5 SMIME_write_CMS - convert CMS structure to S/MIME format.
9 #include <openssl/cms.h>
11 int SMIME_write_CMS(BIO *out, CMS_ContentInfo *cms, BIO *data, int flags);
15 SMIME_write_CMS() adds the appropriate MIME headers to a CMS
16 structure to produce an S/MIME message.
18 B<out> is the BIO to write the data to. B<cms> is the appropriate
19 B<CMS_ContentInfo> structure. If streaming is enabled then the content must be
20 supplied in the B<data> argument. B<flags> is an optional set of flags.
24 The following flags can be passed in the B<flags> parameter.
26 If B<CMS_DETACHED> is set then cleartext signing will be used, this option only
27 makes sense for SignedData where B<CMS_DETACHED> is also set when CMS_sign() is
30 If the B<CMS_TEXT> flag is set MIME headers for type B<text/plain> are added to
31 the content, this only makes sense if B<CMS_DETACHED> is also set.
33 If the B<CMS_STREAM> flag is set streaming is performed. This flag should only
34 be set if B<CMS_STREAM> was also set in the previous call to a CMS_ContentInfo
37 If cleartext signing is being used and B<CMS_STREAM> not set then the data must
38 be read twice: once to compute the signature in CMS_sign() and once to output
41 If streaming is performed the content is output in BER format using indefinite
42 length constructed encoding except in the case of signed data with detached
43 content where the content is absent and DER format is used.
47 SMIME_write_CMS() always base64 encodes CMS structures, there should be an
48 option to disable this.
52 SMIME_write_CMS() returns 1 for success or 0 for failure.
56 L<ERR_get_error(3)|ERR_get_error(3)>, L<CMS_sign(3)|CMS_sign(3)>,
57 L<CMS_verify(3)|CMS_verify(3)>, L<CMS_encrypt(3)|CMS_encrypt(3)>
58 L<CMS_decrypt(3)|CMS_decrypt(3)>
62 SMIME_write_CMS() was added to OpenSSL 0.9.8