Created
January 16, 2024 18:25
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Executable to validate ICAN addresses for Linux & Mac
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| #!/bin/bash | |
| read -p "Enter ICAN Address for validation: " ICAN_ADDRESS | |
| CLEANED_ICAN=$(echo $ICAN_ADDRESS | tr '[:lower:]' '[:upper:]') | |
| CLEANED_ICAN=${CLEANED_ICAN//[[:blank:]]/} | |
| if ! [[ $CLEANED_ICAN =~ ^(CB|CE|AB)[0-9]{2}[A-F0-9]{40}$ ]]; then | |
| echo "Invalid ICAN Address format!" | |
| exit 1 | |
| fi | |
| # Extract the country code, checksum, and main address part | |
| COUNTRY_CODE=${CLEANED_ICAN:0:2} | |
| CHECKSUM=${CLEANED_ICAN:2:2} | |
| ADDRESS_PART=${CLEANED_ICAN:4} | |
| # Reorder: put ADDRESS_PART first, then COUNTRY_CODE, then CHECKSUM | |
| REORDERED_ICAN="${ADDRESS_PART}${COUNTRY_CODE}${CHECKSUM}" | |
| # Convert each character to its numeric equivalent | |
| SUM="" | |
| for ((i=0; i<${#REORDERED_ICAN}; i++)); do | |
| CHAR=${REORDERED_ICAN:$i:1} | |
| # Convert hexadecimal to decimal | |
| if [[ $CHAR =~ [0-9] ]]; then | |
| SUM+=$CHAR | |
| else | |
| # Convert A-F to 10-15 | |
| DECIMAL_VALUE=$(( $(printf '%d' "'$CHAR") - 55 )) | |
| SUM+=$DECIMAL_VALUE | |
| fi | |
| done | |
| # Perform mod 97 check | |
| OPERAND=${SUM} | |
| if [[ $(echo "$OPERAND % 97" | bc) -eq 1 ]]; then | |
| echo "Valid ICAN Address." | |
| exit 0 | |
| else | |
| echo "Invalid ICAN Address!" | |
| exit 1 | |
| fi |
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