import_export.c

Example of exporting and importing a symmetric key.

See Note on examples.

#include <string.h>
#include <stdlib.h>
#include <stdio.h>
 
#include "dinamo.h" /* header of Dinamo */
 
#define HOST_ADDR "127.0.0.1"
#define USER_ID "master"
#define USER_PWD "12345678"
 
#define KEY_ID "Test_Key"
#define KEY_TYPE ALG_AES_128
 
int main()
{
    int nRet = 0;
    struct AUTH_PWD authPwd;
    HSESSIONCTX hSession = NULL;
    HKEYCTX hKey = NULL;
    BYTE pbKey[16] = {0};
    DWORD pbKeyLen = sizeof(pbKey);
 
    //Inicializa as bibliotecas do Dinamo
    nRet =  DInitialize(0);
    if (nRet){
        printf("Function failure: DInitialize \nError code: %d\n",nRet);
        goto clean;
    }
 
    printf("Libraries initialized.\n");
 
    //Inicializa a estrutura para conexão com o HSM
    strncpy(authPwd. szAddr, HOST_ADDR, sizeof(authPwd.szAddr));
    authPwd. nPort = DEFAULT_PORT;
    strncpy(authPwd. szUserId, USER_ID, sizeof(authPwd.szUserId));
    strncpy(authPwd. szPassword, USER_PWD, sizeof(authPwd.szPassword));
 
    nRet = DOpenSession(&hSession, SS_USER_PWD,(BYTE *)&authPwd, sizeof(authPwd), ENCRYPTED_CONN);
    if (nRet){
        printf("Function failure: DOpenSession \nError code: %d\n",nRet);
        goto clean;
    }
 
    printf("Session with Dinamo established.\n");
 
    //Importa chave simétrica AES_128.
    nRet = DImportKey(hSession, KEY_ID, NULL, PLAINTEXTKEY_BLOB, KEY_TYPE,
                      EXPORTABLE_KEY, pbKey, sizeof(pbKey), &hKey);
    if(nRet){
        printf("Function failure: DImportKey \nError code: %d\n",nRet);
        goto clean;
    }
 
    printf("Symmetric key imported in clear text.\n");
 
    //Exporta a chave simétrica.
    nRet = DExportKey(hKey, NULL, PLAINTEXTKEY_BLOB, 0, pbKey, &pbKeyLen);
    if(nRet){
        printf("Function failure: DExportKey \nError code: %d\n",nRet);
        goto clean;
    }
 
    printf("Symmetric key exported in clear text.\n");
 
    clean:
    if (hKey){
        DDestroyKey(&hKey, REMOVE_FROM_HSM);
        printf("Key successfully removed.\n");
    }
    if (hSession){
        DCloseSession(&hSession, 0);
        printf("Session closed.\n");
    }
 
    DFinalize();
    printf("Libraries finished.\n");
 
    return nRet;
}