- NAME
- DESCRIPTION

- ECDSA Signature Parameters

- SEE ALSO
- COPYRIGHT

# NAME

EVP_SIGNATURE-ECDSA - The EVP_PKEY ECDSA signature implementation.

# DESCRIPTION

Support for computing ECDSA signatures. See EVP_PKEY-EC(7) 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>
"nonce-type" (OSSL_SIGNATURE_PARAM_NONCE_TYPE) <unsigned integer>

  These 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>

  The parameters are described in provider-signature(7).

# SEE ALSO

EVP_PKEY_CTX_set_params(3), EVP_PKEY_sign(3), EVP_PKEY_verify(3), provider-signature(7),

# COPYRIGHT

Copyright 2020-2023 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.