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("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");
 
    //Cria um contexto de hash
    nRet = DCreateHash(hSession, HASH_ID, 0, 0, &hHash);
 
    if (nRet){
        printf("Function failure: DCreateHash \nError code: %d\n",nRet);
        goto clean;
    }
 
    printf("Hash context created.\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("Function failure: DHashData \nError code: %d\n",nRet);
        goto clean;
    }
 
    printf("Data added to hash.\n");
 
    cbData = sizeof(dwAlgId);
    nRet = DGetHashParam(hHash,  DHP_ALGID,(BYTE *)&dwAlgId, &cbData, 0);
 
    if (nRet){
        printf("Function failed: DGetHashParam \nError code: %d\n",nRet);
        goto clean;
    }
 
    printf("Hash algorithm used: "DWORD_PRINT"\n", dwAlgId);
 
    cbData = sizeof(dwHashSize);
    nRet = DGetHashParam(hHash,  DHP_HASH_SIZE,(BYTE *)&dwHashSize, &cbData, 0);
 
    if (nRet){
        printf("Function failed: DGetHashParam \nError code: %d\n",nRet);
        goto clean;
    }
 
    printf("Hash Size: "DWORD_PRINT"\n", dwHashSize);
 
    cbData = sizeof(pbHash);
    nRet = DGetHashParam(hHash,  DHP_HASH_VALUE, pbHash, &cbData, 0);
 
    if (nRet){
        printf("Function failed: DGetHashParam \nError code: %d\n",nRet);
        goto clean;
    }
 
    printf("Hash result: ");
 
    for (i = 0; i < (int)cbData; i++)
        printf("%02X ", pbHash[i]);
 
    printf("\n");
 
    clean:
 
    if (hHash){
        DDestroyHash(&hHash);
        printf("Hash context released.\n");
    }
 
    if (hSession){
        DCloseSession(&hSession, 0);
        printf("Session closed.\n");
    }
 
    DFinalize();
    printf("Libraries finished.\n");
 
    return nRet;
}