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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 19:43:11 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 19:43:11 +0000 |
commit | fc22b3d6507c6745911b9dfcc68f1e665ae13dbc (patch) | |
tree | ce1e3bce06471410239a6f41282e328770aa404a /upstream/debian-bookworm/man3/EVP_PKEY_verify.3ssl | |
parent | Initial commit. (diff) | |
download | manpages-l10n-fc22b3d6507c6745911b9dfcc68f1e665ae13dbc.tar.xz manpages-l10n-fc22b3d6507c6745911b9dfcc68f1e665ae13dbc.zip |
Adding upstream version 4.22.0.upstream/4.22.0
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'upstream/debian-bookworm/man3/EVP_PKEY_verify.3ssl')
-rw-r--r-- | upstream/debian-bookworm/man3/EVP_PKEY_verify.3ssl | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/upstream/debian-bookworm/man3/EVP_PKEY_verify.3ssl b/upstream/debian-bookworm/man3/EVP_PKEY_verify.3ssl new file mode 100644 index 00000000..e0186b90 --- /dev/null +++ b/upstream/debian-bookworm/man3/EVP_PKEY_verify.3ssl @@ -0,0 +1,245 @@ +.\" Automatically generated by Pod::Man 4.14 (Pod::Simple 3.43) +.\" +.\" Standard preamble: +.\" ======================================================================== +.de Sp \" Vertical space (when we can't use .PP) +.if t .sp .5v +.if n .sp +.. +.de Vb \" Begin verbatim text +.ft CW +.nf +.ne \\$1 +.. +.de Ve \" End verbatim text +.ft R +.fi +.. +.\" Set up some character translations and predefined strings. \*(-- will +.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left +.\" double quote, and \*(R" will give a right double quote. \*(C+ will +.\" give a nicer C++. Capital omega is used to do unbreakable dashes and +.\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff, +.\" nothing in troff, for use with C<>. +.tr \(*W- +.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p' +.ie n \{\ +. ds -- \(*W- +. ds PI pi +. if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch +. if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch +. ds L" "" +. ds R" "" +. ds C` "" +. ds C' "" +'br\} +.el\{\ +. ds -- \|\(em\| +. ds PI \(*p +. ds L" `` +. ds R" '' +. ds C` +. ds C' +'br\} +.\" +.\" Escape single quotes in literal strings from groff's Unicode transform. +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" +.\" If the F register is >0, we'll generate index entries on stderr for +.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index +.\" entries marked with X<> in POD. Of course, you'll have to process the +.\" output yourself in some meaningful fashion. +.\" +.\" Avoid warning from groff about undefined register 'F'. +.de IX +.. +.nr rF 0 +.if \n(.g .if rF .nr rF 1 +.if (\n(rF:(\n(.g==0)) \{\ +. if \nF \{\ +. de IX +. tm Index:\\$1\t\\n%\t"\\$2" +.. +. if !\nF==2 \{\ +. nr % 0 +. nr F 2 +. \} +. \} +.\} +.rr rF +.\" +.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2). +.\" Fear. Run. Save yourself. 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Always turn off hyphenation; it makes +.\" way too many mistakes in technical documents. +.if n .ad l +.nh +.SH "NAME" +EVP_PKEY_verify_init, EVP_PKEY_verify_init_ex, EVP_PKEY_verify +\&\- signature verification using a public key algorithm +.SH "SYNOPSIS" +.IX Header "SYNOPSIS" +.Vb 1 +\& #include <openssl/evp.h> +\& +\& int EVP_PKEY_verify_init(EVP_PKEY_CTX *ctx); +\& int EVP_PKEY_verify_init_ex(EVP_PKEY_CTX *ctx, const OSSL_PARAM params[]); +\& int EVP_PKEY_verify(EVP_PKEY_CTX *ctx, +\& const unsigned char *sig, size_t siglen, +\& const unsigned char *tbs, size_t tbslen); +.Ve +.SH "DESCRIPTION" +.IX Header "DESCRIPTION" +\&\fBEVP_PKEY_verify_init()\fR initializes a public key algorithm context \fIctx\fR for +signing using the algorithm given when the context was created +using \fBEVP_PKEY_CTX_new\fR\|(3) or variants thereof. The algorithm is used to +fetch a \fB\s-1EVP_SIGNATURE\s0\fR method implicitly, see \*(L"Implicit fetch\*(R" in \fBprovider\fR\|(7) +for more information about implicit fetches. +.PP +\&\fBEVP_PKEY_verify_init_ex()\fR is the same as \fBEVP_PKEY_verify_init()\fR but additionally +sets the passed parameters \fIparams\fR on the context before returning. +.PP +The \fBEVP_PKEY_verify()\fR function performs a public key verification operation +using \fIctx\fR. The signature is specified using the \fIsig\fR and +\&\fIsiglen\fR parameters. The verified data (i.e. the data believed originally +signed) is specified using the \fItbs\fR and \fItbslen\fR parameters. +.SH "NOTES" +.IX Header "NOTES" +After the call to \fBEVP_PKEY_verify_init()\fR algorithm specific control +operations can be performed to set any appropriate parameters for the +operation. +.PP +The function \fBEVP_PKEY_verify()\fR can be called more than once on the same +context if several operations are performed using the same parameters. +.SH "RETURN VALUES" +.IX Header "RETURN VALUES" +\&\fBEVP_PKEY_verify_init()\fR and \fBEVP_PKEY_verify()\fR return 1 if the verification was +successful and 0 if it failed. Unlike other functions the return value 0 from +\&\fBEVP_PKEY_verify()\fR only indicates that the signature did not verify +successfully (that is tbs did not match the original data or the signature was +of invalid form) it is not an indication of a more serious error. +.PP +A negative value indicates an error other that signature verification failure. +In particular a return value of \-2 indicates the operation is not supported by +the public key algorithm. +.SH "EXAMPLES" +.IX Header "EXAMPLES" +Verify signature using PKCS#1 and \s-1SHA256\s0 digest: +.PP +.Vb 2 +\& #include <openssl/evp.h> +\& #include <openssl/rsa.h> +\& +\& EVP_PKEY_CTX *ctx; +\& unsigned char *md, *sig; +\& size_t mdlen, siglen; +\& EVP_PKEY *verify_key; +\& +\& /* +\& * NB: assumes verify_key, sig, siglen md and mdlen are already set up +\& * and that verify_key is an RSA public key +\& */ +\& ctx = EVP_PKEY_CTX_new(verify_key, NULL /* no engine */); +\& if (!ctx) +\& /* Error occurred */ +\& if (EVP_PKEY_verify_init(ctx) <= 0) +\& /* Error */ +\& if (EVP_PKEY_CTX_set_rsa_padding(ctx, RSA_PKCS1_PADDING) <= 0) +\& /* Error */ +\& if (EVP_PKEY_CTX_set_signature_md(ctx, EVP_sha256()) <= 0) +\& /* Error */ +\& +\& /* Perform operation */ +\& ret = EVP_PKEY_verify(ctx, sig, siglen, md, mdlen); +\& +\& /* +\& * ret == 1 indicates success, 0 verify failure and < 0 for some +\& * other error. +\& */ +.Ve +.SH "SEE ALSO" +.IX Header "SEE ALSO" +\&\fBEVP_PKEY_CTX_new\fR\|(3), +\&\fBEVP_PKEY_encrypt\fR\|(3), +\&\fBEVP_PKEY_decrypt\fR\|(3), +\&\fBEVP_PKEY_sign\fR\|(3), +\&\fBEVP_PKEY_verify_recover\fR\|(3), +\&\fBEVP_PKEY_derive\fR\|(3) +.SH "HISTORY" +.IX Header "HISTORY" +The \fBEVP_PKEY_verify_init()\fR and \fBEVP_PKEY_verify()\fR functions were added in +OpenSSL 1.0.0. +.PP +The \fBEVP_PKEY_verify_init_ex()\fR function was added in OpenSSL 3.0. +.SH "COPYRIGHT" +.IX Header "COPYRIGHT" +Copyright 2006\-2021 The OpenSSL Project Authors. All Rights Reserved. +.PP +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>. |