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9b29358511
Status lines for Emacs and Vim have been added to Python sources so they'll be easier to edit using Python's preferred coding style. Some DNS helper functions have been broken up into multiple files. It's nice to have one function per file whenever possible, since that way we don't need -ffunction-sections. Another reason it's good to have small source files, is because the build will be enforcing resource limits on compilation and testing soon.
593 lines
16 KiB
C
593 lines
16 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:4;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=4 sts=4 sw=4 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Python 3 │
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│ https://docs.python.org/3/license.html │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/assert.h"
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#include "third_party/python/Include/abstract.h"
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#include "third_party/python/Include/bytesobject.h"
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#include "third_party/python/Include/descrobject.h"
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#include "third_party/python/Include/longobject.h"
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#include "third_party/python/Include/modsupport.h"
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#include "third_party/python/Include/objimpl.h"
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#include "third_party/python/Include/pymacro.h"
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#include "third_party/python/Include/pystrhex.h"
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#include "third_party/python/Modules/hashlib.h"
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/* clang-format off */
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/* See below for information about the original code this module was
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based upon. Additional work performed by:
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Andrew Kuchling (amk@amk.ca)
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Greg Stein (gstein@lyra.org)
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Trevor Perrin (trevp@trevp.net)
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Copyright (C) 2005-2007 Gregory P. Smith (greg@krypto.org)
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Licensed to PSF under a Contributor Agreement.
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*/
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/*[clinic input]
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module _md5
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class MD5Type "MD5object *" "&PyType_Type"
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[clinic start generated code]*/
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/*[clinic end generated code: output=da39a3ee5e6b4b0d input=6e5261719957a912]*/
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/* Some useful types */
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#if SIZEOF_INT == 4
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typedef unsigned int MD5_INT32; /* 32-bit integer */
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typedef long long MD5_INT64; /* 64-bit integer */
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#else
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/* not defined. compilation will die. */
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#endif
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/* The MD5 block size and message digest sizes, in bytes */
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#define MD5_BLOCKSIZE 64
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#define MD5_DIGESTSIZE 16
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/* The structure for storing MD5 info */
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struct md5_state {
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MD5_INT64 length;
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MD5_INT32 state[4], curlen;
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unsigned char buf[MD5_BLOCKSIZE];
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};
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typedef struct {
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PyObject_HEAD
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struct md5_state hash_state;
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} MD5object;
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#include "third_party/python/Modules/clinic/md5module.inc"
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/* ------------------------------------------------------------------------
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*
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* This code for the MD5 algorithm was noted as public domain. The
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* original headers are pasted below.
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*
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* Several changes have been made to make it more compatible with the
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* Python environment and desired interface.
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*
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*/
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/* LibTomCrypt, modular cryptographic library -- Tom St Denis
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*
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* LibTomCrypt is a library that provides various cryptographic
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* algorithms in a highly modular and flexible manner.
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*
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* The library is free for all purposes without any express
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* guarantee it works.
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*
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* Tom St Denis, tomstdenis@gmail.com, http://libtom.org
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*/
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/* rotate the hard way (platform optimizations could be done) */
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#define ROLc(x, y) ( (((unsigned long)(x)<<(unsigned long)((y)&31)) | (((unsigned long)(x)&0xFFFFFFFFUL)>>(unsigned long)(32-((y)&31)))) & 0xFFFFFFFFUL)
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/* Endian Neutral macros that work on all platforms */
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#define STORE32L(x, y) \
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{ (y)[3] = (unsigned char)(((x)>>24)&255); (y)[2] = (unsigned char)(((x)>>16)&255); \
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(y)[1] = (unsigned char)(((x)>>8)&255); (y)[0] = (unsigned char)((x)&255); }
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#define LOAD32L(x, y) \
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{ x = ((unsigned long)((y)[3] & 255)<<24) | \
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((unsigned long)((y)[2] & 255)<<16) | \
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((unsigned long)((y)[1] & 255)<<8) | \
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((unsigned long)((y)[0] & 255)); }
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#define STORE64L(x, y) \
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{ (y)[7] = (unsigned char)(((x)>>56)&255); (y)[6] = (unsigned char)(((x)>>48)&255); \
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(y)[5] = (unsigned char)(((x)>>40)&255); (y)[4] = (unsigned char)(((x)>>32)&255); \
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(y)[3] = (unsigned char)(((x)>>24)&255); (y)[2] = (unsigned char)(((x)>>16)&255); \
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(y)[1] = (unsigned char)(((x)>>8)&255); (y)[0] = (unsigned char)((x)&255); }
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/* MD5 macros */
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#define F(x,y,z) (z ^ (x & (y ^ z)))
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#define G(x,y,z) (y ^ (z & (y ^ x)))
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#define H(x,y,z) (x^y^z)
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#define I(x,y,z) (y^(x|(~z)))
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#define FF(a,b,c,d,M,s,t) \
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a = (a + F(b,c,d) + M + t); a = ROLc(a, s) + b;
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#define GG(a,b,c,d,M,s,t) \
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a = (a + G(b,c,d) + M + t); a = ROLc(a, s) + b;
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#define HH(a,b,c,d,M,s,t) \
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a = (a + H(b,c,d) + M + t); a = ROLc(a, s) + b;
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#define II(a,b,c,d,M,s,t) \
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a = (a + I(b,c,d) + M + t); a = ROLc(a, s) + b;
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static void md5_compress(struct md5_state *md5, unsigned char *buf)
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{
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MD5_INT32 i, W[16], a, b, c, d;
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assert(md5 != NULL);
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assert(buf != NULL);
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/* copy the state into 512-bits into W[0..15] */
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for (i = 0; i < 16; i++) {
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LOAD32L(W[i], buf + (4*i));
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}
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/* copy state */
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a = md5->state[0];
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b = md5->state[1];
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c = md5->state[2];
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d = md5->state[3];
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FF(a,b,c,d,W[0],7,0xd76aa478UL)
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FF(d,a,b,c,W[1],12,0xe8c7b756UL)
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FF(c,d,a,b,W[2],17,0x242070dbUL)
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FF(b,c,d,a,W[3],22,0xc1bdceeeUL)
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FF(a,b,c,d,W[4],7,0xf57c0fafUL)
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FF(d,a,b,c,W[5],12,0x4787c62aUL)
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FF(c,d,a,b,W[6],17,0xa8304613UL)
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FF(b,c,d,a,W[7],22,0xfd469501UL)
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FF(a,b,c,d,W[8],7,0x698098d8UL)
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FF(d,a,b,c,W[9],12,0x8b44f7afUL)
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FF(c,d,a,b,W[10],17,0xffff5bb1UL)
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FF(b,c,d,a,W[11],22,0x895cd7beUL)
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FF(a,b,c,d,W[12],7,0x6b901122UL)
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FF(d,a,b,c,W[13],12,0xfd987193UL)
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FF(c,d,a,b,W[14],17,0xa679438eUL)
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FF(b,c,d,a,W[15],22,0x49b40821UL)
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GG(a,b,c,d,W[1],5,0xf61e2562UL)
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GG(d,a,b,c,W[6],9,0xc040b340UL)
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GG(c,d,a,b,W[11],14,0x265e5a51UL)
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GG(b,c,d,a,W[0],20,0xe9b6c7aaUL)
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GG(a,b,c,d,W[5],5,0xd62f105dUL)
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GG(d,a,b,c,W[10],9,0x02441453UL)
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GG(c,d,a,b,W[15],14,0xd8a1e681UL)
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GG(b,c,d,a,W[4],20,0xe7d3fbc8UL)
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GG(a,b,c,d,W[9],5,0x21e1cde6UL)
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GG(d,a,b,c,W[14],9,0xc33707d6UL)
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GG(c,d,a,b,W[3],14,0xf4d50d87UL)
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GG(b,c,d,a,W[8],20,0x455a14edUL)
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GG(a,b,c,d,W[13],5,0xa9e3e905UL)
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GG(d,a,b,c,W[2],9,0xfcefa3f8UL)
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GG(c,d,a,b,W[7],14,0x676f02d9UL)
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GG(b,c,d,a,W[12],20,0x8d2a4c8aUL)
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HH(a,b,c,d,W[5],4,0xfffa3942UL)
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HH(d,a,b,c,W[8],11,0x8771f681UL)
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HH(c,d,a,b,W[11],16,0x6d9d6122UL)
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HH(b,c,d,a,W[14],23,0xfde5380cUL)
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HH(a,b,c,d,W[1],4,0xa4beea44UL)
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HH(d,a,b,c,W[4],11,0x4bdecfa9UL)
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HH(c,d,a,b,W[7],16,0xf6bb4b60UL)
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HH(b,c,d,a,W[10],23,0xbebfbc70UL)
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HH(a,b,c,d,W[13],4,0x289b7ec6UL)
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HH(d,a,b,c,W[0],11,0xeaa127faUL)
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HH(c,d,a,b,W[3],16,0xd4ef3085UL)
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HH(b,c,d,a,W[6],23,0x04881d05UL)
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HH(a,b,c,d,W[9],4,0xd9d4d039UL)
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HH(d,a,b,c,W[12],11,0xe6db99e5UL)
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HH(c,d,a,b,W[15],16,0x1fa27cf8UL)
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HH(b,c,d,a,W[2],23,0xc4ac5665UL)
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II(a,b,c,d,W[0],6,0xf4292244UL)
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II(d,a,b,c,W[7],10,0x432aff97UL)
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II(c,d,a,b,W[14],15,0xab9423a7UL)
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II(b,c,d,a,W[5],21,0xfc93a039UL)
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II(a,b,c,d,W[12],6,0x655b59c3UL)
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II(d,a,b,c,W[3],10,0x8f0ccc92UL)
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II(c,d,a,b,W[10],15,0xffeff47dUL)
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II(b,c,d,a,W[1],21,0x85845dd1UL)
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II(a,b,c,d,W[8],6,0x6fa87e4fUL)
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II(d,a,b,c,W[15],10,0xfe2ce6e0UL)
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II(c,d,a,b,W[6],15,0xa3014314UL)
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II(b,c,d,a,W[13],21,0x4e0811a1UL)
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II(a,b,c,d,W[4],6,0xf7537e82UL)
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II(d,a,b,c,W[11],10,0xbd3af235UL)
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II(c,d,a,b,W[2],15,0x2ad7d2bbUL)
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II(b,c,d,a,W[9],21,0xeb86d391UL)
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md5->state[0] = md5->state[0] + a;
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md5->state[1] = md5->state[1] + b;
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md5->state[2] = md5->state[2] + c;
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md5->state[3] = md5->state[3] + d;
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}
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/**
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Initialize the hash state
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@param sha1 The hash state you wish to initialize
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*/
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static void
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md5_init(struct md5_state *md5)
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{
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assert(md5 != NULL);
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md5->state[0] = 0x67452301UL;
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md5->state[1] = 0xefcdab89UL;
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md5->state[2] = 0x98badcfeUL;
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md5->state[3] = 0x10325476UL;
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md5->curlen = 0;
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md5->length = 0;
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}
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/**
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Process a block of memory though the hash
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@param sha1 The hash state
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@param in The data to hash
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@param inlen The length of the data (octets)
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*/
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static void
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md5_process(struct md5_state *md5, const unsigned char *in, Py_ssize_t inlen)
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{
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Py_ssize_t n;
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assert(md5 != NULL);
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assert(in != NULL);
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assert(md5->curlen <= sizeof(md5->buf));
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while (inlen > 0) {
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if (md5->curlen == 0 && inlen >= MD5_BLOCKSIZE) {
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md5_compress(md5, (unsigned char *)in);
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md5->length += MD5_BLOCKSIZE * 8;
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in += MD5_BLOCKSIZE;
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inlen -= MD5_BLOCKSIZE;
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} else {
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n = Py_MIN(inlen, (Py_ssize_t)(MD5_BLOCKSIZE - md5->curlen));
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memcpy(md5->buf + md5->curlen, in, (size_t)n);
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md5->curlen += (MD5_INT32)n;
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in += n;
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inlen -= n;
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if (md5->curlen == MD5_BLOCKSIZE) {
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md5_compress(md5, md5->buf);
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md5->length += 8*MD5_BLOCKSIZE;
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md5->curlen = 0;
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}
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}
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}
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}
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/**
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Terminate the hash to get the digest
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@param sha1 The hash state
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@param out [out] The destination of the hash (16 bytes)
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*/
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static void
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md5_done(struct md5_state *md5, unsigned char *out)
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{
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int i;
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assert(md5 != NULL);
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assert(out != NULL);
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assert(md5->curlen < sizeof(md5->buf));
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/* increase the length of the message */
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md5->length += md5->curlen * 8;
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/* append the '1' bit */
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md5->buf[md5->curlen++] = (unsigned char)0x80;
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/* if the length is currently above 56 bytes we append zeros
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* then compress. Then we can fall back to padding zeros and length
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* encoding like normal.
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*/
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if (md5->curlen > 56) {
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while (md5->curlen < 64) {
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md5->buf[md5->curlen++] = (unsigned char)0;
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}
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md5_compress(md5, md5->buf);
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md5->curlen = 0;
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}
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/* pad up to 56 bytes of zeroes */
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while (md5->curlen < 56) {
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md5->buf[md5->curlen++] = (unsigned char)0;
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}
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/* store length */
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STORE64L(md5->length, md5->buf+56);
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md5_compress(md5, md5->buf);
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/* copy output */
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for (i = 0; i < 4; i++) {
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STORE32L(md5->state[i], out+(4*i));
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}
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}
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/* .Source: /cvs/libtom/libtomcrypt/src/hashes/md5.c,v $ */
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/* .Revision: 1.10 $ */
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/* .Date: 2007/05/12 14:25:28 $ */
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/*
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* End of copied MD5 code.
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*
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* ------------------------------------------------------------------------
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*/
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static PyTypeObject MD5type;
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static MD5object *
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newMD5object(void)
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{
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return (MD5object *)PyObject_New(MD5object, &MD5type);
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}
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/* Internal methods for a hash object */
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static void
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MD5_dealloc(PyObject *ptr)
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{
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PyObject_Del(ptr);
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}
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/* External methods for a hash object */
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/*[clinic input]
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MD5Type.copy
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Return a copy of the hash object.
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[clinic start generated code]*/
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static PyObject *
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MD5Type_copy_impl(MD5object *self)
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/*[clinic end generated code: output=596eb36852f02071 input=2c09e6d2493f3079]*/
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{
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MD5object *newobj;
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if ((newobj = newMD5object())==NULL)
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return NULL;
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newobj->hash_state = self->hash_state;
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return (PyObject *)newobj;
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}
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/*[clinic input]
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MD5Type.digest
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Return the digest value as a bytes object.
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[clinic start generated code]*/
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static PyObject *
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MD5Type_digest_impl(MD5object *self)
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/*[clinic end generated code: output=eb691dc4190a07ec input=bc0c4397c2994be6]*/
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{
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unsigned char digest[MD5_DIGESTSIZE];
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struct md5_state temp;
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temp = self->hash_state;
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md5_done(&temp, digest);
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return PyBytes_FromStringAndSize((const char *)digest, MD5_DIGESTSIZE);
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}
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/*[clinic input]
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MD5Type.hexdigest
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Return the digest value as a string of hexadecimal digits.
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[clinic start generated code]*/
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static PyObject *
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MD5Type_hexdigest_impl(MD5object *self)
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/*[clinic end generated code: output=17badced1f3ac932 input=b60b19de644798dd]*/
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{
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unsigned char digest[MD5_DIGESTSIZE];
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struct md5_state temp;
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/* Get the raw (binary) digest value */
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temp = self->hash_state;
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md5_done(&temp, digest);
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return _Py_strhex((const char*)digest, MD5_DIGESTSIZE);
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}
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/*[clinic input]
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MD5Type.update
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obj: object
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/
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Update this hash object's state with the provided string.
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[clinic start generated code]*/
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static PyObject *
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MD5Type_update(MD5object *self, PyObject *obj)
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/*[clinic end generated code: output=f6ad168416338423 input=6e1efcd9ecf17032]*/
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{
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Py_buffer buf;
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GET_BUFFER_VIEW_OR_ERROUT(obj, &buf);
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md5_process(&self->hash_state, buf.buf, buf.len);
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PyBuffer_Release(&buf);
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Py_INCREF(Py_None);
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return Py_None;
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}
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static PyMethodDef MD5_methods[] = {
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MD5TYPE_COPY_METHODDEF
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MD5TYPE_DIGEST_METHODDEF
|
|
MD5TYPE_HEXDIGEST_METHODDEF
|
|
MD5TYPE_UPDATE_METHODDEF
|
|
{NULL, NULL} /* sentinel */
|
|
};
|
|
|
|
static PyObject *
|
|
MD5_get_block_size(PyObject *self, void *closure)
|
|
{
|
|
return PyLong_FromLong(MD5_BLOCKSIZE);
|
|
}
|
|
|
|
static PyObject *
|
|
MD5_get_name(PyObject *self, void *closure)
|
|
{
|
|
return PyUnicode_FromStringAndSize("md5", 3);
|
|
}
|
|
|
|
static PyObject *
|
|
md5_get_digest_size(PyObject *self, void *closure)
|
|
{
|
|
return PyLong_FromLong(MD5_DIGESTSIZE);
|
|
}
|
|
|
|
|
|
static PyGetSetDef MD5_getseters[] = {
|
|
{"block_size",
|
|
(getter)MD5_get_block_size, NULL,
|
|
NULL,
|
|
NULL},
|
|
{"name",
|
|
(getter)MD5_get_name, NULL,
|
|
NULL,
|
|
NULL},
|
|
{"digest_size",
|
|
(getter)md5_get_digest_size, NULL,
|
|
NULL,
|
|
NULL},
|
|
{NULL} /* Sentinel */
|
|
};
|
|
|
|
static PyTypeObject MD5type = {
|
|
PyVarObject_HEAD_INIT(NULL, 0)
|
|
"_md5.md5", /*tp_name*/
|
|
sizeof(MD5object), /*tp_basicsize*/
|
|
0, /*tp_itemsize*/
|
|
/* methods */
|
|
MD5_dealloc, /*tp_dealloc*/
|
|
0, /*tp_print*/
|
|
0, /*tp_getattr*/
|
|
0, /*tp_setattr*/
|
|
0, /*tp_reserved*/
|
|
0, /*tp_repr*/
|
|
0, /*tp_as_number*/
|
|
0, /*tp_as_sequence*/
|
|
0, /*tp_as_mapping*/
|
|
0, /*tp_hash*/
|
|
0, /*tp_call*/
|
|
0, /*tp_str*/
|
|
0, /*tp_getattro*/
|
|
0, /*tp_setattro*/
|
|
0, /*tp_as_buffer*/
|
|
Py_TPFLAGS_DEFAULT, /*tp_flags*/
|
|
0, /*tp_doc*/
|
|
0, /*tp_traverse*/
|
|
0, /*tp_clear*/
|
|
0, /*tp_richcompare*/
|
|
0, /*tp_weaklistoffset*/
|
|
0, /*tp_iter*/
|
|
0, /*tp_iternext*/
|
|
MD5_methods, /* tp_methods */
|
|
NULL, /* tp_members */
|
|
MD5_getseters, /* tp_getset */
|
|
};
|
|
|
|
|
|
/* The single module-level function: new() */
|
|
|
|
/*[clinic input]
|
|
_md5.md5
|
|
|
|
string: object(c_default="NULL") = b''
|
|
|
|
Return a new MD5 hash object; optionally initialized with a string.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_md5_md5_impl(PyObject *module, PyObject *string)
|
|
/*[clinic end generated code: output=2cfd0f8c091b97e6 input=d12ef8f72d684f7b]*/
|
|
{
|
|
MD5object *new;
|
|
Py_buffer buf;
|
|
|
|
if (string)
|
|
GET_BUFFER_VIEW_OR_ERROUT(string, &buf);
|
|
|
|
if ((new = newMD5object()) == NULL) {
|
|
if (string)
|
|
PyBuffer_Release(&buf);
|
|
return NULL;
|
|
}
|
|
|
|
md5_init(&new->hash_state);
|
|
|
|
if (PyErr_Occurred()) {
|
|
Py_DECREF(new);
|
|
if (string)
|
|
PyBuffer_Release(&buf);
|
|
return NULL;
|
|
}
|
|
if (string) {
|
|
md5_process(&new->hash_state, buf.buf, buf.len);
|
|
PyBuffer_Release(&buf);
|
|
}
|
|
|
|
return (PyObject *)new;
|
|
}
|
|
|
|
|
|
/* List of functions exported by this module */
|
|
|
|
static struct PyMethodDef MD5_functions[] = {
|
|
_MD5_MD5_METHODDEF
|
|
{NULL, NULL} /* Sentinel */
|
|
};
|
|
|
|
|
|
/* Initialize this module. */
|
|
|
|
#define insint(n,v) { PyModule_AddIntConstant(m,n,v); }
|
|
|
|
|
|
static struct PyModuleDef _md5module = {
|
|
PyModuleDef_HEAD_INIT,
|
|
"_md5",
|
|
NULL,
|
|
-1,
|
|
MD5_functions,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL
|
|
};
|
|
|
|
PyMODINIT_FUNC
|
|
PyInit__md5(void)
|
|
{
|
|
PyObject *m;
|
|
|
|
Py_TYPE(&MD5type) = &PyType_Type;
|
|
if (PyType_Ready(&MD5type) < 0)
|
|
return NULL;
|
|
|
|
m = PyModule_Create(&_md5module);
|
|
if (m == NULL)
|
|
return NULL;
|
|
|
|
Py_INCREF((PyObject *)&MD5type);
|
|
PyModule_AddObject(m, "MD5Type", (PyObject *)&MD5type);
|
|
return m;
|
|
}
|