RSA_new(3openssl) OpenSSL RSA_new(3openssl)NAME
RSA_new, RSA_free - allocate and free RSA objects
SYNOPSIS
#include <openssl/rsa.h>
RSA * RSA_new(void);
void RSA_free(RSA *rsa);
DESCRIPTION
RSA_new() allocates and initializes an RSA structure. It is equivalent to calling RSA_new_method(NULL).
RSA_free() frees the RSA structure and its components. The key is erased before the memory is returned to the system.
RETURN VALUES
If the allocation fails, RSA_new() returns NULL and sets an error code that can be obtained by ERR_get_error(3). Otherwise it returns a
pointer to the newly allocated structure.
RSA_free() returns no value.
SEE ALSO ERR_get_error(3), rsa(3), RSA_generate_key(3), RSA_new_method(3)HISTORY
RSA_new() and RSA_free() are available in all versions of SSLeay and OpenSSL.
OpenSSL-0.9.8 Oct 11 2005 RSA_new(3openssl)
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RSA_generate_key(3openssl) OpenSSL RSA_generate_key(3openssl)NAME
RSA_generate_key - generate RSA key pair
SYNOPSIS
#include <openssl/rsa.h>
RSA *RSA_generate_key(int num, unsigned long e,
void (*callback)(int,int,void *), void *cb_arg);
DESCRIPTION
RSA_generate_key() generates a key pair and returns it in a newly allocated RSA structure. The pseudo-random number generator must be
seeded prior to calling RSA_generate_key().
The modulus size will be num bits, and the public exponent will be e. Key sizes with num < 1024 should be considered insecure. The expo-
nent 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 callback is not NULL, it will be called as
follows:
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, callback(2, n, cb_arg) is called.
o When a random p has been found with p-1 relatively prime to e, it is called as callback(3, 0, cb_arg).
The process is then repeated for prime q with callback(3, 1, cb_arg).
RETURN VALUE
If key generation fails, RSA_generate_key() returns NULL; the error codes can be obtained by ERR_get_error(3).
BUGS
callback(2, x, cb_arg) is used with two different meanings.
RSA_generate_key() goes into an infinite loop for illegal input values.
SEE ALSO ERR_get_error(3), rand(3), rsa(3), RSA_free(3)HISTORY
The cb_arg argument was added in SSLeay 0.9.0.
OpenSSL-0.9.8 Oct 11 2005 RSA_generate_key(3openssl)