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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_dsa.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_dsa.c')
-rw-r--r--ext/openssl/ossl_pkey_dsa.c404
1 files changed, 404 insertions, 0 deletions
diff --git a/ext/openssl/ossl_pkey_dsa.c b/ext/openssl/ossl_pkey_dsa.c
new file mode 100644
index 0000000..73ab47b
--- /dev/null
+++ b/ext/openssl/ossl_pkey_dsa.c
@@ -0,0 +1,404 @@
+/*
+ * $Id$
+ * '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_DSA)
+
+#include "ossl.h"
+
+#define GetPKeyDSA(obj, pkey) do { \
+ GetPKey(obj, pkey); \
+ if (EVP_PKEY_type(pkey->type) != EVP_PKEY_DSA) { /* PARANOIA? */ \
+ ossl_raise(rb_eRuntimeError, "THIS IS NOT A DSA!"); \
+ } \
+} while (0)
+
+#define DSA_PRIVATE(dsa) ((dsa)->priv_key)
+
+/*
+ * Classes
+ */
+VALUE cDSA;
+VALUE eDSAError;
+
+/*
+ * Public
+ */
+static VALUE
+dsa_instance(VALUE klass, DSA *dsa)
+{
+ EVP_PKEY *pkey;
+ VALUE obj;
+
+ if (!dsa) {
+ return Qfalse;
+ }
+ if (!(pkey = EVP_PKEY_new())) {
+ return Qfalse;
+ }
+ if (!EVP_PKEY_assign_DSA(pkey, dsa)) {
+ EVP_PKEY_free(pkey);
+ return Qfalse;
+ }
+ WrapPKey(klass, obj, pkey);
+
+ return obj;
+}
+
+VALUE
+ossl_dsa_new(EVP_PKEY *pkey)
+{
+ VALUE obj;
+
+ if (!pkey) {
+ obj = dsa_instance(cDSA, DSA_new());
+ } else {
+ if (EVP_PKEY_type(pkey->type) != EVP_PKEY_DSA) {
+ ossl_raise(rb_eTypeError, "Not a DSA key!");
+ }
+ WrapPKey(cDSA, obj, pkey);
+ }
+ if (obj == Qfalse) {
+ ossl_raise(eDSAError, NULL);
+ }
+
+ return obj;
+}
+
+/*
+ * Private
+ */
+/*
+ * CB for yielding when generating DSA params
+ */
+static void
+ossl_dsa_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 DSA *
+dsa_generate(int size)
+{
+ DSA *dsa;
+ unsigned char seed[20];
+ int seed_len = 20, counter;
+ unsigned long h;
+ void (*cb)(int, int, void *) = NULL;
+
+ if (!RAND_bytes(seed, seed_len)) {
+ return 0;
+ }
+ if (rb_block_given_p()) {
+ cb = ossl_dsa_generate_cb;
+ }
+ dsa = DSA_generate_parameters(size, seed, seed_len, &counter, &h, cb, NULL);
+ if(!dsa) { /* arg to cb = NULL */
+ return 0;
+ }
+ if (!DSA_generate_key(dsa)) {
+ DSA_free(dsa);
+ return 0;
+ }
+
+ return dsa;
+}
+
+static VALUE
+ossl_dsa_s_generate(VALUE klass, VALUE size)
+{
+ DSA *dsa = dsa_generate(FIX2INT(size)); /* err handled by dsa_instance */
+ VALUE obj = dsa_instance(klass, dsa);
+
+ if (obj == Qfalse) {
+ DSA_free(dsa);
+ ossl_raise(eDSAError, NULL);
+ }
+
+ return obj;
+}
+
+static VALUE
+ossl_dsa_initialize(int argc, VALUE *argv, VALUE self)
+{
+ EVP_PKEY *pkey;
+ DSA *dsa;
+ BIO *in;
+ char *passwd = NULL;
+ VALUE buffer, pass;
+
+ GetPKey(self, pkey);
+ rb_scan_args(argc, argv, "11", &buffer, &pass);
+ if (FIXNUM_P(buffer)) {
+ if (!(dsa = dsa_generate(FIX2INT(buffer)))) {
+ ossl_raise(eDSAError, NULL);
+ }
+ } else {
+ StringValue(buffer);
+ if (!NIL_P(pass)) {
+ passwd = StringValuePtr(pass);
+ }
+ in = BIO_new_mem_buf(RSTRING(buffer)->ptr, RSTRING(buffer)->len);
+ if (!in){
+ ossl_raise(eDSAError, NULL);
+ }
+
+ dsa = PEM_read_bio_DSAPrivateKey(in, NULL, ossl_pem_passwd_cb, passwd);
+ if (!dsa) {
+ BIO_reset(in);
+
+ dsa = PEM_read_bio_DSAPublicKey(in, NULL, NULL, NULL);
+ }
+ if (!dsa) {
+ BIO_reset(in);
+
+ dsa = PEM_read_bio_DSA_PUBKEY(in, NULL, NULL, NULL);
+ }
+ if (!dsa) {
+ BIO_free(in);
+ ossl_raise(eDSAError, "Neither PUB key nor PRIV key:");
+ }
+ BIO_free(in);
+ }
+ if (!EVP_PKEY_assign_DSA(pkey, dsa)) {
+ DSA_free(dsa);
+ ossl_raise(eDSAError, NULL);
+ }
+
+ return self;
+}
+
+static VALUE
+ossl_dsa_is_public(VALUE self)
+{
+ EVP_PKEY *pkey;
+
+ GetPKeyDSA(self, pkey);
+
+ /*
+ * Do we need to check dsap->dsa->public_pkey?
+ * return Qtrue;
+ */
+ return (pkey->pkey.dsa->pub_key) ? Qtrue : Qfalse;
+}
+
+static VALUE
+ossl_dsa_is_private(VALUE self)
+{
+ EVP_PKEY *pkey;
+
+ GetPKeyDSA(self, pkey);
+
+ return (DSA_PRIVATE(pkey->pkey.dsa)) ? Qtrue : Qfalse;
+}
+
+static VALUE
+ossl_dsa_export(int argc, VALUE *argv, VALUE self)
+{
+ EVP_PKEY *pkey;
+ BIO *out;
+ BUF_MEM *buf;
+ const EVP_CIPHER *ciph = NULL;
+ char *passwd = NULL;
+ VALUE cipher, pass, str;
+
+ GetPKeyDSA(self, pkey);
+ rb_scan_args(argc, argv, "02", &cipher, &pass);
+ if (!NIL_P(cipher)) {
+ ciph = GetCipherPtr(cipher);
+ if (!NIL_P(pass)) {
+ passwd = StringValuePtr(pass);
+ }
+ }
+ if (!(out = BIO_new(BIO_s_mem()))) {
+ ossl_raise(eDSAError, NULL);
+ }
+ if (DSA_PRIVATE(pkey->pkey.dsa)) {
+ if (!PEM_write_bio_DSAPrivateKey(out, pkey->pkey.dsa, ciph,
+ NULL, 0, ossl_pem_passwd_cb, passwd)){
+ BIO_free(out);
+ ossl_raise(eDSAError, NULL);
+ }
+ } else {
+ if (!PEM_write_bio_DSAPublicKey(out, pkey->pkey.dsa)) {
+ BIO_free(out);
+ ossl_raise(eDSAError, 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_dsa_get_params(VALUE self)
+{
+ EVP_PKEY *pkey;
+ VALUE hash;
+
+ GetPKeyDSA(self, pkey);
+
+ hash = rb_hash_new();
+
+ rb_hash_aset(hash, rb_str_new2("p"), ossl_bn_new(pkey->pkey.dsa->p));
+ rb_hash_aset(hash, rb_str_new2("q"), ossl_bn_new(pkey->pkey.dsa->q));
+ rb_hash_aset(hash, rb_str_new2("g"), ossl_bn_new(pkey->pkey.dsa->g));
+ rb_hash_aset(hash, rb_str_new2("pub_key"), ossl_bn_new(pkey->pkey.dsa->pub_key));
+ rb_hash_aset(hash, rb_str_new2("priv_key"), ossl_bn_new(pkey->pkey.dsa->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_dsa_to_text(VALUE self)
+{
+ EVP_PKEY *pkey;
+ BIO *out;
+ BUF_MEM *buf;
+ VALUE str;
+
+ GetPKeyDSA(self, pkey);
+ if (!(out = BIO_new(BIO_s_mem()))) {
+ ossl_raise(eDSAError, NULL);
+ }
+ if (!DSA_print(out, pkey->pkey.dsa, 0)) { //offset = 0
+ BIO_free(out);
+ ossl_raise(eDSAError, NULL);
+ }
+ BIO_get_mem_ptr(out, &buf);
+ str = rb_str_new(buf->data, buf->length);
+ BIO_free(out);
+
+ return str;
+}
+
+/*
+ * Makes new instance DSA PUBLIC_KEY from PRIVATE_KEY
+ */
+static VALUE
+ossl_dsa_to_public_key(VALUE self)
+{
+ EVP_PKEY *pkey;
+ DSA *dsa;
+ VALUE obj;
+
+ GetPKeyDSA(self, pkey);
+ /* err check performed by dsa_instance */
+ dsa = DSAPublicKey_dup(pkey->pkey.dsa);
+ obj = dsa_instance(CLASS_OF(self), dsa);
+ if (obj == Qfalse) {
+ DSA_free(dsa);
+ ossl_raise(eDSAError, NULL);
+ }
+ return obj;
+}
+
+static VALUE
+ossl_dsa_sign(VALUE self, VALUE data)
+{
+ EVP_PKEY *pkey;
+ char *buf;
+ int buf_len;
+ VALUE str;
+
+ GetPKeyDSA(self, pkey);
+ StringValue(data);
+ if (!DSA_PRIVATE(pkey->pkey.dsa)) {
+ ossl_raise(eDSAError, "Private DSA key needed!");
+ }
+ if (!(buf = OPENSSL_malloc(DSA_size(pkey->pkey.dsa) + 16))) {
+ ossl_raise(eDSAError, NULL);
+ }
+ if (!DSA_sign(0, RSTRING(data)->ptr, RSTRING(data)->len, buf,
+ &buf_len, pkey->pkey.dsa)) { /* type is ignored (0) */
+ OPENSSL_free(buf);
+ ossl_raise(eDSAError, NULL);
+ }
+ str = rb_str_new(buf, buf_len);
+ OPENSSL_free(buf);
+
+ return str;
+}
+
+static VALUE
+ossl_dsa_verify(VALUE self, VALUE digest, VALUE sig)
+{
+ EVP_PKEY *pkey;
+ int ret;
+
+ GetPKeyDSA(self, pkey);
+ StringValue(digest);
+ StringValue(sig);
+ /* type is ignored (0) */
+ ret = DSA_verify(0, RSTRING(digest)->ptr, RSTRING(digest)->len,
+ RSTRING(sig)->ptr, RSTRING(sig)->len, pkey->pkey.dsa);
+ if (ret < 0) {
+ ossl_raise(eDSAError, NULL);
+ }
+ else if (ret == 1) {
+ return Qtrue;
+ }
+
+ return Qfalse;
+}
+
+/*
+ * INIT
+ */
+void
+Init_ossl_dsa()
+{
+ eDSAError = rb_define_class_under(mPKey, "DSAError", ePKeyError);
+
+ cDSA = rb_define_class_under(mPKey, "DSA", cPKey);
+
+ rb_define_singleton_method(cDSA, "generate", ossl_dsa_s_generate, 1);
+ rb_define_method(cDSA, "initialize", ossl_dsa_initialize, -1);
+
+ rb_define_method(cDSA, "public?", ossl_dsa_is_public, 0);
+ rb_define_method(cDSA, "private?", ossl_dsa_is_private, 0);
+ rb_define_method(cDSA, "to_text", ossl_dsa_to_text, 0);
+ rb_define_method(cDSA, "export", ossl_dsa_export, -1);
+ rb_define_alias(cDSA, "to_pem", "export");
+ rb_define_alias(cDSA, "to_s", "export");
+ rb_define_method(cDSA, "public_key", ossl_dsa_to_public_key, 0);
+ rb_define_method(cDSA, "syssign", ossl_dsa_sign, 1);
+ rb_define_method(cDSA, "sysverify", ossl_dsa_verify, 2);
+
+ rb_define_method(cDSA, "params", ossl_dsa_get_params, 0);
+}
+
+#else /* defined NO_DSA */
+# warning >>> OpenSSL is compiled without DSA support <<<
+
+void
+Init_ossl_dsa()
+{
+ rb_warning("OpenSSL is compiled without DSA support");
+}
+
+#endif /* NO_DSA */