Difference between revisions of "SHA Registers"
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|- | |- | ||
| style="background: green" | Yes | | style="background: green" | Yes | ||
| − | | [[# | + | | [[#SHA_BLKCNT|SHA_BLKCNT]] |
| 0x1000A004 | | 0x1000A004 | ||
| 4 | | 4 | ||
| Line 26: | Line 26: | ||
|- | |- | ||
| style="background: green" | Yes | | style="background: green" | Yes | ||
| − | | [[# | + | | [[#SHA_FIFO|SHA_FIFO]] |
| 0x1000A080 | | 0x1000A080 | ||
| 0x40 | | 0x40 | ||
| Line 37: | Line 37: | ||
! Description | ! Description | ||
|- | |- | ||
| − | | 0-1 | + | | 0 |
| − | | | + | | Start (1=enable/busy, 0=idle) |
| + | |- | ||
| + | | 1 | ||
| + | | Final round (1=enable/busy, 0=normal) | ||
|- | |- | ||
| 2 | | 2 | ||
| − | | | + | | Input DMA enable (1= enable, 0=disable) |
|- | |- | ||
| 3 | | 3 | ||
| − | | Output Endianess (0= | + | | Output Endianess (0=little, 1=big) |
|- | |- | ||
| 4-5 | | 4-5 | ||
| Line 56: | Line 59: | ||
|- | |- | ||
| 8 | | 8 | ||
| − | | | + | | Clear FIFO? When set, the *entire* ARM9 hangs/crashes when attempting to read SHA_INFIFO. |
|- | |- | ||
| 9 | | 9 | ||
| − | | | + | | Enable FIFO (1=fifo, 0=write-only) |
|- | |- | ||
| 10 | | 10 | ||
| − | | | + | | Output DMA enable (1= enable, 0=disable) |
|- | |- | ||
| 16 | | 16 | ||
| − | | | + | | ? |
|- | |- | ||
| 17 | | 17 | ||
| − | | | + | | ? |
|} | |} | ||
| − | == | + | Bit 8 is used when boot9 chains eMMC reads with AES and SHA to to load, decrypt and verify FIRM partitions. |
| − | This reg contains the total size of the data written to REG_SHA_IN. | + | |
| + | == SHA_BLKCNT == | ||
| + | This reg contains the total size of the data written to REG_SHA_IN, this field is updated when performing hash-function final-round. | ||
== SHA_HASH == | == SHA_HASH == | ||
This reg contains the SHA* hash after the final round, and the internal state during normal rounds. It is possible to write the internal state using this register. | This reg contains the SHA* hash after the final round, and the internal state during normal rounds. It is possible to write the internal state using this register. | ||
| − | == | + | == SHA_FIFO == |
| − | The data to be hashed must be written here. | + | The data to be hashed must be written here. It does not matter what offset is written to. |
Latest revision as of 20:44, 15 May 2019
Registers[edit]
| Old3DS | Name | Address | Width | Used by |
|---|---|---|---|---|
| Yes | SHA_CNT | 0x1000A000 | 4 | Boot9, Process9 |
| Yes | SHA_BLKCNT | 0x1000A004 | 4 | Process9 |
| Yes | SHA_HASH | 0x1000A040 | 0x20 | Process9 |
| Yes | SHA_FIFO | 0x1000A080 | 0x40 | Boot9, Process9 |
SHA_CNT[edit]
| Bits | Description |
|---|---|
| 0 | Start (1=enable/busy, 0=idle) |
| 1 | Final round (1=enable/busy, 0=normal) |
| 2 | Input DMA enable (1= enable, 0=disable) |
| 3 | Output Endianess (0=little, 1=big) |
| 4-5 | Mode (0=SHA256, 1=SHA224, 2=3=SHA1) |
| 6 | ? |
| 7 | ? |
| 8 | Clear FIFO? When set, the *entire* ARM9 hangs/crashes when attempting to read SHA_INFIFO. |
| 9 | Enable FIFO (1=fifo, 0=write-only) |
| 10 | Output DMA enable (1= enable, 0=disable) |
| 16 | ? |
| 17 | ? |
Bit 8 is used when boot9 chains eMMC reads with AES and SHA to to load, decrypt and verify FIRM partitions.
SHA_BLKCNT[edit]
This reg contains the total size of the data written to REG_SHA_IN, this field is updated when performing hash-function final-round.
SHA_HASH[edit]
This reg contains the SHA* hash after the final round, and the internal state during normal rounds. It is possible to write the internal state using this register.
SHA_FIFO[edit]
The data to be hashed must be written here. It does not matter what offset is written to.