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412 bytes added ,  22:04, 15 April 2015
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Line 53: Line 53:  
| 0x10
 
| 0x10
 
| 0x4
 
| 0x4
| Last 3-bytes here are used with the following HMAC. The first byte is normally 0xA5. The remaining bytes are initially(before the Amiibo is written to) all-zero. Byte[2] here is increased each time the Amiibo is written to.
+
| Last 3-bytes here are used with the following HMAC where the size is 0x1DF-bytes. The u16 starting at byte1 is used for the first two bytes in the 0x40-byte input buffer for Amiibo [[Process_Services_PXI|crypto]] init. The first byte is normally 0xA5. The remaining bytes are initially(before the Amiibo is written to) all-zero. Byte[2](maybe big-endian u16 starting at byte1?) here is increased each time the Amiibo is written to.
 
|-
 
|-
 
| 0x5
 
| 0x5
Line 65: Line 65:  
| 0x34
 
| 0x34
 
| 0x20
 
| 0x20
| SHA256-HMAC. The first 0x18-bytes of this hash is section3 in the encrypted buffer.
+
| SHA256-HMAC hash. The first 0x18-bytes of this hash is section3 in the encrypted buffer.
 
|-
 
|-
 
| 0x15
 
| 0x15
Line 71: Line 71:  
| 0x54
 
| 0x54
 
| 0x2C
 
| 0x2C
| Unknown, this is plaintext data.
+
| This is plaintext data, see below.
 
|-
 
|-
 
| 0x20
 
| 0x20
Line 77: Line 77:  
| 0x80
 
| 0x80
 
| 0x20
 
| 0x20
| SHA256-HMAC over 0x1DF-bytes: first 3-bytes are from the last 3-bytes of page[4], the rest is over the first 0x1DC-bytes of the plaintext data.
+
| SHA256-HMAC hash over 0x1DF-bytes: first 3-bytes are from the last 3-bytes of page[4], the rest is over the first 0x1DC-bytes of the plaintext data.
 
|-
 
|-
 
| 0x28
 
| 0x28
Line 90: Line 90:  
| 0x54
 
| 0x54
 
| This is section2 in the encrypted buffer.
 
| This is section2 in the encrypted buffer.
 +
|}
 +
 +
==== Structure of the data starting at page 0x15 ====
 +
{| class="wikitable" border="1"
 +
|-
 +
!  Offset
 +
!  Size
 +
!  Description
 +
|-
 +
| 0x0
 +
| 0xC
 +
| ?
 +
|-
 +
| 0xC
 +
| 0x20
 +
| Probably a SHA256-HMAC hash.
 
|}
 
|}
  

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