gen_check_oath.c

Example of OTP generation/verification.

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_256
 
int main()
{
    int nRet = 0;
    struct AUTH_PWD authPwd;
    HSESSIONCTX hSession = NULL;
    HKEYCTX hKey = NULL;
 
    BYTE pbBlob[ISSUE_OATH_OUTPUT_MAX_BLOB_LEN] = {0};
    DWORD pdwBlobLen = sizeof(pbBlob);
 
    struct tag_ISSUE_OTP_BLOB pvParamBlob;
    DWORD dwParamBlobLen = 0;
 
    char szOTP[ISSUE_OATH_MAX_OTP_LEN+1]  = {0};
 
 
    //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 conexao 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");
 
    //Geração da chave AES
    nRet = DGenerateKey(hSession, KEY_ID, KEY_TYPE, EXPORTABLE_KEY, &hKey);
    if(nRet){
        printf("Falha na funcao: DGenerateKey \nCodigo de erro: %d\n", nRet);
        goto clean;
    }
 
    printf("Chave AES gerada com sucesso.\n");
 
 
    //Inicializa a estrutura do HOTP
    pvParamBlob.bSeedLen = ISSUE_OATH_SHA256_LEN;
    pvParamBlob.bTruncationOffset = ISSUE_OATH_DYN_TRUNC ;
 
    dwParamBlobLen = sizeof(pvParamBlob);
 
    //Gera a semente.
    nRet = DOATHIssueBlob(hSession,
                          KEY_ID,
                          ISSUE_OATH_GENERATE_HOTP,
                          &pvParamBlob,
                          dwParamBlobLen,
                          pbBlob,
                          &pdwBlobLen,
                          0);
    if(nRet){
        printf("Falha na funcao: DOATHIssueBlob \nCodigo de erro: %d\n", nRet);
        goto clean;
    }
 
    printf("Geracao da semente feita com sucesso.\n");
 
    //Gera o próximo OTP.
    nRet = DOATHGetNextOTP(hSession,
                          KEY_ID,
                          ISSUE_OATH_MAX_OTP_LEN,
                          pbBlob,
                          pdwBlobLen,
                          szOTP,
                          0);
    if(nRet){
        printf("Falha na funcao: DOATHGetNextOTP \nCodigo de erro: %d\n", nRet);
        goto clean;
    }
 
    printf("Proximo OTP gerado com sucesso.\n");
 
    //checa o OTP
    nRet = DOATHCheckOTP(hSession,
                          KEY_ID,
                          szOTP,
                          pbBlob,
                          &pdwBlobLen,
                          0);
    if(nRet){
        printf("Falha na funcao: DOATHCheckOTP \nCodigo de erro: %d\n", nRet);
        goto clean;
    }
 
    printf("Valor OTP verificado com sucesso.\n");
 
    clean:
    if(hKey){
        //Remove a chave AES
        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;
}