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.\" Copyright (C) 2007 International Business Machines Corporation
.\" Written by Tom Lendacky based on the Trusted Computing Group Software Stack Specification Version 1.2
.\"
.de Sh \" Subsection
.br
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.ne 5
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\fB\\$1\fR
.PP
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.TH "Tspi_EncodeDER_TssBlob" 3 "2007-06-12" "TSS 1.2" "TCG Software Stack Developer's Reference"
.SH NAME
Tspi_EncodeDER_TssBlob \- generate a DER encoded TSS blob.
.SH "SYNOPSIS"
.ad l
.hy 0
.nf
.B #include <tss/tspi.h>
.sp
.BI "TSS_RESULT Tspi_EncodeDER_TssBlob(UINT32 " rawBlobSize ", BYTE* " rawBlob ","
.BI " UINT32 " blobType ", UINT32* " derBlobSize ","
.BI " BYTE* " derBlob ");"
.fi
.sp
.ad
.hy
.SH "DESCRIPTION"
.PP
\fBTspi_EncodeDER_TssBlob\fR is used to generate a DER-encoded blob in accordance with the ASN.1 data definitions in the Portable Data section of the Trusted Computing Group Software Stack Specification Version 1.2.
.SH "PARAMETERS"
.PP
.SS rawBlobSize
Size of the unwrapped blob.
.PP
.SS rawBlob
Pointer to the unwrapped blob.
.PP
.SS blobType
Type of blob being wrapped (refer to the TSS_BLOB_TYPE_* constants).
.PP
.SS derBlobSize
Pointer to the size of the derBlob buffer. On input this parameter contains a pointer to the maximum size of the supplied derBlob buffer. On output this parameter contains a pointer to the actual size of the DER-encoded blob. On input, if this parameter points to a value of 0, then this function will return the size of the buffer required to hold the DER-encoded blob without writing to the derBlob buffer.
.sp
\fBNote:\fR If the raw data blob length is less than 2^16 bytes then the DER-encoding may add no more than 20 bytes.
.PP
.SS derBlob
Pointer to a buffer to hold the DER-encoded blob.
.SH "RETURN CODES"
.PP
\fBTspi_EncodeDER_TssBlob\fR returns TSS_SUCCESS on success, otherwise one of the following values are returned:
.TP
.SM TSS_E_BAD_PARAMETER
.TP
.SM TSS_E_INTERNAL_ERROR - An error occurred internal to the TSS.
.SH "CONFORMING TO"
.PP
\fBTspi_EncodeDER_TssBlob\fR conforms to the Trusted Computing Group Software Specification Version 1.2
.SH "SEE ALSO"
.PP
\fBTspi_DecodeBER_TssBlob\fR(3).
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