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Name	Size	Permission	Date
img	[ DIR ]	drwxr-xr-x	2025-02-06 06:22
EVP_ASYM_CIPHER-SM2.html	2.21 KB	-rw-r--r--	2025-02-06 06:22
EVP_CIPHER-AES.html	4.63 KB	-rw-r--r--	2025-02-06 06:22
EVP_CIPHER-ARIA.html	3.22 KB	-rw-r--r--	2025-02-06 06:22
EVP_CIPHER-BLOWFISH.html	2.04 KB	-rw-r--r--	2025-02-06 06:22
EVP_CIPHER-CAMELLIA.html	3.17 KB	-rw-r--r--	2025-02-06 06:22
EVP_CIPHER-CAST.html	2.4 KB	-rw-r--r--	2025-02-06 06:22
EVP_CIPHER-CHACHA.html	1.96 KB	-rw-r--r--	2025-02-06 06:22
EVP_CIPHER-DES.html	3.15 KB	-rw-r--r--	2025-02-06 06:22
EVP_CIPHER-IDEA.html	2.12 KB	-rw-r--r--	2025-02-06 06:22
EVP_CIPHER-RC2.html	2.26 KB	-rw-r--r--	2025-02-06 06:22
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EVP_CIPHER-RC5.html	2.14 KB	-rw-r--r--	2025-02-06 06:22
EVP_CIPHER-SEED.html	2.15 KB	-rw-r--r--	2025-02-06 06:22
EVP_CIPHER-SM4.html	2.17 KB	-rw-r--r--	2025-02-06 06:22
EVP_KDF-HKDF.html	7.44 KB	-rw-r--r--	2025-02-06 06:22
EVP_KDF-KB.html	8.21 KB	-rw-r--r--	2025-02-06 06:22
EVP_KDF-KRB5KDF.html	5.37 KB	-rw-r--r--	2025-02-06 06:22
EVP_KDF-PBKDF1.html	3.85 KB	-rw-r--r--	2025-02-06 06:22
EVP_KDF-PBKDF2.html	4.66 KB	-rw-r--r--	2025-02-06 06:22
EVP_KDF-PKCS12KDF.html	4.11 KB	-rw-r--r--	2025-02-06 06:22
EVP_KDF-SCRYPT.html	7.08 KB	-rw-r--r--	2025-02-06 06:22
EVP_KDF-SS.html	8.43 KB	-rw-r--r--	2025-02-06 06:22
EVP_KDF-SSHKDF.html	7.24 KB	-rw-r--r--	2025-02-06 06:22
EVP_KDF-TLS13_KDF.html	6.5 KB	-rw-r--r--	2025-02-06 06:22
EVP_KDF-TLS1_PRF.html	4.9 KB	-rw-r--r--	2025-02-06 06:22
EVP_KDF-X942-ASN1.html	7.41 KB	-rw-r--r--	2025-02-06 06:22
EVP_KDF-X942-CONCAT.html	1.78 KB	-rw-r--r--	2025-02-06 06:22
EVP_KDF-X963.html	4.86 KB	-rw-r--r--	2025-02-06 06:22
EVP_KEM-RSA.html	2.85 KB	-rw-r--r--	2025-02-06 06:22
EVP_KEYEXCH-DH.html	6.42 KB	-rw-r--r--	2025-02-06 06:22
EVP_KEYEXCH-ECDH.html	6.21 KB	-rw-r--r--	2025-02-06 06:22
EVP_KEYEXCH-X25519.html	2.5 KB	-rw-r--r--	2025-02-06 06:22
EVP_MAC-BLAKE2.html	4.25 KB	-rw-r--r--	2025-02-06 06:22
EVP_MAC-CMAC.html	3.77 KB	-rw-r--r--	2025-02-06 06:22
EVP_MAC-GMAC.html	3.69 KB	-rw-r--r--	2025-02-06 06:22
EVP_MAC-HMAC.html	4.54 KB	-rw-r--r--	2025-02-06 06:22
EVP_MAC-KMAC.html	6.46 KB	-rw-r--r--	2025-02-06 06:22
EVP_MAC-Poly1305.html	3.17 KB	-rw-r--r--	2025-02-06 06:22
EVP_MAC-Siphash.html	3.29 KB	-rw-r--r--	2025-02-06 06:22
EVP_MD-BLAKE2.html	2.11 KB	-rw-r--r--	2025-02-06 06:22
EVP_MD-MD2.html	1.83 KB	-rw-r--r--	2025-02-06 06:22
EVP_MD-MD4.html	1.83 KB	-rw-r--r--	2025-02-06 06:22
EVP_MD-MD5-SHA1.html	3 KB	-rw-r--r--	2025-02-06 06:22
EVP_MD-MD5.html	1.83 KB	-rw-r--r--	2025-02-06 06:22
EVP_MD-MDC2.html	2.64 KB	-rw-r--r--	2025-02-06 06:22
EVP_MD-RIPEMD160.html	2.1 KB	-rw-r--r--	2025-02-06 06:22
EVP_MD-SHA1.html	3.03 KB	-rw-r--r--	2025-02-06 06:22
EVP_MD-SHA2.html	2.85 KB	-rw-r--r--	2025-02-06 06:22
EVP_MD-SHA3.html	2.16 KB	-rw-r--r--	2025-02-06 06:22
EVP_MD-SHAKE.html	3.98 KB	-rw-r--r--	2025-02-06 06:22
EVP_MD-SM3.html	1.84 KB	-rw-r--r--	2025-02-06 06:22
EVP_MD-WHIRLPOOL.html	1.86 KB	-rw-r--r--	2025-02-06 06:22
EVP_MD-common.html	2.88 KB	-rw-r--r--	2025-02-06 06:22
EVP_PKEY-DH.html	15.63 KB	-rw-r--r--	2025-02-06 06:22
EVP_PKEY-DSA.html	6.09 KB	-rw-r--r--	2025-02-06 06:22
EVP_PKEY-EC.html	14.04 KB	-rw-r--r--	2025-02-06 06:22
EVP_PKEY-FFC.html	11.47 KB	-rw-r--r--	2025-02-06 06:22
EVP_PKEY-HMAC.html	4.69 KB	-rw-r--r--	2025-02-06 06:22
EVP_PKEY-RSA.html	15.32 KB	-rw-r--r--	2025-02-06 06:22
EVP_PKEY-SM2.html	4.65 KB	-rw-r--r--	2025-02-06 06:22
EVP_PKEY-X25519.html	5.03 KB	-rw-r--r--	2025-02-06 06:22
EVP_RAND-CTR-DRBG.html	5.56 KB	-rw-r--r--	2025-02-06 06:22
EVP_RAND-HASH-DRBG.html	5.2 KB	-rw-r--r--	2025-02-06 06:22
EVP_RAND-HMAC-DRBG.html	5.39 KB	-rw-r--r--	2025-02-06 06:22
EVP_RAND-SEED-SRC.html	3.69 KB	-rw-r--r--	2025-02-06 06:22
EVP_RAND-TEST-RAND.html	6 KB	-rw-r--r--	2025-02-06 06:22
EVP_RAND.html	15.67 KB	-rw-r--r--	2025-02-06 06:22
EVP_SIGNATURE-DSA.html	2.92 KB	-rw-r--r--	2025-02-06 06:22
EVP_SIGNATURE-ECDSA.html	2.93 KB	-rw-r--r--	2025-02-06 06:22
EVP_SIGNATURE-ED25519.html	5.02 KB	-rw-r--r--	2025-02-06 06:22
EVP_SIGNATURE-HMAC.html	2.96 KB	-rw-r--r--	2025-02-06 06:22
EVP_SIGNATURE-RSA.html	5.58 KB	-rw-r--r--	2025-02-06 06:22
OSSL_PROVIDER-FIPS.html	19.9 KB	-rw-r--r--	2025-02-06 06:22
OSSL_PROVIDER-base.html	4.06 KB	-rw-r--r--	2025-02-06 06:22
OSSL_PROVIDER-default.html	13.14 KB	-rw-r--r--	2025-02-06 06:22
OSSL_PROVIDER-legacy.html	5.08 KB	-rw-r--r--	2025-02-06 06:22
OSSL_PROVIDER-null.html	1.75 KB	-rw-r--r--	2025-02-06 06:22
RAND.html	4.49 KB	-rw-r--r--	2025-02-06 06:22
RSA-PSS.html	3.29 KB	-rw-r--r--	2025-02-06 06:22
X25519.html	3.57 KB	-rw-r--r--	2025-02-06 06:22
bio.html	4.47 KB	-rw-r--r--	2025-02-06 06:22
crypto.html	27.34 KB	-rw-r--r--	2025-02-06 06:22
ct.html	2.71 KB	-rw-r--r--	2025-02-06 06:22
des_modes.html	7.94 KB	-rw-r--r--	2025-02-06 06:22
evp.html	7.56 KB	-rw-r--r--	2025-02-06 06:22
fips_module.html	22.56 KB	-rw-r--r--	2025-02-06 06:22
life_cycle-cipher.html	15.05 KB	-rw-r--r--	2025-02-06 06:22
life_cycle-digest.html	7.91 KB	-rw-r--r--	2025-02-06 06:22
life_cycle-kdf.html	5.43 KB	-rw-r--r--	2025-02-06 06:22
life_cycle-mac.html	7.63 KB	-rw-r--r--	2025-02-06 06:22
life_cycle-pkey.html	31.16 KB	-rw-r--r--	2025-02-06 06:22
life_cycle-rand.html	6.68 KB	-rw-r--r--	2025-02-06 06:22
migration_guide.html	123.13 KB	-rw-r--r--	2025-02-06 06:22
openssl-core.h.html	5.78 KB	-rw-r--r--	2025-02-06 06:22
openssl-core_dispatch.h.html	2.34 KB	-rw-r--r--	2025-02-06 06:22
openssl-core_names.h.html	2.58 KB	-rw-r--r--	2025-02-06 06:22
openssl-env.html	4.87 KB	-rw-r--r--	2025-02-06 06:22
openssl-glossary.html	9.71 KB	-rw-r--r--	2025-02-06 06:22
openssl-threads.html	5.79 KB	-rw-r--r--	2025-02-06 06:22
openssl_user_macros.html	3.89 KB	-rw-r--r--	2025-02-06 06:22
ossl_store-file.html	3.22 KB	-rw-r--r--	2025-02-06 06:22
ossl_store.html	3.96 KB	-rw-r--r--	2025-02-06 06:22
passphrase-encoding.html	8.83 KB	-rw-r--r--	2025-02-06 06:22
property.html	7.97 KB	-rw-r--r--	2025-02-06 06:22
provider-asym_cipher.html	14.77 KB	-rw-r--r--	2025-02-06 06:22
provider-base.html	37.71 KB	-rw-r--r--	2025-02-06 06:22
provider-cipher.html	14.16 KB	-rw-r--r--	2025-02-06 06:22
provider-decoder.html	13.65 KB	-rw-r--r--	2025-02-06 06:22
provider-digest.html	14.65 KB	-rw-r--r--	2025-02-06 06:22
provider-encoder.html	14.68 KB	-rw-r--r--	2025-02-06 06:22
provider-kdf.html	16.91 KB	-rw-r--r--	2025-02-06 06:22
provider-kem.html	11.05 KB	-rw-r--r--	2025-02-06 06:22
provider-keyexch.html	12.67 KB	-rw-r--r--	2025-02-06 06:22
provider-keymgmt.html	20.84 KB	-rw-r--r--	2025-02-06 06:22
provider-mac.html	11.35 KB	-rw-r--r--	2025-02-06 06:22
provider-object.html	8.26 KB	-rw-r--r--	2025-02-06 06:22
provider-rand.html	15.49 KB	-rw-r--r--	2025-02-06 06:22
provider-signature.html	25.29 KB	-rw-r--r--	2025-02-06 06:22
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provider.html	11.75 KB	-rw-r--r--	2025-02-06 06:22
proxy-certificates.html	14.22 KB	-rw-r--r--	2025-02-06 06:22
ssl.html	5.33 KB	-rw-r--r--	2025-02-06 06:22
x509.html	3.75 KB	-rw-r--r--	2025-02-06 06:22

Rename

<?xml version="1.0" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>EVP_SIGNATURE-ED25519</title>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<link rev="made" href="mailto:root@localhost" />
</head>

<ul id="index">
  <li><a href="#NAME">NAME</a></li>
  <li><a href="#DESCRIPTION">DESCRIPTION</a>
    <ul>
      <li><a href="#ED25519-and-ED448-Signature-Parameters">ED25519 and ED448 Signature Parameters</a></li>
    </ul>
  </li>
  <li><a href="#NOTES">NOTES</a></li>
  <li><a href="#EXAMPLES">EXAMPLES</a></li>
  <li><a href="#SEE-ALSO">SEE ALSO</a></li>
  <li><a href="#COPYRIGHT">COPYRIGHT</a></li>
</ul>

<p>EVP_SIGNATURE-ED25519, EVP_SIGNATURE-ED448, Ed25519, Ed448 - EVP_PKEY Ed25519 and Ed448 support</p>

<h1 id="DESCRIPTION">DESCRIPTION</h1>

<p>The <b>Ed25519</b> and <b>Ed448</b> EVP_PKEY implementation supports key generation, one-shot digest sign and digest verify using PureEdDSA and <b>Ed25519</b> or <b>Ed448</b> (see RFC8032). It has associated private and public key formats compatible with RFC 8410.</p>

<h2 id="ED25519-and-ED448-Signature-Parameters">ED25519 and ED448 Signature Parameters</h2>

<p>No additional parameters can be set during one-shot signing or verification. In particular, because PureEdDSA is used, a digest must <b>NOT</b> be specified when signing or verifying. See <a href="../man7/EVP_PKEY-X25519.html">EVP_PKEY-X25519(7)</a> for information related to <b>X25519</b> and <b>X448</b> keys.</p>

<p>The following signature parameters can be retrieved using EVP_PKEY_CTX_get_params().</p>

<dl>

<dt id="algorithm-id-OSSL_SIGNATURE_PARAM_ALGORITHM_ID-octet-string">&quot;algorithm-id&quot; (<b>OSSL_SIGNATURE_PARAM_ALGORITHM_ID</b>) &lt;octet string&gt;</dt>
<dd>

<p>The parameters are described in <a href="../man7/provider-signature.html">provider-signature(7)</a>.</p>

</dd>
</dl>

<h1 id="NOTES">NOTES</h1>

<p>The PureEdDSA algorithm does not support the streaming mechanism of other signature algorithms using, for example, EVP_DigestUpdate(). The message to sign or verify must be passed using the one-shot EVP_DigestSign() and EVP_DigestVerify() functions.</p>

<p>When calling EVP_DigestSignInit() or EVP_DigestVerifyInit(), the digest <i>type</i> parameter <b>MUST</b> be set to NULL.</p>

<p>Applications wishing to sign certificates (or other structures such as CRLs or certificate requests) using Ed25519 or Ed448 can either use X509_sign() or X509_sign_ctx() in the usual way.</p>

<p>Ed25519 or Ed448 private keys can be set directly using <a href="../man3/EVP_PKEY_new_raw_private_key.html">EVP_PKEY_new_raw_private_key(3)</a> or loaded from a PKCS#8 private key file using <a href="../man3/PEM_read_bio_PrivateKey.html">PEM_read_bio_PrivateKey(3)</a> (or similar function). Completely new keys can also be generated (see the example below). Setting a private key also sets the associated public key.</p>

<p>Ed25519 or Ed448 public keys can be set directly using <a href="../man3/EVP_PKEY_new_raw_public_key.html">EVP_PKEY_new_raw_public_key(3)</a> or loaded from a SubjectPublicKeyInfo structure in a PEM file using <a href="../man3/PEM_read_bio_PUBKEY.html">PEM_read_bio_PUBKEY(3)</a> (or similar function).</p>

<p>Ed25519 and Ed448 can be tested with the <a href="../man1/openssl-speed.html">openssl-speed(1)</a> application since version 1.1.1. Valid algorithm names are <b>ed25519</b>, <b>ed448</b> and <b>eddsa</b>. If <b>eddsa</b> is specified, then both Ed25519 and Ed448 are benchmarked.</p>

<h1 id="EXAMPLES">EXAMPLES</h1>

<p>To sign a message using a ED25519 or ED448 key:</p>

<pre><code>    void do_sign(EVP_PKEY *ed_key, unsigned char *msg, size_t msg_len)
    {
        size_t sig_len;
        unsigned char *sig = NULL;
        EVP_MD_CTX *md_ctx = EVP_MD_CTX_new();

EVP_DigestSignInit(md_ctx, NULL, NULL, NULL, ed_key);
        /* Calculate the requires size for the signature by passing a NULL buffer */
        EVP_DigestSign(md_ctx, NULL, &amp;sig_len, msg, msg_len);
        sig = OPENSSL_zalloc(sig_len);

EVP_DigestSign(md_ctx, sig, &amp;sig_len, msg, msg_len);
        ...
        OPENSSL_free(sig);
        EVP_MD_CTX_free(md_ctx);
    }</code></pre>

<p><a href="../man7/EVP_PKEY-X25519.html">EVP_PKEY-X25519(7)</a> <a href="../man7/provider-signature.html">provider-signature(7)</a>, <a href="../man3/EVP_DigestSignInit.html">EVP_DigestSignInit(3)</a>, <a href="../man3/EVP_DigestVerifyInit.html">EVP_DigestVerifyInit(3)</a>,</p>

<h1 id="COPYRIGHT">COPYRIGHT</h1>

<p>Licensed under the Apache License 2.0 (the &quot;License&quot;). 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 <a href="https://www.openssl.org/source/license.html">https://www.openssl.org/source/license.html</a>.</p>

</body>

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