516 lines
11 KiB
C
516 lines
11 KiB
C
/*
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* $Id$
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* 'OpenSSL for Ruby' project
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* Copyright (C) 2001-2002 Michal Rokos <m.rokos@sh.cvut.cz>
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* All rights reserved.
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*/
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/*
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* This program is licenced under the same licence as Ruby.
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* (See the file 'LICENCE'.)
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*/
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#if !defined(OPENSSL_NO_RSA)
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#include "ossl.h"
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#define GetPKeyRSA(obj, pkey) do { \
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GetPKey(obj, pkey); \
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if (EVP_PKEY_type(pkey->type) != EVP_PKEY_RSA) { /* PARANOIA? */ \
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ossl_raise(rb_eRuntimeError, "THIS IS NOT A RSA!") ; \
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} \
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} while (0)
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#define RSA_PRIVATE(rsa) ((rsa)->p && (rsa)->q)
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/*
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* Classes
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*/
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VALUE cRSA;
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VALUE eRSAError;
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/*
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* Public
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*/
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static VALUE
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rsa_instance(VALUE klass, RSA *rsa)
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{
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EVP_PKEY *pkey;
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VALUE obj;
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if (!rsa) {
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return Qfalse;
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}
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if (!(pkey = EVP_PKEY_new())) {
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return Qfalse;
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}
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if (!EVP_PKEY_assign_RSA(pkey, rsa)) {
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EVP_PKEY_free(pkey);
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return Qfalse;
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}
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WrapPKey(klass, obj, pkey);
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return obj;
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}
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VALUE
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ossl_rsa_new(EVP_PKEY *pkey)
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{
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VALUE obj;
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if (!pkey) {
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obj = rsa_instance(cRSA, RSA_new());
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}
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else {
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if (EVP_PKEY_type(pkey->type) != EVP_PKEY_RSA) {
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ossl_raise(rb_eTypeError, "Not a RSA key!");
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}
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WrapPKey(cRSA, obj, pkey);
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}
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if (obj == Qfalse) {
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ossl_raise(eRSAError, NULL);
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}
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return obj;
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}
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/*
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* Private
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*/
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/*
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* CB for yielding when generating RSA data
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*/
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static void
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ossl_rsa_generate_cb(int p, int n, void *arg)
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{
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VALUE ary;
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ary = rb_ary_new2(2);
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rb_ary_store(ary, 0, INT2NUM(p));
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rb_ary_store(ary, 1, INT2NUM(n));
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rb_yield(ary);
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}
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static RSA *
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rsa_generate(int size, int exp)
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{
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void (*cb)(int, int, void *) = NULL;
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if (rb_block_given_p()) {
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cb = ossl_rsa_generate_cb;
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}
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return RSA_generate_key(size, exp, cb, NULL);
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}
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static VALUE
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ossl_rsa_s_generate(int argc, VALUE *argv, VALUE klass)
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{
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RSA *rsa;
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VALUE size, exp;
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VALUE obj;
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rb_scan_args(argc, argv, "11", &size, &exp);
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rsa = rsa_generate(NUM2INT(size), NIL_P(exp) ? RSA_F4 : NUM2INT(exp)); /* err handled by rsa_instance */
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obj = rsa_instance(klass, rsa);
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if (obj == Qfalse) {
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RSA_free(rsa);
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ossl_raise(eRSAError, NULL);
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}
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return obj;
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}
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static VALUE
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ossl_rsa_initialize(int argc, VALUE *argv, VALUE self)
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{
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EVP_PKEY *pkey;
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RSA *rsa;
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BIO *in;
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char *passwd = NULL;
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VALUE buffer, pass;
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GetPKey(self, pkey);
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rb_scan_args(argc, argv, "11", &buffer, &pass);
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if (FIXNUM_P(buffer)) {
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rsa = rsa_generate(FIX2INT(buffer), NIL_P(pass) ? RSA_F4 : NUM2INT(pass));
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if (!rsa) {
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ossl_raise(eRSAError, NULL);
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}
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}
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else {
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StringValue(buffer);
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if (!NIL_P(pass)) {
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passwd = StringValuePtr(pass);
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}
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if (!(in = BIO_new_mem_buf(RSTRING(buffer)->ptr, RSTRING(buffer)->len))){
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ossl_raise(eRSAError, NULL);
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}
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rsa = PEM_read_bio_RSAPrivateKey(in, NULL, ossl_pem_passwd_cb, passwd);
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if (!rsa) {
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BIO_reset(in);
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rsa = PEM_read_bio_RSAPublicKey(in, NULL, NULL, NULL);
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}
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if (!rsa) {
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BIO_reset(in);
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rsa = PEM_read_bio_RSA_PUBKEY(in, NULL, NULL, NULL);
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}
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BIO_free(in);
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if (!rsa) {
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ossl_raise(eRSAError, "Neither PUB key nor PRIV key:");
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}
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}
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if (!EVP_PKEY_assign_RSA(pkey, rsa)) {
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RSA_free(rsa);
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ossl_raise(eRSAError, NULL);
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}
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return self;
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}
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static VALUE
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ossl_rsa_is_public(VALUE self)
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{
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EVP_PKEY *pkey;
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GetPKeyRSA(self, pkey);
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/*
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* SURPRISE! :-))
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* Every key is public at the same time!
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*/
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return Qtrue;
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}
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static VALUE
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ossl_rsa_is_private(VALUE self)
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{
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EVP_PKEY *pkey;
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GetPKeyRSA(self, pkey);
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return (RSA_PRIVATE(pkey->pkey.rsa)) ? Qtrue : Qfalse;
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}
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static VALUE
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ossl_rsa_export(int argc, VALUE *argv, VALUE self)
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{
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EVP_PKEY *pkey;
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BIO *out;
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BUF_MEM *buf;
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const EVP_CIPHER *ciph = NULL;
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char *passwd = NULL;
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VALUE cipher, pass, str;
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GetPKeyRSA(self, pkey);
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rb_scan_args(argc, argv, "02", &cipher, &pass);
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if (!NIL_P(cipher)) {
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ciph = GetCipherPtr(cipher);
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if (!NIL_P(pass)) {
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passwd = StringValuePtr(pass);
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}
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}
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if (!(out = BIO_new(BIO_s_mem()))) {
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ossl_raise(eRSAError, NULL);
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}
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if (RSA_PRIVATE(pkey->pkey.rsa)) {
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if (!PEM_write_bio_RSAPrivateKey(out, pkey->pkey.rsa, ciph,
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NULL, 0, ossl_pem_passwd_cb, passwd)) {
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BIO_free(out);
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ossl_raise(eRSAError, NULL);
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}
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} else {
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if (!PEM_write_bio_RSAPublicKey(out, pkey->pkey.rsa)) {
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BIO_free(out);
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ossl_raise(eRSAError, NULL);
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}
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}
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BIO_get_mem_ptr(out, &buf);
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str = rb_str_new(buf->data, buf->length);
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BIO_free(out);
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return str;
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}
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static VALUE
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ossl_rsa_public_encrypt(VALUE self, VALUE buffer)
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{
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EVP_PKEY *pkey;
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char *buf;
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int buf_len;
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VALUE str;
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GetPKeyRSA(self, pkey);
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StringValue(buffer);
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if (!(buf = OPENSSL_malloc(RSA_size(pkey->pkey.rsa) + 16))) {
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ossl_raise(eRSAError, NULL);
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}
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buf_len = RSA_public_encrypt(RSTRING(buffer)->len, RSTRING(buffer)->ptr,
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buf, pkey->pkey.rsa, RSA_PKCS1_PADDING);
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if (buf_len < 0){
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OPENSSL_free(buf);
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ossl_raise(eRSAError, NULL);
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}
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str = rb_str_new(buf, buf_len);
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OPENSSL_free(buf);
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return str;
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}
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static VALUE
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ossl_rsa_public_decrypt(VALUE self, VALUE buffer)
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{
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EVP_PKEY *pkey;
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char *buf;
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int buf_len;
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VALUE str;
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GetPKeyRSA(self, pkey);
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StringValue(buffer);
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if (!(buf = OPENSSL_malloc(RSA_size(pkey->pkey.rsa) + 16))) {
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ossl_raise(eRSAError, NULL);
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}
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buf_len = RSA_public_decrypt(RSTRING(buffer)->len, RSTRING(buffer)->ptr,
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buf, pkey->pkey.rsa, RSA_PKCS1_PADDING);
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if(buf_len < 0) {
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OPENSSL_free(buf);
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ossl_raise(eRSAError, NULL);
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}
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str = rb_str_new(buf, buf_len);
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OPENSSL_free(buf);
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return str;
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}
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static VALUE
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ossl_rsa_private_encrypt(VALUE self, VALUE buffer)
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{
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EVP_PKEY *pkey;
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char *buf;
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int buf_len;
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VALUE str;
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GetPKeyRSA(self, pkey);
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if (!RSA_PRIVATE(pkey->pkey.rsa)) {
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ossl_raise(eRSAError, "PRIVATE key needed for this operation!");
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}
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StringValue(buffer);
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if (!(buf = OPENSSL_malloc(RSA_size(pkey->pkey.rsa) + 16))) {
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ossl_raise(eRSAError, "Memory alloc error");
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}
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buf_len = RSA_private_encrypt(RSTRING(buffer)->len, RSTRING(buffer)->ptr,
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buf, pkey->pkey.rsa, RSA_PKCS1_PADDING);
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if (buf_len < 0){
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OPENSSL_free(buf);
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ossl_raise(eRSAError, NULL);
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}
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str = rb_str_new(buf, buf_len);
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OPENSSL_free(buf);
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return str;
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}
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static VALUE
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ossl_rsa_private_decrypt(VALUE self, VALUE buffer)
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{
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EVP_PKEY *pkey;
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char *buf;
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int buf_len;
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VALUE str;
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GetPKeyRSA(self, pkey);
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if (!RSA_PRIVATE(pkey->pkey.rsa)) {
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ossl_raise(eRSAError, "Private RSA key needed!");
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}
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StringValue(buffer);
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if (!(buf = OPENSSL_malloc(RSA_size(pkey->pkey.rsa) + 16))) {
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ossl_raise(eRSAError, "Memory alloc error");
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}
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buf_len = RSA_private_decrypt(RSTRING(buffer)->len, RSTRING(buffer)->ptr,
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buf, pkey->pkey.rsa, RSA_PKCS1_PADDING);
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if(buf_len < 0) {
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OPENSSL_free(buf);
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ossl_raise(eRSAError, NULL);
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}
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str = rb_str_new(buf, buf_len);
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OPENSSL_free(buf);
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return str;
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}
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/*
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* Stores all parameters of key to the hash
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* INSECURE: PRIVATE INFORMATIONS CAN LEAK OUT!!!
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* Don't use :-)) (I's up to you)
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*/
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static VALUE
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ossl_rsa_get_params(VALUE self)
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{
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EVP_PKEY *pkey;
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VALUE hash;
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GetPKeyRSA(self, pkey);
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hash = rb_hash_new();
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rb_hash_aset(hash, rb_str_new2("n"), ossl_bn_new(pkey->pkey.rsa->n));
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rb_hash_aset(hash, rb_str_new2("e"), ossl_bn_new(pkey->pkey.rsa->e));
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rb_hash_aset(hash, rb_str_new2("d"), ossl_bn_new(pkey->pkey.rsa->d));
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rb_hash_aset(hash, rb_str_new2("p"), ossl_bn_new(pkey->pkey.rsa->p));
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rb_hash_aset(hash, rb_str_new2("q"), ossl_bn_new(pkey->pkey.rsa->q));
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rb_hash_aset(hash, rb_str_new2("dmp1"), ossl_bn_new(pkey->pkey.rsa->dmp1));
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rb_hash_aset(hash, rb_str_new2("dmq1"), ossl_bn_new(pkey->pkey.rsa->dmq1));
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rb_hash_aset(hash, rb_str_new2("iqmp"), ossl_bn_new(pkey->pkey.rsa->iqmp));
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return hash;
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}
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/*
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* Prints all parameters of key to buffer
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* INSECURE: PRIVATE INFORMATIONS CAN LEAK OUT!!!
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* Don't use :-)) (I's up to you)
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*/
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static VALUE
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ossl_rsa_to_text(VALUE self)
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{
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EVP_PKEY *pkey;
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BIO *out;
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BUF_MEM *buf;
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VALUE str;
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GetPKeyRSA(self, pkey);
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if (!(out = BIO_new(BIO_s_mem()))) {
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ossl_raise(eRSAError, NULL);
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}
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if (!RSA_print(out, pkey->pkey.rsa, 0)) { //offset = 0
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BIO_free(out);
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ossl_raise(eRSAError, NULL);
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}
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BIO_get_mem_ptr(out, &buf);
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str = rb_str_new(buf->data, buf->length);
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BIO_free(out);
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return str;
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}
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/*
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* Makes new instance RSA PUBLIC_KEY from PRIVATE_KEY
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*/
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static VALUE
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ossl_rsa_to_public_key(VALUE self)
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{
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EVP_PKEY *pkey;
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RSA *rsa;
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VALUE obj;
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GetPKeyRSA(self, pkey);
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/* err check performed by rsa_instance */
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rsa = RSAPublicKey_dup(pkey->pkey.rsa);
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obj = rsa_instance(CLASS_OF(self), rsa);
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if (obj == Qfalse) {
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RSA_free(rsa);
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ossl_raise(eRSAError, NULL);
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}
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return obj;
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}
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/*
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* TODO: Test me
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extern BN_CTX *ossl_bn_ctx;
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static VALUE
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ossl_rsa_blinding_on(VALUE self)
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{
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EVP_PKEY *pkey;
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GetPKeyRSA(self, pkey);
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if (RSA_blinding_on(pkey->pkey.rsa, ossl_bn_ctx) != 1) {
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ossl_raise(eRSAError, NULL);
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}
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return self;
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}
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static VALUE
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ossl_rsa_blinding_off(VALUE self)
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{
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EVP_PKEY *pkey;
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GetPKeyRSA(self, pkey);
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RSA_blinding_off(pkey->pkey.rsa);
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return self;
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}
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*/
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OSSL_PKEY_BN(rsa, n);
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OSSL_PKEY_BN(rsa, e);
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OSSL_PKEY_BN(rsa, d);
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OSSL_PKEY_BN(rsa, p);
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OSSL_PKEY_BN(rsa, q);
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OSSL_PKEY_BN(rsa, dmp1);
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OSSL_PKEY_BN(rsa, dmq1);
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OSSL_PKEY_BN(rsa, iqmp);
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/*
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* INIT
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*/
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void
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Init_ossl_rsa()
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{
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eRSAError = rb_define_class_under(mPKey, "RSAError", ePKeyError);
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cRSA = rb_define_class_under(mPKey, "RSA", cPKey);
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rb_define_singleton_method(cRSA, "generate", ossl_rsa_s_generate, -1);
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rb_define_method(cRSA, "initialize", ossl_rsa_initialize, -1);
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rb_define_method(cRSA, "public?", ossl_rsa_is_public, 0);
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rb_define_method(cRSA, "private?", ossl_rsa_is_private, 0);
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rb_define_method(cRSA, "to_text", ossl_rsa_to_text, 0);
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rb_define_method(cRSA, "export", ossl_rsa_export, -1);
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rb_define_alias(cRSA, "to_pem", "export");
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rb_define_alias(cRSA, "to_s", "export");
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rb_define_method(cRSA, "public_key", ossl_rsa_to_public_key, 0);
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rb_define_method(cRSA, "public_encrypt", ossl_rsa_public_encrypt, 1);
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rb_define_method(cRSA, "public_decrypt", ossl_rsa_public_decrypt, 1);
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rb_define_method(cRSA, "private_encrypt", ossl_rsa_private_encrypt, 1);
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rb_define_method(cRSA, "private_decrypt", ossl_rsa_private_decrypt, 1);
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DEF_OSSL_PKEY_BN(cRSA, rsa, n);
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DEF_OSSL_PKEY_BN(cRSA, rsa, e);
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DEF_OSSL_PKEY_BN(cRSA, rsa, d);
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DEF_OSSL_PKEY_BN(cRSA, rsa, p);
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DEF_OSSL_PKEY_BN(cRSA, rsa, q);
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DEF_OSSL_PKEY_BN(cRSA, rsa, dmp1);
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DEF_OSSL_PKEY_BN(cRSA, rsa, dmq1);
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DEF_OSSL_PKEY_BN(cRSA, rsa, iqmp);
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rb_define_method(cRSA, "params", ossl_rsa_get_params, 0);
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/*
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* TODO: Test it
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rb_define_method(cRSA, "blinding_on!", ossl_rsa_blinding_on, 0);
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rb_define_method(cRSA, "blinding_off!", ossl_rsa_blinding_off, 0);
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*/
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}
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#else /* defined NO_RSA */
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# warning >>> OpenSSL is compiled without RSA support <<<
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void
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Init_ossl_rsa()
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{
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rb_warning("OpenSSL is compiled without RSA support");
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}
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#endif /* NO_RSA */
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