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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,75 @@ | ||
| /* crypt.h -- base code for crypt/uncrypt ZIPfile | ||
| Version 1.01e, February 12th, 2005 | ||
| Copyright (C) 1998-2005 Gilles Vollant | ||
| This code is a modified version of crypting code in Infozip distribution | ||
| The encryption/decryption parts of this source code (as opposed to the | ||
| non-echoing password parts) were originally written in Europe. The | ||
| whole source package can be freely distributed, including from the USA. | ||
| (Prior to January 2000, re-export from the US was a violation of US law.) | ||
| This encryption code is a direct transcription of the algorithm from | ||
| Roger Schlafly, described by Phil Katz in the file appnote.txt. This | ||
| file (appnote.txt) is distributed with the PKZIP program (even in the | ||
| version without encryption capabilities). | ||
| If you don't need crypting in your application, just define symbols | ||
| NOCRYPT and NOUNCRYPT. | ||
| This code support the "Traditional PKWARE Encryption". | ||
| The new AES encryption added on Zip format by Winzip (see the page | ||
| http://www.winzip.com/aes_info.htm ) and PKWare PKZip 5.x Strong | ||
| Encryption is not supported. | ||
| */ | ||
|
|
||
| #define CRC32(c, b) ((*(pcrc_32_tab+(((int)(c) ^ (b)) & 0xff))) ^ ((c) >> 8)) | ||
|
|
||
| /***************************************************************************/ | ||
| /* Return the next byte in the pseudo-random sequence */ | ||
|
|
||
| static int decrypt_byte(unsigned long* pkeys, const z_crc_t* pcrc_32_tab) { | ||
| unsigned temp; /* POTENTIAL BUG: temp*(temp^1) may overflow in an | ||
| * unpredictable manner on 16-bit systems; not a problem | ||
| * with any known compiler so far, though */ | ||
|
|
||
| (void)pcrc_32_tab; | ||
| temp = ((unsigned)(*(pkeys+2)) & 0xffff) | 2; | ||
| return (int)(((temp * (temp ^ 1)) >> 8) & 0xff); | ||
| } | ||
|
|
||
| /***************************************************************************/ | ||
| /* Update the encryption keys with the next byte of plain text */ | ||
|
|
||
| static int update_keys(unsigned long* pkeys, const z_crc_t* pcrc_32_tab, int c) { | ||
| (*(pkeys+0)) = CRC32((*(pkeys+0)), c); | ||
| (*(pkeys+1)) += (*(pkeys+0)) & 0xff; | ||
| (*(pkeys+1)) = (*(pkeys+1)) * 134775813L + 1; | ||
| { | ||
| register int keyshift = (int)((*(pkeys+1)) >> 24); | ||
| (*(pkeys+2)) = CRC32((*(pkeys+2)), keyshift); | ||
| } | ||
| return c; | ||
| } | ||
|
|
||
|
|
||
| /***************************************************************************/ | ||
| /* Initialize the encryption keys and the random header according to the password. */ | ||
|
|
||
| static void init_keys(const char* passwd, unsigned long* pkeys, const z_crc_t* pcrc_32_tab) { | ||
| *(pkeys+0) = 305419896L; | ||
| *(pkeys+1) = 591751049L; | ||
| *(pkeys+2) = 878082192L; | ||
| while (*passwd != '\0') { | ||
| update_keys(pkeys,pcrc_32_tab,(int)*passwd); | ||
| passwd++; | ||
| } | ||
| } | ||
|
|
||
| #define zdecode(pkeys,pcrc_32_tab,c) \ | ||
| (update_keys(pkeys,pcrc_32_tab,c ^= decrypt_byte(pkeys,pcrc_32_tab))) | ||
|
|
||
| #define zencode(pkeys,pcrc_32_tab,c,t) \ | ||
| (t=decrypt_byte(pkeys,pcrc_32_tab), update_keys(pkeys,pcrc_32_tab,c), (Byte)t^(c)) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,263 @@ | ||
| #include "mz.h" | ||
| #include "mz_strm.h" | ||
| #include "mz_strm_mem.h" | ||
|
|
||
| #include "ioapi.h" | ||
|
|
||
| typedef struct mz_stream_ioapi_s { | ||
| mz_stream stream; | ||
| void *handle; | ||
| zlib_filefunc_def filefunc; | ||
| zlib_filefunc64_def filefunc64; | ||
| } mz_stream_ioapi; | ||
|
|
||
| /***************************************************************************/ | ||
|
|
||
| static int32_t mz_stream_ioapi_open(void *stream, const char *path, int32_t mode); | ||
| static int32_t mz_stream_ioapi_is_open(void *stream); | ||
| static int32_t mz_stream_ioapi_read(void *stream, void *buf, int32_t size); | ||
| static int32_t mz_stream_ioapi_write(void *stream, const void *buf, int32_t size); | ||
| static int64_t mz_stream_ioapi_tell(void *stream); | ||
| static int32_t mz_stream_ioapi_seek(void *stream, int64_t offset, int32_t origin); | ||
| static int32_t mz_stream_ioapi_close(void *stream); | ||
| static int32_t mz_stream_ioapi_error(void *stream); | ||
|
|
||
| /***************************************************************************/ | ||
|
|
||
| static mz_stream_vtbl mz_stream_ioapi_vtbl = { | ||
| mz_stream_ioapi_open, | ||
| mz_stream_ioapi_is_open, | ||
| mz_stream_ioapi_read, | ||
| mz_stream_ioapi_write, | ||
| mz_stream_ioapi_tell, | ||
| mz_stream_ioapi_seek, | ||
| mz_stream_ioapi_close, | ||
| mz_stream_ioapi_error, | ||
| mz_stream_ioapi_create, | ||
| mz_stream_ioapi_delete, | ||
| NULL, | ||
| NULL | ||
| }; | ||
|
|
||
| /***************************************************************************/ | ||
|
|
||
| static int32_t mz_stream_ioapi_open(void *stream, const char *path, int32_t mode) { | ||
| mz_stream_ioapi *ioapi = (mz_stream_ioapi *)stream; | ||
| int32_t ioapi_mode = 0; | ||
|
|
||
| if ((mode & MZ_OPEN_MODE_READWRITE) == MZ_OPEN_MODE_READ) | ||
| ioapi_mode = ZLIB_FILEFUNC_MODE_READ; | ||
| else if (mode & MZ_OPEN_MODE_APPEND) | ||
| ioapi_mode = ZLIB_FILEFUNC_MODE_EXISTING; | ||
| else if (mode & MZ_OPEN_MODE_CREATE) | ||
| ioapi_mode = ZLIB_FILEFUNC_MODE_CREATE; | ||
| else | ||
| return MZ_OPEN_ERROR; | ||
|
|
||
| if (ioapi->filefunc64.zopen64_file) | ||
| ioapi->handle = ioapi->filefunc64.zopen64_file(ioapi->filefunc64.opaque, path, ioapi_mode); | ||
| else if (ioapi->filefunc.zopen_file) | ||
| ioapi->handle = ioapi->filefunc.zopen_file(ioapi->filefunc.opaque, path, ioapi_mode); | ||
|
|
||
| if (!ioapi->handle) | ||
| return MZ_PARAM_ERROR; | ||
|
|
||
| return MZ_OK; | ||
| } | ||
|
|
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| static int32_t mz_stream_ioapi_is_open(void *stream) { | ||
| mz_stream_ioapi *ioapi = (mz_stream_ioapi *)stream; | ||
| if (!ioapi->handle) | ||
| return MZ_OPEN_ERROR; | ||
| return MZ_OK; | ||
| } | ||
|
|
||
| static int32_t mz_stream_ioapi_read(void *stream, void *buf, int32_t size) { | ||
| mz_stream_ioapi *ioapi = (mz_stream_ioapi *)stream; | ||
| read_file_func zread = NULL; | ||
| void *opaque = NULL; | ||
|
|
||
| if (mz_stream_ioapi_is_open(stream) != MZ_OK) | ||
| return MZ_OPEN_ERROR; | ||
|
|
||
| if (ioapi->filefunc64.zread_file) { | ||
| zread = ioapi->filefunc64.zread_file; | ||
| opaque = ioapi->filefunc64.opaque; | ||
| } else if (ioapi->filefunc.zread_file) { | ||
| zread = ioapi->filefunc.zread_file; | ||
| opaque = ioapi->filefunc.opaque; | ||
| } else | ||
| return MZ_PARAM_ERROR; | ||
|
|
||
| return (int32_t)zread(opaque, ioapi->handle, buf, size); | ||
| } | ||
|
|
||
| static int32_t mz_stream_ioapi_write(void *stream, const void *buf, int32_t size) { | ||
| mz_stream_ioapi *ioapi = (mz_stream_ioapi *)stream; | ||
| write_file_func zwrite = NULL; | ||
| int32_t written = 0; | ||
| void *opaque = NULL; | ||
|
|
||
| if (mz_stream_ioapi_is_open(stream) != MZ_OK) | ||
| return MZ_OPEN_ERROR; | ||
|
|
||
| if (ioapi->filefunc64.zwrite_file) { | ||
| zwrite = ioapi->filefunc64.zwrite_file; | ||
| opaque = ioapi->filefunc64.opaque; | ||
| } else if (ioapi->filefunc.zwrite_file) { | ||
| zwrite = ioapi->filefunc.zwrite_file; | ||
| opaque = ioapi->filefunc.opaque; | ||
| } else | ||
| return MZ_PARAM_ERROR; | ||
|
|
||
| written = (int32_t)zwrite(opaque, ioapi->handle, buf, size); | ||
| return written; | ||
| } | ||
|
|
||
| static int64_t mz_stream_ioapi_tell(void *stream) { | ||
| mz_stream_ioapi *ioapi = (mz_stream_ioapi *)stream; | ||
|
|
||
| if (mz_stream_ioapi_is_open(stream) != MZ_OK) | ||
| return MZ_OPEN_ERROR; | ||
|
|
||
| if (ioapi->filefunc64.ztell64_file) | ||
| return ioapi->filefunc64.ztell64_file(ioapi->filefunc64.opaque, ioapi->handle); | ||
| else if (ioapi->filefunc.ztell_file) | ||
| return ioapi->filefunc.ztell_file(ioapi->filefunc.opaque, ioapi->handle); | ||
|
|
||
| return MZ_INTERNAL_ERROR; | ||
| } | ||
|
|
||
| static int32_t mz_stream_ioapi_seek(void *stream, int64_t offset, int32_t origin) { | ||
| mz_stream_ioapi *ioapi = (mz_stream_ioapi *)stream; | ||
|
|
||
| if (mz_stream_ioapi_is_open(stream) != MZ_OK) | ||
| return MZ_OPEN_ERROR; | ||
|
|
||
| if (ioapi->filefunc64.zseek64_file) { | ||
| if (ioapi->filefunc64.zseek64_file(ioapi->filefunc64.opaque, ioapi->handle, offset, origin) != 0) | ||
| return MZ_INTERNAL_ERROR; | ||
| } else if (ioapi->filefunc.zseek_file) { | ||
| if (ioapi->filefunc.zseek_file(ioapi->filefunc.opaque, ioapi->handle, (int32_t)offset, origin) != 0) | ||
| return MZ_INTERNAL_ERROR; | ||
| } else | ||
| return MZ_PARAM_ERROR; | ||
|
|
||
| return MZ_OK; | ||
| } | ||
|
|
||
| static int32_t mz_stream_ioapi_close(void *stream) { | ||
| mz_stream_ioapi *ioapi = (mz_stream_ioapi *)stream; | ||
| close_file_func zclose = NULL; | ||
| void *opaque = NULL; | ||
|
|
||
| if (mz_stream_ioapi_is_open(stream) != MZ_OK) | ||
| return MZ_OPEN_ERROR; | ||
|
|
||
| if (ioapi->filefunc.zclose_file) { | ||
| zclose = ioapi->filefunc.zclose_file; | ||
| opaque = ioapi->filefunc.opaque; | ||
| } else if (ioapi->filefunc64.zclose_file) { | ||
| zclose = ioapi->filefunc64.zclose_file; | ||
| opaque = ioapi->filefunc64.opaque; | ||
| } else | ||
| return MZ_PARAM_ERROR; | ||
|
|
||
| if (zclose(opaque, ioapi->handle) != 0) | ||
| return MZ_CLOSE_ERROR; | ||
| ioapi->handle = NULL; | ||
| return MZ_OK; | ||
| } | ||
|
|
||
| static int32_t mz_stream_ioapi_error(void *stream) { | ||
| mz_stream_ioapi *ioapi = (mz_stream_ioapi *)stream; | ||
| testerror_file_func zerror = NULL; | ||
| void *opaque = NULL; | ||
|
|
||
| if (mz_stream_ioapi_is_open(stream) != MZ_OK) | ||
| return MZ_OPEN_ERROR; | ||
|
|
||
| if (ioapi->filefunc.zerror_file) { | ||
| zerror = ioapi->filefunc.zerror_file; | ||
| opaque = ioapi->filefunc.opaque; | ||
| } else if (ioapi->filefunc64.zerror_file) { | ||
| zerror = ioapi->filefunc64.zerror_file; | ||
| opaque = ioapi->filefunc64.opaque; | ||
| } else | ||
| return MZ_PARAM_ERROR; | ||
|
|
||
| return zerror(opaque, ioapi->handle); | ||
| } | ||
|
|
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| int32_t mz_stream_ioapi_set_filefunc(void *stream, zlib_filefunc_def *filefunc) { | ||
| mz_stream_ioapi *ioapi = (mz_stream_ioapi *)stream; | ||
| memcpy(&ioapi->filefunc, filefunc, sizeof(zlib_filefunc_def)); | ||
| return MZ_OK; | ||
| } | ||
|
|
||
| int32_t mz_stream_ioapi_set_filefunc64(void *stream, zlib_filefunc64_def *filefunc) { | ||
| mz_stream_ioapi *ioapi = (mz_stream_ioapi *)stream; | ||
| memcpy(&ioapi->filefunc64, filefunc, sizeof(zlib_filefunc64_def)); | ||
| return MZ_OK; | ||
| } | ||
|
|
||
| void *mz_stream_ioapi_create(void) { | ||
| mz_stream_ioapi *ioapi = (mz_stream_ioapi *)calloc(1, sizeof(mz_stream_ioapi)); | ||
| if (ioapi) | ||
| ioapi->stream.vtbl = &mz_stream_ioapi_vtbl; | ||
| return ioapi; | ||
| } | ||
|
|
||
| void mz_stream_ioapi_delete(void **stream) { | ||
| mz_stream_ioapi *ioapi = NULL; | ||
| if (!stream) | ||
| return; | ||
| ioapi = (mz_stream_ioapi *)*stream; | ||
| if (ioapi) | ||
| free(ioapi); | ||
| *stream = NULL; | ||
| } | ||
|
|
||
| /***************************************************************************/ | ||
|
|
||
| void fill_fopen_filefunc(zlib_filefunc_def *pzlib_filefunc_def) { | ||
| /* For 32-bit file support only, compile with MZ_FILE32_API */ | ||
| if (pzlib_filefunc_def) | ||
| memset(pzlib_filefunc_def, 0, sizeof(zlib_filefunc_def)); | ||
| } | ||
|
|
||
| void fill_fopen64_filefunc(zlib_filefunc64_def *pzlib_filefunc_def) { | ||
| /* All mz_stream_os_* support large files if compilation supports it */ | ||
| if (pzlib_filefunc_def) | ||
| memset(pzlib_filefunc_def, 0, sizeof(zlib_filefunc64_def)); | ||
| } | ||
|
|
||
| void fill_win32_filefunc(zlib_filefunc_def *pzlib_filefunc_def) { | ||
| /* Handled by mz_stream_os_win32 */ | ||
| if (pzlib_filefunc_def) | ||
| memset(pzlib_filefunc_def, 0, sizeof(zlib_filefunc_def)); | ||
| } | ||
|
|
||
| void fill_win32_filefunc64(zlib_filefunc64_def *pzlib_filefunc_def) { | ||
| /* Automatically supported in mz_stream_os_win32 */ | ||
| if (pzlib_filefunc_def) | ||
| memset(pzlib_filefunc_def, 0, sizeof(zlib_filefunc64_def)); | ||
| } | ||
|
|
||
| void fill_win32_filefunc64A(zlib_filefunc64_def *pzlib_filefunc_def) { | ||
| /* Automatically supported in mz_stream_os_win32 */ | ||
| if (pzlib_filefunc_def) | ||
| memset(pzlib_filefunc_def, 0, sizeof(zlib_filefunc64_def)); | ||
| } | ||
|
|
||
| /* NOTE: fill_win32_filefunc64W is no longer necessary since wide-character | ||
| support is automatically handled by the underlying os stream. Do not | ||
| pass wide-characters to zipOpen or unzOpen. */ | ||
|
|
||
| void fill_memory_filefunc(zlib_filefunc_def *pzlib_filefunc_def) { | ||
| /* Use opaque to indicate which stream interface to create */ | ||
| if (pzlib_filefunc_def) { | ||
| memset(pzlib_filefunc_def, 0, sizeof(zlib_filefunc_def)); | ||
| pzlib_filefunc_def->opaque = mz_stream_mem_get_interface(); | ||
| } | ||
| } | ||
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