diff --git a/src/framework/util/rsa.cpp b/src/framework/util/rsa.cpp new file mode 100644 index 00000000..40689d25 --- /dev/null +++ b/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; +} diff --git a/src/framework/util/rsa.h b/src/framework/util/rsa.h new file mode 100644 index 00000000..b7308d1a --- /dev/null +++ b/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 + +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 RsaPtr; + +#endif //RSA_H \ No newline at end of file