2002-10-09 12:06:12 +00:00
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=pod
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=head1 NAME
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SMIME_write_PKCS7 - convert PKCS#7 structure to S/MIME format.
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=head1 SYNOPSIS
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2006-05-14 11:28:00 +00:00
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#include <openssl/pkcs7.h>
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int SMIME_write_PKCS7(BIO *out, PKCS7 *p7, BIO *data, int flags);
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2002-10-09 12:06:12 +00:00
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=head1 DESCRIPTION
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SMIME_write_PKCS7() adds the appropriate MIME headers to a PKCS#7
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structure to produce an S/MIME message.
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2007-04-13 13:13:14 +00:00
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B<out> is the BIO to write the data to. B<p7> is the appropriate B<PKCS7>
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structure. If streaming is enabled then the content must be supplied in the
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B<data> argument. B<flags> is an optional set of flags.
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2002-10-09 12:06:12 +00:00
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=head1 NOTES
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The following flags can be passed in the B<flags> parameter.
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If B<PKCS7_DETACHED> is set then cleartext signing will be used,
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this option only makes sense for signedData where B<PKCS7_DETACHED>
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is also set when PKCS7_sign() is also called.
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If the B<PKCS7_TEXT> flag is set MIME headers for type B<text/plain>
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are added to the content, this only makes sense if B<PKCS7_DETACHED>
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is also set.
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2007-04-13 13:13:14 +00:00
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If the B<PKCS7_STREAM> flag is set streaming is performed. This flag should
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only be set if B<PKCS7_STREAM> was also set in the previous call to
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PKCS7_sign() or B<PKCS7_encrypt()>.
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2003-02-15 01:09:55 +00:00
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2007-04-13 13:13:14 +00:00
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If cleartext signing is being used and B<PKCS7_STREAM> not set then
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2003-02-15 01:09:55 +00:00
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the data must be read twice: once to compute the signature in PKCS7_sign()
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and once to output the S/MIME message.
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2002-10-09 12:06:12 +00:00
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2007-04-13 13:13:14 +00:00
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If streaming is performed the content is output in BER format using indefinite
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length constructuted encoding except in the case of signed data with detached
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content where the content is absent and DER format is used.
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2002-10-09 12:06:12 +00:00
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=head1 BUGS
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SMIME_write_PKCS7() always base64 encodes PKCS#7 structures, there
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should be an option to disable this.
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=head1 RETURN VALUES
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SMIME_write_PKCS7() returns 1 for success or 0 for failure.
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=head1 SEE ALSO
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L<ERR_get_error(3)|ERR_get_error(3)>, L<PKCS7_sign(3)|PKCS7_sign(3)>,
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L<PKCS7_verify(3)|PKCS7_verify(3)>, L<PKCS7_encrypt(3)|PKCS7_encrypt(3)>
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L<PKCS7_decrypt(3)|PKCS7_decrypt(3)>
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=head1 HISTORY
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SMIME_write_PKCS7() was added to OpenSSL 0.9.5
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=cut
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