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74 lines
2.7 KiB
Go
74 lines
2.7 KiB
Go
package pkcs7
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import (
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"fmt"
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"testing"
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"github.com/stretchr/testify/assert"
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)
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func TestPad(t *testing.T) {
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for _, test := range []struct {
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n int
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in string
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expected string
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}{
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{8, "", "\x08\x08\x08\x08\x08\x08\x08\x08"},
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{8, "1", "1\x07\x07\x07\x07\x07\x07\x07"},
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{8, "12", "12\x06\x06\x06\x06\x06\x06"},
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{8, "123", "123\x05\x05\x05\x05\x05"},
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{8, "1234", "1234\x04\x04\x04\x04"},
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{8, "12345", "12345\x03\x03\x03"},
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{8, "123456", "123456\x02\x02"},
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{8, "1234567", "1234567\x01"},
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{8, "abcdefgh", "abcdefgh\x08\x08\x08\x08\x08\x08\x08\x08"},
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{8, "abcdefgh1", "abcdefgh1\x07\x07\x07\x07\x07\x07\x07"},
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{8, "abcdefgh12", "abcdefgh12\x06\x06\x06\x06\x06\x06"},
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{8, "abcdefgh123", "abcdefgh123\x05\x05\x05\x05\x05"},
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{8, "abcdefgh1234", "abcdefgh1234\x04\x04\x04\x04"},
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{8, "abcdefgh12345", "abcdefgh12345\x03\x03\x03"},
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{8, "abcdefgh123456", "abcdefgh123456\x02\x02"},
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{8, "abcdefgh1234567", "abcdefgh1234567\x01"},
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{8, "abcdefgh12345678", "abcdefgh12345678\x08\x08\x08\x08\x08\x08\x08\x08"},
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{16, "", "\x10\x10\x10\x10\x10\x10\x10\x10\x10\x10\x10\x10\x10\x10\x10\x10"},
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{16, "a", "a\x0f\x0f\x0f\x0f\x0f\x0f\x0f\x0f\x0f\x0f\x0f\x0f\x0f\x0f\x0f"},
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} {
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actual := Pad(test.n, []byte(test.in))
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assert.Equal(t, test.expected, string(actual), fmt.Sprintf("Pad %d %q", test.n, test.in))
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recovered, err := Unpad(test.n, actual)
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assert.NoError(t, err)
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assert.Equal(t, []byte(test.in), recovered, fmt.Sprintf("Unpad %d %q", test.n, test.in))
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}
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assert.Panics(t, func() { Pad(1, []byte("")) }, "bad multiple")
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assert.Panics(t, func() { Pad(256, []byte("")) }, "bad multiple")
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}
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func TestUnpad(t *testing.T) {
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// We've tested the OK decoding in TestPad, now test the error cases
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for _, test := range []struct {
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n int
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in string
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err error
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}{
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{8, "", ErrorPaddingNotFound},
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{8, "1", ErrorPaddingNotAMultiple},
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{8, "12", ErrorPaddingNotAMultiple},
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{8, "123", ErrorPaddingNotAMultiple},
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{8, "1234", ErrorPaddingNotAMultiple},
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{8, "12345", ErrorPaddingNotAMultiple},
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{8, "123456", ErrorPaddingNotAMultiple},
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{8, "1234567", ErrorPaddingNotAMultiple},
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{8, "1234567\xFF", ErrorPaddingTooLong},
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{8, "1234567\x09", ErrorPaddingTooLong},
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{8, "1234567\x00", ErrorPaddingTooShort},
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{8, "123456\x01\x02", ErrorPaddingNotAllTheSame},
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{8, "\x07\x08\x08\x08\x08\x08\x08\x08", ErrorPaddingNotAllTheSame},
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} {
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result, actualErr := Unpad(test.n, []byte(test.in))
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assert.Equal(t, test.err, actualErr, fmt.Sprintf("Unpad %d %q", test.n, test.in))
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assert.Equal(t, result, []byte(nil))
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}
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assert.Panics(t, func() { _, _ = Unpad(1, []byte("")) }, "bad multiple")
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assert.Panics(t, func() { _, _ = Unpad(256, []byte("")) }, "bad multiple")
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}
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