diff options
Diffstat (limited to 'secure/lib/libcrypto/man/man3/ECDSA_sign.3')
| -rw-r--r-- | secure/lib/libcrypto/man/man3/ECDSA_sign.3 | 327 |
1 files changed, 327 insertions, 0 deletions
diff --git a/secure/lib/libcrypto/man/man3/ECDSA_sign.3 b/secure/lib/libcrypto/man/man3/ECDSA_sign.3 new file mode 100644 index 000000000000..08e466880236 --- /dev/null +++ b/secure/lib/libcrypto/man/man3/ECDSA_sign.3 @@ -0,0 +1,327 @@ +.\" Automatically generated by Pod::Man 4.14 (Pod::Simple 3.42) +.\" +.\" 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 +.\" Fear. Run. Save yourself. No user-serviceable parts. +. \" fudge factors for nroff and troff +.if n \{\ +. ds #H 0 +. ds #V .8m +. ds #F .3m +. ds #[ \f1 +. ds #] \fP +.\} +.if t \{\ +. ds #H ((1u-(\\\\n(.fu%2u))*.13m) +. ds #V .6m +. ds #F 0 +. ds #[ \& +. ds #] \& +.\} +. \" simple accents for nroff and troff +.if n \{\ +. ds ' \& +. ds ` \& +. ds ^ \& +. ds , \& +. ds ~ ~ +. ds / +.\} +.if t \{\ +. ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u" +. ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u' +. ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u' +. ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u' +. ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u' +. ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u' +.\} +. \" troff and (daisy-wheel) nroff accents +.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V' +.ds 8 \h'\*(#H'\(*b\h'-\*(#H' +.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#] +.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H' +.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u' +.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#] +.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#] +.ds ae a\h'-(\w'a'u*4/10)'e +.ds Ae A\h'-(\w'A'u*4/10)'E +. \" corrections for vroff +.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u' +.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u' +. \" for low resolution devices (crt and lpr) +.if \n(.H>23 .if \n(.V>19 \ +\{\ +. ds : e +. ds 8 ss +. ds o a +. ds d- d\h'-1'\(ga +. ds D- D\h'-1'\(hy +. ds th \o'bp' +. ds Th \o'LP' +. ds ae ae +. ds Ae AE +.\} +.rm #[ #] #H #V #F C +.\" ======================================================================== +.\" +.IX Title "ECDSA_SIGN 3ossl" +.TH ECDSA_SIGN 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" +ECDSA_size, ECDSA_sign, ECDSA_do_sign, +ECDSA_verify, ECDSA_do_verify, ECDSA_sign_setup, ECDSA_sign_ex, +ECDSA_do_sign_ex \- deprecated low\-level elliptic curve digital signature algorithm +(ECDSA) functions +.SH "SYNOPSIS" +.IX Header "SYNOPSIS" +.Vb 1 +\& #include <openssl/ecdsa.h> +.Ve +.PP +The following functions have been deprecated since OpenSSL 3.0, and can be +hidden entirely by defining \fB\s-1OPENSSL_API_COMPAT\s0\fR with a suitable version value, +see \fBopenssl_user_macros\fR\|(7): +.PP +.Vb 1 +\& int ECDSA_size(const EC_KEY *eckey); +\& +\& int ECDSA_sign(int type, const unsigned char *dgst, int dgstlen, +\& unsigned char *sig, unsigned int *siglen, EC_KEY *eckey); +\& ECDSA_SIG *ECDSA_do_sign(const unsigned char *dgst, int dgst_len, +\& EC_KEY *eckey); +\& +\& int ECDSA_verify(int type, const unsigned char *dgst, int dgstlen, +\& const unsigned char *sig, int siglen, EC_KEY *eckey); +\& int ECDSA_do_verify(const unsigned char *dgst, int dgst_len, +\& const ECDSA_SIG *sig, EC_KEY* eckey); +\& +\& ECDSA_SIG *ECDSA_do_sign_ex(const unsigned char *dgst, int dgstlen, +\& const BIGNUM *kinv, const BIGNUM *rp, +\& EC_KEY *eckey); +\& int ECDSA_sign_setup(EC_KEY *eckey, BN_CTX *ctx, BIGNUM **kinv, BIGNUM **rp); +\& int ECDSA_sign_ex(int type, const unsigned char *dgst, int dgstlen, +\& unsigned char *sig, unsigned int *siglen, +\& const BIGNUM *kinv, const BIGNUM *rp, EC_KEY *eckey); +.Ve +.SH "DESCRIPTION" +.IX Header "DESCRIPTION" +See \fBECDSA_SIG_new\fR\|(3) for a description of the \fB\s-1ECDSA_SIG\s0\fR object. +.PP +See \fBi2d_ECDSA_SIG\fR\|(3) and \fBd2i_ECDSA_SIG\fR\|(3) for information about encoding +and decoding \s-1ECDSA\s0 signatures to/from \s-1DER.\s0 +.PP +All of the functions described below are deprecated. Applications should +use the higher level \fB\s-1EVP\s0\fR interface such as \fBEVP_DigestSignInit\fR\|(3) +or \fBEVP_DigestVerifyInit\fR\|(3) instead. +.PP +\&\fBECDSA_size()\fR returns the maximum length of a \s-1DER\s0 encoded \s-1ECDSA\s0 signature +created with the private \s-1EC\s0 key \fIeckey\fR. To obtain the actual signature +size use \fBEVP_PKEY_sign\fR\|(3) with a \s-1NULL\s0 \fIsig\fR parameter. +.PP +\&\fBECDSA_sign()\fR computes a digital signature of the \fIdgstlen\fR bytes hash value +\&\fIdgst\fR using the private \s-1EC\s0 key \fIeckey\fR. The \s-1DER\s0 encoded signatures is +stored in \fIsig\fR and its length is returned in \fIsig_len\fR. Note: \fIsig\fR must +point to ECDSA_size(eckey) bytes of memory. The parameter \fItype\fR is currently +ignored. \fBECDSA_sign()\fR is wrapper function for \fBECDSA_sign_ex()\fR with \fIkinv\fR +and \fIrp\fR set to \s-1NULL.\s0 +.PP +\&\fBECDSA_do_sign()\fR is similar to \fBECDSA_sign()\fR except the signature is returned +as a newly allocated \fB\s-1ECDSA_SIG\s0\fR structure (or \s-1NULL\s0 on error). \fBECDSA_do_sign()\fR +is a wrapper function for \fBECDSA_do_sign_ex()\fR with \fIkinv\fR and \fIrp\fR set to +\&\s-1NULL.\s0 +.PP +\&\fBECDSA_verify()\fR verifies that the signature in \fIsig\fR of size \fIsiglen\fR is a +valid \s-1ECDSA\s0 signature of the hash value \fIdgst\fR of size \fIdgstlen\fR using the +public key \fIeckey\fR. The parameter \fItype\fR is ignored. +.PP +\&\fBECDSA_do_verify()\fR is similar to \fBECDSA_verify()\fR except the signature is +presented in the form of a pointer to an \fB\s-1ECDSA_SIG\s0\fR structure. +.PP +The remaining functions utilise the internal \fIkinv\fR and \fIr\fR values used +during signature computation. Most applications will never need to call these +and some external \s-1ECDSA ENGINE\s0 implementations may not support them at all if +either \fIkinv\fR or \fIr\fR is not \s-1NULL.\s0 +.PP +\&\fBECDSA_sign_setup()\fR may be used to precompute parts of the signing operation. +\&\fIeckey\fR is the private \s-1EC\s0 key and \fIctx\fR is a pointer to \fB\s-1BN_CTX\s0\fR structure +(or \s-1NULL\s0). The precomputed values or returned in \fIkinv\fR and \fIrp\fR and can be +used in a later call to \fBECDSA_sign_ex()\fR or \fBECDSA_do_sign_ex()\fR. +.PP +\&\fBECDSA_sign_ex()\fR computes a digital signature of the \fIdgstlen\fR bytes hash value +\&\fIdgst\fR using the private \s-1EC\s0 key \fIeckey\fR and the optional pre-computed values +\&\fIkinv\fR and \fIrp\fR. The \s-1DER\s0 encoded signature is stored in \fIsig\fR and its +length is returned in \fIsig_len\fR. Note: \fIsig\fR must point to ECDSA_size(eckey) +bytes of memory. The parameter \fItype\fR is ignored. +.PP +\&\fBECDSA_do_sign_ex()\fR is similar to \fBECDSA_sign_ex()\fR except the signature is +returned as a newly allocated \fB\s-1ECDSA_SIG\s0\fR structure (or \s-1NULL\s0 on error). +.SH "RETURN VALUES" +.IX Header "RETURN VALUES" +\&\fBECDSA_size()\fR returns the maximum length signature or 0 on error. +.PP +\&\fBECDSA_sign()\fR, \fBECDSA_sign_ex()\fR and \fBECDSA_sign_setup()\fR return 1 if successful +or 0 on error. +.PP +\&\fBECDSA_do_sign()\fR and \fBECDSA_do_sign_ex()\fR return a pointer to an allocated +\&\fB\s-1ECDSA_SIG\s0\fR structure or \s-1NULL\s0 on error. +.PP +\&\fBECDSA_verify()\fR and \fBECDSA_do_verify()\fR return 1 for a valid +signature, 0 for an invalid signature and \-1 on error. +The error codes can be obtained by \fBERR_get_error\fR\|(3). +.SH "EXAMPLES" +.IX Header "EXAMPLES" +Creating an \s-1ECDSA\s0 signature of a given \s-1SHA\-256\s0 hash value using the +named curve prime256v1 (aka P\-256). +This example uses deprecated functionality. See \*(L"\s-1DESCRIPTION\*(R"\s0. +.PP +First step: create an \s-1EC_KEY\s0 object (note: this part is \fBnot\fR \s-1ECDSA\s0 +specific) +.PP +.Vb 3 +\& int ret; +\& ECDSA_SIG *sig; +\& EC_KEY *eckey; +\& +\& eckey = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1); +\& if (eckey == NULL) +\& /* error */ +\& if (EC_KEY_generate_key(eckey) == 0) +\& /* error */ +.Ve +.PP +Second step: compute the \s-1ECDSA\s0 signature of a \s-1SHA\-256\s0 hash value +using \fBECDSA_do_sign()\fR: +.PP +.Vb 3 +\& sig = ECDSA_do_sign(digest, 32, eckey); +\& if (sig == NULL) +\& /* error */ +.Ve +.PP +or using \fBECDSA_sign()\fR: +.PP +.Vb 2 +\& unsigned char *buffer, *pp; +\& int buf_len; +\& +\& buf_len = ECDSA_size(eckey); +\& buffer = OPENSSL_malloc(buf_len); +\& pp = buffer; +\& if (ECDSA_sign(0, dgst, dgstlen, pp, &buf_len, eckey) == 0) +\& /* error */ +.Ve +.PP +Third step: verify the created \s-1ECDSA\s0 signature using \fBECDSA_do_verify()\fR: +.PP +.Vb 1 +\& ret = ECDSA_do_verify(digest, 32, sig, eckey); +.Ve +.PP +or using \fBECDSA_verify()\fR: +.PP +.Vb 1 +\& ret = ECDSA_verify(0, digest, 32, buffer, buf_len, eckey); +.Ve +.PP +and finally evaluate the return value: +.PP +.Vb 6 +\& if (ret == 1) +\& /* signature ok */ +\& else if (ret == 0) +\& /* incorrect signature */ +\& else +\& /* error */ +.Ve +.SH "CONFORMING TO" +.IX Header "CONFORMING TO" +\&\s-1ANSI X9.62, US\s0 Federal Information Processing Standard \s-1FIPS186\-2\s0 +(Digital Signature Standard, \s-1DSS\s0) +.SH "SEE ALSO" +.IX Header "SEE ALSO" +\&\fBEC_KEY_new\fR\|(3), +\&\fBEVP_DigestSignInit\fR\|(3), +\&\fBEVP_DigestVerifyInit\fR\|(3), +\&\fBEVP_PKEY_sign\fR\|(3) +\&\fBi2d_ECDSA_SIG\fR\|(3), +\&\fBd2i_ECDSA_SIG\fR\|(3) +.SH "HISTORY" +.IX Header "HISTORY" +All functionality described here was deprecated in OpenSSL 3.0. +.SH "COPYRIGHT" +.IX Header "COPYRIGHT" +Copyright 2004\-2022 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>. |