2 files changed, 80 insertions, 0 deletions
diff --git a/venv/lib/python3.11/site-packages/faker/providers/ssn/en_CA/__init__.py b/venv/lib/python3.11/site-packages/faker/providers/ssn/en_CA/__init__.py
new file mode 100644
index 0000000..6df8f8b
--- /dev/null
+++ b/venv/lib/python3.11/site-packages/faker/providers/ssn/en_CA/__init__.py
@@ -0,0 +1,80 @@
+from .. import Provider as SsnProvider
+
+
+def checksum(sin):
+    """
+    Determine validity of a Canadian Social Insurance Number.
+    Validation is performed using a modified Luhn Algorithm.  To check
+    the Every second digit of the SIN is doubled and the result is
+    summed.  If the result is a multiple of ten, the Social Insurance
+    Number is considered valid.
+
+    https://en.wikipedia.org/wiki/Social_Insurance_Number
+    """
+
+    # Remove spaces and create a list of digits.
+    checksumCollection = list(sin.replace(" ", ""))
+    checksumCollection = [int(i) for i in checksumCollection]
+
+    # Discard the last digit, we will be calculating it later.
+    checksumCollection[-1] = 0
+
+    # Iterate over the provided SIN and double every second digit.
+    # In the case that doubling that digit results in a two-digit
+    # number, then add the two digits together and keep that sum.
+
+    for i in range(1, len(checksumCollection), 2):
+        result = checksumCollection[i] * 2
+        if result < 10:
+            checksumCollection[i] = result
+        else:
+            checksumCollection[i] = result - 10 + 1
+
+    # The appropriate checksum digit is the value that, when summed
+    # with the first eight values, results in a value divisible by 10
+
+    check_digit = 10 - (sum(checksumCollection) % 10)
+    check_digit = 0 if check_digit == 10 else check_digit
+
+    return check_digit
+
+
+class Provider(SsnProvider):
+    # In order to create a valid SIN we need to provide a number that
+    # passes a simple modified Luhn Algorithm checksum.
+    #
+    # This function reverses the checksum steps to create a random
+    # valid nine-digit Canadian SIN (Social Insurance Number) in the
+    # format '### ### ###'.
+    def ssn(self) -> str:
+        # Create an array of 8 elements initialized randomly.
+        digits = self.generator.random.sample(range(9), 8)
+
+        # The final step of the validation requires that all of the
+        # digits sum to a multiple of 10. First, sum the first 8 and
+        # set the 9th to the value that results in a multiple of 10.
+        check_digit = 10 - (sum(digits) % 10)
+        check_digit = 0 if check_digit == 10 else check_digit
+
+        digits.append(check_digit)
+
+        # digits is now the digital root of the number we want
+        # multiplied by the magic number 121 212 121. The next step is
+        # to reverse the multiplication which occurred on every other
+        # element.
+        for i in range(1, len(digits), 2):
+            if digits[i] % 2 == 0:
+                digits[i] = digits[i] // 2
+            else:
+                digits[i] = (digits[i] + 9) // 2
+
+        # Build the resulting SIN string.
+        sin = ""
+        for i in range(0, len(digits)):
+            sin += str(digits[i])
+            # Add a space to make it conform to Canadian formatting.
+            if i in (2, 5):
+                sin += " "
+
+        # Finally return our random but valid SIN.
+        return sin
diff --git a/venv/lib/python3.11/site-packages/faker/providers/ssn/en_CA/__pycache__/__init__.cpython-311.pyc b/venv/lib/python3.11/site-packages/faker/providers/ssn/en_CA/__pycache__/__init__.cpython-311.pyc
new file mode 100644
index 0000000..08e6402
--- /dev/null
+++ b/venv/lib/python3.11/site-packages/faker/providers/ssn/en_CA/__pycache__/__init__.cpython-311.pyc