Unicode C

Sign String to create a CAdES-T Signature, using HTTP Proxy to Access Timestamp Server

This example will sign a string to create a CAdEST-T signature. It will use an HTTP proxy to access the timestamp server. Unicode C

#include <C_CkCrypt2W.h>
#include <C_CkCertW.h>
#include <C_CkJsonObjectW.h>
#include <C_CkBinDataW.h>
#include <C_CkHttpW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkCrypt2W crypt;
    HCkCertW cert;
    HCkJsonObjectW attrs;
    const wchar_t *strToSign;
    HCkBinDataW bd;
    HCkHttpW http;

    success = FALSE;

    crypt = CkCrypt2W_Create();

    cert = CkCertW_Create();
    CkCertW_putSmartCardPin(cert,L"123456");
    success = CkCertW_LoadFromSmartcard(cert,L"");
    if (success != TRUE) {
        wprintf(L"%s\n",CkCertW_lastErrorText(cert));
        CkCrypt2W_Dispose(crypt);
        CkCertW_Dispose(cert);
        return;
    }

    success = CkCrypt2W_SetSigningCert(crypt,cert);

    //  Use SHA-256 rather than the default of SHA-1
    CkCrypt2W_putHashAlgorithm(crypt,L"sha256");

    //  Create JSON that tells Chilkat what signing attributes to include:
    attrs = CkJsonObjectW_Create();
    CkJsonObjectW_UpdateBool(attrs,L"contentType",TRUE);
    CkJsonObjectW_UpdateBool(attrs,L"signingTime",TRUE);
    CkJsonObjectW_UpdateBool(attrs,L"messageDigest",TRUE);
    CkJsonObjectW_UpdateBool(attrs,L"signingCertificateV2",TRUE);

    //  A CAdES-T signature is one that includes a timestampToken created by an online TSA (time stamping authority).
    //  We must include the TSA's URL, as well as a few options to indicate what is desired.
    //  Except for the TSA URL, the options shown here are typically what you would need.
    CkJsonObjectW_UpdateBool(attrs,L"timestampToken.enabled",TRUE);
    CkJsonObjectW_UpdateString(attrs,L"timestampToken.tsaUrl",L"https://freetsa.org/tsr");
    CkJsonObjectW_UpdateBool(attrs,L"timestampToken.addNonce",FALSE);
    CkJsonObjectW_UpdateBool(attrs,L"timestampToken.requestTsaCert",TRUE);
    CkJsonObjectW_UpdateString(attrs,L"timestampToken.hashAlg",L"sha256");

    CkCrypt2W_putSigningAttributes(crypt,CkJsonObjectW_emit(attrs));

    strToSign = L"Hello World!";

    bd = CkBinDataW_Create();
    CkBinDataW_AppendString(bd,strToSign,L"utf-8");

    //  -------------------------------------------------------------------------
    //  The purpose of this example is to show how an HTTP object with custom
    //  settings can be used to access the Internet when signing.
    //  Access to the Internet is needed to communicate with the timestamp server.
    http = CkHttpW_Create();
    //  This can be a domain name, hostname, or IP address.
    CkHttpW_putProxyDomain(http,L"172.16.16.56");
    CkHttpW_putProxyPort(http,808);
    CkHttpW_putProxyLogin(http,L"myProxyLogin");
    CkHttpW_putProxyPassword(http,L"myProxyPassword");
    CkCrypt2W_SetTsaHttpObj(crypt,http);
    //  -------------------------------------------------------------------------

    //  This creates the CAdES-T signature.  During the signature creation, it
    //  communicates with the TSA to get a timestampToken.
    //  The contents of bd are signed and replaced with the CAdES-T signature (which embeds the original content).
    success = CkCrypt2W_OpaqueSignBd(crypt,bd);
    if (success != TRUE) {
        wprintf(L"%s\n",CkCrypt2W_lastErrorText(crypt));
        CkCrypt2W_Dispose(crypt);
        CkCertW_Dispose(cert);
        CkJsonObjectW_Dispose(attrs);
        CkBinDataW_Dispose(bd);
        CkHttpW_Dispose(http);
        return;
    }

    //  Get the signature in base64 format:
    wprintf(L"%s\n",CkBinDataW_getEncoded(bd,L"base64_mime"));

    wprintf(L"Success.\n");


    CkCrypt2W_Dispose(crypt);
    CkCertW_Dispose(cert);
    CkJsonObjectW_Dispose(attrs);
    CkBinDataW_Dispose(bd);
    CkHttpW_Dispose(http);

    }