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.\" ========================================================================
.\"
.IX Title "EVP_SIGNATURE-ECDSA 7ossl"
.TH EVP_SIGNATURE-ECDSA 7ossl "2024-10-22" "3.4.0" "OpenSSL"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
EVP_SIGNATURE\-ECDSA \- The EVP_PKEY ECDSA signature implementation.
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Support for computing \s-1ECDSA\s0 signatures.
See \s-1\fBEVP_PKEY\-EC\s0\fR\|(7) for information related to \s-1EC\s0 keys.
.SS "Algorithm Names"
.IX Subsection "Algorithm Names"
In this list, names are grouped together to signify that they are the same
algorithm having multiple names. This also includes the \s-1OID\s0 in canonical
decimal form (which means that they are possible to fetch if the caller has a
mere \s-1OID\s0 which came out in this form after a call to \fBOBJ_obj2txt\fR\|(3)).
.ie n .IP """\s-1ECDSA""\s0" 4
.el .IP "``\s-1ECDSA''\s0" 4
.IX Item "ECDSA"
The base signature algorithm, supported explicitly fetched with
\&\fBEVP_PKEY_sign_init_ex2\fR\|(3), and implicitly fetched (through
\&\s-1EC\s0 keys) with \fBEVP_DigestSignInit\fR\|(3) and
\&\fBEVP_DigestVerifyInit\fR\|(3).
.Sp
It can't be used with \fBEVP_PKEY_sign_message_init\fR\|(3)
.ie n .IP """\s-1ECDSA\-SHA1"", ""ECDSA\-SHA\-1"",\s0 ""ecdsa\-with\-SHA1"", ""1.2.840.10045.4.1""" 4
.el .IP "``\s-1ECDSA\-SHA1'', ``ECDSA\-SHA\-1'',\s0 ``ecdsa\-with\-SHA1'', ``1.2.840.10045.4.1''" 4
.IX Item "ECDSA-SHA1, ECDSA-SHA-1, ecdsa-with-SHA1, 1.2.840.10045.4.1"
.PD 0
.ie n .IP """\s-1ECDSA\-SHA2\-224"", ""ECDSA\-SHA224"",\s0 ""ecdsa\-with\-SHA224"", ""1.2.840.10045.4.3.1""" 4
.el .IP "``\s-1ECDSA\-SHA2\-224'', ``ECDSA\-SHA224'',\s0 ``ecdsa\-with\-SHA224'', ``1.2.840.10045.4.3.1''" 4
.IX Item "ECDSA-SHA2-224, ECDSA-SHA224, ecdsa-with-SHA224, 1.2.840.10045.4.3.1"
.ie n .IP """\s-1ECDSA\-SHA2\-256"", ""ECDSA\-SHA256"",\s0 ""ecdsa\-with\-SHA256"", ""1.2.840.10045.4.3.2""" 4
.el .IP "``\s-1ECDSA\-SHA2\-256'', ``ECDSA\-SHA256'',\s0 ``ecdsa\-with\-SHA256'', ``1.2.840.10045.4.3.2''" 4
.IX Item "ECDSA-SHA2-256, ECDSA-SHA256, ecdsa-with-SHA256, 1.2.840.10045.4.3.2"
.ie n .IP """\s-1ECDSA\-SHA2\-384"", ""ECDSA\-SHA384"",\s0 ""ecdsa\-with\-SHA384"", ""1.2.840.10045.4.3.3""" 4
.el .IP "``\s-1ECDSA\-SHA2\-384'', ``ECDSA\-SHA384'',\s0 ``ecdsa\-with\-SHA384'', ``1.2.840.10045.4.3.3''" 4
.IX Item "ECDSA-SHA2-384, ECDSA-SHA384, ecdsa-with-SHA384, 1.2.840.10045.4.3.3"
.ie n .IP """\s-1ECDSA\-SHA2\-512"", ""ECDSA\-SHA512"",\s0 ""ecdsa\-with\-SHA512"", ""1.2.840.10045.4.3.4""" 4
.el .IP "``\s-1ECDSA\-SHA2\-512'', ``ECDSA\-SHA512'',\s0 ``ecdsa\-with\-SHA512'', ``1.2.840.10045.4.3.4''" 4
.IX Item "ECDSA-SHA2-512, ECDSA-SHA512, ecdsa-with-SHA512, 1.2.840.10045.4.3.4"
.ie n .IP """\s-1ECDSA\-SHA3\-224"",\s0 ""ecdsa_with_SHA3\-224"", ""id\-ecdsa\-with\-sha3\-224"", ""2.16.840.1.101.3.4.3.9""" 4
.el .IP "``\s-1ECDSA\-SHA3\-224'',\s0 ``ecdsa_with_SHA3\-224'', ``id\-ecdsa\-with\-sha3\-224'', ``2.16.840.1.101.3.4.3.9''" 4
.IX Item "ECDSA-SHA3-224, ecdsa_with_SHA3-224, id-ecdsa-with-sha3-224, 2.16.840.1.101.3.4.3.9"
.ie n .IP """\s-1ECDSA\-SHA3\-256"",\s0 ""ecdsa_with_SHA3\-256"", ""id\-ecdsa\-with\-sha3\-256"", ""2.16.840.1.101.3.4.3.10""" 4
.el .IP "``\s-1ECDSA\-SHA3\-256'',\s0 ``ecdsa_with_SHA3\-256'', ``id\-ecdsa\-with\-sha3\-256'', ``2.16.840.1.101.3.4.3.10''" 4
.IX Item "ECDSA-SHA3-256, ecdsa_with_SHA3-256, id-ecdsa-with-sha3-256, 2.16.840.1.101.3.4.3.10"
.ie n .IP """\s-1ECDSA\-SHA3\-384"",\s0 ""ecdsa_with_SHA3\-384"", ""id\-ecdsa\-with\-sha3\-384"", ""2.16.840.1.101.3.4.3.11""" 4
.el .IP "``\s-1ECDSA\-SHA3\-384'',\s0 ``ecdsa_with_SHA3\-384'', ``id\-ecdsa\-with\-sha3\-384'', ``2.16.840.1.101.3.4.3.11''" 4
.IX Item "ECDSA-SHA3-384, ecdsa_with_SHA3-384, id-ecdsa-with-sha3-384, 2.16.840.1.101.3.4.3.11"
.ie n .IP """\s-1ECDSA\-SHA3\-512"",\s0 ""ecdsa_with_SHA3\-512"", ""id\-ecdsa\-with\-sha3\-512"", ""2.16.840.1.101.3.4.3.12""" 4
.el .IP "``\s-1ECDSA\-SHA3\-512'',\s0 ``ecdsa_with_SHA3\-512'', ``id\-ecdsa\-with\-sha3\-512'', ``2.16.840.1.101.3.4.3.12''" 4
.IX Item "ECDSA-SHA3-512, ecdsa_with_SHA3-512, id-ecdsa-with-sha3-512, 2.16.840.1.101.3.4.3.12"
.PD
\&\s-1ECDSA\s0 signature schemes with diverse message digest algorithms. They are all
supported explicitly fetched with \fBEVP_PKEY_sign_init_ex2\fR\|(3) and
\&\fBEVP_PKEY_sign_message_init\fR\|(3).
.SS "\s-1ECDSA\s0 Signature Parameters"
.IX Subsection "ECDSA Signature Parameters"
The following signature parameters can be set using \fBEVP_PKEY_CTX_set_params()\fR.
This may be called after \fBEVP_PKEY_sign_init()\fR or \fBEVP_PKEY_verify_init()\fR,
and before calling \fBEVP_PKEY_sign()\fR or \fBEVP_PKEY_verify()\fR.
.ie n .IP """digest"" (\fB\s-1OSSL_SIGNATURE_PARAM_DIGEST\s0\fR) <\s-1UTF8\s0 string>" 4
.el .IP "``digest'' (\fB\s-1OSSL_SIGNATURE_PARAM_DIGEST\s0\fR) <\s-1UTF8\s0 string>" 4
.IX Item "digest (OSSL_SIGNATURE_PARAM_DIGEST) <UTF8 string>"
.PD 0
.ie n .IP """properties"" (\fB\s-1OSSL_SIGNATURE_PARAM_PROPERTIES\s0\fR) <\s-1UTF8\s0 string>" 4
.el .IP "``properties'' (\fB\s-1OSSL_SIGNATURE_PARAM_PROPERTIES\s0\fR) <\s-1UTF8\s0 string>" 4
.IX Item "properties (OSSL_SIGNATURE_PARAM_PROPERTIES) <UTF8 string>"
.PD
These two are not supported with the \s-1ECDSA\s0 signature schemes that already
include a message digest algorithm, See \*(L"Algorithm Names\*(R" above.
.ie n .IP """nonce-type"" (\fB\s-1OSSL_SIGNATURE_PARAM_NONCE_TYPE\s0\fR) <unsigned integer>" 4
.el .IP "``nonce-type'' (\fB\s-1OSSL_SIGNATURE_PARAM_NONCE_TYPE\s0\fR) <unsigned integer>" 4
.IX Item "nonce-type (OSSL_SIGNATURE_PARAM_NONCE_TYPE) <unsigned integer>"
.PD 0
.ie n .IP """key-check"" (\fB\s-1OSSL_SIGNATURE_PARAM_FIPS_KEY_CHECK\s0\fR) <integer>" 4
.el .IP "``key-check'' (\fB\s-1OSSL_SIGNATURE_PARAM_FIPS_KEY_CHECK\s0\fR) <integer>" 4
.IX Item "key-check (OSSL_SIGNATURE_PARAM_FIPS_KEY_CHECK) <integer>"
.ie n .IP """digest-check"" (\fB\s-1OSSL_SIGNATURE_PARAM_FIPS_DIGEST_CHECK\s0\fR) <integer>" 4
.el .IP "``digest-check'' (\fB\s-1OSSL_SIGNATURE_PARAM_FIPS_DIGEST_CHECK\s0\fR) <integer>" 4
.IX Item "digest-check (OSSL_SIGNATURE_PARAM_FIPS_DIGEST_CHECK) <integer>"
.PD
These parameters are described in \fBprovider\-signature\fR\|(7).
.PP
The following signature parameters can be retrieved using
\&\fBEVP_PKEY_CTX_get_params()\fR.
.ie n .IP """algorithm-id"" (\fB\s-1OSSL_SIGNATURE_PARAM_ALGORITHM_ID\s0\fR) <octet string>" 4
.el .IP "``algorithm-id'' (\fB\s-1OSSL_SIGNATURE_PARAM_ALGORITHM_ID\s0\fR) <octet string>" 4
.IX Item "algorithm-id (OSSL_SIGNATURE_PARAM_ALGORITHM_ID) <octet string>"
.PD 0
.ie n .IP """digest"" (\fB\s-1OSSL_SIGNATURE_PARAM_DIGEST\s0\fR) <\s-1UTF8\s0 string>" 4
.el .IP "``digest'' (\fB\s-1OSSL_SIGNATURE_PARAM_DIGEST\s0\fR) <\s-1UTF8\s0 string>" 4
.IX Item "digest (OSSL_SIGNATURE_PARAM_DIGEST) <UTF8 string>"
.ie n .IP """nonce-type"" (\fB\s-1OSSL_SIGNATURE_PARAM_NONCE_TYPE\s0\fR) <unsigned integer>" 4
.el .IP "``nonce-type'' (\fB\s-1OSSL_SIGNATURE_PARAM_NONCE_TYPE\s0\fR) <unsigned integer>" 4
.IX Item "nonce-type (OSSL_SIGNATURE_PARAM_NONCE_TYPE) <unsigned integer>"
.ie n .IP """fips-indicator"" (\fB\s-1OSSL_SIGNATURE_PARAM_FIPS_APPROVED_INDICATOR\s0\fR) <integer>" 4
.el .IP "``fips-indicator'' (\fB\s-1OSSL_SIGNATURE_PARAM_FIPS_APPROVED_INDICATOR\s0\fR) <integer>" 4
.IX Item "fips-indicator (OSSL_SIGNATURE_PARAM_FIPS_APPROVED_INDICATOR) <integer>"
.ie n .IP """verify-message"" (\fB\s-1OSSL_SIGNATURE_PARAM_FIPS_VERIFY_MESSAGE\s0\fR <integer>" 4
.el .IP "``verify-message'' (\fB\s-1OSSL_SIGNATURE_PARAM_FIPS_VERIFY_MESSAGE\s0\fR <integer>" 4
.IX Item "verify-message (OSSL_SIGNATURE_PARAM_FIPS_VERIFY_MESSAGE <integer>"
.PD
The parameters are described in \fBprovider\-signature\fR\|(7).
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBEVP_PKEY_CTX_set_params\fR\|(3),
\&\fBEVP_PKEY_sign\fR\|(3),
\&\fBEVP_PKEY_verify\fR\|(3),
\&\fBprovider\-signature\fR\|(7),
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2020\-2024 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the Apache License 2.0 (the \*(L"License\*(R"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.
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