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Edit File : RSA_sign.3 \| Size : 6.08 KB
.\" Automatically generated by Pod::Man 4.11 (Pod::Simple 3.35) .\" .\" 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++. 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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" RSA_sign, RSA_verify \- RSA signatures .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include <openssl/rsa.h> \& \& int RSA_sign(int type, const unsigned char m, unsigned int m_len, \& unsigned char sigret, unsigned int siglen, RSA rsa); \& \& int RSA_verify(int type, const unsigned char m, unsigned int m_len, \& unsigned char sigbuf, unsigned int siglen, RSA rsa); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" \&\fBRSA_sign()\fR signs the message digest \fBm\fR of size \fBm_len\fR using the private key \fBrsa\fR using RSASSA\-PKCS1\-v1_5 as specified in \s-1RFC 3447.\s0 It stores the signature in \fBsigret\fR and the signature size in \fBsiglen\fR. \&\fBsigret\fR must point to RSA_size(\fBrsa\fR) bytes of memory. Note that \s-1PKCS\s0 #1 adds meta-data, placing limits on the size of the key that can be used. See \fBRSA_private_encrypt\fR\\|(3) for lower-level operations. .PP \&\fBtype\fR denotes the message digest algorithm that was used to generate \&\fBm\fR. If \fBtype\fR is \fBNID_md5_sha1\fR, an \s-1SSL\s0 signature (\s-1MD5\s0 and \s-1SHA1\s0 message digests with \s-1PKCS\s0 #1 padding and no algorithm identifier) is created. .PP \&\fBRSA_verify()\fR verifies that the signature \fBsigbuf\fR of size \fBsiglen\fR matches a given message digest \fBm\fR of size \fBm_len\fR. \fBtype\fR denotes the message digest algorithm that was used to generate the signature. \&\fBrsa\fR is the signer's public key. .SH "RETURN VALUES" .IX Header "RETURN VALUES" \&\fBRSA_sign()\fR returns 1 on success. \&\fBRSA_verify()\fR returns 1 on successful verification. .PP The error codes can be obtained by \fBERR_get_error\fR\\|(3). .SH "CONFORMING TO" .IX Header "CONFORMING TO" \&\s-1SSL, PKCS\s0 #1 v2.0 .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBERR_get_error\fR\\|(3), \&\fBRSA_private_encrypt\fR\\|(3), \&\fBRSA_public_decrypt\fR\\|(3) .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2000\-2016 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>. Back

Edit File : RSA_sign.3 | Size : 6.08 KB

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.\"
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.\" ========================================================================
.\"
.IX Title "RSA_SIGN 3"
.TH RSA_SIGN 3 "2023-09-11" "1.1.1w" "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"
RSA_sign, RSA_verify \- RSA signatures
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/rsa.h>
\&
\& int RSA_sign(int type, const unsigned char *m, unsigned int m_len,
\&              unsigned char *sigret, unsigned int *siglen, RSA *rsa);
\&
\& int RSA_verify(int type, const unsigned char *m, unsigned int m_len,
\&                unsigned char *sigbuf, unsigned int siglen, RSA *rsa);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBRSA_sign()\fR signs the message digest \fBm\fR of size \fBm_len\fR using the
private key \fBrsa\fR using RSASSA\-PKCS1\-v1_5 as specified in \s-1RFC 3447.\s0 It
stores the signature in \fBsigret\fR and the signature size in \fBsiglen\fR.
\&\fBsigret\fR must point to RSA_size(\fBrsa\fR) bytes of memory.
Note that \s-1PKCS\s0 #1 adds meta-data, placing limits on the size of the
key that can be used.
See \fBRSA_private_encrypt\fR\|(3) for lower-level
operations.
.PP
\&\fBtype\fR denotes the message digest algorithm that was used to generate
\&\fBm\fR.
If \fBtype\fR is \fBNID_md5_sha1\fR,
an \s-1SSL\s0 signature (\s-1MD5\s0 and \s-1SHA1\s0 message digests with \s-1PKCS\s0 #1 padding
and no algorithm identifier) is created.
.PP
\&\fBRSA_verify()\fR verifies that the signature \fBsigbuf\fR of size \fBsiglen\fR
matches a given message digest \fBm\fR of size \fBm_len\fR. \fBtype\fR denotes
the message digest algorithm that was used to generate the signature.
\&\fBrsa\fR is the signer's public key.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBRSA_sign()\fR returns 1 on success.
\&\fBRSA_verify()\fR returns 1 on successful verification.
.PP
The error codes can be obtained by \fBERR_get_error\fR\|(3).
.SH "CONFORMING TO"
.IX Header "CONFORMING TO"
\&\s-1SSL, PKCS\s0 #1 v2.0
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBERR_get_error\fR\|(3),
\&\fBRSA_private_encrypt\fR\|(3),
\&\fBRSA_public_decrypt\fR\|(3)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2000\-2016 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>.

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