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89 lines
1.8 KiB
89 lines
1.8 KiB
//=============================================================================
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//
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// MODULE: ASN1OctetString.cxx
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//
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// Description:
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//
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// Implementation of ASN.1 octet string parsing logic
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//
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// Modification History
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//
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// Mark Pustilnik Date: 06/09/02 - created
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//
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//=============================================================================
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#include "ASN1Parser.hxx"
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//
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// Retrieve the value of an ASN.1-encoded octet string
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//
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DWORD
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ASN1ParserOctetString::GetValue(
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IN OUT ASN1FRAME * Frame,
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OUT ASN1VALUE * Value
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)
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{
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DWORD dw;
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ASN1FRAME FrameIn = *Frame;
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DWORD DLength = DataLength( Frame );
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ULPBYTE Address = Frame->Address;
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if ( *Frame->Address != BuildDescriptor(
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ctUniversal,
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pcPrimitive,
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(BYTE)utOctetString ))
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{
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dw = ERROR_INVALID_USER_BUFFER;
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goto Cleanup;
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}
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//
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// Skip over the the descriptor
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//
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Address++;
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//
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// Skip over the length header
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//
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Address += HeaderLength( Address );
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Value->Address = Address;
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Value->Length = DLength;
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Value->ut = utOctetString;
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Value->string.s = Address;
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Value->string.l = DLength;
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//
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// Move the frame beyond the octet string
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//
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Address += DLength;
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Frame->Address = Address;
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//
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// Octet strings can be encoded other things, in highly situation-specific
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// context.
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//
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// Here we call into our derived class to get the value we just parsed out
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// interpreted as appropriate.
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//
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dw = ParseBlob( Value );
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if ( dw != ERROR_SUCCESS )
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{
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goto Cleanup;
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}
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Cleanup:
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if ( dw != ERROR_SUCCESS )
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{
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*Frame = FrameIn;
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}
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return dw;
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}
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