| /* Copyright lowRISC contributors. */ |
| /* Licensed under the Apache License, Version 2.0, see LICENSE for details. */ |
| /* SPDX-License-Identifier: Apache-2.0 */ |
| |
| |
| .section .text.start |
| |
| /** |
| * Standalone RSA 1024 decrypt |
| * |
| * Uses OTBN modexp bignum lib to decrypt the message from the .data segment |
| * in this file with the private key contained in .data segment of this file. |
| * |
| * Copies the decrypted message to wide registers for comparison (starting at |
| * w0). See comment at the end of the file for expected values. |
| */ |
| run_rsa_1024_dec: |
| jal x1, modload |
| jal x1, modexp |
| /* pointer to out buffer */ |
| lw x21, 28(x0) |
| |
| /* copy all limbs of result to wide reg file */ |
| li x8, 0 |
| loop x30, 2 |
| bn.lid x8, 0(x21++) |
| addi x8, x8, 1 |
| |
| ecall |
| |
| |
| .data |
| |
| /* |
| * The words below are used by the code above, but the linker can't tell |
| * because we reference them by absolute address. Make a global symbol |
| * (cfg_data), which will refer to the whole lot and ensure that gc-sections |
| * doesn't discard them. |
| */ |
| .globl cfg_data |
| cfg_data: |
| |
| /* reserved */ |
| .word 0x00000000 |
| |
| /* number of limbs (N) */ |
| .word 0x00000004 |
| |
| /* pointer to m0' (dptr_m0d) */ |
| .word 0x00000280 |
| |
| /* pointer to RR (dptr_rr) */ |
| .word 0x000002c0 |
| |
| /* load pointer to modulus (dptr_m) */ |
| .word 0x00000080 |
| |
| /* pointer to base bignum buffer (dptr_in) */ |
| .word 0x000004c0 |
| |
| /* pointer to exponent buffer (dptr_exp) */ |
| .word 0x000006c0 |
| |
| /* pointer to out buffer (dptr_out) */ |
| .word 0x000008c0 |
| |
| |
| /* Modulus */ |
| /* skip to 128 */ |
| .skip 96 |
| |
| .word 0xc28cf49f |
| .word 0xb6e64c3b |
| .word 0xa21417f1 |
| .word 0x34ab89fe |
| .word 0xe4d4c752 |
| .word 0xe9289a03 |
| .word 0xc8aa371c |
| .word 0xafb68c05 |
| |
| .word 0x893c882e |
| .word 0xa62c908d |
| .word 0xd23f4ebf |
| .word 0xea5bb198 |
| .word 0xdb6f076f |
| .word 0xcfcc4b48 |
| .word 0x75a24aa4 |
| .word 0x7bda03fc |
| |
| .word 0xcb5adf60 |
| .word 0xbc7c20bc |
| .word 0x8ea4f2fe |
| .word 0x3ba5d46d |
| .word 0x21536a4e |
| .word 0x7f292995 |
| .word 0xaafd0e56 |
| .word 0xc8033b94 |
| |
| .word 0x127ca9e8 |
| .word 0xa3998c2e |
| .word 0xecf3ecf6 |
| .word 0xc39b1e20 |
| .word 0xdc59f4e7 |
| .word 0x5affc57c |
| .word 0x0a4536b4 |
| .word 0x962be299 |
| |
| |
| /* encrypted message */ |
| /* skip to 1216 */ |
| .skip 960 |
| |
| .word 0xe0e14a9b |
| .word 0x7ae96741 |
| .word 0x4a430036 |
| .word 0xcda13a47 |
| .word 0x79524410 |
| .word 0x3810cd51 |
| .word 0x3b47425f |
| .word 0x686f3abe |
| |
| .word 0x91dff899 |
| .word 0xbfa8b284 |
| .word 0x0539e396 |
| .word 0xa66cf53c |
| .word 0xbcdc315a |
| .word 0x0d595811 |
| .word 0x0a522e08 |
| .word 0x5b9dce33 |
| |
| .word 0x6fde2d48 |
| .word 0x587a618e |
| .word 0x6b4c0c56 |
| .word 0x4affcc62 |
| .word 0x6a88ead2 |
| .word 0x991f39d0 |
| .word 0x39f88b9a |
| .word 0x3c0d6626 |
| |
| .word 0xa3fe6181 |
| .word 0x82f3f1f6 |
| .word 0x43f4ed0b |
| .word 0x938bfd7b |
| .word 0x60de8b63 |
| .word 0x8ade6cc0 |
| .word 0x91f560d7 |
| .word 0x35f506d1 |
| |
| |
| /* private exponent */ |
| /* skip to 1728 */ |
| .skip 384 |
| |
| .word 0x93a8cd95 |
| .word 0x24a2614b |
| .word 0xeeb788b3 |
| .word 0x6dfc48e4 |
| .word 0xca97cdc4 |
| .word 0x41146c79 |
| .word 0xf4ca744b |
| .word 0xc386c827 |
| |
| .word 0xd9ddaef3 |
| .word 0xae51440f |
| .word 0x9741739d |
| .word 0x9ebad71b |
| .word 0x9a7a2bfd |
| .word 0xfbd58848 |
| .word 0x13464f06 |
| .word 0x17f60ed9 |
| |
| .word 0x1d63a0b9 |
| .word 0x581ccd6c |
| .word 0x951579d6 |
| .word 0x35a9ec64 |
| .word 0xc3a08e32 |
| .word 0xdd2f62e8 |
| .word 0xc3739e4a |
| .word 0x01ca5c4e |
| |
| .word 0x3a107e7d |
| .word 0xf9dacc79 |
| .word 0x49ecbe20 |
| .word 0x5d21e910 |
| .word 0x9550ecb5 |
| .word 0x511778ce |
| .word 0x42209f7b |
| .word 0x41b468dc |
| |
| /* Expected decrypted Message in wide register file: |
| w0 = 0x656e637279707420616e642064656372797074207468697320666f72206d653f |
| w1 = 0x0000000000000000000048656c6c6f206269676e756d2c2063616e20796f7520 |
| w2 = 0x0000000000000000000000000000000000000000000000000000000000000000 |
| w3 = 0x0000000000000000000000000000000000000000000000000000000000000000 |
| */ |
