# phpman > man > EVP_SIGNATURE-ECDSA(7ssl)

[EVP_SIGNATURE-ECDSA(7SSL)](https://www.chedong.com/phpMan.php/man/EVPSIGNATURE-ECDSA/7SSL/markdown)                      OpenSSL                     [EVP_SIGNATURE-ECDSA(7SSL)](https://www.chedong.com/phpMan.php/man/EVPSIGNATURE-ECDSA/7SSL/markdown)



## NAME
       EVP_SIGNATURE-ECDSA - The EVP_PKEY ECDSA signature implementation.

## DESCRIPTION
       Support for computing ECDSA signatures.  See **EVP**___**[PKEY-EC**(7)](https://www.chedong.com/phpMan.php/man/PKEY-EC/7/markdown) for information related to EC
       keys.

### ECDSA Signature Parameters
       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()**.

       "digest" (**OSSL**___**SIGNATURE**___**PARAM**___**DIGEST**) <UTF8 string>
       "properties" (**OSSL**___**SIGNATURE**___**PARAM**___**PROPERTIES**) <UTF8 string>
           These parameters are described in [**provider-signature**(7)](https://www.chedong.com/phpMan.php/man/provider-signature/7/markdown).

       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>
           The parameters are described in [**provider-signature**(7)](https://www.chedong.com/phpMan.php/man/provider-signature/7/markdown).

## SEE ALSO
       **EVP**___**PKEY**___**CTX**___**set**___**[params**(3)](https://www.chedong.com/phpMan.php/man/params/3/markdown), **EVP**___**PKEY**___**[sign**(3)](https://www.chedong.com/phpMan.php/man/sign/3/markdown), **EVP**___**PKEY**___**[verify**(3)](https://www.chedong.com/phpMan.php/man/verify/3/markdown), [**provider-signature**(7)](https://www.chedong.com/phpMan.php/man/provider-signature/7/markdown),

## 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                    [EVP_SIGNATURE-ECDSA(7SSL)](https://www.chedong.com/phpMan.php/man/EVPSIGNATURE-ECDSA/7SSL/markdown)