RSA_generate_key - generate RSA key pair
#include <openssl/rsa.h> int RSA_generate_key_ex(RSA *rsa, int bits, BIGNUM *e, BN_GENCB *cb); Deprecated: RSA *RSA_generate_key(int num, unsigned long e, void (*callback)(int,int,void *), void *cb_arg);
OpenSSL RSA_generate_key(3openssl) NAME RSA_generate_key_ex, RSA_generate_key - generate RSA key pair SYNOPSIS #include <openssl/rsa.h> int RSA_generate_key_ex(RSA *rsa, int bits, BIGNUM *e, BN_GENCB *cb); Deprecated: RSA *RSA_generate_key(int num, unsigned long e, void (*callback)(int,int,void *), void *cb_arg); DESCRIPTION RSA_generate_key_ex() generates a key pair and stores it in the RSA structure provided in rsa. The pseudo-random number generator must be seeded prior to calling RSA_generate_key_ex(). The modulus size will be of length bits, and the public exponent will be e. Key sizes with num < 1024 should be considered insecure. The exponent is an odd number, typically 3, 17 or 65537. A callback function may be used to provide feedback about the progress of the key generation. If cb is not NULL, it will be called as follows using the BN_GENCB_call() function described on the BN_generate_prime(3) page. o While a random prime number is generated, it is called as described in BN_generate_prime(3). o When the n-th randomly generated prime is rejected as not suitable for the key, BN_GENCB_call(cb, 2, n) is called. o When a random p has been found with p-1 relatively prime to e, it is called as BN_GENCB_call(cb, 3, 0). The process is then repeated for prime q with BN_GENCB_call(cb, 3, 1). RSA_generate_key is deprecated (new applications should use RSA_generate_key_ex instead). RSA_generate_key works in the same way as RSA_generate_key_ex except it uses "old style" call backs. See BN_generate_prime(3) for further details. RETURN VALUE If key generation fails, RSA_generate_key() returns NULL. The error codes can be obtained by ERR_get_error(3). BUGS BN_GENCB_call(cb, 2, x) is used with two different meanings. RSA_generate_key() goes into an infinite loop for illegal input values. ATTRIBUTES See attributes(7) for descriptions of the following attributes: +---------------+--------------------------+ |ATTRIBUTE TYPE | ATTRIBUTE VALUE | +---------------+--------------------------+ |Availability | library/security/openssl | +---------------+--------------------------+ |Stability | Pass-through uncommitted | +---------------+--------------------------+ SEE ALSO ERR_get_error(3), rand(3), rsa(3), RSA_free(3), BN_generate_prime(3) HISTORY The cb_arg argument was added in SSLeay 0.9.0. NOTES Source code for open source software components in Oracle Solaris can be found at https://www.oracle.com/downloads/opensource/solaris-source- code-downloads.html. This software was built from source available at https://github.com/oracle/solaris-userland. The original community source was downloaded from https://www.openssl.org/source/openssl-1.0.2ze.tar.gz. Further information about this software can be found on the open source community website at https://www.openssl.org/. 1.0.2ze 2022-05-03 RSA_generate_key(3openssl)