C

Generate an RSA Key and Save to Encrypted PEM

See more RSA Examples

Demonstrates how to generate an RSA key and save to an encrypted PEM file. C

#include <C_CkRsa.h>
#include <C_CkPrivateKey.h>
#include <C_CkPublicKey.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkRsa rsa;
    HCkPrivateKey privKey;
    const char *password;
    const char *path;
    HCkPublicKey pubKey;
    BOOL preferPkcs1;

    success = FALSE;

    rsa = CkRsa_Create();

    //  Generate a 2048-bit key.
    privKey = CkPrivateKey_Create();
    success = CkRsa_GenKey(rsa,2048,privKey);
    if (success == FALSE) {
        printf("%s\n",CkRsa_lastErrorText(rsa));
        CkRsa_Dispose(rsa);
        CkPrivateKey_Dispose(privKey);
        return;
    }

    password = "secret";
    //  Saving to a relative path (from the current working directory of the process).
    path = "rsaKeys/myTestRsaPrivate.pem";
    //  Encrypt the PEM using 256-bit AES encryption.
    CkPrivateKey_putPkcs8EncryptAlg(privKey,"aes256");
    success = CkPrivateKey_SavePkcs8EncryptedPemFile(privKey,password,path);
    if (success == FALSE) {
        printf("%s\n",CkPrivateKey_lastErrorText(privKey));
        CkRsa_Dispose(rsa);
        CkPrivateKey_Dispose(privKey);
        return;
    }

    //  

    //  We can also save the public key.
    //  There is no need to encrypt public keys.
    pubKey = CkPublicKey_Create();
    CkPrivateKey_ToPublicKey(privKey,pubKey);

    path = "rsaKeys/myTestRsaPublic.pem";
    //  Choose PKCS1 or PKCS8
    //  We'll choose PKCS8.
    preferPkcs1 = FALSE;
    success = CkPublicKey_SavePemFile(pubKey,preferPkcs1,path);
    if (success == FALSE) {
        printf("%s\n",CkPublicKey_lastErrorText(pubKey));
        CkRsa_Dispose(rsa);
        CkPrivateKey_Dispose(privKey);
        CkPublicKey_Dispose(pubKey);
        return;
    }

    //  

    printf("Success.\n");


    CkRsa_Dispose(rsa);
    CkPrivateKey_Dispose(privKey);
    CkPublicKey_Dispose(pubKey);

    }