(C) Decrypt a .p7m File (using a PFX)

C sample code showing how to decrypt a .p7m using a .p12 / .pfx certificate w/ private key.

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#include <C_CkCrypt2.h>

void ChilkatSample(void)
    {
    HCkCrypt2 crypt;
    const char *pfxPath;
    const char *pfxPassword;
    BOOL success;
    const char *inPath;
    const char *outPath;

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

    crypt = CkCrypt2_Create();

    // Use a digital certificate and private key from a PFX file (.pfx or .p12).
    pfxPath = "myCertAndKey.pfx";
    pfxPassword = "test123";

    success = CkCrypt2_AddPfxSourceFile(crypt,pfxPath,pfxPassword);
    if (success != TRUE) {
        printf("%s\n",CkCrypt2_lastErrorText(crypt));
        CkCrypt2_Dispose(crypt);
        return;
    }

    // Set the  outPath to whatever is appropriate.
    // If you are decrypting a PDF, your output might be "out.pdf"...
    inPath = "smime.p7m";
    outPath = "original.txt";

    // Indicate that we're doing public key decryption (i.e. PKCS7)
    CkCrypt2_putCryptAlgorithm(crypt,"pki");

    success = CkCrypt2_CkDecryptFile(crypt,inPath,outPath);
    if (success == FALSE) {
        printf("%s\n",CkCrypt2_lastErrorText(crypt));
        CkCrypt2_Dispose(crypt);
        return;
    }

    printf("Success.\n");


    CkCrypt2_Dispose(crypt);

    }