EVP_SIGNATURE-DSA - The EVP_PKEY DSA signature implementation
Support for computing DSA signatures. The signature produced with
EVP_PKEY_sign(3) is DER encoded ASN.1 in the form described in RFC
3279, section 2.2.2. See EVP_PKEY-DSA(7) for information related to
DSA keys.
As part of FIPS 140-3 DSA is not longer FIPS approved for key
generation and signature validation, but is still allowed for signature
verification.
In this list, names are grouped together to signify that they are
the same algorithm having multiple names. This also includes the OID in
canonical decimal form (which means that they are possible to fetch if the
caller has a mere OID which came out in this form after a call to
OBJ_obj2txt(3)).
- "DSA", "dsaEncryption",
"1.2.840.10040.4.1"
- The base signature algorithm, supported explicitly fetched with
EVP_PKEY_sign_init_ex2(3), and implicitly fetched (through EC keys)
with EVP_DigestSignInit(3) and EVP_DigestVerifyInit(3).
It can't be used with EVP_PKEY_sign_message_init(3)
- "DSA-SHA1", "DSA-SHA-1", "dsaWithSHA1",
"1.2.840.10040.4.3"
- "DSA-SHA2-224", "DSA-SHA224",
"dsa_with_SHA224", "2.16.840.1.101.3.4.3.1"
- "DSA-SHA2-256", "DSA-SHA256",
"dsa_with_SHA256", "2.16.840.1.101.3.4.3.2"
- "DSA-SHA2-384", "DSA-SHA384",
"dsa_with_SHA384", "id-dsa-with-sha384",
"1.2.840.1.101.3.4.3.3"
- "DSA-SHA2-512", "DSA-SHA512",
"dsa_with_SHA512", "id-dsa-with-sha512",
"1.2.840.1.101.3.4.3.4"
- "DSA-SHA3-224", "dsa_with_SHA3-224",
"id-dsa-with-sha3-224", "2.16.840.1.101.3.4.3.5"
- "DSA-SHA3-256", "dsa_with_SHA3-256",
"id-dsa-with-sha3-256", "2.16.840.1.101.3.4.3.6"
- "DSA-SHA3-384", "dsa_with_SHA3-384",
"id-dsa-with-sha3-384", "2.16.840.1.101.3.4.3.7"
- "DSA-SHA3-512", "dsa_with_SHA3-512",
"id-dsa-with-sha3-512", "2.16.840.1.101.3.4.3.8"
- DSA signature schemes with diverse message digest algorithms. They are all
supported explicitly fetched with EVP_PKEY_sign_init_ex2(3) and
EVP_PKEY_sign_message_init(3).
The following signature parameters can be set using
EVP_PKEY_CTX_set_params(). This may be called after
EVP_PKEY_sign_init() or EVP_PKEY_verify_init(), and before
calling EVP_PKEY_sign() or EVP_PKEY_verify(). They may also be
set using EVP_PKEY_sign_init_ex() or
EVP_PKEY_verify_init_ex().
- "digest" (OSSL_SIGNATURE_PARAM_DIGEST) <UTF8
string>
- "properties" (OSSL_SIGNATURE_PARAM_PROPERTIES) <UTF8
string>
- These two are not supported with the DSA signature schemes that already
include a message digest algorithm, See "Algorithm Names"
above.
- "nonce-type" (OSSL_SIGNATURE_PARAM_NONCE_TYPE)
<unsigned integer>
- "key-check" (OSSL_SIGNATURE_PARAM_FIPS_KEY_CHECK)
<integer>
- "digest-check" (OSSL_SIGNATURE_PARAM_FIPS_DIGEST_CHECK)
<integer>
- "sign-check" (OSSL_SIGNATURE_PARAM_FIPS_SIGN_CHECK)
<int>
- The settable parameters are described in
provider-signature(7).
The following signature parameters can be retrieved using
EVP_PKEY_CTX_get_params().
- "algorithm-id" (OSSL_SIGNATURE_PARAM_ALGORITHM_ID)
<octet string>
- "digest" (OSSL_SIGNATURE_PARAM_DIGEST) <UTF8
string>
- "nonce-type" (OSSL_SIGNATURE_PARAM_NONCE_TYPE)
<unsigned integer>
- "fips-indicator"
(OSSL_SIGNATURE_PARAM_FIPS_APPROVED_INDICATOR) <integer>
- The gettable parameters are described in
provider-signature(7).
EVP_PKEY_CTX_set_params(3), EVP_PKEY_sign(3),
EVP_PKEY_verify(3), provider-signature(7),
DSA Key generation and signature generation are no longer FIPS
approved in OpenSSL 3.4. See "FIPS indicators" in
fips_module(7) for more information.
Copyright 2020-2024 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>.