ospasn1object.c

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/*
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*########################################################################
*########################################################################
*                                                               
*   COPYRIGHT (c) 1998, 1999 by TransNexus, LLC                          
*                                                                    
*   This software contains proprietary and confidential information  
*   of TransNexus, LLC. Except as may be set forth in the license    
*   agreement under which this software is supplied, use, disclosure, 
*   or reproduction is prohibited without the prior, express, written
*   consent of TransNexus, LLC.                                      
*                                     
*
*
*
*
*
*
*#########################################################################
*#########################################################################
*#########################################################################
*/

/*
 * ospasn1object.c  Functions to implement PKCS7 ASN1 Objects 
 */

#include "osp.h"
#include "ospasn1.h"

#define OSPC_ERR_PKCS7                              (25500)
#define OSPC_ERR_PKCS7_MALLOC_FAILED    (OSPC_ERR_PKCS7 + 1000)

#define OSPC_SIGNEDDATA_VERSION 1

/* FUNCTION PROTOTYPES */

/* ---------------------------------------------------------*/
/* Member functions                                         */
/* ---------------------------------------------------------*/


int
OSPPASN1ObjectGetElementInfo(
    OSPTASN1OBJECT *ospvObject,
    OSPTASN1ELEMENTINFO **ospvElementInfo)
{
    int errorcode = OSPC_ERR_NO_ERROR;

    if (ospvObject == OSPC_OSNULL)
    {
        errorcode = OSPC_ERR_ASN1_NULL_POINTER;
        OSPM_DBGERRORLOG(errorcode, "Invalid pointer to Object");
    }

    if (errorcode == OSPC_ERR_NO_ERROR)
    {
        *ospvElementInfo = ospvObject->ElementInfo;
    }

    return errorcode;
}



int
OSPPASN1ObjectGetParseResults(
    OSPTASN1OBJECT *ospvObject,
    OSPTASN1PARSERESULT **ospvParseResults)
{
    int errorcode = OSPC_ERR_NO_ERROR;

    if (ospvObject == OSPC_OSNULL)
    {
        errorcode = OSPC_ERR_ASN1_NULL_POINTER;
        OSPM_DBGERRORLOG(errorcode, "Invalid pointer to Object");
    }

    if (errorcode == OSPC_ERR_NO_ERROR)
    {
        *ospvParseResults = ospvObject->ParseResults;
    }

    return errorcode;
}


int
OSPPASN1ObjectNew(
    OSPTASN1OBJECT **ospvASN1Object,
    OSPEASN1DATAREFID ospvDataRefId)
{
    int errorcode = OSPC_ERR_NO_ERROR;
    OSPTASN1OBJECT *newObject = OSPC_OSNULL;
    OSPTASN1ELEMENTINFO *newElement = OSPC_OSNULL;
    OSPTASN1PARSERESULT *newResult = OSPC_OSNULL;

    if (errorcode == OSPC_ERR_NO_ERROR)
    {
        /* Get a new Element Info */
        errorcode = OSPPASN1ElementCreate(&newElement);

    }

    if (errorcode == OSPC_ERR_NO_ERROR)
    {
        errorcode = PTPResultsCreate(&newResult, newElement, ospvDataRefId);
    }


    if (errorcode == OSPC_ERR_NO_ERROR)
    {
        errorcode = OSPPASN1ObjectCreate(&newObject, newElement, newResult);
    }

    if (errorcode == OSPC_ERR_NO_ERROR)
    {
        *ospvASN1Object = newObject;
    }
    else
    {
        OSPPASN1ObjectDelete(&newObject);
        OSPPASN1ElementDelete(&newElement,0);
        PTPResultsDelete(&newResult);
    }

    return errorcode;
}

int
OSPPASN1ObjectCreate(
    OSPTASN1OBJECT **ospvASN1Object,
    OSPTASN1ELEMENTINFO *ospvElementInfo,
    OSPTASN1PARSERESULT *ospvParseResults)
{
    int errorcode = OSPC_ERR_NO_ERROR;
    OSPTASN1OBJECT *newObject = OSPC_OSNULL;

    OSPM_MALLOC(newObject, OSPTASN1OBJECT, sizeof(OSPTASN1OBJECT));
    if (newObject == OSPC_OSNULL)
    {
        errorcode = OSPC_ERR_ASN1_UNABLE_TO_ALLOCATE_SPACE;
        OSPM_DBGERRORLOG(errorcode, "Unable to create an ASN1 Object");
    }

    if (errorcode == OSPC_ERR_NO_ERROR)
    {
        /* Init the new object */
        OSPM_MEMSET(newObject, 0, sizeof(OSPTASN1OBJECT));

        newObject->ElementInfo = ospvElementInfo;
        newObject->ParseResults = ospvParseResults;
        *ospvASN1Object = newObject;
    }
    else
    {
        OSPPASN1ObjectDelete(&newObject);
    }
    return errorcode;
}


void
OSPPASN1ObjectDelete(
    OSPTASN1OBJECT **ospvASN1Object)
{
    OSPTASN1OBJECT *object = OSPC_OSNULL;

    if (ospvASN1Object != OSPC_OSNULL)
    {
        object = *ospvASN1Object;

        if (object != OSPC_OSNULL)
        {
            OSPPASN1ElementDelete(&(object->ElementInfo),0);
            PTPResultsDelete(&(object->ParseResults));

            OSPM_FREE(*ospvASN1Object); 
            *ospvASN1Object = OSPC_OSNULL;
        }
    }
    return;
}


int
OSPPASN1ObjectCopyElementObject(
    OSPTASN1OBJECT **ospvFoundObject,
    OSPTASN1OBJECT *ospvParentObject,
    OSPEASN1DATAREFID ospvDataRefId)
{
    int errorcode = OSPC_ERR_NO_ERROR;
    OSPTASN1OBJECT  foundObject;
    OSPTASN1PARSERESULT *parseResults = OSPC_OSNULL;
    OSPTASN1ELEMENTINFO *eInfo = OSPC_OSNULL;


    OSPM_MEMSET(&foundObject, 0, sizeof(OSPTASN1OBJECT));

    errorcode = OSPPASN1ObjectGetParseResults(ospvParentObject, &parseResults);


    if (errorcode == OSPC_ERR_NO_ERROR)
    {
        errorcode = PTPResultsGetElement(ospvDataRefId, parseResults, &eInfo);
    }
    if (errorcode == OSPC_ERR_NO_ERROR)
    {
        errorcode = PTPResultsCreate(&parseResults, eInfo, ospvDataRefId);
    }

    if (errorcode == OSPC_ERR_NO_ERROR)
    {
        foundObject.ElementInfo = eInfo;
        foundObject.ParseResults = parseResults;

        errorcode = OSPPASN1ObjectCopy(ospvFoundObject, &foundObject);

        PTPResultsDelete(&parseResults);
    }

    return errorcode;
}

int
OSPPASN1ObjectGetElementByDataRef(
    OSPTASN1OBJECT *ospvObject,
    OSPTASN1ELEMENTINFO **ospvElementInfo,
    OSPEASN1DATAREFID ospvDataRefId)
{
    int errorcode = OSPC_ERR_NO_ERROR;

    OSPTASN1OBJECT *foundObject = OSPC_OSNULL;

    if (errorcode == OSPC_ERR_NO_ERROR)
    {
        errorcode = OSPPASN1ObjectCopyElementObject( &foundObject,
            ospvObject, ospvDataRefId);
    }

    if (errorcode == OSPC_ERR_NO_ERROR)
    {
        errorcode = OSPPASN1ObjectGetElementInfo(foundObject, ospvElementInfo);
    }

    if(foundObject != OSPC_OSNULL)
    {
        OSPPASN1ElementDelete(&(foundObject->ParseResults->ElementInfo),0);
        OSPM_FREE(foundObject->ParseResults);
        OSPM_FREE(foundObject);
    }

    return errorcode;
}


/* ObjectCopy 
This routine only copies the object and it's immediate children,i.e. the
element info and parse results that are pointed to by it's pointers.  It
DOES NOT recurse through the element info linked list(s), or grab all of
the results in the parse results linked list. */

int
OSPPASN1ObjectCopy(
    OSPTASN1OBJECT **ospvDstObject,
    OSPTASN1OBJECT *ospvSrcObject)
{
    int errorcode = OSPC_ERR_NO_ERROR;

    OSPTASN1OBJECT *newObject = OSPC_OSNULL;
    OSPTASN1ELEMENTINFO *eInfo = OSPC_OSNULL;
    OSPTASN1ELEMENTINFO *newElement = OSPC_OSNULL;
    OSPTASN1PARSERESULT *parseResults = OSPC_OSNULL;
    OSPTASN1PARSERESULT *newResult = OSPC_OSNULL;

    /* Create the new object */
    OSPM_MALLOC(newObject, OSPTASN1OBJECT, sizeof(OSPTASN1OBJECT));

    if (newObject == OSPC_OSNULL)
    {
        errorcode = OSPC_ERR_ASN1_UNABLE_TO_ALLOCATE_SPACE;
        OSPM_DBGERRORLOG(errorcode, "Unable to create an ASN1 Object for copy");
    }
    else
    {
        OSPM_MEMSET(newObject, 0, sizeof(newObject));
    }

    /* Get the element info from the source object */
    if (errorcode == OSPC_ERR_NO_ERROR)
    {
        errorcode = OSPPASN1ObjectGetElementInfo(ospvSrcObject, &eInfo);
    }

    /* Get the parse results from the source object */
    if (errorcode == OSPC_ERR_NO_ERROR)
    {
        errorcode = OSPPASN1ObjectGetParseResults(ospvSrcObject, 
            &parseResults);
    }

    if (errorcode == OSPC_ERR_NO_ERROR)
    {
        errorcode = OSPPASN1ElementCopy(&newElement, eInfo);
    }

    if (errorcode == OSPC_ERR_NO_ERROR)
    {
        errorcode = PTPResultsCopy(&newResult, parseResults);
    }

    if (errorcode == OSPC_ERR_NO_ERROR)
    {
        newObject->ElementInfo = newElement;
        newObject->ParseResults = newResult;
        *ospvDstObject = newObject;
    }
    else
    {
        OSPM_FREE(newElement);
        OSPM_FREE(newResult);
        OSPM_FREE(newObject);
    }
    return errorcode;
}

int
OSPPASN1ObjectAddChild( 
    OSPTASN1OBJECT  *ospvParent,
    OSPTASN1OBJECT  *ospvChild,
    OSPEASN1DATAREFID ospvDataRefId)
{
    int errorcode = OSPC_ERR_NO_ERROR;
    OSPTASN1ELEMENTINFO *parentElement = OSPC_OSNULL;
    OSPTASN1ELEMENTINFO *childElement = OSPC_OSNULL;
    OSPTASN1PARSERESULT *tmpResults = OSPC_OSNULL;
    OSPTASN1PARSERESULT *lastResult = OSPC_OSNULL;

    unsigned char *tmpDataRef = OSPC_OSNULL;

    /* Add the child's eInfo tree to the parent's eInfo tree on the end of
    the contentElementInfo chain. Then add the child's result list to the 
    end of the parents result list. In both cases, use the data provided
    without allocating new data. */

    errorcode = OSPPASN1ObjectGetElementInfo(ospvParent, &parentElement);

    if (errorcode == OSPC_ERR_NO_ERROR)
    {
        errorcode = OSPPASN1ObjectGetElementInfo(ospvChild, &childElement);
    }

    if (errorcode == OSPC_ERR_NO_ERROR)
    {
        /* Get parents current parse results */
        errorcode = OSPPASN1ObjectGetParseResults(ospvParent, &tmpResults);
    }

    if (errorcode == OSPC_ERR_NO_ERROR)
    {
        /* Go to the end of the list */
        lastResult = PTPResultsEndOfList(tmpResults);
    }

    if (errorcode == OSPC_ERR_NO_ERROR)
    {
        /* Get the childs parse results */
        errorcode = OSPPASN1ObjectGetParseResults(ospvChild, &tmpResults);
    }

    if (errorcode == OSPC_ERR_NO_ERROR)
    {
        /* Update the child's dataReference */
        errorcode = PTPDataRefIdGetValue(ospvDataRefId, &tmpDataRef);
        OSPM_MEMCPY(tmpResults->DataReference, tmpDataRef,
            OSPC_ASN1_DATAREF_MAXLENGTH);
    }

    if (errorcode == OSPC_ERR_NO_ERROR)
    {
        /* Concatenate them to the list */
        lastResult->NextResult = tmpResults;
    }

    return errorcode;
}

/* OSPPASN1ObjectDeparse
    Walk through the parse tables using a depth first search.  Build an
    element list for the object by adding elements to handle Sequences and
    Sets, etc.  When a primitive element encountered in
    the tables, look for a matching result in the objects result list.  If
    found, add it to the parse table being built.  This sets you up to
    encode the parsed object by scanning the element list.
*/

int
OSPPASN1ObjectDeparse(
    OSPTASN1OBJECT *ospvObject,
    OSPEASN1PARSETABLEID ospvParseTableId,
    OSPEASN1DATAREFID ospvDataRefId)
{
    int errorcode = OSPC_ERR_NO_ERROR;
    OSPTASN1PARSERESULT     *origParseResults;
    OSPTASN1PARSERESULT     *parseResults;
    OSPTASN1ELEMENTINFO     *elementInfo;
    unsigned char dataReference[OSPC_ASN1_DATAREF_MAXLENGTH];
    unsigned char *dataReferencePtr = OSPC_OSNULL;

    /* Get the process started. Call ElementDeparse to generate the element
    list */

    OSPM_MEMSET(dataReference, 0xff, sizeof(dataReference));
    errorcode = PTPDataRefIdGetValue(ospvDataRefId, &dataReferencePtr);

    /* Need to get the parse results from the object */
    errorcode = OSPPASN1ObjectGetParseResults(ospvObject, &origParseResults);
    parseResults = origParseResults;

    if (errorcode == OSPC_ERR_NO_ERROR)
    {
        elementInfo = ospvObject->ElementInfo;

        /* Generate the element list first - this is a recursive call */
        errorcode = OSPPASN1ElementDeparse(&elementInfo, &parseResults, 
            ospvParseTableId, dataReferencePtr);
    }

    return errorcode;
}


int 
OSPPASN1ObjectEncode(
    OSPTASN1OBJECT **ospvEncodedObject,
    unsigned char  *ospvTag,
    unsigned        ospvTagLength,
    unsigned char   ospvTagFlags,
    unsigned char  *ospvContent,
    unsigned        ospvContentLength,
    OSPEASN1DATAREFID ospvDataRefId)
{
    int errorcode = OSPC_ERR_NO_ERROR;

    OSPTASN1ELEMENTINFO *eInfo = OSPC_OSNULL;
    OSPTASN1OBJECT *encodedObject = OSPC_OSNULL;

    errorcode = OSPPASN1ElementFormat(&eInfo, 
        ospvTag, ospvTagFlags, ospvTagLength, 
        ospvContent, ospvContentLength);

    if (errorcode == OSPC_ERR_NO_ERROR)
    {
        errorcode = OSPPASN1ObjectFormat(&encodedObject, eInfo, ospvDataRefId);
    }

    if (errorcode != OSPC_ERR_NO_ERROR)
    {
        if (eInfo != OSPC_OSNULL)
        {
            OSPPASN1ElementDelete(&eInfo,0);
        }
        if (encodedObject != OSPC_OSNULL)
        {
            OSPPASN1ObjectDelete(&encodedObject);
        }
    }
    else
    {
        *ospvEncodedObject = encodedObject;
    }

    return errorcode;
}


int 
OSPPASN1ObjectFormat(
    OSPTASN1OBJECT **ospvObject,
    OSPTASN1ELEMENTINFO *ospvElement,
    OSPEASN1DATAREFID ospvDataRefId)
{
    int errorcode = OSPC_ERR_NO_ERROR;

    OSPTASN1OBJECT *object = OSPC_OSNULL;
    OSPTASN1PARSERESULT *parseResults = OSPC_OSNULL;

    OSPM_MALLOC(object, OSPTASN1OBJECT, sizeof(OSPTASN1OBJECT));

    if (object == OSPC_OSNULL)
    {
        errorcode = OSPC_ERR_ASN1_UNABLE_TO_ALLOCATE_SPACE;
        OSPM_DBGERRORLOG(errorcode, 
            "Unable to allocate space for new object");
    }
    else
    {
        OSPM_MEMSET(object, 0, sizeof(object));
    }

    if (errorcode == OSPC_ERR_NO_ERROR)
    {

        errorcode = PTPResultsCreate(&parseResults, ospvElement, ospvDataRefId);
    }

    if (errorcode != OSPC_ERR_NO_ERROR)
    {
        OSPM_FREE(object);
        OSPM_FREE(parseResults);
    }
    else
    {
        object->ElementInfo = ospvElement;  
        object->ParseResults = parseResults;
        *ospvObject = object;
    }

    return errorcode;
}