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/*
* $Id$
* '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'.)
*/
#include "ossl.h"
/*
* Classes
*/
VALUE mPKey;
VALUE cPKey;
VALUE ePKeyError;
ID id_private_q;
/*
* callback for generating keys
*/
void
ossl_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);
}
/*
* Public
*/
VALUE
ossl_pkey_new(EVP_PKEY *pkey)
{
if (!pkey) {
ossl_raise(ePKeyError, "Cannot make new key from NULL.");
}
switch (EVP_PKEY_type(pkey->type)) {
#if !defined(OPENSSL_NO_RSA)
case EVP_PKEY_RSA:
return ossl_rsa_new(pkey);
#endif
#if !defined(OPENSSL_NO_DSA)
case EVP_PKEY_DSA:
return ossl_dsa_new(pkey);
#endif
#if !defined(OPENSSL_NO_DH)
case EVP_PKEY_DH:
return ossl_dh_new(pkey);
#endif
#if !defined(OPENSSL_NO_EC) && (OPENSSL_VERSION_NUMBER >= 0x0090802fL)
case EVP_PKEY_EC:
return ossl_ec_new(pkey);
#endif
default:
ossl_raise(ePKeyError, "unsupported key type");
}
return Qnil; /* not reached */
}
VALUE
ossl_pkey_new_from_file(VALUE filename)
{
FILE *fp;
EVP_PKEY *pkey;
SafeStringValue(filename);
if (!(fp = fopen(RSTRING_PTR(filename), "r"))) {
ossl_raise(ePKeyError, "%s", strerror(errno));
}
pkey = PEM_read_PrivateKey(fp, NULL, ossl_pem_passwd_cb, NULL);
fclose(fp);
if (!pkey) {
ossl_raise(ePKeyError, NULL);
}
return ossl_pkey_new(pkey);
}
EVP_PKEY *
GetPKeyPtr(VALUE obj)
{
EVP_PKEY *pkey;
SafeGetPKey(obj, pkey);
return pkey;
}
EVP_PKEY *
GetPrivPKeyPtr(VALUE obj)
{
EVP_PKEY *pkey;
if (rb_funcall(obj, id_private_q, 0, NULL) != Qtrue) {
ossl_raise(rb_eArgError, "Private key is needed.");
}
SafeGetPKey(obj, pkey);
return pkey;
}
EVP_PKEY *
DupPKeyPtr(VALUE obj)
{
EVP_PKEY *pkey;
SafeGetPKey(obj, pkey);
CRYPTO_add(&pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
return pkey;
}
EVP_PKEY *
DupPrivPKeyPtr(VALUE obj)
{
EVP_PKEY *pkey;
if (rb_funcall(obj, id_private_q, 0, NULL) != Qtrue) {
ossl_raise(rb_eArgError, "Private key is needed.");
}
SafeGetPKey(obj, pkey);
CRYPTO_add(&pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
return pkey;
}
/*
* Private
*/
static VALUE
ossl_pkey_alloc(VALUE klass)
{
EVP_PKEY *pkey;
VALUE obj;
if (!(pkey = EVP_PKEY_new())) {
ossl_raise(ePKeyError, NULL);
}
WrapPKey(klass, obj, pkey);
return obj;
}
static VALUE
ossl_pkey_initialize(VALUE self)
{
if (rb_obj_is_instance_of(self, cPKey)) {
ossl_raise(rb_eNotImpError, "OpenSSL::PKey::PKey is an abstract class.");
}
return self;
}
static VALUE
ossl_pkey_sign(VALUE self, VALUE digest, VALUE data)
{
EVP_PKEY *pkey;
EVP_MD_CTX ctx;
unsigned int buf_len;
VALUE str;
if (rb_funcall(self, id_private_q, 0, NULL) != Qtrue) {
ossl_raise(rb_eArgError, "Private key is needed.");
}
GetPKey(self, pkey);
EVP_SignInit(&ctx, GetDigestPtr(digest));
StringValue(data);
EVP_SignUpdate(&ctx, RSTRING_PTR(data), RSTRING_LEN(data));
str = rb_str_new(0, EVP_PKEY_size(pkey)+16);
if (!EVP_SignFinal(&ctx, (unsigned char *)RSTRING_PTR(str), &buf_len, pkey))
ossl_raise(ePKeyError, NULL);
assert((long)buf_len <= RSTRING_LEN(str));
rb_str_set_len(str, buf_len);
return str;
}
static VALUE
ossl_pkey_verify(VALUE self, VALUE digest, VALUE sig, VALUE data)
{
EVP_PKEY *pkey;
EVP_MD_CTX ctx;
GetPKey(self, pkey);
EVP_VerifyInit(&ctx, GetDigestPtr(digest));
StringValue(sig);
StringValue(data);
EVP_VerifyUpdate(&ctx, RSTRING_PTR(data), RSTRING_LEN(data));
switch (EVP_VerifyFinal(&ctx, (unsigned char *)RSTRING_PTR(sig), RSTRING_LEN(sig), pkey)) {
case 0:
return Qfalse;
case 1:
return Qtrue;
default:
ossl_raise(ePKeyError, NULL);
}
return Qnil; /* dummy */
}
/*
* INIT
*/
void
Init_ossl_pkey()
{
#if 0 /* let rdoc know about mOSSL */
mOSSL = rb_define_module("OpenSSL");
#endif
mPKey = rb_define_module_under(mOSSL, "PKey");
ePKeyError = rb_define_class_under(mPKey, "PKeyError", eOSSLError);
cPKey = rb_define_class_under(mPKey, "PKey", rb_cObject);
rb_define_alloc_func(cPKey, ossl_pkey_alloc);
rb_define_method(cPKey, "initialize", ossl_pkey_initialize, 0);
rb_define_method(cPKey, "sign", ossl_pkey_sign, 2);
rb_define_method(cPKey, "verify", ossl_pkey_verify, 3);
id_private_q = rb_intern("private?");
/*
* INIT rsa, dsa, dh, ec
*/
Init_ossl_rsa();
Init_ossl_dsa();
Init_ossl_dh();
Init_ossl_ec();
}
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