RSA Registers: Difference between revisions

Line 29:

| 0x100

|-

| ~~REG_RSAMSG~~

| REG_RSATXT

| 0x1000B800

| 0x100

Line 79:

The RSA public key for the selected keyslot can be written here. When writing the RSA key, the key is copied to 0x1000B500-RSA_bytesize, length RSA_bytesize. The engine determines the RSA byte-size by checking where the first word of the key was written. The engine only supports RSA-2048 and below.

== ~~REG_RSAMSG~~ ==

== REG_RSATXT ==

The RSA signature can be written here, and the data read from here is the message~~. The message padding must be checked by software~~. When writing the RSA signature, the signature is ~~copied to 0x1000B900-RSA_bytesize~~, ~~length RSA_bytesize. The engine determines~~ the ~~RSA byte-size by checking where~~ the ~~first word~~ of the ~~signature was written~~.

The RSA signature can be written here, and the data read from here is the message. When writing the RSA signature, the signature must be prepended with zeroes until it is a multiple of 8 bytes, and the end of the signature must align with the end of the register area.

The PKCS message padding must be manually checked by software, as hardware will only do raw RSA operations.

== Keyslots usage ==

@@ Line 29: / Line 29: @@
 | 0x100
 |-
-| REG_RSAMSG
+| REG_RSATXT
 | 0x1000B800
 | 0x100
@@ Line 79: / Line 79: @@
 The RSA public key for the selected keyslot can be written here. When writing the RSA key, the key is copied to 0x1000B500-RSA_bytesize, length RSA_bytesize. The engine determines the RSA byte-size by checking where the first word of the key was written. The engine only supports RSA-2048 and below.
-== REG_RSAMSG ==
+== REG_RSATXT ==
-The RSA signature can be written here, and the data read from here is the message. The message padding must be checked by software. When writing the RSA signature, the signature is copied to 0x1000B900-RSA_bytesize, length RSA_bytesize. The engine determines the RSA byte-size by checking where the first word of the signature was written.
+The RSA signature can be written here, and the data read from here is the message. When writing the RSA signature, the signature must be prepended with zeroes until it is a multiple of 8 bytes, and the end of the signature must align with the end of the register area.
+The PKCS message padding must be manually checked by software, as hardware will only do raw RSA operations.
 == Keyslots usage ==