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Diffstat (limited to 'secure/lib/libcrypto/man/DSA_sign.3')
| -rw-r--r-- | secure/lib/libcrypto/man/DSA_sign.3 | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/secure/lib/libcrypto/man/DSA_sign.3 b/secure/lib/libcrypto/man/DSA_sign.3 new file mode 100644 index 0000000..f72f31e --- /dev/null +++ b/secure/lib/libcrypto/man/DSA_sign.3 @@ -0,0 +1,188 @@ +.\" Automatically generated by Pod::Man 2.25 (Pod::Simple 3.23) +.\" +.\" 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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Of course, you'll have to process the +.\" output yourself in some meaningful fashion. +.ie \nF \{\ +. de IX +. tm Index:\\$1\t\\n%\t"\\$2" +.. +. nr % 0 +. rr F +.\} +.el \{\ +. de IX +.. +.\} +.\" +.\" 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" +DSA_sign, DSA_sign_setup, DSA_verify \- DSA signatures +.SH "SYNOPSIS" +.IX Header "SYNOPSIS" +.Vb 1 +\& #include <openssl/dsa.h> +\& +\& int DSA_sign(int type, const unsigned char *dgst, int len, +\& unsigned char *sigret, unsigned int *siglen, DSA *dsa); +\& +\& int DSA_sign_setup(DSA *dsa, BN_CTX *ctx, BIGNUM **kinvp, +\& BIGNUM **rp); +\& +\& int DSA_verify(int type, const unsigned char *dgst, int len, +\& unsigned char *sigbuf, int siglen, DSA *dsa); +.Ve +.SH "DESCRIPTION" +.IX Header "DESCRIPTION" +\&\fIDSA_sign()\fR computes a digital signature on the \fBlen\fR byte message +digest \fBdgst\fR using the private key \fBdsa\fR and places its \s-1ASN\s0.1 \s-1DER\s0 +encoding at \fBsigret\fR. The length of the signature is places in +*\fBsiglen\fR. \fBsigret\fR must point to DSA_size(\fBdsa\fR) bytes of memory. +.PP +\&\fIDSA_sign_setup()\fR may be used to precompute part of the signing +operation in case signature generation is time-critical. It expects +\&\fBdsa\fR to contain \s-1DSA\s0 parameters. It places the precomputed values +in newly allocated \fB\s-1BIGNUM\s0\fRs at *\fBkinvp\fR and *\fBrp\fR, after freeing +the old ones unless *\fBkinvp\fR and *\fBrp\fR are \s-1NULL\s0. These values may +be passed to \fIDSA_sign()\fR in \fBdsa\->kinv\fR and \fBdsa\->r\fR. +\&\fBctx\fR is a pre-allocated \fB\s-1BN_CTX\s0\fR or \s-1NULL\s0. +.PP +\&\fIDSA_verify()\fR verifies that the signature \fBsigbuf\fR of size \fBsiglen\fR +matches a given message digest \fBdgst\fR of size \fBlen\fR. +\&\fBdsa\fR is the signer's public key. +.PP +The \fBtype\fR parameter is ignored. +.PP +The \s-1PRNG\s0 must be seeded before \fIDSA_sign()\fR (or \fIDSA_sign_setup()\fR) +is called. +.SH "RETURN VALUES" +.IX Header "RETURN VALUES" +\&\fIDSA_sign()\fR and \fIDSA_sign_setup()\fR return 1 on success, 0 on error. +\&\fIDSA_verify()\fR returns 1 for a valid signature, 0 for an incorrect +signature and \-1 on error. The error codes can be obtained by +\&\fIERR_get_error\fR\|(3). +.SH "CONFORMING TO" +.IX Header "CONFORMING TO" +\&\s-1US\s0 Federal Information Processing Standard \s-1FIPS\s0 186 (Digital Signature +Standard, \s-1DSS\s0), \s-1ANSI\s0 X9.30 +.SH "SEE ALSO" +.IX Header "SEE ALSO" +\&\fIdsa\fR\|(3), \fIERR_get_error\fR\|(3), \fIrand\fR\|(3), +\&\fIDSA_do_sign\fR\|(3) +.SH "HISTORY" +.IX Header "HISTORY" +\&\fIDSA_sign()\fR and \fIDSA_verify()\fR are available in all versions of SSLeay. +\&\fIDSA_sign_setup()\fR was added in SSLeay 0.8. |
