Method: OpenSSL::PKey::RSA#initialize

Defined in:

ossl_pkey_rsa.c

#new(key_size) ⇒ Object #new(encoded_key) ⇒ Object #new(encoded_key, pass_phrase) ⇒ Object

Generates or loads an RSA keypair. If an integer key_size is given it represents the desired key size. Keys less than 1024 bits should be considered insecure.

A key can instead be loaded from an encoded_key which must be PEM or DER encoded. A pass_phrase can be used to decrypt the key. If none is given OpenSSL will prompt for the pass phrase.

Examples

OpenSSL::PKey::RSA.new 2048
OpenSSL::PKey::RSA.new File.read 'rsa.pem'
OpenSSL::PKey::RSA.new File.read('rsa.pem'), 'my pass phrase'

# File 'ossl_pkey_rsa.c', line 220

static VALUE
ossl_rsa_initialize(int argc, VALUE *argv, VALUE self)
{
    EVP_PKEY *pkey;
    RSA *rsa;
    BIO *in;
    VALUE arg, pass;

    GetPKey(self, pkey);
    if(rb_scan_args(argc, argv, "02", &arg, &pass) == 0) {
	rsa = RSA_new();
    }
    else if (RB_INTEGER_TYPE_P(arg)) {
	rsa = rsa_generate(NUM2INT(arg), NIL_P(pass) ? RSA_F4 : NUM2ULONG(pass));
	if (!rsa) ossl_raise(eRSAError, NULL);
    }
    else {
	pass = ossl_pem_passwd_value(pass);
	arg = ossl_to_der_if_possible(arg);
	in = ossl_obj2bio(&arg);
	rsa = PEM_read_bio_RSAPrivateKey(in, NULL, ossl_pem_passwd_cb, (void *)pass);
	if (!rsa) {
	    OSSL_BIO_reset(in);
	    rsa = PEM_read_bio_RSA_PUBKEY(in, NULL, NULL, NULL);
	}
	if (!rsa) {
	    OSSL_BIO_reset(in);
	    rsa = d2i_RSAPrivateKey_bio(in, NULL);
	}
	if (!rsa) {
	    OSSL_BIO_reset(in);
	    rsa = d2i_RSA_PUBKEY_bio(in, NULL);
	}
	if (!rsa) {
	    OSSL_BIO_reset(in);
	    rsa = PEM_read_bio_RSAPublicKey(in, NULL, NULL, NULL);
	}
	if (!rsa) {
	    OSSL_BIO_reset(in);
	    rsa = d2i_RSAPublicKey_bio(in, NULL);
	}
	BIO_free(in);
	if (!rsa) {
	    ossl_raise(eRSAError, "Neither PUB key nor PRIV key");
	}
    }
    if (!EVP_PKEY_assign_RSA(pkey, rsa)) {
	RSA_free(rsa);
	ossl_raise(eRSAError, NULL);
    }

    return self;
}