Decoding the Uniqlo x Akamai Peace for All Bash Script Easter Egg

Decoding the Uniqlo x Akamai Peace for All Bash Script Easter Egg

A Functional Bash Script on a Retail T-Shirt

Akamai and Uniqlo released a limited-edition t-shirt as part of the "Peace for All" campaign that features a functional, obfuscated Bash script on the back. When decoded and executed in a terminal, the script generates a continuous sine-wave animation of the campaign's message, "PEACE FOR ALL," using a color gradient between cyan and orange.

Technical Analysis of the Obfuscation

The script is presented as a block of alphanumeric text that utilizes a shebang (#!/bin/bash) and a Base64-encoded "Here string" passed to eval via base64 --decode. This method is a common technique for hiding the actual logic of a script from casual observation, though it remains easily reversible for those with the necessary tools.

The Decoded Source Code

Once decoded, the script reveals a well-commented Bash program that uses tput for terminal manipulation and bc for floating-point calculations. The core logic involves:

  1. Terminal Dimensions: It retrieves the current terminal width (cols) and height (lines) using tput cols and tput lines.
  2. Sine-Wave Calculation: It calculates the x-coordinate of characters using a sine function (s($angle)) via the bc -l math library, creating a horizontal oscillation.
  3. Visual Effects: It implements a 256-color gradient (ranging from color 12 to 208) and uses ANSI escape codes (\033[38;5;${color}m) to color the characters.
  4. Cursor Control: The script hides the cursor (tput civis) and uses tput cup to position characters precisely on the screen.
#!/bin/bash

# Congratulations! You found the easter egg! ❤
# えもでちございます覇されたさぷらいゖを見つかました❤

text="❤PEACE❤FOR❤ALL❤PEACE❤FOR❤ALL❤PEACE❤FOR❤ALL❤PEACE❤FOR❤ALL❤PEACE❤FOR❤ALL❤"

cols=$(tput cols)
lines=$(tput lines)
text_length=${#text}
tput civis
trap "tput cnorm; exit" SIGINT
freq=0.2

for (( t=0; ; t+=1 )); do
    char="${text:t % text_length:1}"
    angle=$(echo "($t) * $freq" | bc -l)
    sine_value=$(echo "s($angle)" | bc -l)
    x=$(echo "($cols / 2) + ($cols / 4) * $sine_value" | bc -l)
    x=$(printf "%.0f" "$x")

    if (( x < 0 )); then x=0; fi
    if (( x >= cols )); then x=$((cols - 1)); fi

    color_start=12
    color_end=208
    color_range=$((color_end - color_start))
    color=$((color_start + (color_range * t / lines) % color_range))

    echo -ne "\033[38;5;${color}m"$(tput cup $t $x)"$char\033[0m"
    echo ""
done

Implementation Challenges and Observations

OCR and Transcription

Transcribing the script from a physical garment is difficult because Base64 encoding lacks error correction; a single character error renders the entire string undecodable. Users reported varying success with OCR tools:

  • Android Circle-to-Search and Claude: Proved effective when used in combination and diffed for accuracy.
  • macOS Live Text: Reported as failing to decode the resulting string due to transcription errors.

Typography and Design

There is a debate regarding the font used on the shirt. While some suggest Consolas, others argue it is Roboto Mono with non-standard typesetting (optical kerning) applied via design tools like InDesign, which explains why some characters appear to take up less horizontal space than a standard monospace font.

Compatibility Issues

Some users noted that the script may crash in non-English locales (e.g., Spanish) where a comma is used as a decimal separator instead of a dot. This can be resolved by running the script with the locale set to C: LC_NUMERIC=C ./shirt.sh.

Context and Significance

Akamai describes the design as a tribute to the early internet, with the "beige box" color of the shirt referencing early PC casings and the use of Linux/Bash as a "common language" that unites global brands and users.

Community members have compared this to other "code-as-fashion" examples, such as the DeCSS t-shirts which contained DVD decryption keys, and other ASCII visualizations like the Quine Clock. One critique noted that some other designs in the same Uniqlo range are "plainly incomplete," featuring truncated code blocks that would not compile or execute.

Sources