Код решения:
LEN = 16
expected_bytes = [0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A, 0x00, 0x00, 0x00, 0x0D, 0x49, 0x48, 0x44, 0x52]
image_bytes = [128, 252, 182, 115, 177, 211, 142, 252, 189, 248, 130, 93, 154, 0, 68, 90, 131, 255, 204, 170, 239, 167, 18, 51, 233, 43, 0, 26, 210, 72, 95, 120, 227, 7, 195, 126, 207, 254, 115, 53, 141, 217, 0, 11, 118, 192, 110, 0, 0, 170, 248, 73, 103, 78, 10, 174, 208, 233, 156, 187, 185, 65, 228, 0, 137, 128, 228, 71, 159, 10, 111, 10, 29, 96, 71, 238, 141, 86, 91, 82, 0, 214, 37, 114, 7, 0, 238, 114, 133, 0, 140, 0, 38, 36, 144, 108, 164, 141, 63, 2, 69, 73, 15, 65, 68, 0, 249, 13, 0, 64, 111, 220, 48, 0, 55, 255, 13, 12, 68, 41, 66, 120, 188, 0, 73, 27, 173, 72, 189, 80, 0, 148, 0, 64, 26, 123, 0, 32, 44, 237, 0, 252, 36, 19, 52, 0, 78, 227, 98, 88, 1, 185, 1, 128, 182, 177, 155, 44, 132, 162, 68, 0, 1, 239, 175, 248, 68, 91, 84, 18, 223, 223, 111, 83, 26, 188, 241, 12, 0, 197, 57, 89, 116, 96, 223, 96, 161, 45, 133, 127, 125, 63, 80, 129, 69, 59, 241, 157, 0, 105, 57, 23, 30, 241, 62, 229, 128, 91, 39, 152, 125, 146, 216, 91, 5, 217, 16, 48, 159, 4, 198, 23, 108, 178, 199, 14, 6, 175, 51, 154, 227, 45, 56, 140, 221, 0, 230, 228, 99, 239, 132, 198, 133, 72, 243, 93, 3, 86, 94, 246, 156, 153, 123, 1, 204, 200, 233, 143, 127, 64, 164, 203, 36, 24, 2, 169, 121, 122, 159, 40, 4, 25, 64, 0, 241, 9, 94, 220, 254, 221, 122, 8, 22, 227, 140, 221, 248, 250, 141, 66, 78, 126, 190, 73, 248, 105, 5, 14, 26, 19, 119, 223, 103, 165, 69, 177, 68, 61, 195, 239, 115, 199, 126, 61, 41, 242, 175, 85, 211, 11, 5, 250, 93, 79, 194, 78, 245, 223, 255, 189, 0, 128, 9, 150, 178, 0, 112, 247, 210, 21, 36, 0, 2, 252, 144, 59, 101, 164, 185, 94, 232, 59, 150, 255, 187, 1, 198, 171, 182, 228, 147, 73, 149, 47, 92, 133, 147, 254, 173, 242, 39, 254, 223, 214, 196, 135, 248, 34, 146, 206, 63, 127, 127, 22, 191, 92, 88, 69, 23, 142, 167, 237, 248, 23, 215, 148, 166, 59, 243, 248, 173, 210, 169, 254, 209, 157, 174, 192, 32, 228, 41, 192, 245, 47, 207, 120, 139, 28, 224, 249, 29, 55, 221, 109, 226, 21, 129, 75, 41, 113, 192, 147, 45, 144, 55, 228, 126, 250, 127, 197, 184, 155, 251, 19, 220, 11, 241, 171, 229, 213, 79, 135, 93, 49, 94, 144, 38, 250, 121, 113, 58, 114, 77, 111, 157, 146, 242, 175, 236, 185, 60, 67, 173, 103, 233, 234, 60, 248, 27, 242, 115, 223, 207, 218, 203, 115, 47, 252, 241, 152, 24, 165, 115, 126, 48, 76, 104, 126, 42, 225, 226, 211, 57, 252, 239, 21, 195, 205, 107, 255, 219, 132, 148, 81, 171, 53, 79, 91, 27, 174, 235, 124, 213, 71, 221, 243, 212, 38, 224, 124, 54, 77, 248, 252, 88, 163, 44, 191, 109, 63, 189, 231, 251, 189, 242, 141, 246, 249, 15, 0, 2, 230, 7, 244, 161, 31, 42, 182, 219, 15, 221, 164, 252, 207, 53, 95, 99, 60, 190, 232, 78, 255, 197, 16, 169, 252, 100, 164, 19, 158, 32, 189, 126, 140, 145, 158, 116, 245, 68, 94, 149, 111, 252, 74, 135, 189, 83, 74, 71, 218, 99, 220, 208, 87, 24, 228, 11, 111, 245, 1, 0, 98, 131, 46, 22, 94, 71, 244, 22, 147, 21, 83, 155, 252, 243, 90, 24, 59, 73, 247, 223, 127, 242, 183, 251, 124, 28, 245, 222, 199, 248, 122, 204, 230, 79, 219, 147, 11, 225, 202, 239, 24, 132, 55, 89, 221, 143, 151, 137, 63, 150, 79, 211, 8, 16, 4, 60, 63, 99, 65, 0, 2]
key = []
for keyidea in range(LEN):
for shifter in range(10):
offset = ((shifter * LEN) % len(image_bytes)) + keyidea
if expected_bytes[keyidea] == image_bytes[offset]:
key.append(shifter)
break
print("Key: ", end="")
print(*key, sep="")
print("Key Length: {}".format(len(key)))
Видео выполнения: