Android_verify/third_party/android-libs/share/man/man3/SMIME_write_ASN1.3ossl

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.\" ========================================================================
.\"
.IX Title "SMIME_WRITE_ASN1 3ossl"
.TH SMIME_WRITE_ASN1 3ossl "2024-09-03" "3.3.2" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.if n .ad l
.nh
.SH "NAME"
SMIME_write_ASN1_ex, SMIME_write_ASN1
\&\- convert structure to S/MIME format
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/asn1.h>
\&
\& int SMIME_write_ASN1_ex(BIO *out, ASN1_VALUE *val, BIO *data, int flags,
\&                         int ctype_nid, int econt_nid,
\&                         STACK_OF(X509_ALGOR) *mdalgs, const ASN1_ITEM *it,
\&                         OSSL_LIB_CTX *libctx, const char *propq);
\&
\& int SMIME_write_ASN1(BIO *out,
\&     ASN1_VALUE *val, BIO *data, int flags, int ctype_nid, int econt_nid,
\&     STACK_OF(X509_ALGOR) *mdalgs, const ASN1_ITEM *it);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBSMIME_write_ASN1_ex()\fR adds the appropriate \s-1MIME\s0 headers to an object
structure to produce an S/MIME message.
.PP
\&\fIout\fR is the \s-1BIO\s0 to write the data to. \fIvalue\fR is the appropriate \s-1ASN1_VALUE\s0
structure (either CMS_ContentInfo or \s-1PKCS7\s0). If streaming is enabled then the
content must be supplied via \fIdata\fR.
\&\fIflags\fR is an optional set of flags. \fIctype_nid\fR is the \s-1NID\s0 of the content
type, \fIecont_nid\fR is the \s-1NID\s0 of the embedded content type and \fImdalgs\fR is a
list of signed data digestAlgorithms. Valid values that can be used by the
\&\s-1ASN.1\s0 structure \fIit\fR are ASN1_ITEM_rptr(\s-1PKCS7\s0) or ASN1_ITEM_rptr(CMS_ContentInfo).
The library context \fIlibctx\fR and the property query \fIpropq\fR are used when
retrieving algorithms from providers.
.SH "NOTES"
.IX Header "NOTES"
The higher level functions \fBSMIME_write_CMS\fR\|(3) and
\&\fBSMIME_write_PKCS7\fR\|(3) should be used instead of \fBSMIME_write_ASN1()\fR.
.PP
The following flags can be passed in the \fBflags\fR parameter.
.PP
If \fB\s-1CMS_DETACHED\s0\fR is set then cleartext signing will be used, this option only
makes sense for SignedData where \fB\s-1CMS_DETACHED\s0\fR is also set when the \fBsign()\fR
method is called.
.PP
If the \fB\s-1CMS_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-1CMS_DETACHED\s0\fR is also set.
.PP
If the \fB\s-1CMS_STREAM\s0\fR flag is set streaming is performed. This flag should only
be set if \fB\s-1CMS_STREAM\s0\fR was also set in the previous call to a CMS_ContentInfo
or \s-1PKCS7\s0 creation function.
.PP
If cleartext signing is being used and \fB\s-1CMS_STREAM\s0\fR not set then the data must
be read twice: once to compute the signature in sign method 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 constructed encoding except in the case of signed data with detached
content where the content is absent and \s-1DER\s0 format is used.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBSMIME_write_ASN1_ex()\fR and \fBSMIME_write_ASN1()\fR return 1 for success or
0 for failure.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBERR_get_error\fR\|(3),
\&\fBSMIME_write_CMS\fR\|(3),
\&\fBSMIME_write_PKCS7\fR\|(3)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the Apache License 2.0 (the \*(L"License\*(R").  You may not use
this file except in compliance with the License.  You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.