C

Extract XML string from a .p7m byte array (e.g. FATTURA ELETTRONICA, ITALY)

See more Digital Signatures Examples

_LANGUAGE_ example to extract the original XML from a .p7m (Signed-Data PKCS7 Format) provided as a byte array.

One use for this example is to extract the original XML from a Fattura Elettronica .p7m signature.

C

#include <C_CkFileAccess.h>
#include <C_CkByteData.h>
#include <C_CkCrypt2.h>

void ChilkatSample(void)
    {
    HCkFileAccess fac;
    HCkByteData p7mBytes;
    HCkCrypt2 crypt;
    const char *originalXml;

    //  This example requires the Chilkat API to have been previously unlocked.
    //  See Global Unlock Sample for sample code.

    fac = CkFileAccess_Create();
    p7mBytes = CkByteData_Create();
    success = CkFileAccess_ReadEntireFile(fac,"testData/p7m/fattura_signature.p7m",p7mBytes);
    if (CkFileAccess_getLastMethodSuccess(fac) != TRUE) {
        printf("%s\n",CkFileAccess_lastErrorText(fac));
        CkFileAccess_Dispose(fac);
        CkByteData_Dispose(p7mBytes);
        return;
    }

    crypt = CkCrypt2_Create();

    originalXml = CkCrypt2_opaqueVerifyString(crypt,p7mBytes);
    if (CkCrypt2_getLastMethodSuccess(crypt) != TRUE) {
        printf("%s\n",CkFileAccess_lastErrorText(fac));
        CkFileAccess_Dispose(fac);
        CkByteData_Dispose(p7mBytes);
        CkCrypt2_Dispose(crypt);
        return;
    }

    printf("Original XML:\n");
    printf("%s\n",originalXml);

    printf("Success!\n");


    CkFileAccess_Dispose(fac);
    CkByteData_Dispose(p7mBytes);
    CkCrypt2_Dispose(crypt);

    }