ckd_bchain_ed25519.c

Example of Child Key Derivation (CKD) operation for Ed25519 keys using DBchainCreateCkd.

See Note on examples.

//#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
#include "dinamo.h" /* header do Dinamo */
 
#define HOST_ADDR       "127.0.0.1"
#define USER_ID         "master"
#define USER_PWD        "12345678"
 
int main()
{
    int nRet = 0;
    struct AUTH_PWD authPwd;
    HSESSIONCTX hSession = NULL;
 
    char szId[] = "Ed25519_Parent_Key";
    char szDest[MAX_OBJ_ID_FQN_LEN] = "Ed25519_Child_Key";
    DN_BCHAIN_BIP32_ED25519_CKD_IN_INFO stCkdInInfo;
    DN_BCHAIN_KEY_INFO stKeyInfo;
 
    BYTE pbAddress[DN_BCHAIN_MAX_ADDR_LEN] = {0};
    DWORD pdwAddressLen = sizeof(pbAddress);
 
    //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");
 
    //Criacao da chave Ed25519 XPrv (usando BIP32 testnet version).
    BYTE bVer = DN_BCHAIN_VER_BIP32_TESTNET;
    nRet = DBchainCreateXPrv(hSession,
                             DN_BCHAIN_BIP32_ED25519_XPRV,
                             BCHAIN_KEY,
                             szId,
                             &bVer,
                             sizeof(bVer),
                             0);
    if(nRet){
        printf("Falha na funcao: DBchainCreateXPrv \nCodigo de erro: %d\n", nRet);
        goto clean;
    }
 
    printf("Chave Ed25519 XPrv criada com sucesso.\n");
 
    //Preparacao da estrutura para Child Key Derivation.
    memset(&stCkdInInfo, 0, sizeof(stCkdInInfo));
    stCkdInInfo.bCkdType = DN_BCHAIN_BIP32_Ed_KDT_SLIP10;
    stCkdInInfo.stBaseInfo.dwIndex = DN_BCHAIN_SECURE_BIP32_INDEX_BASE + 0; // Hardened index: 2^31 + 0
    stCkdInInfo.stBaseInfo.dwAttributes = BCHAIN_KEY;
    stCkdInInfo.stBaseInfo.bVersion = DN_BCHAIN_VER_BIP32_TESTNET;
    strncpy(stCkdInInfo.stBaseInfo.szPar, szId, sizeof(stCkdInInfo.stBaseInfo.szPar));
    strncpy(stCkdInInfo.stBaseInfo.szDst, szDest, sizeof(stCkdInInfo.stBaseInfo.szDst));
 
    //Operação de Child Key Derivation para Ed25519.
    memset(&stKeyInfo, 0, sizeof(stKeyInfo));
    nRet = DBchainCreateCkd(hSession,
                            DN_BCHAIN_CKD_OPT_BIP32_ED25519_XPRV,
                            (const BYTE *)&stCkdInInfo,
                            (BYTE *)&stKeyInfo,
                            0);
    if(nRet){
        printf("Falha na funcao: DBchainCreateCkd \nCodigo de erro: %d\n", nRet);
        goto clean;
    }
 
    printf("Child Key Derivation para Ed25519 feita com sucesso.\n");
    printf("  - Tipo de storage: %d\n", stKeyInfo.bStorageType);
    printf("  - Tipo de chave: %d\n", stKeyInfo.dwType);
    printf("  - Profundidade BIP32: %d\n", stKeyInfo.bBip32Depth);
 
    //Recupera o endereço da chave derivada (Solana usa Ed25519).
    nRet = DBchainGetAddress(hSession,
                             DN_BCHAIN_AT_SOL,
                             DN_BCHAIN_VER_UNUSED,
                             DN_BCHAIN_HRP_UNUSED,
                             szDest,
                             pbAddress,
                             &pdwAddressLen,
                             0);
    if(nRet){
        printf("Falha na funcao: DBchainGetAddress \nCodigo de erro: %d\n", nRet);
        goto clean;
    }
 
    printf("Endereco Solana da chave derivada recuperado com sucesso: %s\n", pbAddress);
 
 
    //Remoção da chave pai.
    nRet = DRemoveObj(hSession, szId);
    if(nRet){
        printf("Falha na funcao: DRemoveObj \nCodigo de erro: %d\n", nRet);
        goto clean;
    }
    printf("Chave pai Ed25519 removida do HSM.\n");
 
 
    //Remoção da Child Key.
    nRet = DRemoveObj(hSession, szDest);
    if(nRet){
        printf("Falha na funcao: DRemoveObj \nCodigo de erro: %d\n", nRet);
        goto clean;
    }
    printf("Child Key Ed25519 removida do HSM.\n");
 
    clean:
    if (hSession) {
        DCloseSession(&hSession, 0);
        printf("Sessao encerrada.\n");
    }
 
    DFinalize();
    printf("Bibliotecas finalizadas.\n");
 
    return nRet;
}