192s
  • SLH-DSA-SHAKE-192f
  • SLH-DSA-SHAKE-256s
  • SLH-DSA-SHAKE-256f

In addition to this provider, all of these encoding algorithms are also available in the base provider. Some of these algorithms may be used in combination with the FIPS provider. 💫

🧊 Asymmetric Key Decoder

  • RSA
  • RSA-PSS
  • DH
  • DHX
  • DSA
  • EC
  • ED25519
  • ED448
  • X25519
  • X448
  • SM2
  • ML-DSA-44
  • ML-DSA-65
  • ML-DSA-87
  • ML-KEM-512
  • ML-KEM-768
  • ML-KEM-1024
  • SLH-DSA-SHA2-128s
  • SLH-DSA-SHA2-128f
  • SLH-DSA-SHA2-192s
  • SLH-DSA-SHA2-192f
  • SLH-DSA-SHA2-256s
  • SLH-DSA-SHA2-256f
  • SLH-DSA-SHAKE-128s
  • SLH-DSA-SHAKE-128f
  • SLH-DSA-SHAKE-192s
  • SLH-DSA-SHAKE-192f
  • SLH-DSA-SHAKE-256s
  • SLH-DSA-SHAKE-256f

In addition to this provider, all of these decoding algorithms are also available in the base provider. Some of these algorithms may be used in combination with the FIPS provider. 💫

🎀 Stores

In addition to this provider, all of these store algorithms are also available in the base provider. 💖

👀 SEE ALSO 👀

openssl-core.h(7), openssl-core_dispatch.h(7), provider(7), OSSL_PROVIDER-base(7)

go read those too, bestie, they're literally the supporting cast 🫶

🕰️ HISTORY 🕰️

The RIPEMD160 digest was added to the default provider in OpenSSL 3.0.7. late arrival but she showed up 💅

All other functionality was added in OpenSSL 3.0. so like, day-one icon behavior.

Copyright 2020-2025 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>.

and that's the whole page, bestie 🎀 ok bye, this was version 3.5.0, dated 2026-09-25 — and it's the OSSL_PROVIDER-DEFAULT(7ossl) girlie herself, signing off 💜✨ no cap, she's iconic 🦋

📦 where this page comes from