Sortix nightly manual
This manual documents Sortix nightly, a development build that has not been officially released. You can instead view this document in the latest official manual.
|SMIME_WRITE_PKCS7(3)||Library Functions Manual||SMIME_WRITE_PKCS7(3)|
convert PKCS#7 structure to S/MIME format
SMIME_write_PKCS7(BIO *out, PKCS7 *p7, BIO *data, int flags);
SMIME_write_PKCS7() adds the appropriate MIME headers to a PKCS#7 structure to produce an S/MIME message. out is the BIO to write the data to. p7 is the appropriate PKCS7 structure. If streaming is enabled, then the content must be supplied in the data argument. flags is an optional set of flags. The following flags can be passed in the flags parameter. If
PKCS7_DETACHEDis set, then cleartext signing will be used. This option only makes sense for signedData where
PKCS7_DETACHEDis also set when PKCS7_sign(3) is also called. If the
PKCS7_TEXTflag is set, MIME headers for type text/plain are added to the content. This only makes sense if
PKCS7_DETACHEDis also set. If the
PKCS7_STREAMflag is set, streaming is performed. This flag should only be set if
PKCS7_STREAMwas also set in the previous call to PKCS7_sign(3) or PKCS7_encrypt(3). The bit
SMIME_OLDMIMEis inverted before passing on the flags to SMIME_write_ASN1(3). Consequently, if this bit is set in the flags argument, “application/pkcs7-mime” or “application/pkcs7-signature” is used in Content-Type headers. Otherwise, “application/x-pkcs7-mime” or “application/x-pkcs7-signature” is used. If cleartext signing is being used and
PKCS7_STREAMis not set, then the data must be read twice: once to compute the signature in PKCS7_sign(3) and once to output the S/MIME message. If streaming is performed, the content is output in BER format using indefinite length constructed encoding except in the case of signed data with detached content where the content is absent and DER format is used. ERR_get_error(3). i2d_PKCS7_bio_stream(3), PEM_write_bio_PKCS7_stream(3), PEM_write_PKCS7(3), PKCS7_final(3), PKCS7_new(3), SMIME_read_PKCS7(3), SMIME_write_ASN1(3)
SMIME_write_PKCS7() first appeared in OpenSSL 0.9.5 and has been available since OpenBSD 2.7.
SMIME_write_PKCS7() always base64 encodes PKCS#7 structures. There should be an option to disable this.
|December 14, 2021||Debian|