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authorgotoyuzo <gotoyuzo@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2003-07-23 16:12:24 +0000
committergotoyuzo <gotoyuzo@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2003-07-23 16:12:24 +0000
commit231247c010acba191b78ed2d1310c935e63ad919 (patch)
tree10591a106bc2f3eff53eff8e440f58495ff517c9 /ext/openssl/ossl_pkey_dh.c
parentfd46a1da0a41b7939424bc5a393027be7940908e (diff)
* ext/openssl: imported.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@4128 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'ext/openssl/ossl_pkey_dh.c')
-rw-r--r--ext/openssl/ossl_pkey_dh.c386
1 files changed, 386 insertions, 0 deletions
diff --git a/ext/openssl/ossl_pkey_dh.c b/ext/openssl/ossl_pkey_dh.c
new file mode 100644
index 0000000..9a6bec1
--- /dev/null
+++ b/ext/openssl/ossl_pkey_dh.c
@@ -0,0 +1,386 @@
+/*
+ * $Id$
+ * 'OpenSSL for Ruby' project
+ * Copyright (C) 2001-2002 Michal Rokos <m.rokos@sh.cvut.cz>
+ * All rights reserved.
+ */
+/*
+ * This program is licenced under the same licence as Ruby.
+ * (See the file 'LICENCE'.)
+ */
+#if !defined(OPENSSL_NO_DH)
+
+#include "ossl.h"
+
+#define GetPKeyDH(obj, pkey) do { \
+ GetPKey(obj, pkey); \
+ if (EVP_PKEY_type(pkey->type) != EVP_PKEY_DH) { /* PARANOIA? */ \
+ ossl_raise(rb_eRuntimeError, "THIS IS NOT A DH!") ; \
+ } \
+} while (0)
+
+#define DH_PRIVATE(dh) ((dh)->priv_key)
+
+/*
+ * Classes
+ */
+VALUE cDH;
+VALUE eDHError;
+
+/*
+ * Public
+ */
+static VALUE
+dh_instance(VALUE klass, DH *dh)
+{
+ EVP_PKEY *pkey;
+ VALUE obj;
+
+ if (!dh) {
+ return Qfalse;
+ }
+ if (!(pkey = EVP_PKEY_new())) {
+ return Qfalse;
+ }
+ if (!EVP_PKEY_assign_DH(pkey, dh)) {
+ EVP_PKEY_free(pkey);
+ return Qfalse;
+ }
+ WrapPKey(klass, obj, pkey);
+
+ return obj;
+}
+
+VALUE
+ossl_dh_new(EVP_PKEY *pkey)
+{
+ VALUE obj;
+
+ if (!pkey) {
+ obj = dh_instance(cDH, DH_new());
+ } else {
+ if (EVP_PKEY_type(pkey->type) != EVP_PKEY_DH) {
+ ossl_raise(rb_eTypeError, "Not a DH key!");
+ }
+ WrapPKey(cDH, obj, pkey);
+ }
+ if (obj == Qfalse) {
+ ossl_raise(eDHError, NULL);
+ }
+
+ return obj;
+}
+
+/*
+ * Private
+ */
+/*
+ * CB for yielding when generating DH params
+ */
+static void
+ossl_dh_generate_cb(int p, int n, void *arg)
+{
+ VALUE ary;
+
+ ary = rb_ary_new2(2);
+ rb_ary_store(ary, 0, INT2NUM(p));
+ rb_ary_store(ary, 1, INT2NUM(n));
+
+ rb_yield(ary);
+}
+
+static DH *
+dh_generate(int size, int gen)
+{
+ DH *dh;
+ void (*cb)(int, int, void *) = NULL;
+
+ if (rb_block_given_p()) {
+ cb = ossl_dh_generate_cb;
+ }
+ /* arg to cb = NULL */
+ if (!(dh = DH_generate_parameters(size, gen, cb, NULL))) {
+ return 0;
+ }
+ if (!DH_generate_key(dh)) {
+ DH_free(dh);
+ return 0;
+ }
+
+ return dh;
+}
+
+static VALUE
+ossl_dh_s_generate(int argc, VALUE *argv, VALUE klass)
+{
+ DH *dh ;
+ int g = 2;
+ VALUE size, gen, obj;
+
+ if (rb_scan_args(argc, argv, "11", &size, &gen) == 2) {
+ g = FIX2INT(gen);
+ }
+ dh = dh_generate(FIX2INT(size), g);
+ obj = dh_instance(klass, dh);
+ if (obj == Qfalse) {
+ DH_free(dh);
+ ossl_raise(eDHError, NULL);
+ }
+
+ return obj;
+}
+
+static VALUE
+ossl_dh_initialize(int argc, VALUE *argv, VALUE self)
+{
+ EVP_PKEY *pkey;
+ DH *dh;
+ int g = 2;
+ BIO *in;
+ VALUE buffer, gen;
+
+ GetPKey(self, pkey);
+ rb_scan_args(argc, argv, "11", &buffer, &gen);
+ if (FIXNUM_P(buffer)) {
+ if (!NIL_P(gen)) {
+ g = FIX2INT(gen);
+ }
+ if (!(dh = dh_generate(FIX2INT(buffer), g))) {
+ ossl_raise(eDHError, NULL);
+ }
+ } else {
+ StringValue(buffer);
+ in = BIO_new_mem_buf(RSTRING(buffer)->ptr, RSTRING(buffer)->len);
+ if (!in){
+ ossl_raise(eDHError, NULL);
+ }
+ if (!(dh = PEM_read_bio_DHparams(in, NULL, NULL, NULL))) {
+ BIO_free(in);
+ ossl_raise(eDHError, NULL);
+ }
+ BIO_free(in);
+ }
+ if (!EVP_PKEY_assign_DH(pkey, dh)) {
+ DH_free(dh);
+ ossl_raise(eRSAError, NULL);
+ }
+ return self;
+}
+
+static VALUE
+ossl_dh_is_public(VALUE self)
+{
+ EVP_PKEY *pkey;
+
+ GetPKeyDH(self, pkey);
+ /*
+ * Do we need to check dhp->dh->public_pkey?
+ * return Qtrue;
+ */
+ return (pkey->pkey.dh->pub_key) ? Qtrue : Qfalse;
+}
+
+static VALUE
+ossl_dh_is_private(VALUE self)
+{
+ EVP_PKEY *pkey;
+
+ GetPKeyDH(self, pkey);
+
+ return (DH_PRIVATE(pkey->pkey.dh)) ? Qtrue : Qfalse;
+}
+
+static VALUE
+ossl_dh_export(VALUE self)
+{
+ EVP_PKEY *pkey;
+ BIO *out;
+ BUF_MEM *buf;
+ VALUE str;
+
+ GetPKeyDH(self, pkey);
+ if (!(out = BIO_new(BIO_s_mem()))) {
+ ossl_raise(eDHError, NULL);
+ }
+ if (!PEM_write_bio_DHparams(out, pkey->pkey.dh)) {
+ BIO_free(out);
+ ossl_raise(eDHError, NULL);
+ }
+ BIO_get_mem_ptr(out, &buf);
+ str = rb_str_new(buf->data, buf->length);
+ BIO_free(out);
+
+ return str;
+}
+
+/*
+ * Stores all parameters of key to the hash
+ * INSECURE: PRIVATE INFORMATIONS CAN LEAK OUT!!!
+ * Don't use :-)) (I's up to you)
+ */
+static VALUE
+ossl_dh_get_params(VALUE self)
+{
+ EVP_PKEY *pkey;
+ VALUE hash;
+
+ GetPKeyDH(self, pkey);
+
+ hash = rb_hash_new();
+
+ rb_hash_aset(hash, rb_str_new2("p"), ossl_bn_new(pkey->pkey.dh->p));
+ rb_hash_aset(hash, rb_str_new2("g"), ossl_bn_new(pkey->pkey.dh->g));
+ rb_hash_aset(hash, rb_str_new2("pub_key"), ossl_bn_new(pkey->pkey.dh->pub_key));
+ rb_hash_aset(hash, rb_str_new2("priv_key"), ossl_bn_new(pkey->pkey.dh->priv_key));
+
+ return hash;
+}
+
+/*
+ * Prints all parameters of key to buffer
+ * INSECURE: PRIVATE INFORMATIONS CAN LEAK OUT!!!
+ * Don't use :-)) (I's up to you)
+ */
+static VALUE
+ossl_dh_to_text(VALUE self)
+{
+ EVP_PKEY *pkey;
+ BIO *out;
+ BUF_MEM *buf;
+ VALUE str;
+
+ GetPKeyDH(self, pkey);
+ if (!(out = BIO_new(BIO_s_mem()))) {
+ ossl_raise(eDHError, NULL);
+ }
+ if (!DHparams_print(out, pkey->pkey.dh)) {
+ BIO_free(out);
+ ossl_raise(eDHError, NULL);
+ }
+ BIO_get_mem_ptr(out, &buf);
+ str = rb_str_new(buf->data, buf->length);
+ BIO_free(out);
+
+ return str;
+}
+
+/*
+ * Makes new instance DH PUBLIC_KEY from PRIVATE_KEY
+ */
+static VALUE
+ossl_dh_to_public_key(VALUE self)
+{
+ EVP_PKEY *pkey;
+ DH *dh;
+ VALUE obj;
+
+ GetPKeyDH(self, pkey);
+ dh = DHparams_dup(pkey->pkey.dh); /* err check perfomed by dh_instance */
+ obj = dh_instance(CLASS_OF(self), dh);
+ if (obj == Qfalse) {
+ DH_free(dh);
+ ossl_raise(eDHError, NULL);
+ }
+
+ return obj;
+}
+
+static VALUE
+ossl_dh_check_params(VALUE self)
+{
+ DH *dh;
+ EVP_PKEY *pkey;
+ int codes;
+
+ GetPKeyDH(self, pkey);
+ dh = pkey->pkey.dh;
+
+ if (!DH_check(dh, &codes)) {
+ return Qfalse;
+ }
+
+ return codes == 0 ? Qtrue : Qfalse;
+}
+
+static VALUE
+ossl_dh_generate_key(VALUE self)
+{
+ DH *dh;
+ EVP_PKEY *pkey;
+
+ GetPKeyDH(self, pkey);
+ dh = pkey->pkey.dh;
+
+ if (!DH_generate_key(dh))
+ ossl_raise(eDHError, "Failed to generate key");
+ return self;
+}
+
+static VALUE
+ossl_dh_compute_key(VALUE self, VALUE pub)
+{
+ DH *dh;
+ EVP_PKEY *pkey;
+ BIGNUM *pub_key;
+ VALUE str;
+ int len;
+ char *buf;
+
+ GetPKeyDH(self, pkey);
+ dh = pkey->pkey.dh;
+ pub_key = GetBNPtr(pub);
+
+ len = DH_size(dh);
+ if (!(buf = OPENSSL_malloc(len))) {
+ ossl_raise(eDHError, "Cannot allocate mem for shared secret");
+ }
+
+ if ((len = DH_compute_key(buf, pub_key, dh)) < 0) {
+ OPENSSL_free(buf);
+ ossl_raise(eDHError, NULL);
+ }
+
+ str = rb_str_new(buf, len);
+ OPENSSL_free(buf);
+
+ return str;
+}
+
+/*
+ * INIT
+ */
+void
+Init_ossl_dh()
+{
+ eDHError = rb_define_class_under(mPKey, "DHError", ePKeyError);
+
+ cDH = rb_define_class_under(mPKey, "DH", cPKey);
+
+ rb_define_singleton_method(cDH, "generate", ossl_dh_s_generate, -1);
+ rb_define_method(cDH, "initialize", ossl_dh_initialize, -1);
+
+ rb_define_method(cDH, "public?", ossl_dh_is_public, 0);
+ rb_define_method(cDH, "private?", ossl_dh_is_private, 0);
+ rb_define_method(cDH, "to_text", ossl_dh_to_text, 0);
+ rb_define_method(cDH, "export", ossl_dh_export, 0);
+ rb_define_alias(cDH, "to_pem", "export");
+ rb_define_alias(cDH, "to_s", "export");
+ rb_define_method(cDH, "public_key", ossl_dh_to_public_key, 0);
+
+ rb_define_method(cDH, "params_ok?", ossl_dh_check_params, 0);
+ rb_define_method(cDH, "generate_key!", ossl_dh_generate_key, 0);
+ rb_define_method(cDH, "compute_key", ossl_dh_compute_key, 1);
+
+ rb_define_method(cDH, "params", ossl_dh_get_params, 0);
+}
+
+#else /* defined NO_DH */
+# warning >>> OpenSSL is compiled without DH support <<<
+
+void
+Init_ossl_dh()
+{
+ rb_warning("OpenSSL is compiled without DH support");
+}
+#endif /* NO_DH */
+