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EDIT :: SMIME_write_PKCS7.3

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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" SMIME_write_PKCS7 \- convert PKCS#7 structure to S/MIME format. .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include <openssl/pkcs7.h> \& \& int SMIME_write_PKCS7(BIO *out, PKCS7 *p7, BIO *data, int flags); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" \&\fBSMIME_write_PKCS7()\fR adds the appropriate \s-1MIME\s0 headers to a PKCS#7 structure to produce an S/MIME message. .PP \&\fBout\fR is the \s-1BIO\s0 to write the data to. \fBp7\fR is the appropriate \fB\s-1PKCS7\s0\fR structure. If streaming is enabled then the content must be supplied in the \&\fBdata\fR argument. \fBflags\fR is an optional set of flags. .SH "NOTES" .IX Header "NOTES" The following flags can be passed in the \fBflags\fR parameter. .PP If \fB\s-1PKCS7_DETACHED\s0\fR is set then cleartext signing will be used, this option only makes sense for signedData where \fB\s-1PKCS7_DETACHED\s0\fR is also set when \fBPKCS7_sign()\fR is also called. .PP If the \fB\s-1PKCS7_TEXT\s0\fR flag is set \s-1MIME\s0 headers for type \fBtext/plain\fR are added to the content, this only makes sense if \fB\s-1PKCS7_DETACHED\s0\fR is also set. .PP If the \fB\s-1PKCS7_STREAM\s0\fR flag is set streaming is performed. This flag should only be set if \fB\s-1PKCS7_STREAM\s0\fR was also set in the previous call to \&\fBPKCS7_sign()\fR or \fB\fBPKCS7_encrypt()\fB\fR. .PP If cleartext signing is being used and \fB\s-1PKCS7_STREAM\s0\fR not set then the data must be read twice: once to compute the signature in \fBPKCS7_sign()\fR and once to output the S/MIME message. .PP If streaming is performed the content is output in \s-1BER\s0 format using indefinite length constructuted encoding except in the case of signed data with detached content where the content is absent and \s-1DER\s0 format is used. .SH "BUGS" .IX Header "BUGS" \&\fBSMIME_write_PKCS7()\fR always base64 encodes PKCS#7 structures, there should be an option to disable this. .SH "RETURN VALUES" .IX Header "RETURN VALUES" \&\fBSMIME_write_PKCS7()\fR returns 1 for success or 0 for failure. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBERR_get_error\fR\|(3), \fBPKCS7_sign\fR\|(3), \&\fBPKCS7_verify\fR\|(3), \fBPKCS7_encrypt\fR\|(3) \&\fBPKCS7_decrypt\fR\|(3) .SH "HISTORY" .IX Header "HISTORY" \&\fBSMIME_write_PKCS7()\fR was added to OpenSSL 0.9.5

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