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Description Restrictions See Also | Notes Return Values History |
Synopsis int SMIME_write_PKCS7(BIO *out, PKCS7 *p7,
BIO *data, int flags);
out is the BIO to write the data to. p7 is the appropriate PKCS7 structure. If cleartext signing (multipart/signed) is being used then the signed data must be supplied in the data argument. flags is an optional set of flags.
If PKCS7_DETACHED is set then cleartext signing will be used, this option only makes sense for signedData where PKCS7_DETACHED is also set when PKCS7_sign() is also called.
If the PKCS7_TEXT flag is set MIME headers for type text/plain are added to the content, this only makes sense if PKCS7_DETACHED is also set.
If cleartext signing is being used then the data must be read twice: once to compute the signature in PKCS7_sign() and once to output the S/MIME message.
There should really be a way to produce cleartext signing using only a single pass of the data.
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