* ext/openssl: imported.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@4128 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

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 0000000000..9a6bec15eb
--- /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 */
+