NULL
The NULL value is encoded into a TLV triplet that begins with a Tag value of 0x05, a Length of 0x00, and no Value byte as shown by the following illustration.
The fifth line of the following example, adapted from the PKCS #10 Encoded ASN.1 topic, shows an encoded NULL value. The first byte is 0x05, and the second byte is 0x00. There is no content byte.
30 81 9f ; SEQUENCE (9f Bytes)
| 30 0d ; SEQUENCE (d Bytes)
| | 06 09 ; OBJECT_ID (9 Bytes)
| | | 2a 86 48 86 f7 0d 01 01 01 ; 1.2.840.113549.1.1.1
| | 05 00 ; NULL (0 Bytes)
| 03 81 8d ; BIT_STRING (8d Bytes)
| 00
| 30 81 89 ; SEQUENCE (89 Bytes)
| 02 81 81 ; INTEGER (81 Bytes)
| | 00
| | 8f e2 41 2a 08 e8 51 a8 8c b3 e8 53 e7 d5 49 50
| | b3 27 8a 2b cb ea b5 42 73 ea 02 57 cc 65 33 ee
| | 88 20 61 a1 17 56 c1 24 18 e3 a8 08 d3 be d9 31
| | f3 37 0b 94 b8 cc 43 08 0b 70 24 f7 9c b1 8d 5d
| | d6 6d 82 d0 54 09 84 f8 9f 97 01 75 05 9c 89 d4
| | d5 c9 1e c9 13 d7 2a 6b 30 91 19 d6 d4 42 e0 c4
| | 9d 7c 92 71 e1 b2 2f 5c 8d ee f0 f1 17 1e d2 5f
| | 31 5b b1 9c bc 20 55 bf 3a 37 42 45 75 dc 90 65
| 02 03 ; INTEGER (3 Bytes)
| 01 00 01
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