2020-04-15 01:06:12 +08:00
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=pod
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=head1 NAME
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EVP_PKEY-X25519, EVP_PKEY-X448, EVP_PKEY-ED25519, EVP_PKEY-ED448,
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EVP_KEYMGMT-X25519, EVP_KEYMGMT-X448, EVP_KEYMGMT-ED25519, EVP_KEYMGMT-ED448
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- EVP_PKEY X25519, X448, ED25519 and ED448 keytype and algorithm support
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=head1 DESCRIPTION
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The B<X25519>, B<X448>, B<ED25519> and B<ED448> keytypes are
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implemented in OpenSSL's default provider.
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=head2 Common X25519, X448, ED25519 and ED448 parameters
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The following Import/Export types are available for the built-in X25519, X448,
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ED25519 and X448 algorithms:
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=over 4
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=item "pub" (B<OSSL_PKEY_PARAM_PUB_KEY>) <octet string>
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The public key value.
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=item "priv" (B<OSSL_PKEY_PARAM_PRIV_KEY>) <octet string>
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The private key value.
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=back
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2020-04-20 15:29:47 +08:00
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=head2 ED25519 and ED448 parameters
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=over 4
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=item "mandatory-digest" (B<OSSL_PKEY_PARAM_MANDATORY_DIGEST>) <utf8 string>
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The empty string, signifying that no digest may be specified.
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=back
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2020-04-15 01:06:12 +08:00
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=head1 CONFORMING TO
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=over 4
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=item RFC 8032
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=back
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=head1 EXAMPLES
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An B<EVP_PKEY> context can be obtained by calling:
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EVP_PKEY_CTX *pctx =
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EVP_PKEY_CTX_new_from_name(NULL, "X25519", NULL);
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EVP_PKEY_CTX *pctx =
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EVP_PKEY_CTX_new_from_name(NULL, "X448", NULL);
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EVP_PKEY_CTX *pctx =
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EVP_PKEY_CTX_new_from_name(NULL, "ED25519", NULL);
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EVP_PKEY_CTX *pctx =
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EVP_PKEY_CTX_new_from_name(NULL, "ED448", NULL);
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An B<ED25519> key can be generated like this:
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EVP_PKEY *pkey = NULL;
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EVP_PKEY_CTX *pctx =
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EVP_PKEY_CTX_new_from_name(NULL, "ED25519", NULL);
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EVP_PKEY_keygen_init(pctx);
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EVP_PKEY_gen(pctx, &pkey);
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EVP_PKEY_CTX_free(pctx);
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An B<X25519> key can be generated in a similar way:
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EVP_PKEY *pkey = NULL;
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EVP_PKEY_CTX *pctx =
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EVP_PKEY_CTX_new_from_name(NULL, "X25519", NULL);
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EVP_PKEY_keygen_init(pctx);
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EVP_PKEY_gen(pctx, &pkey);
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EVP_PKEY_CTX_free(pctx);
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=head1 SEE ALSO
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L<EVP_KEYMGMT(3)>, L<EVP_PKEY(3)>, L<provider-keymgmt(7)>,
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L<EVP_KEYEXCH-X25519(7)>, L<EVP_KEYEXCH-X448(7)>,
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L<EVP_SIGNATURE-ED25519(7)>, L<EVP_SIGNATURE-ED448(7)>
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=head1 COPYRIGHT
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Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the Apache License 2.0 (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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