phpman > man > OSSL_PROVIDER-default(7)

OSSL_PROVIDER-DEFAULT(7SSL)                    OpenSSL                   OSSL_PROVIDER-DEFAULT(7SSL)



NAME
       OSSL_PROVIDER-default - OpenSSL default provider

DESCRIPTION
       The OpenSSL default provider supplies the majority of OpenSSL's diverse algorithm
       implementations. 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.

       If an attempt to load a provider has already been made (whether successful or not) then the
       default provider won't be loaded automatically. Therefore 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.

   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).

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

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

OPERATIONS AND ALGORITHMS
       The OpenSSL default provider supports these operations and algorithms:

   Hashing Algorithms / Message Digests
       SHA1, see EVP_MD-SHA1(7)
       SHA2, see EVP_MD-SHA2(7)
       SHA3, see EVP_MD-SHA3(7)
       KECCAK-KMAC, see EVP_MD-KECCAK-KMAC(7)
       SHAKE, see EVP_MD-SHAKE(7)
       BLAKE2, see EVP_MD-BLAKE2(7)
       SM3, see EVP_MD-SM3(7)
       MD5, see EVP_MD-MD5(7)
       MD5-SHA1, see EVP_MD-MD5-SHA1(7)

   Symmetric Ciphers
       AES, see EVP_CIPHER-AES(7)
       ARIA, see EVP_CIPHER-ARIA(7)
       CAMELLIA, see EVP_CIPHER-CAMELLIA(7)
       3DES, see EVP_CIPHER-DES(7)
       SEED, see EVP_CIPHER-SEED(7)
       SM4, see EVP_CIPHER-SM4(7)
       ChaCha20, see EVP_CIPHER-CHACHA(7)
       ChaCha20-Poly1305, see EVP_CIPHER-CHACHA(7)

   Message Authentication Code (MAC)
       BLAKE2, see EVP_MAC-BLAKE2(7)
       CMAC, see EVP_MAC-CMAC(7)
       GMAC, see EVP_MAC-GMAC(7)
       HMAC, see EVP_MAC-HMAC(7)
       KMAC, see EVP_MAC-KMAC(7)
       SIPHASH, see EVP_MAC-Siphash(7)
       POLY1305, see EVP_MAC-Poly1305(7)

   Key Derivation Function (KDF)
       HKDF, see EVP_KDF-HKDF(7)
       SSKDF, see EVP_KDF-SS(7)
       PBKDF2, see EVP_KDF-PBKDF2(7)
       PKCS12KDF, see EVP_KDF-PKCS12KDF(7)
       SSHKDF, see EVP_KDF-SSHKDF(7)
       TLS1-PRF, see EVP_KDF-TLS1_PRF(7)
       KBKDF, see EVP_KDF-KB(7)
       X942KDF-ASN1, see EVP_KDF-X942-ASN1(7)
       X942KDF-CONCAT, see EVP_KDF-X942-CONCAT(7)
       X963KDF, see EVP_KDF-X963(7)
       SCRYPT, see EVP_KDF-SCRYPT(7)
       KRB5KDF, see EVP_KDF-KRB5KDF(7)

   Key Exchange
       DH, see EVP_KEYEXCH-DH(7)
       ECDH, see EVP_KEYEXCH-ECDH(7)
       X25519, see EVP_KEYEXCH-X25519(7)
       X448, see EVP_KEYEXCH-X448(7)

   Asymmetric Signature
       DSA, see EVP_SIGNATURE-DSA(7)
       RSA, see EVP_SIGNATURE-RSA(7)
       HMAC, see EVP_SIGNATURE-HMAC(7)
       SIPHASH, see EVP_SIGNATURE-Siphash(7)
       POLY1305, see EVP_SIGNATURE-Poly1305(7)
       CMAC, see EVP_SIGNATURE-CMAC(7)

   Asymmetric Cipher
       RSA, see EVP_ASYM_CIPHER-RSA(7)
       SM2, see EVP_ASYM_CIPHER-SM2(7)

   Asymmetric Key Encapsulation
       RSA, see EVP_KEM-RSA(7)

   Asymmetric Key Management
       DH, see EVP_KEYMGMT-DH(7)
       DSA, see EVP_KEYMGMT-DSA(7)
       RSA, see EVP_KEYMGMT-RSA(7)
       EC, see EVP_KEYMGMT-EC(7)
       X25519, see EVP_KEYMGMT-X25519(7)
       X448, see EVP_KEYMGMT-X448(7)

   Asymmetric Key Encoder
       The default provider also includes all of the encoding algorithms present in the base
       provider.  Some of these have the property "fips=yes", to allow them to be used together with
       the FIPS provider.

       RSA, see OSSL_ENCODER-RSA(7)
       DH, see OSSL_ENCODER-DH(7)
       DSA, see OSSL_ENCODER-DSA(7)
       EC, see OSSL_ENCODER-EC(7)
       X25519, see OSSL_ENCODER-X25519(7)
       X448, see OSSL_ENCODER-X448(7)

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

COPYRIGHT
       Copyright 2020-2021 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>.



3.0.2                                        2026-06-02                  OSSL_PROVIDER-DEFAULT(7SSL)