RSA_blinding_on3ssl
Protect the rsa operation from timing attacks
Usage
#include <openssl/rsa.h>The following functions have been deprecated since OpenSSL 3.0, and can be hidden entirely by defining OPENSSL_API_COMPAT with a suitable version value, see openssl_user_macros(7):
int RSA_blinding_on(RSA *rsa, BN_CTX *ctx);void RSA_blinding_off(RSA *rsa);
Overview
All of the functions described on this page are deprecated.
RSA is vulnerable to timing attacks. In a setup where attackers can measure the time of RSA decryption or signature operations, blinding must be used to protect the RSA operation from that attack.
RSA_blinding_on() turns blinding on for key rsa and generates a random blinding factor. ctx is NULL or a preallocated and initialized BN_CTX.
RSA_blinding_off() turns blinding off and frees the memory used for the blinding factor.
Return values
RSA_blinding_on() returns 1 on success, and 0 if an error occurred.
RSA_blinding_off() returns no value.
Releases
13 releases since Debian 3.0 (Woody); the text changed 12 times.