m_of_n.c

Example of M of N.

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"
 
int main()
{
    int nRet = 0;
    struct AUTH_PWD authPwd;
    HSESSIONCTX hSession = NULL;
    DN_M_OF_N_SPLIT_INFO    stSplitInfo = {};
 
    BYTE secret[DN_M_OF_N_S_LEN] = {};
 
    //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");
 
    /*
        Initializes the structure for connecting to the HSM using a
        anonymous session.
    */
    strncpy(authPwd. szAddr, HOST_ADDR, sizeof(authPwd.szAddr));
    authPwd. nPort = DEFAULT_PORT;
 
    nRet = DOpenSession(&hSession, SS_ANONYMOUS,(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");
 
    /*
        It divides the secret into an M of N scheme, where there is a set of
        6 parts and 2 parts are needed to rebuild the secret.
 
        In this case, as NULL was passed in the secret parameter, the secret is
        randomly generated within the HSM.
    */
    nRet = DMofNSplit(hSession, 2, 6, NULL, 0, &stSplitInfo, 0);
    if (nRet)
    {
        printf("\nFunction failure: DMofNSplit\nError code: %d\n\n", nRet);
        goto clean;
    }
    printf("Secret of M from N split successfully.\n");
 
    nRet = DMofNRecover(hSession, stSplitInfo. pstParts, stSplitInfo. dwPartCount, secret, 0);
    if (nRet)
    {
        printf("\nFunction failure: DMofNRecover\nError code: %d\n\n", nRet);
        goto clean;
    }
    printf("Secret of M of N successfully retrieved.\n");
 
    clean:
 
    if (hSession) {
        DCloseSession(&hSession, 0);
        printf("Session closed.\n");
    }
 
    DFinalize();
    printf("Libraries finished.\n");
 
    return nRet;
}