roba1993 / rar Goto Github PK

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Rust RAR archive crate

License: MIT License

Rust 100.00%

extract-archive extract-compression rar rar-archives rar-format rar-rust rust

rar's People

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lingman atul9 mcronce kestein ave9858 redstonewizard08

rar's Issues

extracting encrypted files

How I can extract them? Is there support for this?

`nom::be_u32` is used instead of the `nom::le_u32`

According to the original unrar sources Little-endian should be used there:

RAR/src/head_block.rs

Lines 152 to 161 in b84da66

 /// get a base header 

 named!(base_header(&[u8]) -> (HeadBlock), 

 do_parse!( 

 crc: be_u32 >> 

 size: vint >> 

 typ: vint >> 

 flags: vint >> 

 (HeadBlock::new(crc, size, typ.into(), flags.into())) 

 ) 

 );

RAR/src/file_block.rs

Lines 68 to 79 in b84da66

 if file.flags.time { 

 let (i, mtime) = be_u32(input)?; 

 input = i; 

 file.mtime = mtime; 

 } 

 // check for file crc data 

 if file.flags.crc { 

 let (i, crc) = be_u32(input)?; 

 input = i; 

 file.data_crc = crc; 

 }

`FileEncryptionBlock` doesn't contain the `init` member

According to the original code of the unrar utility, initialization vectors are located before each encrypted block (and all blocks are encrypted after occurrence of the FileEncryptionBlock).

FileEncryptionBlock (in the original that block is called CRYPT block) doesn't contain the initialization vector, so this code is wrong:

RAR/src/extra_block.rs

Lines 217 to 222 in 954bd98

 // parse salt value 

 let (inp, salt) = take!(inp, 16)?; 

 // parse init value 

 let (mut inp, init) = take!(inp, 16)?; 

 // parse pw check value 

 let mut pw_check = [0; 12];

Lines 219-220 should be removed.

roba1993 / rar Goto Github PK

rar's People

Contributors

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rar's Issues

extracting encrypted files

`nom::be_u32` is used instead of the `nom::le_u32`

`FileEncryptionBlock` doesn't contain the `init` member

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	/// get a base header
	named!(base_header(&[u8]) -> (HeadBlock),
	do_parse!(
	crc: be_u32 >>
	size: vint >>
	typ: vint >>
	flags: vint >>
	(HeadBlock::new(crc, size, typ.into(), flags.into()))
	)
	);

	if file.flags.time {
	let (i, mtime) = be_u32(input)?;
	input = i;
	file.mtime = mtime;
	}

	// check for file crc data
	if file.flags.crc {
	let (i, crc) = be_u32(input)?;
	input = i;
	file.data_crc = crc;
	}

	// parse salt value
	let (inp, salt) = take!(inp, 16)?;
	// parse init value
	let (mut inp, init) = take!(inp, 16)?;
	// parse pw check value
	let mut pw_check = [0; 12];