OSSL_PROVIDER-default - OpenSSL default provider

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>. 3.5.0 2025-06-04 OSSL_PROVIDER-DEFAULT(7SSL)

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 on systems that are not operating in FIPS-approved mode: 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

The RIPEMD160 digest was added to the default provider in OpenSSL 3.0.7. All other functionality was added in OpenSSL 3.0.

OSSL_PROVIDER-default - OpenSSL default provider

The OpenSSL default provider supports these operations and algorithms: HashingAlgorithms/MessageDigests SHA1, see EVP_MD-SHA1(7) SHA2, see EVP_MD-SHA2(7) SHA3, see EVP_MD-SHA3(7) KECCAK, see EVP_MD-KECCAK(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) RIPEMD160, see EVP_MD-RIPEMD160(7) NULL, see EVP_MD-NULL(7) SymmetricCiphers AES, see EVP_CIPHER-AES(7) ARIA, see EVP_CIPHER-ARIA(7) CAMELLIA, see EVP_CIPHER-CAMELLIA(7) 3DES, see EVP_CIPHER-DES(7) SM4, see EVP_CIPHER-SM4(7) ChaCha20, see EVP_CIPHER-CHACHA(7) ChaCha20-Poly1305, see EVP_CIPHER-CHACHA(7) NULL, see EVP_CIPHER-NULL(7) MessageAuthenticationCode(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) KeyDerivationFunction(KDF) HKDF, see EVP_KDF-HKDF(7) TLS13-KDF, see EVP_KDF-TLS13_KDF(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) HMAC-DRBG, see EVP_KDF-HMAC-DRBG(7) ARGON2, see EVP_KDF-ARGON2(7) KeyExchange DH, see EVP_KEYEXCH-DH(7) ECDH, see EVP_KEYEXCH-ECDH(7) X25519, see EVP_KEYEXCH-X25519(7) X448, see EVP_KEYEXCH-X448(7) ML-KEM-512, see EVP_KEM-ML-KEM-512(7) ML-KEM-768, see EVP_KEM-ML-KEM-768(7) ML-KEM-1024, see EVP_KEM-ML-KEM-1024(7) TLS1-PRF HKDF SCRYPT AsymmetricSignature DSA, see EVP_SIGNATURE-DSA(7) RSA, see EVP_SIGNATURE-RSA(7) ED25519, see EVP_SIGNATURE-ED25519(7) ED448, see EVP_SIGNATURE-ED448(7) ECDSA, see EVP_SIGNATURE-ECDSA(7) SM2 ML-DSA-44, see EVP_SIGNATURE-ML-DSA(7) ML-DSA-65, see EVP_SIGNATURE-ML-DSA(7) ML-DSA-87, see EVP_SIGNATURE-ML-DSA(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) SLH-DSA-SHA2-128s, see EVP_SIGNATURE-SLH-DSA(7) SLH-DSA-SHA2-128f, see EVP_SIGNATURE-SLH-DSA(7) SLH-DSA-SHA2-192s, see EVP_SIGNATURE-SLH-DSA(7) SLH-DSA-SHA2-192f, see EVP_SIGNATURE-SLH-DSA(7) SLH-DSA-SHA2-256s, see EVP_SIGNATURE-SLH-DSA(7) SLH-DSA-SHA2-256f, see EVP_SIGNATURE-SLH-DSA(7) SLH-DSA-SHAKE-128s, see EVP_SIGNATURE-SLH-DSA(7) SLH-DSA-SHAKE-128f, see EVP_SIGNATURE-SLH-DSA(7) SLH-DSA-SHAKE-192s, see EVP_SIGNATURE-SLH-DSA(7) SLH-DSA-SHAKE-192f, see EVP_SIGNATURE-SLH-DSA(7) SLH-DSA-SHAKE-256s, see EVP_SIGNATURE-SLH-DSA(7) SLH-DSA-SHAKE-256f, see EVP_SIGNATURE-SLH-DSA(7) AsymmetricCipher RSA, see EVP_ASYM_CIPHER-RSA(7) SM2, see EVP_ASYM_CIPHER-SM2(7) AsymmetricKeyEncapsulation RSA, see EVP_KEM-RSA(7) X25519, see EVP_KEM-X25519(7) X448, see EVP_KEM-X448(7) EC, see EVP_KEM-EC(7) ML-KEM-512, see EVP_KEM-ML-KEM-512(7) ML-KEM-768, see EVP_KEM-ML-KEM-768(7) ML-KEM-1024, see EVP_KEM-ML-KEM-1024(7) AsymmetricKeyManagement DSA, see EVP_KEYMGMT-DSA(7) RSA, see EVP_KEYMGMT-RSA(7) RSA-PSS EC, see EVP_KEYMGMT-EC(7) ED25519, see EVP_KEYMGMT-ED25519(7) ED448, see EVP_KEYMGMT-ED448(7) SM2, see EVP_KEYMGMT-SM2(7) DH, see EVP_KEYMGMT-DH(7) DHX, see EVP_KEYMGMT-DHX(7) X25519, see EVP_KEYMGMT-X25519(7) X448, see EVP_KEYMGMT-X448(7) ML-DSA-44, see EVP_KEYMGMT-ML-DSA(7) ML-DSA-65, see EVP_KEYMGMT-ML-DSA(7) ML-DSA-87, see EVP_KEYMGMT-ML-DSA(7) MK-KEM-512, see EVP_KEYMGMT-ML-KEM-512(7) MK-KEM-768, see EVP_KEYMGMT-ML-KEM-768(7) MK-KEM-1024, see EVP_KEYMGMT-ML-KEM-1024(7) SLH-DSA-SHA2-128s, see EVP_KEYMGMT-SLH-DSA(7) SLH-DSA-SHA2-128f, see EVP_KEYMGMT-SLH-DSA(7) SLH-DSA-SHA2-192s, see EVP_KEYMGMT-SLH-DSA(7) SLH-DSA-SHA2-192f, see EVP_KEYMGMT-SLH-DSA(7) SLH-DSA-SHA2-256s, see EVP_KEYMGMT-SLH-DSA(7) SLH-DSA-SHA2-256f, see EVP_KEYMGMT-SLH-DSA(7) SLH-DSA-SHAKE-128s, see EVP_KEYMGMT-SLH-DSA(7) SLH-DSA-SHAKE-128f, see EVP_KEYMGMT-SLH-DSA(7) SLH-DSA-SHAKE-192s, see EVP_KEYMGMT-SLH-DSA(7) SLH-DSA-SHAKE-192f, see EVP_KEYMGMT-SLH-DSA(7) SLH-DSA-SHAKE-256s, see EVP_KEYMGMT-SLH-DSA(7) SLH-DSA-SHAKE-256f, see EVP_KEYMGMT-SLH-DSA(7) TLS1-PRF HKDF SCRYPT HMAC, see EVP_KEYMGMT-HMAC(7) SIPHASH, see EVP_KEYMGMT-Siphash(7) POLY1305, see EVP_KEYMGMT-Poly1305(7) CMAC, see EVP_KEYMGMT-CMAC(7) RandomNumberGeneration CTR-DRBG, see EVP_RAND-CTR-DRBG(7) HASH-DRBG, see EVP_RAND-HASH-DRBG(7) HMAC-DRBG, see EVP_RAND-HMAC-DRBG(7) SEED-SRC, see EVP_RAND-SEED-SRC(7) JITTER, see EVP_RAND-JITTER(7) TEST-RAND, see EVP_RAND-TEST-RAND(7) In addition to this provider, the "SEED-SRC" and "JITTER" algorithms are also available in the base provider. AsymmetricKeyEncoder 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. AsymmetricKeyDecoder 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 file org.openssl.winstore, see OSSL_STORE-winstore(7) In addition to this provider, all of these store algorithms are also available in the base provider.

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