Unicode C

Duplicate OpensSSL to Sign File and Output Binary DER

See more OpenSSL Examples

This example duplicates the following:

openssl smime -sign -in INPUT.xml -signer SIGN.PEM -passin pass:MYPASS -outform der -binary -nodetach -out SIGNED.P7M

Note: Although "smime" is the OpenSSL command, it's not actually producing S/MIME. The arguments "-outform der -binary" indicates that the output is binary DER (i.e. the PKCS7 binary signature). The input can be any type of file: XML, PDF, JPG, ... *anything*...

Unicode C

#include <C_CkCrypt2W.h>
#include <C_CkPemW.h>
#include <C_CkPrivateKeyW.h>
#include <C_CkCertW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkCrypt2W crypt;
    HCkPemW pem;
    HCkPrivateKeyW privkey;
    HCkCertW cert;
    HCkCertW certFromP12;

    success = FALSE;

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

    crypt = CkCrypt2W_Create();

    // Load the PEM containing cert + private key.
    pem = CkPemW_Create();
    success = CkPemW_LoadPemFile(pem,L"qa_data/pem/myPem.pem",L"password");
    if (success == FALSE) {
        wprintf(L"%s\n",CkPemW_lastErrorText(pem));
        CkCrypt2W_Dispose(crypt);
        CkPemW_Dispose(pem);
        return;
    }

    privkey = CkPrivateKeyW_Create();
    success = CkPemW_PrivateKeyAt(pem,0,privkey);
    if (success == FALSE) {
        wprintf(L"%s\n",CkPemW_lastErrorText(pem));
        CkCrypt2W_Dispose(crypt);
        CkPemW_Dispose(pem);
        CkPrivateKeyW_Dispose(privkey);
        return;
    }

    cert = CkCertW_Create();
    success = CkPemW_CertAt(pem,0,cert);
    if (success == FALSE) {
        wprintf(L"%s\n",CkPemW_lastErrorText(pem));
        CkCrypt2W_Dispose(crypt);
        CkPemW_Dispose(pem);
        CkPrivateKeyW_Dispose(privkey);
        CkCertW_Dispose(cert);
        return;
    }

    success = CkCrypt2W_SetSigningCert2(crypt,cert,privkey);
    if (success == FALSE) {
        wprintf(L"%s\n",CkCrypt2W_lastErrorText(crypt));
        CkCrypt2W_Dispose(crypt);
        CkPemW_Dispose(pem);
        CkPrivateKeyW_Dispose(privkey);
        CkCertW_Dispose(cert);
        return;
    }

    // Alternatively, we could use a .pfx/.p12 file.
    // (Chilkat also supports other formats/sources for cert/private keys...)
    certFromP12 = CkCertW_Create();
    success = CkCertW_LoadPfxFile(certFromP12,L"qa_data/p12/myP12.p12",L"password");
    if (success == FALSE) {
        wprintf(L"%s\n",CkCertW_lastErrorText(certFromP12));
        CkCrypt2W_Dispose(crypt);
        CkPemW_Dispose(pem);
        CkPrivateKeyW_Dispose(privkey);
        CkCertW_Dispose(cert);
        CkCertW_Dispose(certFromP12);
        return;
    }

    // The certificate, when loaded from a .pfx/.p12, will automatically 
    // include the associated private key, assuming it's present in the .p12.
    // We don't have to explicitly provide the private key as in the
    // lines of code above that use the PEM file.
    success = CkCrypt2W_SetSigningCert(crypt,certFromP12);
    if (success == FALSE) {
        wprintf(L"%s\n",CkCrypt2W_lastErrorText(crypt));
        CkCrypt2W_Dispose(crypt);
        CkPemW_Dispose(pem);
        CkPrivateKeyW_Dispose(privkey);
        CkCertW_Dispose(cert);
        CkCertW_Dispose(certFromP12);
        return;
    }

    // Create the opaque signature (PKCS7 binary DER that contains both the signature and original file data).
    success = CkCrypt2W_CreateP7M(crypt,L"qa_data/infile.anything",L"qa_output/outfile.p7m");
    if (success == FALSE) {
        wprintf(L"%s\n",CkCrypt2W_lastErrorText(crypt));
        CkCrypt2W_Dispose(crypt);
        CkPemW_Dispose(pem);
        CkPrivateKeyW_Dispose(privkey);
        CkCertW_Dispose(cert);
        CkCertW_Dispose(certFromP12);
        return;
    }

    wprintf(L"Success.\n");


    CkCrypt2W_Dispose(crypt);
    CkPemW_Dispose(pem);
    CkPrivateKeyW_Dispose(privkey);
    CkCertW_Dispose(cert);
    CkCertW_Dispose(certFromP12);

    }