create_hash.c

Example of generating a hash.

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 HASH_ID         ALG_SHA1
 
int main()
{
    int nRet;
    struct AUTH_PWD authPwd;
    HSESSIONCTX hSession = NULL;
    HHASHCTX hHash = NULL;
    BYTE pbData[256], pbHash[20];
    DWORD cbData, dwAlgId, dwHashSize;
    int i;
 
    //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");
 
    //Cria um contexto de hash
    nRet = DCreateHash(hSession, HASH_ID, 0, 0, &hHash);
 
    if (nRet){
        printf("Falha na funcao: DCreateHash \nCodigo de erro: %d\n",nRet);
        goto clean;
    }
 
    printf("Contexto de hash criado.\n");
 
    //Preenche o buffer com dados quaisquer
    cbData = sizeof(pbData);
 
    memset(pbData, 'A', cbData);
 
    //Adiciona dados ao hash
 
    nRet = DHashData(hHash, pbData, cbData, 0);
 
    if (nRet){
        printf("Falha na funcao: DHashData \nCodigo de erro: %d\n",nRet);
        goto clean;
    }
 
    printf("Dados adicionados ao hash.\n");
 
    cbData = sizeof(dwAlgId);
    nRet = DGetHashParam(hHash, DHP_ALGID, (BYTE *)&dwAlgId, &cbData, 0);
 
    if (nRet){
        printf("Falha na funcao: DGetHashParam \nCodigo de erro: %d\n",nRet);
        goto clean;
    }
 
    printf("Algoritmo de hash usado: "DWORD_PRINT"\n", dwAlgId);
 
    cbData = sizeof(dwHashSize);
    nRet = DGetHashParam(hHash, DHP_HASH_SIZE, (BYTE *)&dwHashSize, &cbData, 0);
 
    if (nRet){
        printf("Falha na funcao: DGetHashParam \nCodigo de erro: %d\n",nRet);
        goto clean;
    }
 
    printf("Tamanho do Hash: "DWORD_PRINT"\n", dwHashSize);
 
    cbData = sizeof(pbHash);
    nRet = DGetHashParam(hHash, DHP_HASH_VALUE, pbHash, &cbData, 0);
 
    if (nRet){
        printf("Falha na funcao: DGetHashParam \nCodigo de erro: %d\n",nRet);
        goto clean;
    }
 
    printf("Resultado do hash: ");
 
    for (i = 0; i < (int)cbData; i++)
        printf("%02X ", pbHash[i]);
 
    printf("\n");
 
    clean:
 
    if (hHash){
        DDestroyHash(&hHash);
        printf("Contexto de hash liberado.\n");
    }
 
    if (hSession){
        DCloseSession(&hSession, 0);
        printf("Sessao encerrada.\n");
    }
 
    DFinalize();
    printf("Bibliotecas finalizada.\n");
 
    return nRet;
}