pkcs7.c

vc环境下的pgp源码

    if (asnstruct == NULL) {
        PKIERR(PKIErrUnpackNoStructure);
        return 0;
    }

    if (buf == NULL) {
        PKIERR(PKIErrUnpackNoBlockPtr);
        return 0;
    }

    if (buflen <= 0) return 0; /* no error -- no block */

    if ( (*buf & 0xDF) != (tag & 0xDF) )
        return 0; /* no error code, just no block */
    if ( (*buf & 0x20) != 0x20) {
        PKIERR(PKIErrUnpackInvalidEncoding);
        return 0;
    }

    /* accept the tag byte */
    bytesused++;

    /* get the block length */
    bytesused += PKIGetLength(buf+bytesused, &datasize);
    if ((int)datasize == -1) {
        localsize = buflen;
        indef = 1;
    }
    else {
        localsize = bytesused + datasize;
        if (localsize > buflen) {
            PKIERR(PKIErrUnpackOverrun);
            return 0;
        }
    }

    PKITRACE_INCR_LEVEL;
  do {

    /* field contentType of ContentInfo */
    bytesused += PKIUnpkInPlaceContentType(ctx, &(asnstruct->contentType), buf+bytesused,
                        localsize-bytesused, PKIID_ContentType, erret);
    if (bytesused > localsize || *erret != 0)
        break;

    /* field content of ContentInfo */
    if (!indef && bytesused >= localsize) {
        PKITRACE_DECR_LEVEL;
        return bytesused;
    }
    if (indef && *(buf+bytesused) == 0x00 &&
                 *(buf+bytesused+1) == 0x00) {
        PKITRACE_DECR_LEVEL;
        bytesused += 2;
        return bytesused;
    }
    { /* local declaration block*/
        size_t taggeddatasize;
        size_t taggedlocalsize;
        size_t used;

        used = PKITakeTag(buf+bytesused, 0xa0 | 0x00,
                          &taggeddatasize);
        bytesused += used;

        if ((int)taggeddatasize == -1 && used != 0) {
            PKITRACE_PRINT_TAG(0xa0|0x00, 0x00);
            PKITRACE_INCR_LEVEL;
            if (asnstruct->content != NULL)
                PKIFreeANY(ctx, asnstruct->content);
            bytesused += PKIUnpackANYInternal(ctx, &(asnstruct->content),
                    buf+bytesused, localsize-bytesused, PKIID_ANY, erret);
            PKITRACE_DECR_LEVEL;
            if ( *(buf+bytesused) != 0x00 &&
                 *(buf+bytesused+1) != 0x00 ) {
                PKIERR(PKIErrUnpackInvalidEncoding);
                break;
            }
            bytesused += 2;
        }

        else if (taggeddatasize > 0 && used != 0) {
            taggedlocalsize = bytesused + taggeddatasize;
            PKITRACE_PRINT_TAG(0xa0|0x00, 0x00);
            PKITRACE_INCR_LEVEL;
            if (asnstruct->content != NULL)
                PKIFreeANY(ctx, asnstruct->content);
            bytesused += PKIUnpackANYInternal(ctx, &(asnstruct->content),
                       buf+bytesused, localsize-bytesused, PKIID_ANY, erret);
            PKITRACE_DECR_LEVEL;
            if (bytesused != taggedlocalsize) {
                PKIERR(PKIErrUnpackTaggedLth);
                break;
            }
        }
    } /* for the local declaration block */
    if (bytesused > localsize || *erret != 0)
        break;

    if (indef) {
        if ( *(buf+bytesused) != 0x00 &&
             *(buf+bytesused+1) != 0x00 ) {
            PKIERR(PKIErrUnpackInvalidEncoding);
            break;
        }
        bytesused += 2;
    }
  } while(0);

    PKITRACE_DECR_LEVEL;
    if (bytesused > localsize && *erret == 0)
        PKIERR(PKIErrUnpackOverrun);
    if (!indef && bytesused < localsize && *erret == 0)
        PKIERR(PKIErrUnpackUnderrun);

    return bytesused;
} /* PKIUnpkInPlaceContentInfo */

size_t PKIUnpackContentInfoInternal(
    PKICONTEXT *ctx,
    PKIContentInfo **asnstruct,
    const unsigned char *buf,
    size_t buflen,
    unsigned char tag,
    int *erret)
{
    size_t bytesused;
    PKIContentInfo *local = NULL;

    if (erret == NULL) return 0;
    *erret = 0;

    if (ctx == NULL) {
        PKIERR(PKIErrBadContext);
        return 0;
    }
    if (asnstruct == NULL) {
        PKIERR(PKIErrUnpackNoStructure);
        return 0;
    }
    *asnstruct = NULL;

    if (buflen <= 0) return 0; /* no bytes left */

    if ( (*buf & 0xDF) != (tag & 0xDF) ) 
        return 0; /* not correct tag */

    local = PKINewContentInfo(ctx);	/* carve a block for it */
    bytesused = PKIUnpkInPlaceContentInfo(ctx, local, buf, buflen, tag, erret);
    if (*erret != 0) {
        PKIFreeContentInfo(ctx, local);
        return 0;
    }
    *asnstruct = local;
    return bytesused;
} /* PKIUnpackContentInfoInternal */


/******************************************************************
 * Routines for ExtendedCertificateInfo
 ******************************************************************/

size_t PKISizeofExtendedCertificateInfoInternal(PKIExtendedCertificateInfo *asnstruct, int outerSizeFlag, int expTaggedFlag)
{
    size_t body_size = 0;

    if (asnstruct == NULL)
        return 0;

    body_size =
            PKISizeofVersionInternal(&asnstruct->version, PKITRUE, PKIFALSE)
          + PKISizeofCertificateInternal(&asnstruct->certificate, PKITRUE, PKIFALSE)
          + PKISizeofAttributesInternal(&asnstruct->attributes, PKITRUE, PKIFALSE) ;

    if (outerSizeFlag == PKITRUE)
        body_size = PKITagged(body_size, 1);

    if (expTaggedFlag == PKITRUE)
        body_size = PKITagged(body_size, 1); /* this is seq like */

    return body_size;

} /* PKISizeofExtendedCertificateInfoInternal */

void PKIDropInPlaceExtendedCertificateInfo(
    PKICONTEXT *ctx,
    PKIExtendedCertificateInfo *f)
{
    if (ctx == NULL)
        return;

    if (f == NULL) return ;
    PKIDropInPlaceVersion(ctx, &(f->version));
    PKIDropInPlaceCertificate(ctx, &(f->certificate));
    PKIDropInPlaceAttributes(ctx, &(f->attributes));
} /* PKIDropInPlaceExtendedCertificateInfo */

size_t PKIPackExtendedCertificateInfoInternal(
    PKICONTEXT *ctx,
    unsigned char *buf,
    size_t buflen,
    PKIExtendedCertificateInfo *asnstruct,
    unsigned char tag,
    int *erret)
{
    size_t bytesused;
    size_t tagsize;
    size_t datasize;

    if (erret == NULL) return 0; /* can't report errors */

    if (ctx == NULL) {
        PKIERR(PKIErrBadContext);
        return 0;
    }
    if (asnstruct == NULL) return 0;

    /* lth of the block body */
    datasize = PKISizeofExtendedCertificateInfo(ctx, asnstruct, PKIFALSE);
    tagsize = 1 + PKILengthSize(datasize);
    if (datasize+tagsize > buflen) {
        PKIERR(PKIErrPackBufferTooShort);
        return 0;
    }

    /* this is a SEQUENCE */
    bytesused = PKIPutTag(buf, (unsigned char)(tag|0x20), datasize);
    if (bytesused != tagsize) {
        PKIERR(PKIErrPackOverrun);
        return bytesused;
    }
    datasize += tagsize;

  do {

    /* field version of ExtendedCertificateInfo */
    bytesused += PKIPackVersionInternal(ctx, buf+bytesused, buflen-bytesused,
                       &(asnstruct->version), PKIID_Version, erret);
    if (bytesused > datasize || *erret != 0)
        break;

    /* field certificate of ExtendedCertificateInfo */
    bytesused += PKIPackCertificateInternal(ctx, buf+bytesused, buflen-bytesused,
                       &(asnstruct->certificate), PKIID_Certificate, erret);
    if (bytesused > datasize || *erret != 0)
        break;

    /* field attributes of ExtendedCertificateInfo */
    bytesused += PKIPackAttributesInternal(ctx, buf+bytesused, buflen-bytesused,
                       &(asnstruct->attributes), PKIID_Attributes, erret);
    if (bytesused > datasize || *erret != 0)
        break;

  } while(0);

    if (bytesused < datasize && *erret == 0)
        PKIERR(PKIErrPackUnderrun)
    else if (bytesused > datasize && *erret == 0)
        PKIERR(PKIErrPackOverrun)

    return bytesused;
} /* PKIPackExtendedCertificateInfoInternal */

size_t PKIUnpkInPlaceExtendedCertificateInfo(
    PKICONTEXT *ctx,
    PKIExtendedCertificateInfo *asnstruct,
    unsigned char *buf,
    size_t buflen,
    unsigned char tag,
    int *erret)
{
    size_t bytesused = 0;
    size_t datasize;
    size_t localsize;
    int indef = 0;

    PKITRACE_PRINT_FN((tag|0x20), 0x30, "SEQUENCE", "ExtendedCertificateInfo" );

    if (erret == NULL) return 0; /* can't report errors */
    *erret = 0;

    if (ctx == NULL) {
        PKIERR(PKIErrBadContext);
        return 0;
    }

    if (asnstruct == NULL) {
        PKIERR(PKIErrUnpackNoStructure);
        return 0;
    }

    if (buf == NULL) {
        PKIERR(PKIErrUnpackNoBlockPtr);
        return 0;
    }

    if (buflen <= 0) return 0; /* no error -- no block */

    if ( (*buf & 0xDF) != (tag & 0xDF) )
        return 0; /* no error code, just no block */
    if ( (*buf & 0x20) != 0x20) {
        PKIERR(PKIErrUnpackInvalidEncoding);
        return 0;
    }

    /* accept the tag byte */
    bytesused++;

    /* get the block length */
    bytesused += PKIGetLength(buf+bytesused, &datasize);
    if ((int)datasize == -1) {
        localsize = buflen;
        indef = 1;
    }
    else {
        localsize = bytesused + datasize;
        if (localsize > buflen) {
            PKIERR(PKIErrUnpackOverrun);
            return 0;
        }
    }

    PKITRACE_INCR_LEVEL;
  do {

    /* field version of ExtendedCertificateInfo */
    bytesused += PKIUnpkInPlaceVersion(ctx, &(asnstruct->version), buf+bytesused,
                        localsize-bytesused, PKIID_Version, erret);
    if (bytesused > localsize || *erret != 0)
        break;

    /* field certificate of ExtendedCertificateInfo */
    bytesused += PKIUnpkInPlaceCertificate(ctx, &(asnstruct->certificate), buf+bytesused,
                        localsize-bytesused, PKIID_Certificate, erret);
    if (bytesused > localsize || *erret != 0)
        break;

    /* field attributes of ExtendedCertificateInfo */
    bytesused += PKIUnpkInPlaceAttributes(ctx, &(asnstruct->attributes), buf+bytesused,
                        localsize-bytesused, PKIID_Attributes, erret);
    if (bytesused > localsize || *erret != 0)
        break;

    if (indef) {
        if ( *(buf+bytesused) != 0x00 &&
             *(buf+bytesused+1) != 0x00 ) {
            PKIERR(PKIErrUnpackInvalidEncoding);
            break;
        }
        bytesused += 2;
    }
  } while(0);

    PKITRACE_DECR_LEVEL;
    if (bytesused > localsize && *erret == 0)
        PKIERR(PKIErrUnpackOverrun);
    if (!indef && bytesused < localsize && *erret == 0)
        PKIERR(PKIErrUnpackUnderrun);

    return bytesused;
} /* PKIUnpkInPlaceExtendedCertificateInfo */

size_t PKIUnpackExtendedCertificateInfoInternal(
    PKICONTEXT *ctx,
    PKIExtendedCertificateInfo **asnstruct,
    unsigned char *buf,
    size_t buflen,
    unsigned char tag,
    int *erret)
{
    size_t bytesused;
    PKIExtendedCertificateInfo *local = NULL;

    if (erret == NULL) return 0;
    *erret = 0;

    if (ctx == NULL) {
        PKIERR(PKIErrBadContext);
        return 0;
    }
    if (asnstruct == NULL) {
        PKIERR(PKIErrUnpackNoStructure);
        return 0;
    }
    *asnstruct = NULL;

    if (buflen <= 0) return 0; /* no bytes left */

    if ( (*buf & 0xDF) != (tag & 0xDF) ) 
        return 0; /* not correct tag */

    local = PKINewExtendedCertificateInfo(ctx);	/* carve a block for it */
    bytesused = PKIUnpkInPlaceExtendedCertificateInfo(ctx, local, buf, buflen, tag, erret);
    if (*erret != 0) {
        PKIFreeExtendedCertificateInfo(ctx, local);
        return 0;
    }
    *asnstruct = local;
    return bytesused;
} /* PKIUnpackExtendedCertificateInfoInternal */


/******************************************************************
 * Routines for IssuerAndSerialNumber
 ******************************************************************/

size_t PKISizeofIssuerAndSerialNumberInternal(PKIIssuerAndSerialNumber *asnstruct, int outerSizeFlag, int expTaggedFlag)
{
    size_t body_size = 0;

    if (asnstruct == NULL)
        return 0;

    body_size =
            PKISizeofNameInternal(&asnstruct->issuer, PKITRUE, PKIFALSE)
          + PKISizeofCertificateSerialNumberInternal(&asnstruct->serialNumber, PKITRUE, PKIFALSE) ;

    if (outerSizeFlag == PKITRUE)
        body_size = PKITagged(body_size, 1);

    if (expTaggedFlag == PKITRUE)
        body_size = PKITagged(body_size, 1); /* this is seq like */

    return body_size;

} /* PKISizeofIssuerAndSerialNumberInternal */

void PKIDropInPlaceIssuerAndSerialNumber(
    PKICONTEXT *ctx,
    PKIIssuerAndSerialNumber *f)
{
    if (ctx == NULL)
        return;

    if (f == NULL) return ;
    PKIDropInPlaceName(ctx, &(f->issuer));
    PKIDropInPlaceCertificateSerialNumber(ctx, &(f->serialNumber));
} /* PKIDropInPlaceIssuerAndSerialNumber */

size_t PKIPackIssuerAndSerialNumberInternal(
    PKICONTEXT *ctx,
    unsigned char *buf,
    size_t buflen,