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.\" Automatically generated by Pod::Man v1.37, Pod::Parser v1.32 .\" .\" 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 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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Buffers are used for various purposes in the library, most notably memory BIOs. .PP \&\fIBUF_MEM_new()\fR allocates a new buffer of zero size. .PP \&\fIBUF_MEM_free()\fR frees up an already existing buffer. The data is zeroed before freeing up in case the buffer contains sensitive data. .PP \&\fIBUF_MEM_grow()\fR changes the size of an already existing buffer to \&\fBlen\fR. Any data already in the buffer is preserved if it increases in size. .PP \&\fIBUF_strdup()\fR, \fIBUF_strndup()\fR, \fIBUF_memdup()\fR, \fIBUF_strlcpy()\fR, \&\fIBUF_strlcat()\fR and BUF_strnlen are equivalents of the standard C library functions. The \fIdup()\fR functions use \fIOPENSSL_malloc()\fR underneath and so should be used in preference to the standard library for memory leak checking or replacing the \fImalloc()\fR function. .PP Memory allocated from these functions should be freed up using the \&\fIOPENSSL_free()\fR function. .PP BUF_strndup makes the explicit guarantee that it will never read past the first \fBsiz\fR bytes of \fBstr\fR. .SH "RETURN VALUES" .IX Header "RETURN VALUES" \&\fIBUF_MEM_new()\fR returns the buffer or \s-1NULL\s0 on error. .PP \&\fIBUF_MEM_free()\fR has no return value. .PP \&\fIBUF_MEM_grow()\fR returns zero on error or the new size (i.e. \fBlen\fR). .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fIbio\fR\|(3) .SH "HISTORY" .IX Header "HISTORY" \&\fIBUF_MEM_new()\fR, \fIBUF_MEM_free()\fR and \fIBUF_MEM_grow()\fR are available in all versions of SSLeay and OpenSSL. \fIBUF_strdup()\fR was added in SSLeay 0.8.