Various improvements (#24)

pyrogram · Oct 11, 2021 · 4102d3b · 4102d3b
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diff --git a/README.md b/README.md
@@ -2,24 +2,15 @@
 
 <img src="https://i.imgur.com/JyxrStE.png" width="160" align="right">
 
-> Fast and Portable Telegram Crypto Library for Python
+> Fast and Portable Cryptography Extension Library for Pyrogram
 
-**TgCrypto** is a Telegram Crypto Library written in C89 as a Python extension. It is designed to be portable, fast, easy
-to install and use. TgCrypto is intended for [Pyrogram](https://github.com/pyrogram/pyrogram) and implements the crypto
-algorithms Telegram requires, namely:
+**TgCrypto** is a Cryptography Library written in C as a Python extension. It is designed to be portable, fast,
+easy to install and use. TgCrypto is intended for [Pyrogram](https://github.com/pyrogram/pyrogram) and implements the
+cryptographic algorithms Telegram requires, namely:
 
-- **`AES256-IGE`** - used in [MTProto v2.0](https://core.telegram.org/mtproto).
-- **`AES256-CTR`** - used for [CDN encrypted files](https://core.telegram.org/cdn).
-- **`AES256-CBC`** - used for [encrypted passport credentials](https://core.telegram.org/passport).
-
-Python [wheels are available](https://pypi.org/project/TgCrypto/#files) for hassle-free installations; they are
-automatically built and tested using Travis CI for Linux (i686, x86_64, AArch64), Windows (32-bit, 64-bit) and macOS
-(x86_64).
-
-Even though TgCrypto is primarily intended for use with Pyrogram, you are free and welcome to use it for any other
-Python project too, as it's shipped as standalone package.
-
-More info: https://docs.pyrogram.org/topics/tgcrypto
+- **`AES-256-IGE`** - used in [MTProto v2.0](https://core.telegram.org/mtproto).
+- **`AES-256-CTR`** - used for [CDN encrypted files](https://core.telegram.org/cdn).
+- **`AES-256-CBC`** - used for [encrypted passport credentials](https://core.telegram.org/passport).
 
 ## Requirements
 
@@ -163,7 +154,8 @@ print(data == cbc_decrypted)  # True
 
 1. Clone this repository: `git clone https://github.com/pyrogram/tgcrypto`.
 2. Enter the directory: `cd tgcrypto`.
-3. Run tests: `python3 setup.py test`.
+3. Install `tox`: `pip3 install tox`
+4. Run tests: `tox`.
 
 ## License
 

diff --git a/pyproject.toml b/pyproject.toml
@@ -0,0 +1,3 @@
+[build-system]
+requires = ["setuptools", "wheel"]
+build-backend = "setuptools.build_meta"
diff --git a/setup.py b/setup.py
@@ -24,7 +24,7 @@
 setup(
     name="TgCrypto",
     version="1.2.2",
-    description="Fast Telegram Crypto Library for Python",
+    description="Fast and Portable Cryptography Extension Library for Pyrogram",
     long_description=readme,
     long_description_content_type="text/markdown",
     url="https://github.com/pyrogram",
@@ -40,12 +40,11 @@
         "Programming Language :: C",
         "Programming Language :: Python",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.3",
-        "Programming Language :: Python :: 3.4",
-        "Programming Language :: Python :: 3.5",
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
+        "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: Implementation",
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python :: Implementation :: PyPy",
@@ -57,7 +56,7 @@
         "Topic :: Software Development :: Libraries",
         "Topic :: Software Development :: Libraries :: Python Modules"
     ],
-    keywords="fast pyrogram telegram crypto mtproto api client library python",
+    keywords="pyrogram telegram crypto cryptography encryption mtproto extension library aes",
     project_urls={
         "Tracker": "https://github.com/pyrogram/tgcrypto/issues",
         "Community": "https://t.me/pyrogram",

diff --git a/tgcrypto/aes256.c b/tgcrypto/aes256.c
@@ -306,25 +306,6 @@ static const uint32_t Td3[256] = {
     0xa8017139, 0x0cb3de08, 0xb4e49cd8, 0x56c19064, 0xcb84617b, 0x32b670d5, 0x6c5c7448, 0xb85742d0
 };
 
-static const uint8_t Td4[256] = {
-    0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb,
-    0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb,
-    0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e,
-    0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25,
-    0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92,
-    0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84,
-    0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06,
-    0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b,
-    0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73,
-    0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e,
-    0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b,
-    0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4,
-    0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f,
-    0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef,
-    0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61,
-    0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d
-};
-
 static const uint8_t SBOX[16][16] = {
     {0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76},
     {0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0},
@@ -344,6 +325,25 @@ static const uint8_t SBOX[16][16] = {
     {0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16}
 };
 
+static const uint8_t SBOX1[256] = {
+    0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb,
+    0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb,
+    0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e,
+    0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25,
+    0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92,
+    0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84,
+    0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06,
+    0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b,
+    0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73,
+    0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e,
+    0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b,
+    0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4,
+    0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f,
+    0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef,
+    0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61,
+    0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d
+};
+
 static const uint32_t RCON[10] = {
     0x01000000, 0x02000000, 0x04000000, 0x08000000, 0x10000000,
     0x20000000, 0x40000000, 0x80000000, 0x1b000000, 0x36000000
@@ -591,40 +591,40 @@ void aes256_decrypt(const uint8_t in[16], uint8_t out[16], const uint32_t key[60
     t3 = Td0[s3 >> 24] ^ Td1[(s2 >> 16) & 0xff] ^ Td2[(s1 >> 8) & 0xff] ^ Td3[s0 & 0xff] ^ key[55];
 
     s0 = (
-        ((uint32_t) Td4[(t0 >> 24)] << 24)
-        ^ ((uint32_t) Td4[(t3 >> 16) & 0xff] << 16)
-        ^ ((uint32_t) Td4[(t2 >> 8) & 0xff] << 8)
-        ^ ((uint32_t) Td4[(t1) & 0xff])
+        ((uint32_t) SBOX1[(t0 >> 24)] << 24)
+        ^ ((uint32_t) SBOX1[(t3 >> 16) & 0xff] << 16)
+        ^ ((uint32_t) SBOX1[(t2 >> 8) & 0xff] << 8)
+        ^ ((uint32_t) SBOX1[(t1) & 0xff])
         ^ key[56]
     );
 
     PUT(out, s0);
 
     s1 = (
-        ((uint32_t) Td4[(t1 >> 24)] << 24)
-        ^ ((uint32_t) Td4[(t0 >> 16) & 0xff] << 16)
-        ^ ((uint32_t) Td4[(t3 >> 8) & 0xff] << 8)
-        ^ ((uint32_t) Td4[(t2) & 0xff])
+        ((uint32_t) SBOX1[(t1 >> 24)] << 24)
+        ^ ((uint32_t) SBOX1[(t0 >> 16) & 0xff] << 16)
+        ^ ((uint32_t) SBOX1[(t3 >> 8) & 0xff] << 8)
+        ^ ((uint32_t) SBOX1[(t2) & 0xff])
         ^ key[57]
     );
 
     PUT(out + 4, s1);
 
     s2 = (
-        ((uint32_t) Td4[(t2 >> 24)] << 24)
-        ^ ((uint32_t) Td4[(t1 >> 16) & 0xff] << 16)
-        ^ ((uint32_t) Td4[(t0 >> 8) & 0xff] << 8)
-        ^ ((uint32_t) Td4[(t3) & 0xff])
+        ((uint32_t) SBOX1[(t2 >> 24)] << 24)
+        ^ ((uint32_t) SBOX1[(t1 >> 16) & 0xff] << 16)
+        ^ ((uint32_t) SBOX1[(t0 >> 8) & 0xff] << 8)
+        ^ ((uint32_t) SBOX1[(t3) & 0xff])
         ^ key[58]
     );
 
     PUT(out + 8, s2);
 
     s3 = (
-        ((uint32_t) Td4[(t3 >> 24)] << 24)
-        ^ ((uint32_t) Td4[(t2 >> 16) & 0xff] << 16)
-        ^ ((uint32_t) Td4[(t1 >> 8) & 0xff] << 8)
-        ^ ((uint32_t) Td4[(t0) & 0xff])
+        ((uint32_t) SBOX1[(t3 >> 24)] << 24)
+        ^ ((uint32_t) SBOX1[(t2 >> 16) & 0xff] << 16)
+        ^ ((uint32_t) SBOX1[(t1 >> 8) & 0xff] << 8)
+        ^ ((uint32_t) SBOX1[(t0) & 0xff])
         ^ key[59]
     );
 

diff --git a/tgcrypto/tgcrypto.c b/tgcrypto/tgcrypto.c
@@ -19,13 +19,18 @@
  */
 
 #define PY_SSIZE_T_CLEAN
+
 #include <Python.h>
 
 #include "aes256.h"
 #include "ige256.h"
 #include "ctr256.h"
 #include "cbc256.h"
 
+#define DESCRIPTION "Fast and Portable Cryptography Extension Library for Pyrogram\n" \
+    "TgCrypto is part of Pyrogram, a Telegram MTProto library for Python\n" \
+    "You can learn more about Pyrogram here: https://pyrogram.org\n"
+
 static PyObject *ige(PyObject *args, uint8_t encrypt) {
     Py_buffer data, key, iv;
     uint8_t *buf;
@@ -55,7 +60,7 @@ static PyObject *ige(PyObject *args, uint8_t encrypt) {
     }
 
     Py_BEGIN_ALLOW_THREADS
-    buf = ige256(data.buf, data.len, key.buf, iv.buf, encrypt);
+        buf = ige256(data.buf, data.len, key.buf, iv.buf, encrypt);
     Py_END_ALLOW_THREADS
 
     PyBuffer_Release(&data);
@@ -110,7 +115,7 @@ static PyObject *ctr256_encrypt(PyObject *self, PyObject *args) {
     }
 
     Py_BEGIN_ALLOW_THREADS
-    buf = ctr256(data.buf, data.len, key.buf, iv.buf, state.buf);
+        buf = ctr256(data.buf, data.len, key.buf, iv.buf, state.buf);
     Py_END_ALLOW_THREADS
 
     PyBuffer_Release(&data);
@@ -152,7 +157,7 @@ static PyObject *cbc(PyObject *args, uint8_t encrypt) {
     }
 
     Py_BEGIN_ALLOW_THREADS
-    buf = cbc256(data.buf, data.len, key.buf, iv.buf, encrypt);
+        buf = cbc256(data.buf, data.len, key.buf, iv.buf, encrypt);
     Py_END_ALLOW_THREADS
 
     PyBuffer_Release(&data);
@@ -173,20 +178,62 @@ static PyObject *cbc256_decrypt(PyObject *self, PyObject *args) {
     return cbc(args, 0);
 }
 
+PyDoc_STRVAR(
+    ige256_encrypt_docs,
+    "ige256_encrypt(data, key, iv)\n"
+    "--\n\n"
+    "AES-256-IGE Encryption"
+);
+
+PyDoc_STRVAR(
+    ige256_decrypt_docs,
+    "ige256_decrypt(data, key, iv)\n"
+    "--\n\n"
+    "AES-256-IGE Decryption"
+);
+
+PyDoc_STRVAR(
+    ctr256_encrypt_docs,
+    "ctr256_encrypt(data, key, iv, state)\n"
+    "--\n\n"
+    "AES-256-CTR Encryption"
+);
+
+PyDoc_STRVAR(
+    ctr256_decrypt_docs,
+    "ctr256_decrypt(data, key, iv, state)\n"
+    "--\n\n"
+    "AES-256-CTR Decryption"
+);
+
+PyDoc_STRVAR(
+    cbc256_encrypt_docs,
+    "cbc256_encrypt(data, key, iv)\n"
+    "--\n\n"
+    "AES-256-CBC Encryption"
+);
+
+PyDoc_STRVAR(
+    cbc256_decrypt_docs,
+    "cbc256_decrypt(data, key, iv)\n"
+    "--\n\n"
+    "AES-256-CBC Encryption"
+);
+
 static PyMethodDef methods[] = {
-    {"ige256_encrypt", (PyCFunction) ige256_encrypt, METH_VARARGS, "AES256-IGE Encryption"},
-    {"ige256_decrypt", (PyCFunction) ige256_decrypt, METH_VARARGS, "AES256-IGE Decryption"},
-    {"ctr256_encrypt", (PyCFunction) ctr256_encrypt, METH_VARARGS, "AES256-CTR Encryption"},
-    {"ctr256_decrypt", (PyCFunction) ctr256_encrypt, METH_VARARGS, "AES256-CTR Decryption"},
-    {"cbc256_encrypt", (PyCFunction) cbc256_encrypt, METH_VARARGS, "AES256-CBC Encryption"},
-    {"cbc256_decrypt", (PyCFunction) cbc256_decrypt, METH_VARARGS, "AES256-CBC Decryption"},
-    {NULL,             NULL,                         0,            NULL}
+    {"ige256_encrypt", (PyCFunction) ige256_encrypt, METH_VARARGS, ige256_encrypt_docs},
+    {"ige256_decrypt", (PyCFunction) ige256_decrypt, METH_VARARGS, ige256_decrypt_docs},
+    {"ctr256_encrypt", (PyCFunction) ctr256_encrypt, METH_VARARGS, ctr256_encrypt_docs},
+    {"ctr256_decrypt", (PyCFunction) ctr256_encrypt, METH_VARARGS, ctr256_decrypt_docs},
+    {"cbc256_encrypt", (PyCFunction) cbc256_encrypt, METH_VARARGS, cbc256_encrypt_docs},
+    {"cbc256_decrypt", (PyCFunction) cbc256_decrypt, METH_VARARGS, cbc256_decrypt_docs},
+    {NULL}
 };
 
 static struct PyModuleDef module = {
     PyModuleDef_HEAD_INIT,
-    "tgcrypto",
-    "Telegram Crypto for Pyrogram",
+    "TgCrypto",
+    DESCRIPTION,
     -1,
     methods
 };

diff --git a/tox.ini b/tox.ini
@@ -1,3 +1,3 @@
 [testenv]
 deps = pytest
-commands = pytest {posargs}
+commands = pytest {posargs}