SkullCyberArmy Bypass Shell

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File Name : X448.7

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.\" ========================================================================
.\"
.IX Title "X25519 7"
.TH X25519 7 "2023-08-01" "1.1.1v" "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"
X25519, X448 \&\- EVP_PKEY X25519 and X448 support
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \fBX25519\fR and \fBX448\fR \s-1EVP_PKEY\s0 implementation supports key generation and
key derivation using \fBX25519\fR and \fBX448\fR. It has associated private and public
key formats compatible with \s-1RFC 8410.\s0
.PP
No additional parameters can be set during key generation.
.PP
The peer public key must be set using \fIEVP_PKEY_derive_set_peer()\fR when
performing key derivation.
.SH "NOTES"
.IX Header "NOTES"
A context for the \fBX25519\fR algorithm can be obtained by calling:
.PP
.Vb 1
\& EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_X25519, NULL);
.Ve
.PP
For the \fBX448\fR algorithm a context can be obtained by calling:
.PP
.Vb 1
\& EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_X448, NULL);
.Ve
.PP
X25519 or X448 private keys can be set directly using
\&\fIEVP_PKEY_new_raw_private_key\fR\|(3) or loaded from a PKCS#8 private key file
using \fIPEM_read_bio_PrivateKey\fR\|(3) (or similar function). Completely new keys
can also be generated (see the example below). Setting a private key also sets
the associated public key.
.PP
X25519 or X448 public keys can be set directly using
\&\fIEVP_PKEY_new_raw_public_key\fR\|(3) or loaded from a SubjectPublicKeyInfo
structure in a \s-1PEM\s0 file using \fIPEM_read_bio_PUBKEY\fR\|(3) (or similar function).
.SH "EXAMPLES"
.IX Header "EXAMPLES"
This example generates an \fBX25519\fR private key and writes it to standard
output in \s-1PEM\s0 format:
.PP
.Vb 9
\& #include <openssl/evp.h>
\& #include <openssl/pem.h>
\& ...
\& EVP_PKEY *pkey = NULL;
\& EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_X25519, NULL);
\& EVP_PKEY_keygen_init(pctx);
\& EVP_PKEY_keygen(pctx, &pkey);
\& EVP_PKEY_CTX_free(pctx);
\& PEM_write_PrivateKey(stdout, pkey, NULL, NULL, 0, NULL, NULL);
.Ve
.PP
The key derivation example in \fIEVP_PKEY_derive\fR\|(3) can be used with
\&\fBX25519\fR and \fBX448\fR.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fIEVP_PKEY_CTX_new\fR\|(3),
\&\fIEVP_PKEY_keygen\fR\|(3),
\&\fIEVP_PKEY_derive\fR\|(3),
\&\fIEVP_PKEY_derive_set_peer\fR\|(3)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2017\-2020 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (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>.

Name	Type	Size	Permission	Last Modified	Actions
.	dir	-	0755	2023-09-12 12:48:18
..	dir	-	0755	2023-08-08 06:57:40
Ed25519.7	text/troff	7.18 KB	0644	2023-08-08 06:57:40
Ed448.7	text/troff	7.18 KB	0644	2023-08-08 06:57:40
RAND.7	text/troff	7.44 KB	0644	2023-08-08 06:57:40
RAND_DRBG.7	text/troff	17.09 KB	0644	2023-08-08 06:57:40
RSA-PSS.7	text/troff	6.05 KB	0644	2023-08-08 06:57:41
SM2.7	text/troff	6.87 KB	0644	2023-08-08 06:57:41
X25519.7	text/troff	6.32 KB	0644	2023-08-08 06:57:41
X448.7	text/troff	6.32 KB	0644	2023-08-08 06:57:41
bio.7	text/troff	7.02 KB	0644	2023-08-08 06:57:41
crypto.7	text/troff	5.87 KB	0644	2023-08-08 06:57:41
ct.7	text/troff	5.51 KB	0644	2023-08-08 06:57:41
des_modes.7	text/troff	10.47 KB	0644	2023-08-08 06:57:41
evp.7	text/troff	9.36 KB	0644	2023-08-08 06:57:41
ossl_store-file.7	text/x-c	6.29 KB	0644	2023-08-08 06:57:41
ossl_store.7	text/x-c	6.68 KB	0644	2023-08-08 06:57:41
passphrase-encoding.7	text/troff	11.57 KB	0644	2023-08-08 06:57:41
proxy-certificates.7	text/troff	16.87 KB	0644	2023-08-08 06:57:42
scrypt.7	text/troff	8.09 KB	0644	2023-08-08 06:57:42
ssl.7	text/troff	50.63 KB	0644	2023-08-08 06:57:42
x509.7	text/troff	6.54 KB	0644	2023-08-08 06:57:42