зеркало из https://github.com/github/ruby.git
383 строки
8.1 KiB
C
383 строки
8.1 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_DSA)
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#include "ossl.h"
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#define GetPKeyDSA(obj, pkey) do { \
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GetPKey(obj, pkey); \
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if (EVP_PKEY_type(pkey->type) != EVP_PKEY_DSA) { /* PARANOIA? */ \
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ossl_raise(rb_eRuntimeError, "THIS IS NOT A DSA!"); \
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} \
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} while (0)
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#define DSA_HAS_PRIVATE(dsa) ((dsa)->priv_key)
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#ifdef OSSL_ENGINE_ENABLED
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# define DSA_PRIVATE(dsa) (DSA_HAS_PRIVATE(dsa) || (dsa)->engine)
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#else
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# define DSA_PRIVATE(dsa) DSA_HAS_PRIVATE(dsa)
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#endif
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/*
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* Classes
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*/
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VALUE cDSA;
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VALUE eDSAError;
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/*
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* Public
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*/
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static VALUE
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dsa_instance(VALUE klass, DSA *dsa)
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{
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EVP_PKEY *pkey;
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VALUE obj;
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if (!dsa) {
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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_DSA(pkey, dsa)) {
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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_dsa_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 = dsa_instance(cDSA, DSA_new());
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} else {
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if (EVP_PKEY_type(pkey->type) != EVP_PKEY_DSA) {
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ossl_raise(rb_eTypeError, "Not a DSA key!");
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}
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WrapPKey(cDSA, obj, pkey);
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}
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if (obj == Qfalse) {
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ossl_raise(eDSAError, 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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static DSA *
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dsa_generate(int size)
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{
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DSA *dsa;
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unsigned char seed[20];
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int seed_len = 20, counter;
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unsigned long h;
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if (!RAND_bytes(seed, seed_len)) {
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return 0;
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}
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dsa = DSA_generate_parameters(size, seed, seed_len, &counter, &h,
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rb_block_given_p() ? ossl_generate_cb : NULL,
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NULL);
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if(!dsa) return 0;
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if (!DSA_generate_key(dsa)) {
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DSA_free(dsa);
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return 0;
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}
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return dsa;
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}
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static VALUE
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ossl_dsa_s_generate(VALUE klass, VALUE size)
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{
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DSA *dsa = dsa_generate(FIX2INT(size)); /* err handled by dsa_instance */
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VALUE obj = dsa_instance(klass, dsa);
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if (obj == Qfalse) {
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DSA_free(dsa);
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ossl_raise(eDSAError, 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_dsa_initialize(int argc, VALUE *argv, VALUE self)
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{
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EVP_PKEY *pkey;
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DSA *dsa;
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BIO *in;
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char *passwd = NULL;
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VALUE arg, pass;
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GetPKey(self, pkey);
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rb_scan_args(argc, argv, "11", &arg, &pass);
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if (FIXNUM_P(arg)) {
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if (!(dsa = dsa_generate(FIX2INT(arg)))) {
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ossl_raise(eDSAError, NULL);
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}
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}
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else {
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if (!NIL_P(pass)) passwd = StringValuePtr(pass);
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arg = ossl_to_der_if_possible(arg);
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in = ossl_obj2bio(arg);
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dsa = PEM_read_bio_DSAPrivateKey(in, NULL, ossl_pem_passwd_cb, passwd);
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if (!dsa) { BIO_reset(in);
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dsa = PEM_read_bio_DSAPublicKey(in, NULL, NULL, NULL);
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}
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if (!dsa) {
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BIO_reset(in);
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dsa = PEM_read_bio_DSA_PUBKEY(in, NULL, NULL, NULL);
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}
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if (!dsa) {
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BIO_reset(in);
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dsa = d2i_DSAPrivateKey_bio(in, NULL);
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}
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if (!dsa) {
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BIO_reset(in);
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dsa = d2i_DSA_PUBKEY_bio(in, NULL);
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}
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BIO_free(in);
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if (!dsa) ossl_raise(eDSAError, "Neither PUB key nor PRIV key:");
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}
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if (!EVP_PKEY_assign_DSA(pkey, dsa)) {
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DSA_free(dsa);
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ossl_raise(eDSAError, 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_dsa_is_public(VALUE self)
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{
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EVP_PKEY *pkey;
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GetPKeyDSA(self, pkey);
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/*
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* Do we need to check dsap->dsa->public_pkey?
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* return Qtrue;
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*/
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return (pkey->pkey.dsa->pub_key) ? Qtrue : Qfalse;
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}
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static VALUE
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ossl_dsa_is_private(VALUE self)
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{
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EVP_PKEY *pkey;
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GetPKeyDSA(self, pkey);
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return (DSA_PRIVATE(pkey->pkey.dsa)) ? Qtrue : Qfalse;
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}
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static VALUE
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ossl_dsa_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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const EVP_CIPHER *ciph = NULL;
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char *passwd = NULL;
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VALUE cipher, pass, str;
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GetPKeyDSA(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(eDSAError, NULL);
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}
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if (DSA_HAS_PRIVATE(pkey->pkey.dsa)) {
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if (!PEM_write_bio_DSAPrivateKey(out, pkey->pkey.dsa, 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(eDSAError, NULL);
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}
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} else {
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if (!PEM_write_bio_DSAPublicKey(out, pkey->pkey.dsa)) {
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BIO_free(out);
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ossl_raise(eDSAError, NULL);
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}
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}
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str = ossl_membio2str(out);
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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_dsa_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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GetPKeyDSA(self, pkey);
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hash = rb_hash_new();
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rb_hash_aset(hash, rb_str_new2("p"), ossl_bn_new(pkey->pkey.dsa->p));
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rb_hash_aset(hash, rb_str_new2("q"), ossl_bn_new(pkey->pkey.dsa->q));
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rb_hash_aset(hash, rb_str_new2("g"), ossl_bn_new(pkey->pkey.dsa->g));
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rb_hash_aset(hash, rb_str_new2("pub_key"), ossl_bn_new(pkey->pkey.dsa->pub_key));
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rb_hash_aset(hash, rb_str_new2("priv_key"), ossl_bn_new(pkey->pkey.dsa->priv_key));
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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_dsa_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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VALUE str;
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GetPKeyDSA(self, pkey);
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if (!(out = BIO_new(BIO_s_mem()))) {
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ossl_raise(eDSAError, NULL);
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}
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if (!DSA_print(out, pkey->pkey.dsa, 0)) { /* offset = 0 */
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BIO_free(out);
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ossl_raise(eDSAError, NULL);
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}
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str = ossl_membio2str(out);
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return str;
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}
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/*
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* Makes new instance DSA PUBLIC_KEY from PRIVATE_KEY
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*/
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static VALUE
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ossl_dsa_to_public_key(VALUE self)
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{
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EVP_PKEY *pkey;
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DSA *dsa;
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VALUE obj;
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GetPKeyDSA(self, pkey);
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/* err check performed by dsa_instance */
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dsa = DSAPublicKey_dup(pkey->pkey.dsa);
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obj = dsa_instance(CLASS_OF(self), dsa);
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if (obj == Qfalse) {
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DSA_free(dsa);
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ossl_raise(eDSAError, NULL);
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}
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return obj;
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}
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#define ossl_dsa_buf_size(pkey) (DSA_size((pkey)->pkey.dsa)+16)
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static VALUE
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ossl_dsa_sign(VALUE self, VALUE data)
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{
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EVP_PKEY *pkey;
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int buf_len;
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VALUE str;
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GetPKeyDSA(self, pkey);
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StringValue(data);
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if (!DSA_PRIVATE(pkey->pkey.dsa)) {
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ossl_raise(eDSAError, "Private DSA key needed!");
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}
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str = rb_str_new(0, ossl_dsa_buf_size(pkey));
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if (!DSA_sign(0, RSTRING(data)->ptr, RSTRING(data)->len, RSTRING(str)->ptr,
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&buf_len, pkey->pkey.dsa)) { /* type is ignored (0) */
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ossl_raise(eDSAError, NULL);
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}
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RSTRING(str)->len = buf_len;
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RSTRING(str)->ptr[buf_len] = 0;
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return str;
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}
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static VALUE
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ossl_dsa_verify(VALUE self, VALUE digest, VALUE sig)
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{
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EVP_PKEY *pkey;
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int ret;
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GetPKeyDSA(self, pkey);
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StringValue(digest);
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StringValue(sig);
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/* type is ignored (0) */
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ret = DSA_verify(0, RSTRING(digest)->ptr, RSTRING(digest)->len,
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RSTRING(sig)->ptr, RSTRING(sig)->len, pkey->pkey.dsa);
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if (ret < 0) {
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ossl_raise(eDSAError, NULL);
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}
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else if (ret == 1) {
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return Qtrue;
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}
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return Qfalse;
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}
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/*
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* INIT
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*/
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void
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Init_ossl_dsa()
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{
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eDSAError = rb_define_class_under(mPKey, "DSAError", ePKeyError);
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cDSA = rb_define_class_under(mPKey, "DSA", cPKey);
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rb_define_singleton_method(cDSA, "generate", ossl_dsa_s_generate, 1);
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rb_define_method(cDSA, "initialize", ossl_dsa_initialize, -1);
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rb_define_method(cDSA, "public?", ossl_dsa_is_public, 0);
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rb_define_method(cDSA, "private?", ossl_dsa_is_private, 0);
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rb_define_method(cDSA, "to_text", ossl_dsa_to_text, 0);
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rb_define_method(cDSA, "export", ossl_dsa_export, -1);
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rb_define_alias(cDSA, "to_pem", "export");
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rb_define_alias(cDSA, "to_s", "export");
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rb_define_method(cDSA, "public_key", ossl_dsa_to_public_key, 0);
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rb_define_method(cDSA, "syssign", ossl_dsa_sign, 1);
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rb_define_method(cDSA, "sysverify", ossl_dsa_verify, 2);
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rb_define_method(cDSA, "params", ossl_dsa_get_params, 0);
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}
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#else /* defined NO_DSA */
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# warning >>> OpenSSL is compiled without DSA support <<<
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void
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Init_ossl_dsa()
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{
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rb_warning("OpenSSL is compiled without DSA support");
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}
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#endif /* NO_DSA */
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