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eb9610a102
closes #13 This prevents accidentally writing when reading is intended, and vice versa. It also allows specialising the APIs and constructors.
53 lines
1.5 KiB
PHP
53 lines
1.5 KiB
PHP
--TEST--
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read(Un)SignedVar(Int|Long)() must terminate when too many bytes are given
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--DESCRIPTION--
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VarInt reading works by checking if the MSB (most significant bit) is set on the current byte.
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If it is, it reads another byte.
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However, this means that it's possible for a string of bytes longer than the max size of a varint/varlong to appear,
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potentially locking up the read for a long time if the max number of bytes isn't capped.
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This test verifies that the varint reader functions bail out if there are too many consecutive bytes with MSB set.
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--EXTENSIONS--
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encoding
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--FILE--
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<?php
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use pmmp\encoding\ByteBufferReader;
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use pmmp\encoding\DataDecodeException;
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use pmmp\encoding\VarInt;
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$shortBuf = str_repeat("\x80", 6);
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$longBuf = str_repeat("\x80", 11);
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try{
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VarInt::readUnsignedInt(new ByteBufferReader($shortBuf));
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}catch(DataDecodeException $e){
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echo "uv32: " . $e->getMessage() . PHP_EOL;
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}
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try{
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VarInt::readSignedInt(new ByteBufferReader($shortBuf));
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}catch(DataDecodeException $e){
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echo "sv32: " . $e->getMessage() . PHP_EOL;
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}
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try{
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VarInt::readUnsignedLong(new ByteBufferReader($longBuf));
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}catch(DataDecodeException $e){
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echo "uv64: " . $e->getMessage() . PHP_EOL;
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}
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try{
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VarInt::readSignedLong(new ByteBufferReader($longBuf));
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}catch(DataDecodeException $e){
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echo "sv64: " . $e->getMessage() . PHP_EOL;
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}
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?>
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--EXPECT--
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uv32: VarInt did not terminate after 5 bytes!
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sv32: VarInt did not terminate after 5 bytes!
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uv64: VarInt did not terminate after 10 bytes!
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sv64: VarInt did not terminate after 10 bytes!
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