commit c71f9997bd9dc316b9ee941486d608ee01552fc0
Author: gered <gered@blarg.ca>
Date:   Sat May 15 14:47:19 2021 -0400

    initial commit
    
    starting conversion of these tools over to rust. ported fuzziqer
    encryption and prs compression routines over

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..5ab7a50
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+/.idea
+/target
+Cargo.lock
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..2598b41
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,5 @@
+[workspace]
+
+members = [
+    "psoutils",
+]
diff --git a/psoutils/Cargo.toml b/psoutils/Cargo.toml
new file mode 100644
index 0000000..80cf60e
--- /dev/null
+++ b/psoutils/Cargo.toml
@@ -0,0 +1,18 @@
+[package]
+name = "psoutils"
+version = "0.1.0"
+authors = ["gered <gered@blarg.ca>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+byte-slice-cast = "0.3.5"
+byteorder = "1.4.3"
+thiserror = "1.0.24"
+encoding_rs = "0.8.28"
+
+[dev-dependencies]
+claim = "0.5.0"
+pretty-hex = "0.2.1"
+tempfile = "3.2.0"
diff --git a/psoutils/src/compression.rs b/psoutils/src/compression.rs
new file mode 100644
index 0000000..1ee494e
--- /dev/null
+++ b/psoutils/src/compression.rs
@@ -0,0 +1,655 @@
+struct Context {
+    bitpos: u8,
+    forward_log: Vec<u8>,
+    output: Vec<u8>,
+}
+
+impl Context {
+    pub fn new() -> Context {
+        // tiny bug from the fuzziqer implementation? it never really initializes the forward log
+        // anywhere (except, in newserv, as a zero-length std::string) and will ALWAYS start doing
+        // some bit twiddling on the first byte before it ever actually explicitly adds the first
+        // byte to the forward log ...
+        let mut forward_log = Vec::new();
+        forward_log.push(0);
+
+        Context {
+            bitpos: 0,
+            forward_log,
+            output: Vec::new(),
+        }
+    }
+
+    pub fn put_control_bit_nosave(&mut self, bit: bool) {
+        self.forward_log[0] >>= 1;
+        self.forward_log[0] |= (bit as u8) << 7;
+        self.bitpos += 1;
+    }
+
+    pub fn put_control_save(&mut self) {
+        if self.bitpos >= 8 {
+            self.bitpos = 0;
+            self.output.append(&mut self.forward_log);
+            self.forward_log.resize(1, 0);
+            self.forward_log[0] = 0;
+        }
+    }
+
+    pub fn put_static_data(&mut self, data: u8) {
+        self.forward_log.push(data);
+    }
+
+    pub fn put_control_bit(&mut self, bit: bool) {
+        self.put_control_bit_nosave(bit);
+        self.put_control_save();
+    }
+
+    pub fn raw_byte(&mut self, value: u8) {
+        self.put_control_bit_nosave(true);
+        self.put_static_data(value);
+        self.put_control_save();
+    }
+
+    pub fn short_copy(&mut self, offset: isize, size: u8) {
+        let size = size - 2;
+        self.put_control_bit(false);
+        self.put_control_bit(false);
+        self.put_control_bit((size >> 1) & 1 == 1);
+        self.put_control_bit_nosave(size & 1 == 1);
+        self.put_static_data((offset & 0xff) as u8);
+        self.put_control_save();
+    }
+
+    pub fn long_copy(&mut self, offset: isize, size: u8) {
+        if size <= 9 {
+            self.put_control_bit(false);
+            self.put_control_bit_nosave(true);
+            self.put_static_data((((offset << 3) & 0xf8) as u8) | ((size - 2) & 0x07));
+            self.put_static_data(((offset >> 5) & 0xff) as u8);
+            self.put_control_save();
+        } else {
+            self.put_control_bit(false);
+            self.put_control_bit_nosave(true);
+            self.put_static_data(((offset << 3) & 0xf8) as u8);
+            self.put_static_data(((offset >> 5) & 0xff) as u8);
+            self.put_static_data(size - 1);
+            self.put_control_save();
+        }
+    }
+
+    pub fn copy(&mut self, offset: isize, size: u8) {
+        if (offset > -0x100) && (size <= 5) {
+            self.short_copy(offset, size);
+        } else {
+            self.long_copy(offset, size);
+        }
+    }
+
+    pub fn finish(mut self) -> Box<[u8]> {
+        self.put_control_bit(false);
+        self.put_control_bit(true);
+        if self.bitpos != 0 {
+            self.forward_log[0] =
+                (((self.forward_log[0] as u32) << (self.bitpos as u32)) >> 8) as u8;
+        };
+        self.put_static_data(0);
+        self.put_static_data(0);
+        self.output.append(&mut self.forward_log);
+        self.output.into_boxed_slice()
+    }
+}
+
+fn is_mem_equal(base: &[u8], offset1: isize, offset2: isize, length: usize) -> bool {
+    // the fuzziqer prs compression implementation performs memcmp's that check memory slightly
+    // outside of the buffers it is working with fairly often actually, despite the checks it
+    // does in the main prs_compress loops ... ugh
+    if offset1 < 0 || offset2 < 0 {
+        false
+    } else {
+        let offset1 = offset1 as usize;
+        let offset2 = offset2 as usize;
+        if ((offset1 + length) > base.len()) || ((offset2 + length) > base.len()) {
+            false
+        } else {
+            base[offset1..(offset1 + length)] == base[offset2..(offset2 + length)]
+        }
+    }
+}
+
+pub fn prs_compress(source: &[u8]) -> Box<[u8]> {
+    let mut pc = Context::new();
+
+    let mut x: isize = 0;
+    while x < (source.len() as isize) {
+        let mut lsoffset: isize = 0;
+        let mut lssize: isize = 0;
+        let mut xsize: usize = 0;
+
+        let mut y: isize = x - 3;
+        while (y > 0) && (y > (x - 0x1ff0)) && (xsize < 255) {
+            xsize = 3;
+            if is_mem_equal(source, y as isize, x as isize, xsize) {
+                xsize += 1;
+                while (xsize < 256)
+                    && ((y + xsize as isize) < x)
+                    && ((x + xsize as isize) <= (source.len() as isize))
+                    && is_mem_equal(source, y as isize, x as isize, xsize)
+                {
+                    xsize += 1;
+                }
+                xsize -= 1;
+
+                if (xsize as isize) > lssize {
+                    lsoffset = -(x - y);
+                    lssize = xsize as isize;
+                }
+            }
+            y -= 1;
+        }
+
+        if lssize == 0 {
+            pc.raw_byte(source[x as usize]);
+        } else {
+            pc.copy(lsoffset, lssize as u8);
+            x += lssize - 1;
+        }
+
+        x += 1;
+    }
+
+    pc.finish()
+}
+
+enum Next {
+    Byte(u8),
+    Eof(),
+}
+
+struct ByteReader<'a> {
+    source: &'a [u8],
+    offset: usize,
+}
+
+impl<'a> ByteReader<'a> {
+    pub fn new(source: &[u8]) -> ByteReader {
+        ByteReader { source, offset: 0 }
+    }
+
+    pub fn next(&mut self) -> Next {
+        if self.offset <= self.source.len() {
+            let result = Next::Byte(self.source[self.offset]);
+            self.offset += 1;
+            result
+        } else {
+            Next::Eof()
+        }
+    }
+}
+
+pub fn prs_decompress(source: &[u8]) -> Box<[u8]> {
+    let mut output = Vec::new();
+    let mut reader = ByteReader::new(source);
+    let mut r3: i32;
+    let mut r5: i32;
+    let mut bitpos = 9;
+    let mut current_byte: u8;
+    let mut flag: bool;
+    let mut offset: i32;
+
+    current_byte = match reader.next() {
+        Next::Byte(byte) => byte,
+        Next::Eof() => return output.into_boxed_slice(),
+    };
+
+    loop {
+        bitpos -= 1;
+        if bitpos == 0 {
+            current_byte = match reader.next() {
+                Next::Byte(byte) => byte,
+                Next::Eof() => return output.into_boxed_slice(),
+            };
+            bitpos = 8;
+        }
+
+        flag = (current_byte & 1) == 1;
+        current_byte >>= 1;
+        if flag {
+            output.push(match reader.next() {
+                Next::Byte(byte) => byte,
+                Next::Eof() => return output.into_boxed_slice(),
+            });
+            continue;
+        }
+
+        bitpos -= 1;
+        if bitpos == 0 {
+            current_byte = match reader.next() {
+                Next::Byte(byte) => byte,
+                Next::Eof() => return output.into_boxed_slice(),
+            };
+            bitpos = 8;
+        }
+
+        flag = (current_byte & 1) == 1;
+        current_byte >>= 1;
+        if flag {
+            r3 = match reader.next() {
+                Next::Byte(byte) => byte as i32,
+                Next::Eof() => return output.into_boxed_slice(),
+            };
+            let high_byte = match reader.next() {
+                Next::Byte(byte) => byte as i32,
+                Next::Eof() => return output.into_boxed_slice(),
+            };
+            offset = ((high_byte & 0xff) << 8) | (r3 & 0xff);
+            if offset == 0 {
+                return output.into_boxed_slice();
+            }
+            r3 &= 0x00000007;
+            r5 = (offset >> 3) | -8192i32; // 0xffffe000
+            if r3 == 0 {
+                r3 = match reader.next() {
+                    Next::Byte(byte) => byte as i32,
+                    Next::Eof() => return output.into_boxed_slice(),
+                };
+                r3 = (r3 & 0xff) + 1;
+            } else {
+                r3 += 2;
+            }
+        } else {
+            r3 = 0;
+            for _ in 0..2 {
+                bitpos -= 1;
+                if bitpos == 0 {
+                    current_byte = match reader.next() {
+                        Next::Byte(byte) => byte,
+                        Next::Eof() => return output.into_boxed_slice(),
+                    };
+                    bitpos = 8;
+                }
+                flag = (current_byte & 1) == 1;
+                current_byte >>= 1;
+                offset = r3 << 1;
+                r3 = offset | (flag as i32);
+            }
+            offset = match reader.next() {
+                Next::Byte(byte) => byte as i32,
+                Next::Eof() => return output.into_boxed_slice(),
+            };
+            r3 += 2;
+            r5 = offset | -256i32; // 0xffffff00
+        }
+        if r3 == 0 {
+            continue;
+        }
+        for _ in 0..r3 {
+            let index = output.len() as i32 + r5;
+            output.push(output[index as usize]);
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    struct TestData<'a> {
+        uncompressed: &'a [u8],
+        compressed: &'a [u8],
+    }
+
+    static TEST_DATA: &[TestData] = &[
+        TestData {
+            uncompressed: "Hello, world!\0".as_bytes(),
+            compressed: &[
+                0xff, 0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x2c, 0x20, 0x77, 0xbf, 0x6f, 0x72, 0x6c, 0x64,
+                0x21, 0x00, 0x00, 0x00, 0x00,
+            ],
+        },
+        TestData {
+            uncompressed: "I am Sam
+
+Sam I am
+
+That Sam-I-am!
+That Sam-I-am!
+I do not like
+that Sam-I-am!
+
+Do you like green eggs and ham?
+
+I do not like them, Sam-I-am.
+I do not like green eggs and ham."
+                .as_bytes(),
+            compressed: &[
+                0xff, 0x49, 0x20, 0x61, 0x6d, 0x20, 0x53, 0x61, 0x6d, 0xe3, 0x0a, 0x0a, 0xfb, 0x20,
+                0x49, 0xf8, 0xf2, 0x0a, 0x0a, 0x54, 0x68, 0xd3, 0x61, 0x74, 0xec, 0x2d, 0x49, 0xef,
+                0x2d, 0x61, 0x6d, 0x21, 0x88, 0xff, 0x0d, 0x21, 0x0a, 0xff, 0x49, 0x20, 0x64, 0x6f,
+                0x20, 0x6e, 0x6f, 0x74, 0x7f, 0x20, 0x6c, 0x69, 0x6b, 0x65, 0x0a, 0x74, 0xff, 0x18,
+                0xff, 0x0d, 0x0a, 0x44, 0x6f, 0x20, 0x79, 0x6f, 0x75, 0xfc, 0xe4, 0x20, 0x67, 0x72,
+                0x65, 0xff, 0x65, 0x6e, 0x20, 0x65, 0x67, 0x67, 0x73, 0x20, 0xff, 0x61, 0x6e, 0x64,
+                0x20, 0x68, 0x61, 0x6d, 0x3f, 0xfd, 0x0a, 0x08, 0xfe, 0x0d, 0x20, 0x74, 0x68, 0x65,
+                0x6d, 0xad, 0x2c, 0x07, 0xfe, 0x2e, 0x10, 0xff, 0x0e, 0xf8, 0xfd, 0x11, 0x05, 0x2e,
+                0x00, 0x00,
+            ],
+        },
+        TestData {
+            uncompressed: &[],
+            compressed: &[0x02, 0x00, 0x00],
+        },
+        TestData {
+            uncompressed: b"a",
+            compressed: &[0x05, 0x61, 0x00, 0x00],
+        },
+        TestData {
+            uncompressed: b"aa",
+            compressed: &[0x0b, 0x61, 0x61, 0x00, 0x00],
+        },
+        TestData {
+            uncompressed: b"aaa",
+            compressed: &[0x17, 0x61, 0x61, 0x61, 0x00, 0x00],
+        },
+        TestData {
+            uncompressed: b"aaaa",
+            compressed: &[0x2f, 0x61, 0x61, 0x61, 0x61, 0x00, 0x00],
+        },
+        TestData {
+            uncompressed: b"aaaaa",
+            compressed: &[0x5f, 0x61, 0x61, 0x61, 0x61, 0x61, 0x00, 0x00],
+        },
+        TestData {
+            uncompressed: b"aaaaaa",
+            compressed: &[0xbf, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x00, 0x00, 0x00],
+        },
+        TestData {
+            uncompressed: b"aaaaaaa",
+            compressed: &[0x8f, 0x61, 0x61, 0x61, 0x61, 0xfd, 0x02, 0x00, 0x00],
+        },
+        TestData {
+            uncompressed: b"aaaaaaaa",
+            compressed: &[0x8f, 0x61, 0x61, 0x61, 0x61, 0xfd, 0x05, 0x61, 0x00, 0x00],
+        },
+        TestData {
+            uncompressed: b"aaaaaaaaa",
+            compressed: &[
+                0x8f, 0x61, 0x61, 0x61, 0x61, 0xfd, 0x0b, 0x61, 0x61, 0x00, 0x00,
+            ],
+        },
+        TestData {
+            uncompressed: b"aaaaaaaaaa",
+            compressed: &[0x8f, 0x61, 0x61, 0x61, 0x61, 0xfd, 0x28, 0xfd, 0x00, 0x00],
+        },
+        TestData {
+            uncompressed: b"aaaaaaaaaaa",
+            compressed: &[0x8f, 0x61, 0x61, 0x61, 0x61, 0xfd, 0x24, 0xfb, 0x00, 0x00],
+        },
+        TestData {
+            uncompressed: b"aaaaaaaaaaaa",
+            compressed: &[0x8f, 0x61, 0x61, 0x61, 0x61, 0xfd, 0x2c, 0xfa, 0x00, 0x00],
+        },
+        TestData {
+            uncompressed: b"aaaaaaaaaaaaa",
+            compressed: &[
+                0x8f, 0x61, 0x61, 0x61, 0x61, 0xfd, 0x5c, 0xfa, 0x61, 0x00, 0x00,
+            ],
+        },
+        TestData {
+            uncompressed: b"aaaaaaaaaaaaaa",
+            compressed: &[
+                0x8f, 0x61, 0x61, 0x61, 0x61, 0xfd, 0xbc, 0xfa, 0x61, 0x61, 0x00, 0x00, 0x00,
+            ],
+        },
+        TestData {
+            uncompressed: b"aaaaaaaaaaaaaaa",
+            compressed: &[
+                0x8f, 0x61, 0x61, 0x61, 0x61, 0xfd, 0x8c, 0xfa, 0xfd, 0x02, 0x00, 0x00,
+            ],
+        },
+        TestData {
+            uncompressed: b"aaaaaaaaaaaaaaaa",
+            compressed: &[
+                0x8f, 0x61, 0x61, 0x61, 0x61, 0xfd, 0x4c, 0xfa, 0xfb, 0x02, 0x00, 0x00,
+            ],
+        },
+        TestData {
+            uncompressed: b"aaaaaaaaaaaaaaaaa",
+            compressed: &[
+                0x8f, 0x61, 0x61, 0x61, 0x61, 0xfd, 0xcc, 0xfa, 0xfa, 0x02, 0x00, 0x00,
+            ],
+        },
+        TestData {
+            uncompressed: &[0xff],
+            compressed: &[0x05, 0xff, 0x00, 0x00],
+        },
+        TestData {
+            uncompressed: &[0xff, 0xff],
+            compressed: &[0x0b, 0xff, 0xff, 0x00, 0x00],
+        },
+        TestData {
+            uncompressed: &[0xff, 0xff, 0xff],
+            compressed: &[0x17, 0xff, 0xff, 0xff, 0x00, 0x00],
+        },
+        TestData {
+            uncompressed: &[0xff, 0xff, 0xff, 0xff],
+            compressed: &[0x2f, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00],
+        },
+        TestData {
+            uncompressed: &[0xff, 0xff, 0xff, 0xff, 0xff],
+            compressed: &[0x5f, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00],
+        },
+        TestData {
+            uncompressed: &[0xff, 0xff, 0xff, 0xff, 0xff, 0xff],
+            compressed: &[0xbf, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00],
+        },
+        TestData {
+            uncompressed: &[0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff],
+            compressed: &[0x8f, 0xff, 0xff, 0xff, 0xff, 0xfd, 0x02, 0x00, 0x00],
+        },
+        TestData {
+            uncompressed: &[0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff],
+            compressed: &[0x8f, 0xff, 0xff, 0xff, 0xff, 0xfd, 0x05, 0xff, 0x00, 0x00],
+        },
+        TestData {
+            uncompressed: &[0x00],
+            compressed: &[0x05, 0x00, 0x00, 0x00],
+        },
+        TestData {
+            uncompressed: &[0x00, 0x00],
+            compressed: &[0x0b, 0x00, 0x00, 0x00, 0x00],
+        },
+        TestData {
+            uncompressed: &[0x00, 0x00, 0x00],
+            compressed: &[0x17, 0x00, 0x00, 0x00, 0x00, 0x00],
+        },
+        TestData {
+            uncompressed: &[0x00, 0x00, 0x00, 0x00],
+            compressed: &[0x2f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00],
+        },
+        TestData {
+            uncompressed: &[0x00, 0x00, 0x00, 0x00, 0x00],
+            compressed: &[0x5f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00],
+        },
+        // when comparing these results to the fuzziqer implementation, these zero-byte run tests
+        // start to get a little interesting from this point onward. at this point, the fuzziqer
+        // implementation will sometimes start to perform memcmp() calls that check memory slightly
+        // out of the bounds of its buffers, and when that memory also happens to contain zeros (as
+        // seems to always be the case for me right now), you get things like the 6 and 7 length
+        // zero-byte runs compressing identically (which is obviously a bug). this buggy behaviour
+        // carries on for some larger run sizes too, probably indefinitely.
+        TestData {
+            uncompressed: &[0x00, 0x00, 0x00, 0x00, 0x00, 0x00],
+            compressed: &[0xbf, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00],
+        },
+        TestData {
+            uncompressed: &[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00],
+            compressed: &[0x8f, 0x00, 0x00, 0x00, 0x00, 0xfd, 0x02, 0x00, 0x00],
+        },
+        TestData {
+            uncompressed: &[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00],
+            compressed: &[0x8f, 0x00, 0x00, 0x00, 0x00, 0xfd, 0x05, 0x00, 0x00, 0x00],
+        },
+        TestData {
+            uncompressed: &[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00],
+            compressed: &[
+                0x8f, 0x00, 0x00, 0x00, 0x00, 0xfd, 0x0b, 0x00, 0x00, 0x00, 0x00,
+            ],
+        },
+        TestData {
+            uncompressed: &[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00],
+            compressed: &[0x8f, 0x00, 0x00, 0x00, 0x00, 0xfd, 0x28, 0xfd, 0x00, 0x00],
+        },
+        TestData {
+            uncompressed: &[
+                0x04, 0x00, 0x02, 0x01, 0x05, 0x04, 0x08, 0x00, 0x04, 0x02, 0x07, 0x0d, 0x0c, 0x11,
+                0x02, 0x00, 0x03, 0x04, 0x04, 0x04, 0x03, 0x02, 0x09, 0x02, 0x03, 0x01, 0x0b, 0x0a,
+                0x0d, 0x0e, 0x04, 0x03, 0x03, 0x04, 0x02, 0x00, 0x07, 0x00, 0x08, 0x00, 0x03, 0x03,
+                0x0b, 0x0a, 0x0b, 0x10, 0x03, 0x03, 0x04, 0x02, 0x06, 0x04, 0x07, 0x03, 0x07, 0x04,
+                0x01, 0x03, 0x0a, 0x0c, 0x0c, 0x0f, 0x02, 0x04, 0x01, 0x04, 0x04, 0x02, 0x07, 0x02,
+                0x09, 0x04, 0x02, 0x03, 0x09, 0x0b, 0x0f, 0x0d, 0x02, 0x03, 0x04, 0x01, 0x02, 0x03,
+                0x04, 0x02, 0x05, 0x02, 0x00, 0x00, 0x0a, 0x0b, 0x0d, 0x0f, 0x03, 0x00, 0x01, 0x02,
+                0x02, 0x02, 0x07, 0x04, 0x09, 0x02, 0x00, 0x03, 0x08, 0x0a, 0x0c, 0x11, 0x04, 0x00,
+                0x00, 0x04, 0x03, 0x04, 0x06, 0x01, 0x06, 0x01, 0x03, 0x01, 0x07, 0x09, 0x0e, 0x10,
+                0x02, 0x01, 0x03, 0x04, 0x03, 0x02, 0x04, 0x00, 0x06, 0x01, 0x00, 0x03, 0x09, 0x0a,
+                0x0d, 0x10, 0x02, 0x04, 0x03, 0x03, 0x05, 0x03, 0x04, 0x02, 0x09, 0x04, 0x03, 0x04,
+                0x08, 0x0b, 0x0b, 0x0d, 0x00, 0x03, 0x00, 0x01, 0x04, 0x01, 0x06, 0x04, 0x09, 0x04,
+                0x04, 0x03, 0x07, 0x0a, 0x0c, 0x0f, 0x02, 0x01, 0x02, 0x03, 0x02, 0x03, 0x05, 0x01,
+                0x09, 0x00, 0x01, 0x02, 0x0b, 0x0c, 0x0e, 0x0d, 0x03, 0x00, 0x03, 0x00, 0x03, 0x02,
+                0x04, 0x02, 0x06, 0x00, 0x00, 0x01, 0x0a, 0x0c, 0x0c, 0x0e, 0x02, 0x03, 0x01, 0x02,
+                0x06, 0x03, 0x03, 0x00, 0x05, 0x03, 0x03, 0x02, 0x08, 0x0c, 0x0f, 0x0e, 0x03, 0x02,
+                0x02, 0x01, 0x06, 0x03, 0x03, 0x02, 0x06, 0x02, 0x04, 0x04, 0x07, 0x0b, 0x0b, 0x0f,
+                0x00, 0x01, 0x01, 0x01, 0x06, 0x04, 0x05, 0x02, 0x07, 0x02, 0x04, 0x04, 0x09, 0x0c,
+                0x0d, 0x0d, 0x00, 0x04, 0x03, 0x02, 0x02, 0x00, 0x07, 0x01, 0x07, 0x00, 0x00, 0x04,
+                0x09, 0x0c, 0x0f, 0x10, 0x04, 0x00, 0x01, 0x01, 0x06, 0x03, 0x03, 0x04, 0x07, 0x04,
+                0x03, 0x04, 0x09, 0x09, 0x0c, 0x11, 0x02, 0x01, 0x03, 0x04, 0x03, 0x03, 0x03, 0x03,
+                0x08, 0x02, 0x03, 0x01, 0x07, 0x0b, 0x0c, 0x0f, 0x04, 0x04, 0x00, 0x01, 0x02, 0x00,
+                0x03, 0x02, 0x09, 0x00, 0x04, 0x03, 0x09, 0x09, 0x0f, 0x0e, 0x02, 0x03, 0x00, 0x00,
+                0x03, 0x02, 0x04, 0x01, 0x05, 0x01, 0x04, 0x02, 0x07, 0x0b, 0x0f, 0x11, 0x02, 0x04,
+                0x02, 0x02, 0x03, 0x04, 0x07, 0x00, 0x09, 0x03, 0x00, 0x04, 0x08, 0x09, 0x0b, 0x0d,
+                0x03, 0x01, 0x00, 0x01, 0x02, 0x01, 0x05, 0x00, 0x07, 0x04, 0x03, 0x02, 0x08, 0x0d,
+                0x0f, 0x10, 0x01, 0x03, 0x00, 0x02, 0x05, 0x02, 0x03, 0x02, 0x07, 0x00, 0x03, 0x03,
+                0x09, 0x0d, 0x0b, 0x0f, 0x02, 0x01, 0x03, 0x02, 0x06, 0x03, 0x03, 0x04, 0x07, 0x00,
+                0x03, 0x03, 0x0b, 0x0b, 0x0f, 0x0f, 0x03, 0x01, 0x00, 0x01, 0x05, 0x02, 0x03, 0x03,
+                0x07, 0x04, 0x03, 0x02, 0x0a, 0x0d, 0x0f, 0x0d, 0x02, 0x00, 0x04, 0x01, 0x05, 0x04,
+                0x05, 0x02, 0x06, 0x01, 0x00, 0x03, 0x07, 0x0a, 0x0b, 0x10, 0x03, 0x02, 0x04, 0x03,
+                0x06, 0x00, 0x04, 0x04, 0x06, 0x00, 0x01, 0x04, 0x08, 0x09, 0x0c, 0x10, 0x00, 0x02,
+                0x01, 0x00, 0x04, 0x04, 0x05, 0x00, 0x07, 0x00, 0x03, 0x02, 0x08, 0x0d, 0x0e, 0x0e,
+                0x01, 0x04, 0x00, 0x01, 0x03, 0x01, 0x05, 0x02, 0x08, 0x03, 0x01, 0x04, 0x07, 0x0d,
+                0x0f, 0x10, 0x02, 0x01, 0x00, 0x01, 0x04, 0x03, 0x04, 0x04, 0x05, 0x00, 0x03, 0x01,
+                0x0b, 0x0c, 0x0b, 0x0f, 0x03, 0x00, 0x00, 0x04, 0x05, 0x02, 0x05, 0x02, 0x05, 0x00,
+                0x03, 0x03, 0x09, 0x09, 0x0e, 0x11, 0x03, 0x03, 0x00, 0x00, 0x03, 0x01, 0x04, 0x01,
+                0x08, 0x01, 0x00, 0x02, 0x07, 0x09, 0x0d, 0x10, 0x00, 0x02, 0x04, 0x00, 0x02, 0x01,
+                0x05, 0x02, 0x09, 0x03, 0x00, 0x01, 0x0a, 0x0c, 0x0d, 0x0e, 0x02, 0x02, 0x03, 0x00,
+                0x02, 0x04, 0x05, 0x01, 0x07, 0x04, 0x03, 0x02, 0x08, 0x09, 0x0b, 0x10, 0x03, 0x00,
+                0x03, 0x00, 0x05, 0x03, 0x05, 0x04, 0x06, 0x03, 0x02, 0x01, 0x0a, 0x0d, 0x0f, 0x0d,
+                0x01, 0x02, 0x03, 0x04, 0x05, 0x02, 0x03, 0x02, 0x06, 0x00, 0x00, 0x02, 0x0a, 0x0b,
+                0x0b, 0x10, 0x04, 0x00, 0x03, 0x03, 0x05, 0x02, 0x07, 0x01, 0x05, 0x02, 0x04, 0x01,
+                0x08, 0x0c, 0x0e, 0x0d, 0x02, 0x01, 0x01, 0x02, 0x05, 0x01, 0x03, 0x01, 0x08, 0x00,
+                0x00, 0x03, 0x0b, 0x0b, 0x0c, 0x11, 0x03, 0x01, 0x02, 0x01, 0x06, 0x01, 0x03, 0x01,
+                0x05, 0x04, 0x02, 0x02, 0x0a, 0x0c, 0x0d, 0x0f, 0x04, 0x03, 0x02, 0x00, 0x03, 0x02,
+                0x04, 0x01, 0x09, 0x02, 0x00, 0x03, 0x0b, 0x0c, 0x0d, 0x0f, 0x02, 0x01, 0x01, 0x03,
+                0x02, 0x01, 0x07, 0x00, 0x07, 0x04, 0x02, 0x02, 0x09, 0x0a, 0x0b, 0x10, 0x01, 0x02,
+                0x03, 0x02, 0x03, 0x00, 0x07, 0x02, 0x09, 0x01, 0x00, 0x00, 0x0b, 0x09, 0x0e, 0x0e,
+                0x01, 0x01, 0x04, 0x03, 0x06, 0x01, 0x07, 0x01, 0x07, 0x03, 0x04, 0x01, 0x09, 0x0a,
+                0x0f, 0x10, 0x03, 0x03, 0x01, 0x01, 0x02, 0x02, 0x06, 0x01, 0x08, 0x00, 0x01, 0x04,
+                0x07, 0x0a, 0x0e, 0x11, 0x02, 0x04, 0x02, 0x01, 0x02, 0x03, 0x03, 0x02, 0x07, 0x04,
+                0x03, 0x01, 0x07, 0x09, 0x0f, 0x0d, 0x03, 0x02, 0x01, 0x00, 0x06, 0x01, 0x04, 0x04,
+                0x06, 0x02, 0x01, 0x04, 0x08, 0x0d, 0x0e, 0x10, 0x03, 0x00, 0x02, 0x01, 0x03, 0x02,
+                0x03, 0x00, 0x08, 0x04, 0x01, 0x03, 0x08, 0x09, 0x0b, 0x11, 0x03, 0x03, 0x01, 0x04,
+                0x06, 0x04, 0x04, 0x02, 0x08, 0x04, 0x01, 0x04, 0x0a, 0x0d, 0x0e, 0x10, 0x02, 0x02,
+                0x01, 0x03, 0x06, 0x02, 0x03, 0x04, 0x08, 0x01, 0x02, 0x04, 0x08, 0x0b, 0x0e, 0x0e,
+                0x00, 0x01, 0x03, 0x01, 0x02, 0x04, 0x06, 0x00, 0x05, 0x00, 0x00, 0x00, 0x08, 0x09,
+                0x0e, 0x10, 0x02, 0x00, 0x03, 0x03, 0x06, 0x03, 0x07, 0x02, 0x09, 0x01, 0x01, 0x03,
+                0x07, 0x0a, 0x0f, 0x0f, 0x02, 0x04, 0x03, 0x04, 0x05, 0x03, 0x07, 0x00, 0x08, 0x01,
+                0x00, 0x00, 0x0a, 0x0d, 0x0b, 0x0f, 0x01, 0x04, 0x00, 0x00, 0x06, 0x04, 0x07, 0x01,
+                0x07, 0x00, 0x04, 0x04, 0x08, 0x09, 0x0c, 0x0d, 0x00, 0x01, 0x04, 0x00, 0x02, 0x00,
+                0x04, 0x00, 0x09, 0x01, 0x02, 0x02, 0x09, 0x0c, 0x0b, 0x0d, 0x04, 0x02, 0x02, 0x03,
+                0x06, 0x01, 0x07, 0x01, 0x06, 0x00, 0x01, 0x04, 0x08, 0x0d, 0x0f, 0x10, 0x03, 0x00,
+                0x03, 0x03, 0x03, 0x01, 0x03, 0x00, 0x05, 0x03, 0x02, 0x02, 0x0a, 0x0b, 0x0b, 0x0f,
+                0x00, 0x02, 0x02, 0x04, 0x03, 0x04, 0x05, 0x02, 0x09, 0x00, 0x04, 0x02, 0x09, 0x0c,
+                0x0b, 0x0d, 0x04, 0x01, 0x00, 0x02, 0x04, 0x00, 0x05, 0x02, 0x05, 0x01, 0x02, 0x03,
+                0x08, 0x0b, 0x0d, 0x10, 0x01, 0x00, 0x04, 0x02, 0x03, 0x01, 0x05, 0x02, 0x09, 0x01,
+                0x00, 0x01, 0x08, 0x0b, 0x0c, 0x0d, 0x03, 0x03, 0x02, 0x03, 0x05, 0x01, 0x05, 0x04,
+                0x05, 0x04, 0x04, 0x01, 0x0a, 0x0b, 0x0f, 0x0d, 0x04, 0x03, 0x02, 0x00, 0x03, 0x01,
+                0x05, 0x02, 0x07, 0x04, 0x03, 0x04, 0x09, 0x0a, 0x0c, 0x0f, 0x04, 0x01, 0x00, 0x00,
+                0x04, 0x03, 0x04, 0x04, 0x09, 0x00, 0x00, 0x03, 0x0b, 0x0a, 0x0b, 0x10, 0x01, 0x04,
+                0x00, 0x00, 0x03, 0x03, 0x05, 0x00, 0x09, 0x01, 0x01, 0x01, 0x0b, 0x0c, 0x0f, 0x11,
+                0x01, 0x04,
+            ],
+            compressed: &[
+                0xff, 0x04, 0x00, 0x02, 0x01, 0x05, 0x04, 0x08, 0x00, 0xff, 0x04, 0x02, 0x07, 0x0d,
+                0x0c, 0x11, 0x02, 0x00, 0xff, 0x03, 0x04, 0x04, 0x04, 0x03, 0x02, 0x09, 0x02, 0xff,
+                0x03, 0x01, 0x0b, 0x0a, 0x0d, 0x0e, 0x04, 0x03, 0xff, 0x03, 0x04, 0x02, 0x00, 0x07,
+                0x00, 0x08, 0x00, 0x3f, 0x03, 0x03, 0x0b, 0x0a, 0x0b, 0x10, 0xfd, 0xf1, 0x06, 0x04,
+                0x07, 0x03, 0x07, 0x04, 0xff, 0x01, 0x03, 0x0a, 0x0c, 0x0c, 0x0f, 0x02, 0x04, 0xe3,
+                0x01, 0x04, 0xc6, 0x02, 0x09, 0xff, 0x04, 0x02, 0x03, 0x09, 0x0b, 0x0f, 0x0d, 0x02,
+                0xc7, 0x03, 0x04, 0x01, 0xfc, 0x02, 0xff, 0x05, 0x02, 0x00, 0x00, 0x0a, 0x0b, 0x0d,
+                0x0f, 0xff, 0x03, 0x00, 0x01, 0x02, 0x02, 0x02, 0x07, 0x04, 0xf1, 0x09, 0xa7, 0x08,
+                0x0a, 0x0c, 0xff, 0x11, 0x04, 0x00, 0x00, 0x04, 0x03, 0x04, 0x06, 0xff, 0x01, 0x06,
+                0x01, 0x03, 0x01, 0x07, 0x09, 0x0e, 0x8f, 0x10, 0x02, 0x01, 0x03, 0x92, 0xff, 0x04,
+                0x00, 0x06, 0x01, 0x00, 0x03, 0x09, 0x0a, 0xc7, 0x0d, 0x10, 0x02, 0x8f, 0x05, 0x18,
+                0xc0, 0x09, 0x3f, 0xda, 0x08, 0x0b, 0x0b, 0x0d, 0x00, 0x7e, 0xbf, 0x04, 0x01, 0x06,
+                0x04, 0x09, 0x1c, 0x6b, 0x07, 0x0a, 0xf1, 0x90, 0xa2, 0x02, 0x03, 0x05, 0xe3, 0x01,
+                0x09, 0xa8, 0x0b, 0x0c, 0x47, 0x0e, 0x0d, 0x03, 0xdf, 0xfc, 0xc0, 0x02, 0x06, 0x00,
+                0x00, 0x01, 0x18, 0x70, 0x0e, 0xff, 0x49, 0x02, 0x06, 0x03, 0x03, 0x00, 0x05, 0x03,
+                0xff, 0x03, 0x02, 0x08, 0x0c, 0x0f, 0x0e, 0x03, 0x02, 0xe3, 0x02, 0x01, 0xf0, 0x02,
+                0x06, 0xff, 0x02, 0x04, 0x04, 0x07, 0x0b, 0x0b, 0x0f, 0x00, 0x63, 0x01, 0x01, 0xb2,
+                0x05, 0xfc, 0x4e, 0x04, 0x04, 0x09, 0x0c, 0x0d, 0x31, 0x0d, 0x72, 0x02, 0x8e, 0x20,
+                0x01, 0x07, 0x68, 0x1f, 0x09, 0x0c, 0x0f, 0x10, 0x04, 0x71, 0xdf, 0xd0, 0x04, 0x07,
+                0x5c, 0x80, 0x09, 0x09, 0x81, 0xf7, 0x7a, 0x60, 0x03, 0x03, 0x03, 0x08, 0xfc, 0xa7,
+                0x07, 0x0b, 0x0c, 0x0f, 0x04, 0x88, 0xdf, 0x35, 0xe3, 0x02, 0x09, 0xc7, 0x09, 0x09,
+                0x31, 0x0f, 0x90, 0x00, 0xdd, 0x80, 0x01, 0x05, 0x01, 0xd1, 0xf7, 0x0b, 0x23, 0x0f,
+                0x11, 0x75, 0xfe, 0x01, 0x07, 0x00, 0x09, 0x03, 0x00, 0x04, 0x3f, 0x08, 0x09, 0x0b,
+                0x0d, 0x03, 0x01, 0x1e, 0xd0, 0x01, 0x05, 0x00, 0xff, 0xb0, 0x02, 0x08, 0x0d, 0x0f,
+                0x10, 0x01, 0x03, 0xbd, 0x00, 0x21, 0xf7, 0x03, 0x02, 0x07, 0x81, 0xf5, 0x47, 0x09,
+                0x0d, 0x0b, 0x30, 0x24, 0x64, 0x90, 0x4f, 0x02, 0xf5, 0x0b, 0x0f, 0x0f, 0xd0, 0xe8,
+                0xe0, 0x01, 0xf5, 0x03, 0x02, 0x1b, 0x0a, 0x0d, 0x81, 0xf5, 0x00, 0xd1, 0xa4, 0x50,
+                0x02, 0xf7, 0x07, 0xfa, 0x02, 0xf4, 0xf9, 0xf6, 0x06, 0x00, 0x04, 0x04, 0x7d, 0x06,
+                0x49, 0xf7, 0x08, 0x09, 0x0c, 0x10, 0x11, 0x19, 0xf2, 0xf2, 0xf1, 0xa0, 0x7a, 0x08,
+                0x0d, 0x0e, 0x63, 0x0e, 0x01, 0x60, 0x03, 0xfc, 0xbe, 0x08, 0x03, 0x01, 0x04, 0x07,
+                0x88, 0x90, 0xe1, 0x11, 0x01, 0x35, 0xdd, 0xde, 0x81, 0xf1, 0x0c, 0x0b, 0x81, 0xf3,
+                0x00, 0x38, 0xb2, 0x05, 0x02, 0xe2, 0xf0, 0x40, 0x0e, 0x11, 0xe2, 0xa9, 0xf6, 0xe6,
+                0x04, 0x01, 0x7f, 0x08, 0x01, 0x00, 0x02, 0x07, 0x09, 0x0d, 0x6c, 0xb0, 0x04, 0x82,
+                0xef, 0x02, 0x74, 0x40, 0x81, 0xf5, 0x0d, 0x0e, 0xc4, 0x32, 0xed, 0x05, 0x39, 0x01,
+                0x40, 0x09, 0xfa, 0x80, 0x81, 0xf4, 0x05, 0x03, 0x05, 0x04, 0x4f, 0x06, 0x03, 0x02,
+                0x01, 0x60, 0x92, 0x9a, 0xf0, 0x30, 0x01, 0xf4, 0xaf, 0x02, 0x0a, 0x0b, 0x0b, 0x01,
+                0xf6, 0x01, 0xf2, 0x23, 0x02, 0x07, 0xbe, 0xfa, 0xac, 0x01, 0xf3, 0x02, 0x01, 0x01,
+                0x02, 0x31, 0x05, 0x6e, 0x08, 0xbe, 0x99, 0x0b, 0x0b, 0x0c, 0x11, 0x09, 0xf3, 0x16,
+                0x23, 0xf0, 0x05, 0xc1, 0xf6, 0xa3, 0xa0, 0x0f, 0xa9, 0x03, 0xf6, 0x46, 0x02, 0xef,
+                0x0b, 0xf0, 0xc4, 0xd0, 0xa6, 0x07, 0x1e, 0x81, 0xf6, 0x02, 0x02, 0x09, 0xed, 0x10,
+                0x8b, 0xf0, 0x00, 0x01, 0xed, 0x01, 0x00, 0x47, 0x00, 0x0b, 0x09, 0x20, 0x5c, 0x32,
+                0x06, 0x01, 0x81, 0xf2, 0x2f, 0xc1, 0xec, 0x09, 0x0a, 0x0f, 0x81, 0xeb, 0x1a, 0x9f,
+                0x11, 0xf7, 0x08, 0x2f, 0x19, 0x07, 0x0a, 0x0e, 0x02, 0xf4, 0xda, 0xcd, 0x01, 0xf5,
+                0x04, 0x02, 0xed, 0x0f, 0x51, 0x0d, 0xb3, 0x21, 0xed, 0x3b, 0x81, 0xf6, 0x02, 0x81,
+                0xf6, 0x0d, 0x0e, 0x7a, 0x40, 0x72, 0xf4, 0x03, 0x00, 0x08, 0xd1, 0x01, 0xea, 0x30,
+                0x01, 0xf8, 0x01, 0x8b, 0x04, 0x06, 0xf1, 0xe9, 0xf0, 0xed, 0x04, 0x89, 0xe8, 0x10,
+                0x89, 0xee, 0x03, 0x06, 0x78, 0x2c, 0x08, 0x01, 0x02, 0xb7, 0x01, 0xec, 0x0e, 0x0e,
+                0x92, 0xf5, 0x02, 0x91, 0xf4, 0x5f, 0x05, 0x00, 0x00, 0x00, 0x08, 0x82, 0xea, 0x9c,
+                0x20, 0x06, 0x03, 0x5a, 0x70, 0x01, 0x81, 0xf3, 0x0f, 0x01, 0xe8, 0x8b, 0x01, 0xf8,
+                0x03, 0x01, 0xe7, 0x60, 0xb5, 0x0a, 0x81, 0xf1, 0x01, 0xf4, 0x00, 0x01, 0xe7, 0xd8,
+                0x3e, 0x04, 0x02, 0xf3, 0x0d, 0xd8, 0x69, 0x00, 0xe1, 0xf1, 0x00, 0xf1, 0x09, 0x5a,
+                0x09, 0x0c, 0x0b, 0x25, 0x0d, 0x0a, 0xef, 0x40, 0x15, 0x03, 0xf2, 0x01, 0xf3, 0x81,
+                0xf5, 0xd5, 0x7d, 0x62, 0xf5, 0x81, 0xf7, 0x02, 0xeb, 0x02, 0xac, 0xae, 0x02, 0xed,
+                0x84, 0xfe, 0x2e, 0x41, 0xf3, 0x04, 0x00, 0x81, 0xf2, 0xbe, 0x2a, 0x08, 0x0b, 0x0d,
+                0x10, 0x91, 0xf0, 0xa2, 0xb1, 0xeb, 0xe0, 0x41, 0xf1, 0x45, 0x08, 0x79, 0xf6, 0x15,
+                0x7d, 0x91, 0xe7, 0xf1, 0xee, 0x04, 0x04, 0x01, 0x0a, 0x45, 0x01, 0xe4, 0x83, 0xf5,
+                0xe0, 0x45, 0x03, 0xea, 0x81, 0xe6, 0xc0, 0x57, 0x7a, 0xe4, 0x04, 0x09, 0x02, 0xf4,
+                0x82, 0xf5, 0x14, 0x60, 0xf1, 0xf2, 0xfb, 0x70, 0x01, 0x81, 0xef, 0x0f, 0x11, 0x01,
+                0x04, 0x02, 0x00, 0x00,
+            ],
+        },
+    ];
+
+    #[test]
+    pub fn compresses_things() {
+        for (index, test) in TEST_DATA.iter().enumerate() {
+            println!("\ntest #{}", index);
+            println!("  prs_compress({:02x?})", test.uncompressed);
+            assert_eq!(*test.compressed, *prs_compress(&test.uncompressed));
+            println!("  prs_decompress({:02x?})", test.compressed);
+            assert_eq!(*test.uncompressed, *prs_decompress(&test.compressed));
+        }
+    }
+
+    #[test]
+    pub fn testit() {}
+}
diff --git a/psoutils/src/encryption.rs b/psoutils/src/encryption.rs
new file mode 100644
index 0000000..450d700
--- /dev/null
+++ b/psoutils/src/encryption.rs
@@ -0,0 +1,636 @@
+use byte_slice_cast::AsMutSliceOf;
+use thiserror::Error;
+
+const PC_STREAM_LENGTH: usize = 57;
+const GC_STREAM_LENGTH: usize = 521;
+
+#[derive(Error, Debug, PartialEq)]
+pub enum EncryptionError {
+    #[error("Error casting input data slice")]
+    InputDataCastingError(#[from] byte_slice_cast::Error),
+}
+
+pub trait Crypter {
+    fn crypt(&mut self, data: &mut [u8]) -> Result<(), EncryptionError>;
+}
+
+pub struct GCCrypter {
+    stream: [u32; GC_STREAM_LENGTH],
+    offset: usize,
+}
+
+impl GCCrypter {
+    pub fn new(seed: u32) -> GCCrypter {
+        let mut seed = seed;
+        let mut basekey = 0;
+        let mut stream = [0u32; GC_STREAM_LENGTH];
+        let mut offset = 0;
+
+        for _ in 0..=16 {
+            for _ in 0..32 {
+                seed = seed.wrapping_mul(0x5d588b65);
+                basekey >>= 1;
+                seed = seed.wrapping_add(1);
+                if seed & 0x80000000 != 0 {
+                    basekey |= 0x80000000;
+                } else {
+                    basekey &= 0x7fffffff;
+                }
+            }
+            stream[offset] = basekey;
+            offset += 1;
+        }
+
+        stream[offset - 1] = ((stream[0] >> 9) ^ (stream[offset - 1] << 23)) ^ stream[15];
+        let mut source1 = 0;
+        let mut source2 = 1;
+        let mut source3 = offset - 1;
+        while offset != GC_STREAM_LENGTH {
+            stream[offset] = stream[source3]
+                ^ (((stream[source1] << 23) & 0xff800000) ^ ((stream[source2] >> 9) & 0x007fffff));
+            offset += 1;
+            source1 += 1;
+            source2 += 1;
+            source3 += 1;
+        }
+
+        let mut crypter = GCCrypter { stream, offset };
+        crypter.update_stream();
+        crypter.update_stream();
+        crypter.update_stream();
+        crypter.offset = GC_STREAM_LENGTH - 1;
+
+        crypter
+    }
+
+    fn update_stream(&mut self) {
+        let mut r5: u32 = 0;
+        let mut r6: u32 = 489;
+        let mut r7: u32 = 0;
+
+        while r6 != GC_STREAM_LENGTH as u32 {
+            self.stream[r5 as usize] ^= self.stream[r6 as usize];
+            r5 += 1;
+            r6 += 1;
+        }
+
+        while r5 != GC_STREAM_LENGTH as u32 {
+            self.stream[r5 as usize] ^= self.stream[r7 as usize];
+            r5 += 1;
+            r7 += 1;
+        }
+
+        self.offset = 0;
+    }
+
+    fn next(&mut self) -> u32 {
+        self.offset += 1;
+        if self.offset == GC_STREAM_LENGTH {
+            self.update_stream();
+        }
+        self.stream[self.offset]
+    }
+}
+
+impl Crypter for GCCrypter {
+    fn crypt(&mut self, data: &mut [u8]) -> Result<(), EncryptionError> {
+        let data = data.as_mut_slice_of::<u32>()?;
+
+        for dword in data.iter_mut() {
+            *dword ^= self.next().to_le();
+        }
+
+        Ok(())
+    }
+}
+
+pub struct PCCrypter {
+    stream: [u32; PC_STREAM_LENGTH],
+    offset: usize,
+}
+
+impl PCCrypter {
+    pub fn new(seed: u32) -> PCCrypter {
+        let mut esi: u32 = 1;
+        let mut ebx: u32 = seed;
+        let mut edi: u32 = 0x15;
+
+        let mut stream = [0u32; PC_STREAM_LENGTH];
+        stream[56] = ebx;
+        stream[55] = ebx;
+
+        while edi <= 0x46e {
+            let eax = edi;
+            let var1 = eax / 55;
+            let edx = eax.wrapping_sub(var1 * 55);
+            ebx = ebx.wrapping_sub(esi);
+            edi = edi.wrapping_add(0x15);
+            stream[edx as usize] = esi;
+            esi = ebx;
+            ebx = stream[edx as usize];
+        }
+
+        let mut crypter = PCCrypter {
+            stream,
+            offset: PC_STREAM_LENGTH - 1,
+        };
+
+        crypter.update_stream();
+        crypter.update_stream();
+        crypter.update_stream();
+        crypter.update_stream();
+
+        crypter
+    }
+
+    fn update_stream(&mut self) {
+        let mut edi: u32 = 1;
+        let mut edx: u32 = 0x18;
+        let mut eax = edi;
+        while edx > 0 {
+            let esi = self.stream[eax.wrapping_add(0x1f) as usize];
+            let ebp = self.stream[eax as usize].wrapping_sub(esi);
+            self.stream[eax as usize] = ebp;
+            eax = eax.wrapping_add(1);
+            edx = edx.wrapping_sub(1);
+        }
+
+        edi = 0x19;
+        edx = 0x1f;
+        eax = edi;
+        while edx > 0 {
+            let esi = self.stream[eax.wrapping_sub(0x18) as usize];
+            let ebp = self.stream[eax as usize].wrapping_sub(esi);
+            self.stream[eax as usize] = ebp;
+            eax = eax.wrapping_add(1);
+            edx = edx.wrapping_sub(1);
+        }
+    }
+
+    fn next(&mut self) -> u32 {
+        if self.offset == PC_STREAM_LENGTH - 1 {
+            self.update_stream();
+            self.offset = 1;
+        }
+        let next = self.stream[self.offset];
+        self.offset += 1;
+        next
+    }
+}
+
+impl Crypter for PCCrypter {
+    fn crypt(&mut self, data: &mut [u8]) -> Result<(), EncryptionError> {
+        let data = data.as_mut_slice_of::<u32>()?;
+
+        for dword in data.iter_mut() {
+            *dword ^= self.next().to_le();
+        }
+
+        Ok(())
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use claim::*;
+
+    use super::*;
+
+    #[test]
+    fn pc_encrypt_decrypt() {
+        let seed: u32 = 0x12345678;
+
+        let decrypted = [
+            0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x2c, 0x20, 0x77, 0x6f, 0x72, 0x6c, 0x64, 0x21, 0x00,
+            0x00, 0x00,
+        ];
+        let encrypted = [
+            0xde, 0xee, 0x84, 0xb6, 0xd6, 0x4c, 0x10, 0xbc, 0x07, 0x3c, 0x20, 0xca, 0x08, 0x20,
+            0xee, 0xf0,
+        ];
+
+        let mut buffer = decrypted.clone();
+
+        // encrypt data
+        let mut encrypter = PCCrypter::new(seed);
+        assert_ok!(encrypter.crypt(&mut buffer));
+        assert_eq!(buffer, encrypted);
+
+        // crypting the same buffer again with the same Crypter instance won't decrypt it
+        let mut temp_buffer = buffer.clone();
+        assert_ok!(encrypter.crypt(&mut temp_buffer));
+        assert_ne!(temp_buffer, decrypted);
+
+        // crypting the previous buffer with a new Crypter using the same seed, will decrypt it
+        let mut decrypter = PCCrypter::new(seed);
+        assert_ok!(decrypter.crypt(&mut buffer));
+        assert_eq!(buffer, decrypted);
+    }
+
+    #[test]
+    fn gc_encrypt_decrypt() {
+        let seed: u32 = 0x12345678;
+
+        let decrypted = [
+            0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x2c, 0x20, 0x77, 0x6f, 0x72, 0x6c, 0x64, 0x21, 0x00,
+            0x00, 0x00,
+        ];
+        let encrypted = [
+            0x8a, 0x87, 0x5e, 0x68, 0x24, 0x01, 0xee, 0xac, 0xd6, 0x82, 0x07, 0xff, 0x2b, 0xa5,
+            0x92, 0x2b,
+        ];
+
+        let mut buffer = decrypted.clone();
+
+        // encrypt data
+        let mut encrypter = GCCrypter::new(seed);
+        assert_ok!(encrypter.crypt(&mut buffer));
+        assert_eq!(buffer, encrypted);
+
+        // crypting the same buffer again with the same Crypter instance won't decrypt it
+        let mut temp_buffer = buffer.clone();
+        assert_ok!(encrypter.crypt(&mut temp_buffer));
+        assert_ne!(temp_buffer, decrypted);
+
+        // crypting the previous buffer with a new Crypter using the same seed, will decrypt it
+        let mut decrypter = GCCrypter::new(seed);
+        assert_ok!(decrypter.crypt(&mut buffer));
+        assert_eq!(buffer, decrypted);
+    }
+
+    #[test]
+    fn pc_crypt_non_dword_sized_data_returns_error() {
+        let mut crypter = PCCrypter::new(0x12345678);
+
+        // too small. 3 bytes, not dword-sized
+        let mut bad_data = [0x01, 0x02, 0x03];
+        assert_matches!(
+            crypter.crypt(&mut bad_data),
+            Err(EncryptionError::InputDataCastingError(_))
+        );
+
+        // too big. 5 bytes, also not dword-sized
+        let mut bad_data = [0x01, 0x02, 0x03, 0x04, 0x05];
+        assert_matches!(
+            crypter.crypt(&mut bad_data),
+            Err(EncryptionError::InputDataCastingError(_))
+        );
+
+        // good. dword-sized
+        let mut good_data = [0x01, 0x02, 0x03, 0x04];
+        assert_ok!(crypter.crypt(&mut good_data));
+    }
+
+    #[test]
+    fn gc_crypt_non_dword_sized_data_returns_error() {
+        let mut crypter = GCCrypter::new(0x12345678);
+
+        // too small. 3 bytes, not dword-sized
+        let mut bad_data = [0x01, 0x02, 0x03];
+        assert_matches!(
+            crypter.crypt(&mut bad_data),
+            Err(EncryptionError::InputDataCastingError(_))
+        );
+
+        // too big. 5 bytes, also not dword-sized
+        let mut bad_data = [0x01, 0x02, 0x03, 0x04, 0x05];
+        assert_matches!(
+            crypter.crypt(&mut bad_data),
+            Err(EncryptionError::InputDataCastingError(_))
+        );
+
+        // good. dword-sized
+        let mut good_data = [0x01, 0x02, 0x03, 0x04];
+        assert_ok!(crypter.crypt(&mut good_data));
+    }
+
+    #[test]
+    fn pc_encrypt_multiple_things_and_decrypt_multiple_things() {
+        let seed: u32 = 0x42424242;
+
+        let first_decrypted = [0x46, 0x69, 0x72, 0x73, 0x74, 0x21, 0x21, 0x00];
+        let second_decrypted = [
+            0x53, 0x65, 0x63, 0x6f, 0x6e, 0x64, 0x20, 0x62, 0x69, 0x74, 0x20, 0x6f, 0x66, 0x20,
+            0x64, 0x61, 0x74, 0x61, 0x00, 0x00,
+        ];
+
+        let first_encrypted = [0xf4, 0x41, 0x19, 0x58, 0xa3, 0x2d, 0xbc, 0x67];
+        let second_encrypted = [
+            0x9d, 0x08, 0xee, 0xec, 0x89, 0x7f, 0xac, 0x66, 0xef, 0x18, 0x9c, 0xc4, 0xa9, 0x84,
+            0x34, 0xa1, 0x90, 0x76, 0x71, 0xea,
+        ];
+
+        let mut encrypter = PCCrypter::new(seed);
+
+        let mut first_buffer = first_decrypted.clone();
+        assert_ok!(encrypter.crypt(&mut first_buffer));
+        assert_eq!(first_encrypted, first_buffer);
+
+        let mut second_buffer = second_decrypted.clone();
+        assert_ok!(encrypter.crypt(&mut second_buffer));
+        assert_eq!(second_encrypted, second_buffer);
+
+        let mut decrypter = PCCrypter::new(seed);
+
+        assert_ok!(decrypter.crypt(&mut first_buffer));
+        assert_eq!(first_decrypted, first_buffer);
+
+        assert_ok!(decrypter.crypt(&mut second_buffer));
+        assert_eq!(second_decrypted, second_buffer);
+    }
+
+    #[test]
+    fn gc_encrypt_multiple_things_and_decrypt_multiple_things() {
+        let seed: u32 = 0x42424242;
+
+        let first_decrypted = [0x46, 0x69, 0x72, 0x73, 0x74, 0x21, 0x21, 0x00];
+        let second_decrypted = [
+            0x53, 0x65, 0x63, 0x6f, 0x6e, 0x64, 0x20, 0x62, 0x69, 0x74, 0x20, 0x6f, 0x66, 0x20,
+            0x64, 0x61, 0x74, 0x61, 0x00, 0x00,
+        ];
+
+        let first_encrypted = [0xda, 0x5a, 0x14, 0xab, 0x2c, 0x0a, 0x50, 0x07];
+        let second_encrypted = [
+            0xc4, 0x17, 0x16, 0xa3, 0x48, 0xf1, 0x9c, 0x8d, 0x8e, 0x71, 0xdd, 0x46, 0xe2, 0x09,
+            0xce, 0x38, 0xf9, 0xd3, 0xdb, 0x7c,
+        ];
+
+        let mut encrypter = GCCrypter::new(seed);
+
+        let mut first_buffer = first_decrypted.clone();
+        assert_ok!(encrypter.crypt(&mut first_buffer));
+        assert_eq!(first_encrypted, first_buffer);
+
+        let mut second_buffer = second_decrypted.clone();
+        assert_ok!(encrypter.crypt(&mut second_buffer));
+        assert_eq!(second_encrypted, second_buffer);
+
+        let mut decrypter = GCCrypter::new(seed);
+
+        assert_ok!(decrypter.crypt(&mut first_buffer));
+        assert_eq!(first_decrypted, first_buffer);
+
+        assert_ok!(decrypter.crypt(&mut second_buffer));
+        assert_eq!(second_decrypted, second_buffer);
+    }
+
+    #[test]
+    fn pc_encrypt_and_decrypt_bigger_data() {
+        let seed: u32 = 0xabcdef;
+
+        // these blocks of data are specifically intended to be larger than the PC encryption
+        // algorithm's "stream length", so we can test the wrap-around logic works too
+
+        let decrypted = [
+            0x4c, 0x6f, 0x72, 0x65, 0x6d, 0x20, 0x69, 0x70, 0x73, 0x75, 0x6d, 0x20, 0x64, 0x6f,
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+            0x63, 0x6f, 0x6e, 0x73, 0x65, 0x63, 0x74, 0x65, 0x74, 0x75, 0x72, 0x20, 0x61, 0x64,
+            0x69, 0x70, 0x69, 0x73, 0x63, 0x69, 0x6e, 0x67, 0x20, 0x65, 0x6c, 0x69, 0x74, 0x2e,
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+            0x75, 0x6d, 0x20, 0x65, 0x75, 0x20, 0x6c, 0x69, 0x62, 0x65, 0x72, 0x6f, 0x20, 0x65,
+            0x67, 0x65, 0x74, 0x20, 0x61, 0x6e, 0x74, 0x65, 0x20, 0x76, 0x61, 0x72, 0x69, 0x75,
+            0x73, 0x20, 0x70, 0x6c, 0x61, 0x63, 0x65, 0x72, 0x61, 0x74, 0x20, 0x65, 0x67, 0x65,
+            0x74, 0x20, 0x75, 0x74, 0x20, 0x6e, 0x69, 0x62, 0x68, 0x2e, 0x00, 0x00,
+        ];
+
+        let encrypted = [
+            0x3c, 0x76, 0x78, 0x22, 0x53, 0x33, 0x9b, 0x87, 0x0a, 0x02, 0x45, 0xf6, 0xfa, 0xcd,
+            0x95, 0x84, 0xc6, 0xc9, 0x3e, 0x89, 0x23, 0x51, 0x08, 0x77, 0x30, 0xaf, 0x34, 0xd3,
+            0xb0, 0x44, 0xe1, 0x17, 0x29, 0x23, 0x51, 0x0d, 0x0e, 0x3d, 0xff, 0xe1, 0x0c, 0xd2,
+            0xe0, 0xa1, 0xce, 0xd3, 0x2c, 0x6d, 0xc1, 0x03, 0x86, 0x85, 0x0c, 0x10, 0xce, 0x02,
+            0x15, 0xb3, 0x0a, 0x3c, 0x6a, 0x43, 0x76, 0x49, 0xd7, 0x11, 0xe9, 0x4e, 0x5b, 0x8f,
+            0x43, 0x1b, 0x0f, 0xfa, 0x3a, 0xd2, 0x62, 0xc5, 0x51, 0x2b, 0x0f, 0xf8, 0x18, 0xbc,
+            0xa3, 0x4a, 0xc8, 0xe0, 0x7c, 0xb8, 0xc1, 0x06, 0x36, 0xa1, 0xa4, 0xbe, 0x75, 0x4f,
+            0xc0, 0xe2, 0xe6, 0xd4, 0x7d, 0x3c, 0x4e, 0x1d, 0x72, 0xc1, 0x38, 0xc2, 0xf0, 0x3e,
+            0x8d, 0x28, 0x11, 0xae, 0x4b, 0x2d, 0xf2, 0x89, 0x32, 0xd8, 0x2d, 0x89, 0xb6, 0x33,
+            0xe7, 0x2d, 0xa1, 0xd9, 0x46, 0x8e, 0xf0, 0x0d, 0x9f, 0xf3, 0xa1, 0xe0, 0x7a, 0xe9,
+            0x50, 0xce, 0x34, 0x0f, 0xff, 0xd2, 0x4d, 0x0b, 0x30, 0xc5, 0xb5, 0x8c, 0x58, 0x75,
+            0x84, 0x3b, 0x7e, 0xa5, 0x95, 0x99, 0xac, 0x7c, 0x22, 0x9b, 0xfe, 0x26, 0xd2, 0x3c,
+            0xf3, 0xa7, 0xbd, 0x5f, 0x02, 0xcb, 0xa5, 0xcc, 0xa7, 0xc9, 0x78, 0xc2, 0x39, 0x7e,
+            0xf2, 0x76, 0xf4, 0x38, 0x67, 0xbf, 0x8e, 0xad, 0x6f, 0x02, 0xdb, 0x4b, 0x6a, 0x5b,
+            0x59, 0xd9, 0xbb, 0x0b, 0xe9, 0xf0, 0xb3, 0x44, 0x52, 0x53, 0x0d, 0x20, 0xb6, 0x4b,
+            0x32, 0x0f, 0x7c, 0x5c, 0x67, 0x2f, 0xd9, 0x1a, 0x75, 0xde, 0xb1, 0xbf, 0x27, 0x88,
+            0x54, 0x7d, 0xc5, 0x79, 0x9f, 0x2a, 0x12, 0x4b, 0x78, 0x96, 0xcf, 0x04, 0x15, 0x22,
+            0x84, 0x53, 0xa4, 0xa6, 0x55, 0xc2, 0x9a, 0x4a, 0xed, 0x6c, 0x82, 0x75, 0xcc, 0x63,
+            0x2c, 0x44, 0x4f, 0x27, 0xd8, 0x45, 0x22, 0xb1, 0xbd, 0xde, 0x83, 0xe9, 0x7e, 0xea,
+            0xf3, 0xa9, 0x2c, 0x18, 0x8c, 0x5c, 0xfd, 0xb2, 0xdc, 0xec, 0x93, 0xbe, 0x87, 0x5c,
+            0xc4, 0x7f, 0x6d, 0x11, 0x89, 0xab, 0xd7, 0x7d, 0xef, 0xc4, 0x49, 0x69, 0x2f, 0xb2,
+            0xd8, 0x03, 0xf2, 0x13, 0x0c, 0x53, 0x63, 0x0c, 0x3f, 0xfe, 0x93, 0xdb, 0x17, 0x21,
+            0x90, 0xee, 0xf0, 0xac, 0x4b, 0x03, 0xb4, 0x76, 0xfb, 0x78, 0x04, 0xcf, 0x60, 0x25,
+            0xa1, 0x52, 0x55, 0x9d, 0xc5, 0x5b, 0x28, 0xd0, 0x8c, 0x84, 0xe9, 0x60, 0x54, 0x1d,
+            0xc3, 0x2f, 0x20, 0x3e, 0x37, 0xab, 0xac, 0x91, 0x4e, 0x44, 0x44, 0x7f, 0xa3, 0x1b,
+            0x9f, 0xe1, 0xa2, 0x90, 0xd9, 0xa9, 0x85, 0x63, 0x33, 0x63, 0x4a, 0xad, 0xb1, 0xcf,
+            0x37, 0x59, 0x77, 0x46, 0xb7, 0x99, 0x9d, 0x0d, 0x70, 0x1d, 0x76, 0x3c, 0x33, 0xa5,
+            0xc1, 0xfe, 0x6e, 0xe1, 0xac, 0xbc, 0x24, 0x79, 0x0d, 0x66, 0x34, 0x6a, 0x61, 0xa1,
+            0x9d, 0xde, 0x3f, 0x44, 0x9f, 0x08, 0xb1, 0x74, 0xf0, 0x11, 0x6f, 0xd1, 0xd2, 0x5d,
+            0x1d, 0x83, 0xf3, 0x15, 0x5a, 0x7a, 0x01, 0x84, 0xb7, 0xe2, 0x5a, 0x15, 0x6f, 0x5a,
+            0x6c, 0xfe, 0xb3, 0xcb, 0xfb, 0x19, 0x28, 0x35, 0x2b, 0x37, 0xb1, 0xaa, 0x01, 0x88,
+            0xb7, 0x9d, 0x46, 0x87, 0x4c, 0xab, 0x27, 0xee, 0x74, 0xeb, 0x82, 0x74, 0xba, 0xab,
+            0x70, 0x26, 0x13, 0x1b, 0x4f, 0xf1, 0xaf, 0x01, 0x2e, 0x06, 0x6d, 0xb9, 0x02, 0xee,
+            0xf9, 0x1d, 0x50, 0x37, 0xf7, 0xc2, 0x3c, 0xe0, 0xea, 0x83, 0xc7, 0xcd, 0xdc, 0xad,
+            0xee, 0xc1, 0x56, 0xde, 0x3e, 0x3f, 0xff, 0x59, 0xd7, 0xab, 0x1c, 0x89, 0x72, 0xb7,
+            0xfd, 0xa3, 0xb6, 0x15, 0x9b, 0x12, 0x6c, 0x5d, 0x92, 0x1d, 0x7e, 0xb0, 0xf5, 0x19,
+            0x7b, 0x57, 0x2d, 0x62, 0x79, 0xad, 0xfb, 0xb0, 0x66, 0x41, 0xc0, 0x19, 0x15, 0xe0,
+            0xee, 0xe2, 0x55, 0x8b, 0x94, 0x44, 0x0e, 0x96, 0x84, 0xfa, 0xed, 0xc5, 0xbf, 0x8c,
+            0x61, 0x0a, 0xec, 0x29, 0x14, 0xd0, 0x22, 0x7f, 0x32, 0x54, 0x82, 0xc2, 0x7f, 0xf2,
+            0x4d, 0x7f, 0x4d, 0x9a, 0x62, 0xed, 0x17, 0xc8, 0x3b, 0xf3, 0x49, 0xc0, 0x13, 0xa1,
+            0x3e, 0x66, 0x6e, 0x27, 0xcb, 0xc6, 0xec, 0x01, 0xe8, 0xdc, 0x54, 0x92, 0x42, 0x26,
+            0x56, 0xb7, 0xd6, 0xc9, 0xa7, 0xff, 0x10, 0x7f, 0x3e, 0xc0, 0x60, 0x19, 0xac, 0x2d,
+            0xda, 0xa2, 0xb9, 0x99, 0x77, 0x23, 0x47, 0xbd, 0x3e, 0x4d, 0x72, 0x56, 0x27, 0x0c,
+            0x14, 0xf8, 0x30, 0xf4, 0xbf, 0x61, 0x26, 0xd0, 0x04, 0xe3, 0x99, 0x77, 0xde, 0xb4,
+            0xe6, 0x00, 0xa1, 0x8b, 0x3a, 0x08, 0x00, 0x5e, 0x47, 0xbc, 0xf1, 0x71, 0xe4, 0x9b,
+            0x92, 0x90, 0x6e, 0x52, 0x23, 0x01, 0x6c, 0x4f, 0x48, 0xae, 0x57, 0x96, 0x0b, 0xef,
+            0xc3, 0xe9, 0x3b, 0xf4, 0x69, 0x1c, 0x1b, 0x46, 0x46, 0x6a, 0x29, 0x57, 0x76, 0xc3,
+            0x62, 0x17, 0x0a, 0xd7, 0xf3, 0x5e, 0x38, 0x1c, 0x2f, 0xb4, 0xca, 0x72, 0x2d, 0xca,
+            0x10, 0x72, 0x3c, 0xa1, 0xfe, 0x7d, 0xea, 0x46, 0x14, 0x45, 0x7e, 0x40, 0x34, 0xae,
+            0xef, 0xd7, 0x6e, 0x31, 0x08, 0x71, 0xf4, 0x00, 0xc0, 0xcc, 0xe6, 0x3e, 0xdd, 0x40,
+            0x6d, 0xa0, 0xdb, 0x17, 0x12, 0x4a, 0x7a, 0x08, 0xb9, 0xda, 0x82, 0x89, 0x21, 0x8d,
+            0x50, 0xaf, 0x42, 0xd2, 0x1b, 0x2d, 0x8c, 0xcf, 0x64, 0x05, 0xa8, 0x5e, 0xec, 0x35,
+            0xba, 0x80, 0x30, 0x27, 0xd7, 0x48, 0x1d, 0xcb, 0x6b, 0x9c, 0x2c, 0xf4,
+        ];
+
+        let mut buffer = decrypted.clone();
+
+        let mut encrypter = PCCrypter::new(seed);
+        assert_ok!(encrypter.crypt(&mut buffer));
+        assert_eq!(encrypted, buffer);
+
+        let mut decrypter = PCCrypter::new(seed);
+        assert_ok!(decrypter.crypt(&mut buffer));
+        assert_eq!(decrypted, buffer);
+    }
+
+    #[test]
+    fn gc_encrypt_and_decrypt_bigger_data() {
+        let seed: u32 = 0xabcdef;
+
+        // these blocks of data are specifically intended to be larger than the Gamecube encryption
+        // algorithm's "stream length", so we can test the wrap-around logic works too
+
+        let decrypted = [
+            0x4c, 0x6f, 0x72, 0x65, 0x6d, 0x20, 0x69, 0x70, 0x73, 0x75, 0x6d, 0x20, 0x64, 0x6f,
+            0x6c, 0x6f, 0x72, 0x20, 0x73, 0x69, 0x74, 0x20, 0x61, 0x6d, 0x65, 0x74, 0x2c, 0x20,
+            0x63, 0x6f, 0x6e, 0x73, 0x65, 0x63, 0x74, 0x65, 0x74, 0x75, 0x72, 0x20, 0x61, 0x64,
+            0x69, 0x70, 0x69, 0x73, 0x63, 0x69, 0x6e, 0x67, 0x20, 0x65, 0x6c, 0x69, 0x74, 0x2e,
+            0x20, 0x4e, 0x61, 0x6d, 0x20, 0x65, 0x67, 0x65, 0x73, 0x74, 0x61, 0x73, 0x20, 0x64,
+            0x69, 0x63, 0x74, 0x75, 0x6d, 0x20, 0x65, 0x72, 0x6f, 0x73, 0x20, 0x6e, 0x6f, 0x6e,
+            0x20, 0x6c, 0x75, 0x63, 0x74, 0x75, 0x73, 0x2e, 0x20, 0x50, 0x65, 0x6c, 0x6c, 0x65,
+            0x6e, 0x74, 0x65, 0x73, 0x71, 0x75, 0x65, 0x20, 0x6e, 0x75, 0x6e, 0x63, 0x20, 0x70,
+            0x75, 0x72, 0x75, 0x73, 0x2c, 0x20, 0x73, 0x75, 0x73, 0x63, 0x69, 0x70, 0x69, 0x74,
+            0x20, 0x76, 0x65, 0x6c, 0x20, 0x65, 0x78, 0x20, 0x69, 0x6e, 0x2c, 0x20, 0x73, 0x6f,
+            0x6c, 0x6c, 0x69, 0x63, 0x69, 0x74, 0x75, 0x64, 0x69, 0x6e, 0x20, 0x66, 0x69, 0x6e,
+            0x69, 0x62, 0x75, 0x73, 0x20, 0x64, 0x6f, 0x6c, 0x6f, 0x72, 0x2e, 0x20, 0x41, 0x6c,
+            0x69, 0x71, 0x75, 0x61, 0x6d, 0x20, 0x61, 0x6c, 0x69, 0x71, 0x75, 0x61, 0x6d, 0x20,
+            0x73, 0x65, 0x6d, 0x20, 0x6a, 0x75, 0x73, 0x74, 0x6f, 0x2c, 0x20, 0x76, 0x69, 0x74,
+            0x61, 0x65, 0x20, 0x70, 0x6f, 0x73, 0x75, 0x65, 0x72, 0x65, 0x20, 0x65, 0x72, 0x61,
+            0x74, 0x20, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x64, 0x75, 0x6d, 0x20, 0x6e, 0x65, 0x63,
+            0x2e, 0x20, 0x4e, 0x75, 0x6e, 0x63, 0x20, 0x73, 0x69, 0x74, 0x20, 0x61, 0x6d, 0x65,
+            0x74, 0x20, 0x65, 0x6c, 0x65, 0x69, 0x66, 0x65, 0x6e, 0x64, 0x20, 0x65, 0x6e, 0x69,
+            0x6d, 0x2e, 0x20, 0x4d, 0x6f, 0x72, 0x62, 0x69, 0x20, 0x71, 0x75, 0x69, 0x73, 0x20,
+            0x75, 0x6c, 0x6c, 0x61, 0x6d, 0x63, 0x6f, 0x72, 0x70, 0x65, 0x72, 0x20, 0x6d, 0x61,
+            0x75, 0x72, 0x69, 0x73, 0x2e, 0x20, 0x50, 0x72, 0x6f, 0x69, 0x6e, 0x20, 0x6c, 0x61,
+            0x63, 0x75, 0x73, 0x20, 0x74, 0x65, 0x6c, 0x6c, 0x75, 0x73, 0x2c, 0x20, 0x61, 0x75,
+            0x63, 0x74, 0x6f, 0x72, 0x20, 0x71, 0x75, 0x69, 0x73, 0x20, 0x6f, 0x64, 0x69, 0x6f,
+            0x20, 0x6e, 0x6f, 0x6e, 0x2c, 0x20, 0x6d, 0x6f, 0x6c, 0x6c, 0x69, 0x73, 0x20, 0x74,
+            0x65, 0x6d, 0x70, 0x6f, 0x72, 0x20, 0x6d, 0x61, 0x73, 0x73, 0x61, 0x2e, 0x20, 0x50,
+            0x68, 0x61, 0x73, 0x65, 0x6c, 0x6c, 0x75, 0x73, 0x20, 0x66, 0x65, 0x75, 0x67, 0x69,
+            0x61, 0x74, 0x20, 0x69, 0x70, 0x73, 0x75, 0x6d, 0x20, 0x61, 0x74, 0x20, 0x69, 0x6d,
+            0x70, 0x65, 0x72, 0x64, 0x69, 0x65, 0x74, 0x20, 0x66, 0x61, 0x63, 0x69, 0x6c, 0x69,
+            0x73, 0x69, 0x73, 0x2e, 0x20, 0x50, 0x72, 0x61, 0x65, 0x73, 0x65, 0x6e, 0x74, 0x20,
+            0x70, 0x68, 0x61, 0x72, 0x65, 0x74, 0x72, 0x61, 0x20, 0x61, 0x75, 0x67, 0x75, 0x65,
+            0x20, 0x6e, 0x6f, 0x6e, 0x20, 0x6f, 0x64, 0x69, 0x6f, 0x20, 0x63, 0x6f, 0x6e, 0x67,
+            0x75, 0x65, 0x20, 0x74, 0x72, 0x69, 0x73, 0x74, 0x69, 0x71, 0x75, 0x65, 0x2e, 0x20,
+            0x50, 0x72, 0x6f, 0x69, 0x6e, 0x20, 0x73, 0x61, 0x67, 0x69, 0x74, 0x74, 0x69, 0x73,
+            0x20, 0x66, 0x65, 0x72, 0x6d, 0x65, 0x6e, 0x74, 0x75, 0x6d, 0x20, 0x6c, 0x61, 0x63,
+            0x75, 0x73, 0x2c, 0x20, 0x73, 0x69, 0x74, 0x20, 0x61, 0x6d, 0x65, 0x74, 0x20, 0x76,
+            0x69, 0x76, 0x65, 0x72, 0x72, 0x61, 0x20, 0x61, 0x72, 0x63, 0x75, 0x20, 0x63, 0x6f,
+            0x6e, 0x73, 0x65, 0x63, 0x74, 0x65, 0x74, 0x75, 0x72, 0x20, 0x61, 0x2e, 0x20, 0x43,
+            0x75, 0x72, 0x61, 0x62, 0x69, 0x74, 0x75, 0x72, 0x20, 0x74, 0x69, 0x6e, 0x63, 0x69,
+            0x64, 0x75, 0x6e, 0x74, 0x20, 0x6e, 0x6f, 0x6e, 0x20, 0x6c, 0x6f, 0x72, 0x65, 0x6d,
+            0x20, 0x76, 0x69, 0x74, 0x61, 0x65, 0x20, 0x6c, 0x61, 0x6f, 0x72, 0x65, 0x65, 0x74,
+            0x2e, 0x20, 0x49, 0x6e, 0x20, 0x64, 0x69, 0x63, 0x74, 0x75, 0x6d, 0x20, 0x74, 0x65,
+            0x6d, 0x70, 0x75, 0x73, 0x20, 0x74, 0x69, 0x6e, 0x63, 0x69, 0x64, 0x75, 0x6e, 0x74,
+            0x2e, 0x20, 0x46, 0x75, 0x73, 0x63, 0x65, 0x20, 0x71, 0x75, 0x69, 0x73, 0x20, 0x6d,
+            0x69, 0x20, 0x73, 0x65, 0x64, 0x20, 0x65, 0x72, 0x6f, 0x73, 0x20, 0x63, 0x6f, 0x6d,
+            0x6d, 0x6f, 0x64, 0x6f, 0x20, 0x76, 0x65, 0x6e, 0x65, 0x6e, 0x61, 0x74, 0x69, 0x73,
+            0x2e, 0x20, 0x51, 0x75, 0x69, 0x73, 0x71, 0x75, 0x65, 0x20, 0x65, 0x67, 0x65, 0x73,
+            0x74, 0x61, 0x73, 0x20, 0x64, 0x6f, 0x6c, 0x6f, 0x72, 0x20, 0x65, 0x74, 0x20, 0x6e,
+            0x75, 0x6e, 0x63, 0x20, 0x64, 0x69, 0x63, 0x74, 0x75, 0x6d, 0x20, 0x62, 0x6c, 0x61,
+            0x6e, 0x64, 0x69, 0x74, 0x2e, 0x20, 0x56, 0x65, 0x73, 0x74, 0x69, 0x62, 0x75, 0x6c,
+            0x75, 0x6d, 0x20, 0x65, 0x75, 0x20, 0x6c, 0x69, 0x62, 0x65, 0x72, 0x6f, 0x20, 0x65,
+            0x67, 0x65, 0x74, 0x20, 0x61, 0x6e, 0x74, 0x65, 0x20, 0x76, 0x61, 0x72, 0x69, 0x75,
+            0x73, 0x20, 0x70, 0x6c, 0x61, 0x63, 0x65, 0x72, 0x61, 0x74, 0x20, 0x65, 0x67, 0x65,
+            0x74, 0x20, 0x75, 0x74, 0x20, 0x6e, 0x69, 0x62, 0x68, 0x2e, 0x00, 0x00,
+        ];
+
+        let encrypted = [
+            0x3f, 0x41, 0xde, 0x72, 0x6a, 0x7b, 0x71, 0x63, 0x59, 0x9e, 0x0f, 0x81, 0x31, 0x16,
+            0x6d, 0xe7, 0x73, 0x5f, 0x1a, 0xe1, 0xa1, 0xec, 0x78, 0x1d, 0xde, 0x0a, 0xf7, 0xcf,
+            0x1d, 0xbd, 0x21, 0xe9, 0xcd, 0xd3, 0xb6, 0xc1, 0xf0, 0xb7, 0x65, 0x43, 0xd4, 0xcb,
+            0xa0, 0xf5, 0x38, 0x0f, 0x19, 0xcc, 0x09, 0x4f, 0x60, 0x29, 0x37, 0x05, 0x6d, 0x9e,
+            0x05, 0xd8, 0xdc, 0x8b, 0x51, 0x20, 0x94, 0x5b, 0x15, 0xe7, 0x99, 0x14, 0x6b, 0x7b,
+            0x18, 0x3d, 0x4a, 0xdb, 0xcc, 0xfd, 0xe7, 0xdc, 0x8a, 0x3b, 0x1d, 0xf4, 0x4e, 0x8c,
+            0xfb, 0xfa, 0xec, 0x01, 0x10, 0x0e, 0x1d, 0x26, 0xad, 0x0c, 0xc6, 0x39, 0xb9, 0x58,
+            0x9f, 0x1e, 0x51, 0xc5, 0xb1, 0x4b, 0x86, 0x72, 0xec, 0x09, 0xb3, 0x8c, 0x70, 0xd6,
+            0xbc, 0xbd, 0x83, 0xfd, 0x53, 0xe3, 0x5d, 0xc8, 0xc7, 0xfe, 0xb4, 0xe0, 0x7f, 0x90,
+            0x62, 0xf4, 0x3a, 0x74, 0xd1, 0x5f, 0xa8, 0x00, 0xb7, 0xe7, 0x2b, 0xd0, 0x43, 0x43,
+            0xbc, 0xee, 0x7d, 0x50, 0x74, 0xe6, 0x10, 0x16, 0xbf, 0xb0, 0xf4, 0x0a, 0x82, 0x87,
+            0x39, 0x63, 0x30, 0x4b, 0x5a, 0xd7, 0xb4, 0x2c, 0xa0, 0x87, 0xae, 0x00, 0x11, 0x73,
+            0xc0, 0x10, 0x1b, 0x64, 0xb3, 0x69, 0xdc, 0x18, 0xd0, 0x43, 0x0f, 0xfb, 0xb5, 0x85,
+            0xd7, 0x1b, 0x7b, 0xeb, 0x06, 0xb4, 0x17, 0x9e, 0x42, 0x37, 0xc8, 0xe4, 0x59, 0x64,
+            0x99, 0x18, 0xd4, 0x4f, 0xef, 0x16, 0x97, 0x32, 0xb3, 0x8a, 0x5b, 0x31, 0x7a, 0xbc,
+            0x36, 0x1c, 0x0e, 0xd9, 0x80, 0x57, 0x61, 0x7b, 0x81, 0x34, 0x2f, 0xcc, 0x48, 0xcf,
+            0x81, 0x65, 0x99, 0xfb, 0xd1, 0x8e, 0x78, 0x90, 0xe6, 0x2e, 0x7a, 0xc2, 0x46, 0x61,
+            0x94, 0x57, 0x57, 0x55, 0xc8, 0xf1, 0x06, 0x0e, 0x7c, 0xa0, 0x25, 0xb8, 0x1c, 0x41,
+            0x9d, 0x65, 0x5f, 0xee, 0xd6, 0x21, 0x15, 0xf8, 0xa7, 0xd8, 0x1d, 0x8c, 0xc6, 0x78,
+            0x36, 0x75, 0x2e, 0x04, 0x04, 0xba, 0x43, 0x36, 0x87, 0x5c, 0x05, 0x1e, 0x83, 0xdc,
+            0x0d, 0xb6, 0x2b, 0x7d, 0x87, 0xf2, 0xc4, 0xf5, 0x64, 0xd0, 0x3d, 0xa0, 0x11, 0x74,
+            0xc1, 0x22, 0x23, 0x98, 0x07, 0xed, 0x3e, 0x24, 0xbd, 0xbc, 0xe2, 0x3e, 0x65, 0xaf,
+            0x98, 0x63, 0x09, 0x31, 0xb5, 0x5f, 0x07, 0x9a, 0x43, 0xb1, 0xcc, 0x15, 0xf0, 0x45,
+            0xcb, 0xe7, 0xa2, 0xf0, 0x35, 0x75, 0x0c, 0x50, 0xf9, 0xfa, 0xba, 0xf8, 0x59, 0xb8,
+            0x14, 0x1d, 0x15, 0x02, 0x1c, 0xa7, 0x56, 0x1a, 0x7f, 0xd5, 0xdd, 0x6e, 0x45, 0x3c,
+            0x97, 0x1d, 0xca, 0x20, 0x53, 0x44, 0xc6, 0xe7, 0xb4, 0xcb, 0x0a, 0xd8, 0x37, 0x7a,
+            0x2a, 0x3d, 0x17, 0x52, 0x34, 0x38, 0x2f, 0x7f, 0x6f, 0x99, 0x0f, 0x55, 0x31, 0x2c,
+            0xf2, 0xed, 0xe2, 0xf4, 0x53, 0xa7, 0x71, 0x45, 0x18, 0x3b, 0xa9, 0x80, 0xb8, 0x7f,
+            0x26, 0xca, 0x6c, 0x5e, 0xb0, 0xcf, 0x8b, 0xa1, 0x4d, 0x5e, 0x2a, 0x47, 0x9f, 0x90,
+            0x82, 0x79, 0xd9, 0x9c, 0xb7, 0xd2, 0x7c, 0xf0, 0xcc, 0xc1, 0xd9, 0xe9, 0x0d, 0xf7,
+            0xc6, 0x2a, 0xc1, 0x20, 0x90, 0x83, 0x43, 0x7e, 0x7b, 0x57, 0xd9, 0xcf, 0x5f, 0x3d,
+            0x46, 0x60, 0xed, 0x93, 0x7b, 0xce, 0x9e, 0xd2, 0xa4, 0xf1, 0xd0, 0xde, 0x82, 0x0c,
+            0xc7, 0xf6, 0xee, 0x0d, 0x8d, 0xce, 0x79, 0x87, 0x55, 0x88, 0x46, 0x77, 0x94, 0xee,
+            0xf2, 0xcf, 0x0e, 0x48, 0xab, 0x04, 0x5d, 0xb7, 0xbb, 0x98, 0x64, 0xc6, 0x7c, 0xe3,
+            0x79, 0xaf, 0x61, 0xfc, 0x38, 0x89, 0x70, 0x7b, 0x08, 0xda, 0x46, 0x79, 0xbf, 0x52,
+            0x41, 0x08, 0xc1, 0x0b, 0x0a, 0x47, 0x29, 0x81, 0x08, 0xcf, 0x8f, 0x44, 0xca, 0xdb,
+            0x47, 0x71, 0x0c, 0x31, 0x00, 0x31, 0x8b, 0x51, 0xc4, 0x34, 0x2c, 0xd8, 0xe1, 0x52,
+            0xcb, 0xcf, 0xd0, 0xea, 0x56, 0xb8, 0x8a, 0x13, 0x4b, 0x21, 0x8b, 0xec, 0xb8, 0xc2,
+            0xe7, 0x10, 0x4f, 0xea, 0x76, 0x05, 0x8e, 0x69, 0x98, 0x21, 0xe0, 0x57, 0xad, 0xa2,
+            0x82, 0x55, 0x7a, 0x2a, 0x45, 0x63, 0x21, 0x26, 0xfa, 0xdd, 0x4f, 0x13, 0x6d, 0x89,
+            0x63, 0x6b, 0x17, 0x41, 0xdf, 0x7b, 0xed, 0x48, 0x0a, 0x5e, 0xc0, 0x76, 0xa0, 0x31,
+            0x52, 0x32, 0x2b, 0x01, 0x64, 0x0c, 0x3f, 0xc3, 0x79, 0x4a, 0xf6, 0xc7, 0x92, 0xb7,
+            0x0c, 0x27, 0x10, 0xee, 0x90, 0x89, 0xe6, 0x44, 0x20, 0x8f, 0xa5, 0x66, 0xc4, 0x67,
+            0x26, 0xf4, 0x31, 0xa8, 0x39, 0x5f, 0x40, 0x6e, 0x23, 0xd0, 0x2a, 0x6d, 0x20, 0x2a,
+            0xc2, 0x2c, 0xf2, 0x21, 0xb4, 0xb1, 0x0d, 0x20, 0xd4, 0x06, 0x9e, 0x24, 0xd7, 0xd9,
+            0x44, 0xd6, 0x7a, 0x89, 0xa8, 0x7a, 0xf0, 0x96, 0x85, 0x96, 0xdd, 0xa6, 0xb9, 0xaf,
+            0x9a, 0x2d, 0xbe, 0xd3, 0xd3, 0xdd, 0xc0, 0x37, 0xc6, 0x39, 0x84, 0x65, 0x61, 0x36,
+            0xa6, 0xee, 0x5f, 0x9e, 0x3d, 0x98, 0xda, 0xed, 0xc6, 0xb4, 0x7f, 0x55, 0xe0, 0xca,
+            0x3f, 0xf5, 0xb4, 0x7e, 0xf8, 0x16, 0x28, 0x7d, 0x84, 0x09, 0x30, 0x7f, 0xe1, 0x25,
+            0x8b, 0xa7, 0x00, 0x53, 0xa3, 0x20, 0x19, 0x6a, 0x4f, 0x3d, 0xf9, 0x8c, 0x09, 0x62,
+            0x9d, 0xf6, 0x86, 0x32, 0xfb, 0x93, 0x68, 0xb7, 0x1c, 0x6d, 0x04, 0x7c, 0x0c, 0x38,
+            0x3a, 0x59, 0x99, 0xd1, 0xa0, 0x41, 0x20, 0xa6, 0xe0, 0x8c, 0xba, 0x1d, 0x1e, 0xbd,
+            0x22, 0x81, 0x60, 0xb2, 0x6d, 0x09, 0xa9, 0x78, 0xed, 0x27, 0x45, 0xb5,
+        ];
+
+        let mut buffer = decrypted.clone();
+
+        let mut encrypter = GCCrypter::new(seed);
+        assert_ok!(encrypter.crypt(&mut buffer));
+        assert_eq!(encrypted, buffer);
+
+        let mut decrypter = GCCrypter::new(seed);
+        assert_ok!(decrypter.crypt(&mut buffer));
+        assert_eq!(decrypted, buffer);
+    }
+}
diff --git a/psoutils/src/lib.rs b/psoutils/src/lib.rs
new file mode 100644
index 0000000..ea1a455
--- /dev/null
+++ b/psoutils/src/lib.rs
@@ -0,0 +1,2 @@
+pub mod compression;
+pub mod encryption;