RSA_size3ssl
Get rsa modulus size or security bits
Usage
#include <openssl/rsa.h>int RSA_bits(const RSA *rsa);
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_size(const RSA *rsa);int RSA_security_bits(const RSA *rsa);
Overview
RSA_bits() returns the number of significant bits.
rsa and rsa->n must not be NULL.
The remaining functions described on this page are deprecated. Applications should instead use EVP_PKEY_get_size(3), EVP_PKEY_get_bits(3) and EVP_PKEY_get_security_bits(3).
RSA_size() returns the RSA modulus size in bytes. It can be used to determine how much memory must be allocated for an RSA encrypted value.
RSA_security_bits() returns the number of security bits of the given rsa key. See BN_security_bits(3).
Return values
RSA_bits() returns the number of bits in the key.
RSA_size() returns the size of modulus in bytes.
RSA_security_bits() returns the number of security bits.
Releases
13 releases since Debian 3.0 (Woody); the text changed 12 times.