From aeefd5b3e2766cf2adf46ab0d391c6290c566150 Mon Sep 17 00:00:00 2001 From: markm Date: Tue, 14 May 2002 16:06:50 +0000 Subject: As the perl-generated assembler files have been committed, add the perl-generated (.pod) manual pages too. This is another nail in the perl5 coffin (for base perl, not the port or the language in general). --- secure/lib/libcrypto/man/BIO_f_md.3 | 278 ++++++++++++++++++++++++++++++++++++ 1 file changed, 278 insertions(+) create mode 100644 secure/lib/libcrypto/man/BIO_f_md.3 (limited to 'secure/lib/libcrypto/man/BIO_f_md.3') diff --git a/secure/lib/libcrypto/man/BIO_f_md.3 b/secure/lib/libcrypto/man/BIO_f_md.3 new file mode 100644 index 0000000..af0f168 --- /dev/null +++ b/secure/lib/libcrypto/man/BIO_f_md.3 @@ -0,0 +1,278 @@ +.\" Automatically generated by Pod::Man version 1.15 +.\" Thu May 9 13:15:32 2002 +.\" +.\" Standard preamble: +.\" ====================================================================== +.de Sh \" Subsection heading +.br +.if t .Sp +.ne 5 +.PP +\fB\\$1\fR +.PP +.. +.de Sp \" Vertical space (when we can't use .PP) +.if t .sp .5v +.if n .sp +.. +.de Ip \" List item +.br +.ie \\n(.$>=3 .ne \\$3 +.el .ne 3 +.IP "\\$1" \\$2 +.. +.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. | will give a +.\" real vertical bar. \*(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-|\(bv\*(Tr +.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" '' +'br\} +.\" +.\" If the F register is turned on, we'll generate index entries on stderr +.\" for titles (.TH), headers (.SH), subsections (.Sh), items (.Ip), and +.\" index entries marked with X<> in POD. Of course, you'll have to process +.\" the output yourself in some meaningful fashion. +.if \nF \{\ +. de IX +. tm Index:\\$1\t\\n%\t"\\$2" +.. +. nr % 0 +. rr F +.\} +.\" +.\" For nroff, turn off justification. 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This is a filter +\&\s-1BIO\s0 that digests any data passed through it, it is a \s-1BIO\s0 wrapper +for the digest routines \fIEVP_DigestInit()\fR, \fIEVP_DigestUpdate()\fR +and \fIEVP_DigestFinal()\fR. +.PP +Any data written or read through a digest \s-1BIO\s0 using \fIBIO_read()\fR and +\&\fIBIO_write()\fR is digested. +.PP +\&\fIBIO_gets()\fR, if its \fBsize\fR parameter is large enough finishes the +digest calculation and returns the digest value. \fIBIO_puts()\fR is +not supported. +.PP +\&\fIBIO_reset()\fR reinitializes a digest \s-1BIO\s0. +.PP +\&\fIBIO_set_md()\fR sets the message digest of \s-1BIO\s0 \fBb\fR to \fBmd\fR: this +must be called to initialize a digest \s-1BIO\s0 before any data is +passed through it. It is a \fIBIO_ctrl()\fR macro. +.PP +\&\fIBIO_get_md()\fR places the a pointer to the digest BIOs digest method +in \fBmdp\fR, it is a \fIBIO_ctrl()\fR macro. +.PP +\&\fIBIO_get_md_ctx()\fR returns the digest BIOs context into \fBmdcp\fR. +.SH "NOTES" +.IX Header "NOTES" +The context returned by \fIBIO_get_md_ctx()\fR can be used in calls +to \fIEVP_DigestFinal()\fR and also the signature routines \fIEVP_SignFinal()\fR +and \fIEVP_VerifyFinal()\fR. +.PP +The context returned by \fIBIO_get_md_ctx()\fR is an internal context +structure. Changes made to this context will affect the digest +\&\s-1BIO\s0 itself and the context pointer will become invalid when the digest +\&\s-1BIO\s0 is freed. +.PP +After the digest has been retrieved from a digest \s-1BIO\s0 it must be +reinitialized by calling \fIBIO_reset()\fR, or \fIBIO_set_md()\fR before any more +data is passed through it. +.PP +If an application needs to call \fIBIO_gets()\fR or \fIBIO_puts()\fR through +a chain containing digest BIOs then this can be done by prepending +a buffering \s-1BIO\s0. +.SH "RETURN VALUES" +.IX Header "RETURN VALUES" +\&\fIBIO_f_md()\fR returns the digest \s-1BIO\s0 method. +.PP +\&\fIBIO_set_md()\fR, \fIBIO_get_md()\fR and \fIBIO_md_ctx()\fR return 1 for success and +0 for failure. +.SH "EXAMPLES" +.IX Header "EXAMPLES" +The following example creates a \s-1BIO\s0 chain containing an \s-1SHA1\s0 and \s-1MD5\s0 +digest \s-1BIO\s0 and passes the string \*(L"Hello World\*(R" through it. Error +checking has been omitted for clarity. +.PP +.Vb 14 +\& BIO *bio, *mdtmp; +\& char message[] = "Hello World"; +\& bio = BIO_new(BIO_s_null()); +\& mdtmp = BIO_new(BIO_f_md()); +\& BIO_set_md(mdtmp, EVP_sha1()); +\& /* For BIO_push() we want to append the sink BIO and keep a note of +\& * the start of the chain. +\& */ +\& bio = BIO_push(mdtmp, bio); +\& mdtmp = BIO_new(BIO_f_md()); +\& BIO_set_md(mdtmp, EVP_md5()); +\& bio = BIO_push(mdtmp, bio); +\& /* Note: mdtmp can now be discarded */ +\& BIO_write(bio, message, strlen(message)); +.Ve +The next example digests data by reading through a chain instead: +.PP +.Vb 14 +\& BIO *bio, *mdtmp; +\& char buf[1024]; +\& int rdlen; +\& bio = BIO_new_file(file, "rb"); +\& mdtmp = BIO_new(BIO_f_md()); +\& BIO_set_md(mdtmp, EVP_sha1()); +\& bio = BIO_push(mdtmp, bio); +\& mdtmp = BIO_new(BIO_f_md()); +\& BIO_set_md(mdtmp, EVP_md5()); +\& bio = BIO_push(mdtmp, bio); +\& do { +\& rdlen = BIO_read(bio, buf, sizeof(buf)); +\& /* Might want to do something with the data here */ +\& } while(rdlen > 0); +.Ve +This next example retrieves the message digests from a \s-1BIO\s0 chain and +outputs them. This could be used with the examples above. +.PP +.Vb 16 +\& BIO *mdtmp; +\& unsigned char mdbuf[EVP_MAX_MD_SIZE]; +\& int mdlen; +\& int i; +\& mdtmp = bio; /* Assume bio has previously been set up */ +\& do { +\& EVP_MD *md; +\& mdtmp = BIO_find_type(mdtmp, BIO_TYPE_MD); +\& if(!mdtmp) break; +\& BIO_get_md(mdtmp, &md); +\& printf("%s digest", OBJ_nid2sn(EVP_MD_type(md))); +\& mdlen = BIO_gets(mdtmp, mdbuf, EVP_MAX_MD_SIZE); +\& for(i = 0; i < mdlen; i++) printf(":%02X", mdbuf[i]); +\& printf("\en"); +\& mdtmp = BIO_next(mdtmp); +\& } while(mdtmp); +.Ve +.Vb 1 +\& BIO_free_all(bio); +.Ve +.SH "BUGS" +.IX Header "BUGS" +The lack of support for \fIBIO_puts()\fR and the non standard behaviour of +\&\fIBIO_gets()\fR could be regarded as anomalous. It could be argued that \fIBIO_gets()\fR +and \fIBIO_puts()\fR should be passed to the next \s-1BIO\s0 in the chain and digest +the data passed through and that digests should be retrieved using a +separate \fIBIO_ctrl()\fR call. +.SH "SEE ALSO" +.IX Header "SEE ALSO" +\&\s-1TBA\s0 -- cgit v1.1