Hi,
I am using the below code snippet and am able to do the encytption.
But I need to convert the encrypted format to Binary format inorder to pass
the encrypted key to a different system. Any one pls suggest how to do the
same ???
*Code snippet :*
**
*void** EncrCardPin(char *pin,char** *encpin)*
*{*
*unsigned char* encrypted = (unsigned char** *) malloc(256);*
**
**
*int** bufSize;*
*char *pubname="publkey.pem"**;*
**
*FILE *keyfile = NULL;*
*RSA* rsa= NULL;*
*FILE *test = NULL;*
*test=fopen(**"test.txt","wb"**);*
**
*printf(**"Opening the puclic key file: [%s]\n"**,pubname);*
*keyfile = fopen(pubname, **"r"**);*
**
*if** (!keyfile)*
*{*
*printf(**"error occured while reading public key file"**);*
**
*}*
*printf(**"Reading the public key block from: [%s] \n"**, pubname);*
*rsa = PEM_read_RSA_PUBKEY(keyfile, NULL, NULL, NULL);*
*if** (rsa == NULL)*
*{*
*printf(**"Badness has occured! Did not read public key file\n"**);*
**
*}*
*else*
*{*
*printf(**"Opened public key file OK!\n"**);*
*}*
*printf(**"Encrypting the message [%s] using public key \n"**,pin);*
*bufSize = RSA_public_encrypt(strlen(pin), (**unsigned char** *) pin,
encrypted, rsa, RSA_PKCS1_PADDING);*
*if** (bufSize == -1)*
*{*
*printf(**"Badness has occured! encryption failed\n"**);*
*RSA_free(rsa);*
**
*}*
*else*
*{*
*printf(**"Encrypted the message OK! \n"**);*
*//memcpy(encrypted,encpin,1500);*
*sprintf(encpin,**"%s"**,encrypted);*
*fprintf(test,**"%s"**,encpin);*
*printf(**"The buffersize is : [%d]\n ================"**,bufSize);*
*}*
*RSA_free(rsa);*
*fclose(keyfile);*
*fclose(test);*
**
*}*
On Thu, Mar 31, 2011 at 9:47 AM, Adrian D. Sacrez <adrian...@verifone.com>wrote:
> Hi,
>
> I need help on how to do RSA encryption using Openssl in C language. Is
> there a code snippet on how to do this?
> Also, how do I extract or get the key from RSA_generate_key_ex()? Is the
> key generated from this function a private/public key
>
> Thanks,
>
> Adrian
>
>
