On Mon August 2 2010, krishnamurthy santhanam wrote:
> Hi,
>
> i am new to OpenSSL..i have to use RSA_generate key function to generate
> key..below is the program and outcome..is this the way to generate key?
>
> #include<stdio.h>
> #include<openssl/rsa.h>
> #include<string.h>
> int main()
> {
> char *plain="Sample text"; //Sample text (plain text) to Encrypt/Decrypt
> char *ciphertext;
> printf("%s\n",plain);
> // Generate RSA key
> RSA *rsa1= RSA_generate_key(1024,65537,NULL,NULL);
> // RSA_size() will determine how much memory must be allocated for an
> if(rsa1==NULL) {
> printf("NO RSA!\n\n");
> ERR_load_crypto_strings();
> ERR_print_errors_fp(stdout);
> }
> else
> {
> printf("RSA OK!\n");
> }
> ciphertext = (char *)malloc(RSA_size(rsa1));
> printf("rsa key = %d\n",rsa1);
> printf("RSA size = %d\n",RSA_size(rsa1));
> RSA_free(rsa1);
> }
>
> $ gcc -o rsa1 rsa1.c -lcrypto
>
> Output
> ---------
> $ ./rsa1
> Sample text
> RSA OK!
> rsa key = 473608208
> RSA size = 128
>
Times 8 bits per octet == 1024 bits as requested.
>
> Please correct me if i am missing anything ..
>
Does your %d recognize a number that is 128 bytes long?
Mike
>
> kris
>
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