adding rsa sources

src/framework/util/rsa.cpp

@@ -0,0 +1,155 @@
+/* The MIT License
+ *
+ * Copyright (c) 2010 OTClient, https://github.com/edubart/otclient
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "rsa.h"
+
+Rsa::Rsa()
+{
+    m_keySet = false;
+    mpz_init2(m_p, 1024);
+    mpz_init2(m_q, 1024);
+    mpz_init2(m_d, 1024);
+    mpz_init2(m_u, 1024);
+    mpz_init2(m_dp, 1024);
+    mpz_init2(m_dq, 1024);
+    mpz_init2(m_mod, 1024);
+}
+
+Rsa::~Rsa()
+{
+    mpz_clear(m_p);
+    mpz_clear(m_q);
+    mpz_clear(m_d);
+    mpz_clear(m_u);
+    mpz_clear(m_dp);
+    mpz_clear(m_dq);
+    mpz_clear(m_mod);
+}
+
+bool Rsa::setKey(const std::string& file)
+{
+    //loads p,q and d from a file
+    FILE* f = fopen(file.c_str(), "r");
+    if(!f){
+            return false;
+    }
+
+    char p[512];
+    char q[512];
+    char d[512];
+    delete fgets(p, 512, f);
+    delete fgets(q, 512, f);
+    delete fgets(d, 512, f);
+
+    setKey(p, q, d);
+    return true;
+}
+
+void Rsa::setKey(const char* p, const char* q, const char* d)
+{
+    mpz_set_str(m_p, p, 10);
+    mpz_set_str(m_q, q, 10);
+    mpz_set_str(m_d, d, 10);
+
+    mpz_t pm1,qm1;
+    mpz_init2(pm1,520);
+    mpz_init2(qm1,520);
+
+    mpz_sub_ui(pm1, m_p, 1);
+    mpz_sub_ui(qm1, m_q, 1);
+    mpz_invert(m_u, m_p, m_q);
+    mpz_mod(m_dp, m_d, pm1);
+    mpz_mod(m_dq, m_d, qm1);
+
+    mpz_mul(m_mod, m_p, m_q);
+
+    mpz_clear(pm1);
+    mpz_clear(qm1);
+}
+
+bool Rsa::encrypt(char* msg, int32_t size, const char* key)
+{
+    mpz_t plain, c;
+    mpz_init2(plain, 1024);
+    mpz_init2(c, 1024);
+
+    mpz_t e;
+    mpz_init(e);
+    mpz_set_ui(e,65537);
+
+    mpz_t mod;
+    mpz_init2(mod, 1024);
+    mpz_set_str(mod, key, 10);
+
+    mpz_import(plain, 128, 1, 1, 0, 0, msg);
+    mpz_powm(c, plain, e, mod);
+
+    size_t count = (mpz_sizeinbase(c, 2) + 7)/8;
+    memset(msg, 0, 128 - count);
+    mpz_export(&msg[128 - count], NULL, 1, 1, 0, 0, c);
+
+    mpz_clear(c);
+    mpz_clear(plain);
+    mpz_clear(e);
+    mpz_clear(mod);
+    return true;
+}
+
+bool Rsa::decrypt(char* msg, int32_t size)
+{
+    mpz_t c,v1,v2,u2,tmp;
+    mpz_init2(c, 1024);
+    mpz_init2(v1, 1024);
+    mpz_init2(v2, 1024);
+    mpz_init2(u2, 1024);
+    mpz_init2(tmp, 1024);
+
+    mpz_import(c, 128, 1, 1, 0, 0, msg);
+
+    mpz_mod(tmp, c, m_p);
+    mpz_powm(v1, tmp, m_dp, m_p);
+    mpz_mod(tmp, c, m_q);
+    mpz_powm(v2, tmp, m_dq, m_q);
+    mpz_sub(u2, v2, v1);
+    mpz_mul(tmp, u2, m_u);
+    mpz_mod(u2, tmp, m_q);
+    if(mpz_cmp_si(u2, 0) < 0){
+            mpz_add(tmp, u2, m_q);
+            mpz_set(u2, tmp);
+    }
+    mpz_mul(tmp, u2, m_p);
+    mpz_set_ui(c, 0);
+    mpz_add(c, v1, tmp);
+
+    size_t count = (mpz_sizeinbase(c, 2) + 7)/8;
+    memset(msg, 0, 128 - count);
+    mpz_export(&msg[128 - count], NULL, 1, 1, 0, 0, c);
+
+    mpz_clear(c);
+    mpz_clear(v1);
+    mpz_clear(v2);
+    mpz_clear(u2);
+    mpz_clear(tmp);
+
+    return true;
+}

src/framework/util/rsa.h

@@ -0,0 +1,48 @@
+/* The MIT License
+ *
+ * Copyright (c) 2010 OTClient, https://github.com/edubart/otclient
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef RSA_H
+#define RSA_H
+
+#include "../prerequisites.h"
+
+#include <gmp.h>
+
+class Rsa{
+public:
+    Rsa();
+    ~Rsa();
+    void setKey(const char* p, const char* q, const char* d);
+    bool setKey(const std::string& file);
+    bool decrypt(char* msg, int32_t size);
+    static bool encrypt(char* msg, int32_t size, const char* key);
+
+protected:
+    bool m_keySet;
+
+    mpz_t m_p, m_q, m_u, m_d, m_dp, m_dq, m_mod;
+};
+
+typedef std::shared_ptr<Rsa> RsaPtr;
+
+#endif //RSA_H