How to set "e" in RSA structure ?

Richard Levitte levitte at openssl.org
Wed Jul 10 11:18:30 UTC 2019


RSA_set0_key() is the function you should use.

For more information, do 'man RSA_set0_key', or have a look here:

https://www.openssl.org/docs/man1.1.0/man3/RSA_set0_key.html

Cheers,
Richard

On Wed, 10 Jul 2019 11:51:01 +0200,
Swamy J-S wrote:
> 
> 
> Recently i upgraded openssl from 1.0.2 to 1.1.0. As RSA structure is opaque in new opnessl i made
> some modifications in my code as follows :
> 
> Old Code
> 
> RSA* rsa = EVP_PKEY_get1_RSA(PKey);
> 
> if(NULL != rsa)
> 
> {
> 
> if(!BN_set_word(rsa->e, 65537) || !EVP_PKEY_set1_RSA(PKey, rsa))
> 
> --------------------------------------------------------------------------------------------------
> 
> New Code
> 
> RSA* rsa = EVP_PKEY_get1_RSA(PKey);
> 
> BIGNUM *e_new = BN_new();
> 
> if(NULL != rsa)
> 
> {
> 
> if(!BN_set_word(e_new, 65537) || !EVP_PKEY_set1_RSA(PKey, rsa))
> 
> But Now "e" variable is not set in 'rsa', So how to set "e" inside rsa? Pls suggest me
> corresponding API
> 
> Thanks and Regards,
> 
> SWAMY J S
> 
> 
-- 
Richard Levitte         levitte at openssl.org
OpenSSL Project         http://www.openssl.org/~levitte/


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