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 do Dinamo */
 
#define HOST_ADDR       "127.0.0.1"
#define USER_ID         "master"
#define USER_PWD        "12345678"
 
#define KEY_ID          "Chave_Teste"
#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("Falha na funcao: DInitialize \nCodigo de erro: %d\n",nRet);
        goto clean;
    }
 
    printf("Bibliotecas inicializadas.\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("Falha na funcao: DOpenSession \nCodigo de erro: %d\n",nRet);
        goto clean;
    }
 
    printf("Sessao com o Dinamo estabelecida.\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("Falha na funcao: DImportKey \nCodigo de erro: %d\n",nRet);
        goto clean;
    }
 
    printf("Chave simetrica importada em texto claro.\n");
 
    //Exporta a chave simétrica.
    nRet = DExportKey(hKey, NULL, PLAINTEXTKEY_BLOB, 0, pbKey, &pbKeyLen);
    if(nRet){
        printf("Falha na funcao: DExportKey \nCodigo de erro: %d\n",nRet);
        goto clean;
    }
 
    printf("Chave simetrica exportada em texto claro.\n");
 
    clean:
    if (hKey){
        DDestroyKey(&hKey, REMOVE_FROM_HSM);
        printf("Chave removida com sucesso.\n");
    }
    if (hSession){
        DCloseSession(&hSession, 0);
        printf("Sessao encerrada.\n");
    }
 
    DFinalize();
    printf("Bibliotecas finalizadas.\n");
 
    return nRet;
}