C

Duplicate openssl smime -encrypt -binary -aes-256-cbc -in some_file.dat -out some_file.dat.enc -outform DER cert.crt

See more OpenSSL Examples

Demonstrates how to encrypt to binary DER using 256-bit AES (CBC mode) as the underlying symmetric encryption algorithm, to produce PKCS7 enveloped data (binary DER).

Duplicates the following openssl command:

openssl smime -encrypt -binary -aes-256-cbc -in some_file.dat -out some_file.dat.enc -outform DER cert.crt

C

#include <C_CkCert.h>
#include <C_CkBinData.h>
#include <C_CkCrypt2.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkCert cert;
    HCkBinData bd;
    HCkCrypt2 crypt;

    success = FALSE;

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

    cert = CkCert_Create();
    success = CkCert_LoadFromFile(cert,"qa_data/openssl/EE.cer");
    if (success == FALSE) {
        printf("%s\n",CkCert_lastErrorText(cert));
        CkCert_Dispose(cert);
        return;
    }

    bd = CkBinData_Create();
    success = CkBinData_LoadFile(bd,"qa_data/openssl/hello.txt");
    // Assuming success..

    crypt = CkCrypt2_Create();
    success = CkCrypt2_SetEncryptCert(crypt,cert);
    if (success == FALSE) {
        printf("%s\n",CkCrypt2_lastErrorText(crypt));
        CkCert_Dispose(cert);
        CkBinData_Dispose(bd);
        CkCrypt2_Dispose(crypt);
        return;
    }

    CkCrypt2_putCryptAlgorithm(crypt,"PKI");

    // Indicate the underlying symmetric encryption to be used:
    CkCrypt2_putPkcs7CryptAlg(crypt,"aes");
    CkCrypt2_putKeyLength(crypt,256);
    CkCrypt2_putCipherMode(crypt,"cbc");

    success = CkCrypt2_CkEncryptFile(crypt,"qa_data/openssl/hello.txt","qa_output/hello.txt.enc");
    if (success == FALSE) {
        printf("%s\n",CkCrypt2_lastErrorText(crypt));
        CkCert_Dispose(cert);
        CkBinData_Dispose(bd);
        CkCrypt2_Dispose(crypt);
        return;
    }

    printf("Success.\n");


    CkCert_Dispose(cert);
    CkBinData_Dispose(bd);
    CkCrypt2_Dispose(crypt);

    }