diff options
Diffstat (limited to 'secure/lib/libcrypto/man/man3/EVP_chacha20.3')
| -rw-r--r-- | secure/lib/libcrypto/man/man3/EVP_chacha20.3 | 33 |
1 files changed, 21 insertions, 12 deletions
diff --git a/secure/lib/libcrypto/man/man3/EVP_chacha20.3 b/secure/lib/libcrypto/man/man3/EVP_chacha20.3 index 3513daa7ee13..db996e6d4422 100644 --- a/secure/lib/libcrypto/man/man3/EVP_chacha20.3 +++ b/secure/lib/libcrypto/man/man3/EVP_chacha20.3 @@ -1,4 +1,4 @@ -.\" Automatically generated by Pod::Man 4.14 (Pod::Simple 3.40) +.\" Automatically generated by Pod::Man 4.14 (Pod::Simple 3.42) .\" .\" Standard preamble: .\" ======================================================================== @@ -68,8 +68,6 @@ . \} .\} .rr rF -.\" -.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2). .\" Fear. Run. Save yourself. No user-serviceable parts. . \" fudge factors for nroff and troff .if n \{\ @@ -132,21 +130,23 @@ .rm #[ #] #H #V #F C .\" ======================================================================== .\" -.IX Title "EVP_CHACHA20 3" -.TH EVP_CHACHA20 3 "2022-07-05" "1.1.1q" "OpenSSL" +.IX Title "EVP_CHACHA20 3ossl" +.TH EVP_CHACHA20 3ossl "2023-09-19" "3.0.11" "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" -EVP_chacha20, EVP_chacha20_poly1305 \&\- EVP ChaCha20 stream cipher +EVP_chacha20, +EVP_chacha20_poly1305 +\&\- EVP ChaCha20 stream cipher .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include <openssl/evp.h> \& -\& const EVP_CIPHER *EVP_chacha20(void) -\& const EVP_CIPHER *EVP_chacha20_poly1305(void) +\& const EVP_CIPHER *EVP_chacha20(void); +\& const EVP_CIPHER *EVP_chacha20_poly1305(void); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" @@ -154,10 +154,10 @@ The ChaCha20 stream cipher for \s-1EVP.\s0 .IP "\fBEVP_chacha20()\fR" 4 .IX Item "EVP_chacha20()" The ChaCha20 stream cipher. The key length is 256 bits, the \s-1IV\s0 is 128 bits long. -The first 32 bits consists of a counter in little-endian order followed by a 96 +The first 64 bits consists of a counter in little-endian order followed by a 64 bit nonce. For example a nonce of: .Sp -000000000000000000000002 +0000000000000002 .Sp With an initial counter of 42 (2a in hex) would be expressed as: .Sp @@ -168,6 +168,15 @@ Authenticated encryption with ChaCha20\-Poly1305. Like \fBEVP_chacha20()\fR, the is 256 bits and the \s-1IV\s0 is 96 bits. This supports additional authenticated data (\s-1AAD\s0) and produces a 128\-bit authentication tag. See the \&\*(L"\s-1AEAD\s0 Interface\*(R" in \fBEVP_EncryptInit\fR\|(3) section for more information. +.SH "NOTES" +.IX Header "NOTES" +Developers should be aware of the negative performance implications of +calling these functions multiple times and should consider using +\&\fBEVP_CIPHER_fetch\fR\|(3) instead. +See \*(L"Performance\*(R" in \fBcrypto\fR\|(7) for further information. +.PP +\&\s-1RFC 7539\s0 <https://www.rfc-editor.org/rfc/rfc7539.html#section-2.4> +uses a 32 bit counter and a 96 bit nonce for the \s-1IV.\s0 .SH "RETURN VALUES" .IX Header "RETURN VALUES" These functions return an \fB\s-1EVP_CIPHER\s0\fR structure that contains the @@ -180,9 +189,9 @@ details of the \fB\s-1EVP_CIPHER\s0\fR structure. \&\fBEVP_CIPHER_meth_new\fR\|(3) .SH "COPYRIGHT" .IX Header "COPYRIGHT" -Copyright 2017\-2019 The OpenSSL Project Authors. All Rights Reserved. +Copyright 2017\-2023 The OpenSSL Project Authors. All Rights Reserved. .PP -Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use +Licensed under the Apache License 2.0 (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>. |