f4401cd869
alter des.h to be friendly with openssl/des.h (you can include both in the same file) make libkrb to depend on libdes. bump major. massage various portioin of heimdal to be friendly with openssl 0.9.7b.
206 lines
6.7 KiB
Groff
206 lines
6.7 KiB
Groff
.\" $NetBSD: d2i_SSL_SESSION.3,v 1.8 2003/07/24 14:16:48 itojun Exp $
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.\" ======================================================================
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.\"
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.IX Title "d2i_SSL_SESSION 3"
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.TH d2i_SSL_SESSION 3 "0.9.7b" "2001-10-12" "OpenSSL"
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.UC
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.SH "NAME"
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d2i_SSL_SESSION, i2d_SSL_SESSION \- convert \s-1SSL_SESSION\s0 object from/to \s-1ASN1\s0 representation
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.SH "LIBRARY"
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libcrypto, -lcrypto
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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.Vb 1
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\& #include <openssl/ssl.h>
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.Ve
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.Vb 2
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\& SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, unsigned char **pp, long length);
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\& int i2d_SSL_SESSION(SSL_SESSION *in, unsigned char **pp);
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.Ve
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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\&\fId2i_SSL_SESSION()\fR transforms the external \s-1ASN1\s0 representation of an \s-1SSL/TLS\s0
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session, stored as binary data at location \fBpp\fR with length \fBlength\fR, into
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an \s-1SSL_SESSION\s0 object.
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.PP
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\&\fIi2d_SSL_SESSION()\fR transforms the \s-1SSL_SESSION\s0 object \fBin\fR into the \s-1ASN1\s0
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representation and stores it into the memory location pointed to by \fBpp\fR.
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The length of the resulting \s-1ASN1\s0 representation is returned. If \fBpp\fR is
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the \s-1NULL\s0 pointer, only the length is calculated and returned.
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.SH "NOTES"
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.IX Header "NOTES"
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The \s-1SSL_SESSION\s0 object is built from several \fImalloc()\fRed parts, it can
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therefore not be moved, copied or stored directly. In order to store
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session data on disk or into a database, it must be transformed into
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a binary \s-1ASN1\s0 representation.
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.PP
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When using \fId2i_SSL_SESSION()\fR, the \s-1SSL_SESSION\s0 object is automatically
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allocated. The reference count is 1, so that the session must be
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explicitly removed using SSL_SESSION_free(3),
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unless the \s-1SSL_SESSION\s0 object is completely taken over, when being called
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inside the \fIget_session_cb()\fR (see
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SSL_CTX_sess_set_get_cb(3)).
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.PP
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\&\s-1SSL_SESSION\s0 objects keep internal link information about the session cache
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list, when being inserted into one \s-1SSL_CTX\s0 object's session cache.
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One \s-1SSL_SESSION\s0 object, regardless of its reference count, must therefore
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only be used with one \s-1SSL_CTX\s0 object (and the \s-1SSL\s0 objects created
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from this \s-1SSL_CTX\s0 object).
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.PP
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When using \fIi2d_SSL_SESSION()\fR, the memory location pointed to by \fBpp\fR must be
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large enough to hold the binary representation of the session. There is no
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known limit on the size of the created \s-1ASN1\s0 representation, so the necessary
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amount of space should be obtained by first calling \fIi2d_SSL_SESSION()\fR with
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\&\fBpp=NULL\fR, and obtain the size needed, then allocate the memory and
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call \fIi2d_SSL_SESSION()\fR again.
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.SH "RETURN VALUES"
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.IX Header "RETURN VALUES"
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\&\fId2i_SSL_SESSION()\fR returns a pointer to the newly allocated \s-1SSL_SESSION\s0
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object. In case of failure the NULL-pointer is returned and the error message
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can be retrieved from the error stack.
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.PP
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\&\fIi2d_SSL_SESSION()\fR returns the size of the \s-1ASN1\s0 representation in bytes.
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When the session is not valid, \fB0\fR is returned and no operation is performed.
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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ssl(3), SSL_SESSION_free(3),
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SSL_CTX_sess_set_get_cb(3)
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