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Edit File : RSA_sign.3ssl \| Size : 6.10 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 as specified in \s-1PKCS\s0 #1 v2.0. 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. It usually is one of \fBNID_sha1\fR, \fBNID_ripemd160\fR and \fBNID_md5\fR; see \fBobjects\fR\\|(3) for details. 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, 0 otherwise. \fBRSA_verify()\fR returns 1 on successful verification, 0 otherwise. .PP The error codes can be obtained by \fBERR_get_error\fR\\|(3). .SH "BUGS" .IX Header "BUGS" Certain signatures with an improper algorithm identifier are accepted for compatibility with SSLeay 0.4.5 :\-) .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), \fBobjects\fR\\|(3), \&\fBrsa\fR\\|(3), \fBRSA_private_encrypt\fR\\|(3), \&\fBRSA_public_decrypt\fR\\|(3) .SH "HISTORY" .IX Header "HISTORY" \&\fBRSA_sign()\fR and \fBRSA_verify()\fR are available in all versions of SSLeay and OpenSSL. Back

Edit File : RSA_sign.3ssl | Size : 6.10 KB

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.\"
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.\" ========================================================================
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.if n .sp
..
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.nf
.ne \\$1
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..
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.\" 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
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.\" nothing in troff, for use with C<>.
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.el       .ds Aq '
.\"
.\" If the F register is >0, we'll generate index entries on stderr for
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.\" entries marked with X<> in POD.  Of course, you'll have to process the
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.\"
.\" Avoid warning from groff about undefined register 'F'.
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..
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.\"
.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
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.\" ========================================================================
.\"
.IX Title "RSA_sign 3"
.TH RSA_sign 3 "2019-12-20" "1.0.2u" "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 as specified in \s-1PKCS\s0 #1 v2.0. 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. It usually is one of \fBNID_sha1\fR, \fBNID_ripemd160\fR and \fBNID_md5\fR;
see \fBobjects\fR\|(3) for details. 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, 0 otherwise.  \fBRSA_verify()\fR returns 1
on successful verification, 0 otherwise.
.PP
The error codes can be obtained by \fBERR_get_error\fR\|(3).
.SH "BUGS"
.IX Header "BUGS"
Certain signatures with an improper algorithm identifier are accepted
for compatibility with SSLeay 0.4.5 :\-)
.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), \fBobjects\fR\|(3),
\&\fBrsa\fR\|(3), \fBRSA_private_encrypt\fR\|(3),
\&\fBRSA_public_decrypt\fR\|(3)
.SH "HISTORY"
.IX Header "HISTORY"
\&\fBRSA_sign()\fR and \fBRSA_verify()\fR are available in all versions of SSLeay
and OpenSSL.

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