feat: working on tiny crypto lib (WIP)
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3cb67bf990
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@ -45,6 +45,7 @@ Timestamp: Updated yyyy/mm/dd
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Group: Kernel {
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File: head.s (kernel/head.s)
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File: gdt.s (kernel/gdt.s)
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File: idt.s (kernel/idt.s)
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File: multiboot.inc (kernel/multiboot.inc)
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File: pic.s (kernel/pic.s)
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@ -55,17 +56,37 @@ Group: Kernel {
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File: serial.s (no auto-title, kernel/drivers/serial.s)
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} # Group: Driver
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File: msg_en (kernel/debug/msg_en.s)
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} # Group: Kernel
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Group: Lib {
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File: base.inc (lib/base.inc)
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Group: Base {
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File: log.s (lib/base/log.s)
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} # Group: Base
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Group: Crypto {
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Group: Hash {
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File: sha256.s (lib/crypto/hash/sha256.s)
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File: keccak.s (lib/crypto/hash/keccak.s)
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} # Group: Hash
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} # Group: Crypto
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File: ecdsa.s (lib/crypto/sign/ecdsa.s)
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} # Group: Lib
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File: crt0.s (bin/crt0.s)
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Group: Index {
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Index: Everything
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Constant Index: Constants
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File Index: Files
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Function Index: Functions
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Macro Index: Macros
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4
kernel/base/console.s
Normal file
4
kernel/base/console.s
Normal file
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@ -0,0 +1,4 @@
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struc console
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.init:
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endstruc
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29
kernel/debug/msg_en.s
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29
kernel/debug/msg_en.s
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@ -0,0 +1,29 @@
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; file: msg_en
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; English strings
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.section rodata
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msg_hello_world:
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db "StupidOS v", STUPID_VERSION, " (built with ", NASM_VERSION, " on ", BUILD_DATE, ")", 0
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msg_boot_info:
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db "Bootloader: %s", 0
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msg_pmm_initialized:
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db "PMM initialized", 0
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err_invalid_boot_magic:
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db "[ERROR] Invalid boot magic (got: %x, expected: 0x2BADB002)", 0
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err_cannot_map_memory:
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db "[ERROR] Can't map memory", 0
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warn_no_mmap:
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db "[WARN] mmap flag not set", 0
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msg_mmap_entry:
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db "Memory Map Entry:", 0xA
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db 0x9, "Address: (hi): %x (lo): %x", 0xA
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db 0x9, "Length: (hi): %x (lo): %x", 0xA
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db 0x9, "Type: %x", 0
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msg_mem_block:
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db "Free Memory:", 0xA
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db 0x9, "Address: %x", 0xA
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db 0x9, "Length: %x", 0
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msg_max_mem:
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db "Max memory: %x", 0
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msg_bitmap_stored_at:
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db "Bitmap stored at: %x", 0
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11
kernel/gdt.s
11
kernel/gdt.s
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@ -1,7 +1,18 @@
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; file: gdt.s
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;
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;
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[BITS 32]
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section .text
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; Function: setup_gdt
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;
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; in:
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; none
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;
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; out:
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; none
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;
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global setup_gdt
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setup_gdt:
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lgdt [gdt_ptr]
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@ -1,3 +1,5 @@
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; file: pic.s
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;
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[BITS 32]
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PIC1_CMD equ 0x20
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3
lib/crypto/hash/keccak.s
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3
lib/crypto/hash/keccak.s
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@ -0,0 +1,3 @@
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; file: keccak.s
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; Keccak 256 cryptographic hash
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137
lib/crypto/hash/sha256.s
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137
lib/crypto/hash/sha256.s
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@ -0,0 +1,137 @@
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; file: sha256.s
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; SHA-256 cryptographic hash
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;
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; Implementation is based on <Wikipedia's pseudocode at https://en.wikipedia.org/wiki/SHA-2#Pseudocode>
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;
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; About: CPU compatibility
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; /!\ Only work on *486+* due to bswap for now.
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[BITS 32]
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section .rodata
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; Constant: K
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; SHA-256 round constants
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K:
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dd 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
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dd 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
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dd 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
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dd 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
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dd 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
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dd 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
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dd 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
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dd 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
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section .text
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; Function: sha256_compute_block
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sha256_compute_block:
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push ebp
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mov ebp, esp
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leave
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ret
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; Function: sha256_internal
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;
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; in:
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; - state
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; - Input buffer
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; - Input buffer size
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;
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; out:
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; none
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;
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sha256_internal:
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push ebp
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push edi
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mov ebp, esp
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sub esp, 64+8
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mov eax, dword [ebp+16]
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xor edx, edx
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; set padlen to (len << 3)
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shld edx, eax, 3 ; 64-bit left shit
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sal eax, 3
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mov dword [ebp-(64+8)], eax
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mov dword [ebp-(64+4)], edx
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.for_block:
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cmp dword [ebp+16], 64
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jb .done
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push dword [ebp+12] ; push in
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push dword [ebp+8] ; push state
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call sha256_compute_block
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add esp, 8
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sub dword [ebp+16], 64 ; len -= 64
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add dword [ebp+12], 64 ; in += 64
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jmp .for_block
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.done:
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; ensure padding buffer is full of zero
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lea edi, [ebp-64]
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mov ecx, 16
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xor eax, eax
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rep stosd
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pop edi
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leave
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ret
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; Function: sha256
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;
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; in:
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; - Output buffer
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; - Input buffer
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; - Input buffer size
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;
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; out:
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; none
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;
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global sha256
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sha256:
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push ebp
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mov ebp, esp
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sub esp, 8*4 ; uint32_t state[8]
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; setup initial state
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mov dword [ebp-8*4], 0x6a09e667
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mov dword [ebp-7*4], 0xbb67ae85
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mov dword [ebp-6*4], 0x3c6ef372
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mov dword [ebp-5*4], 0xa54ff53a
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mov dword [ebp-4*4], 0x510e527f
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mov dword [ebp-3*4], 0x9b05688c
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mov dword [ebp-2*4], 0x1f83d9ab
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mov dword [ebp-1*4], 0x5be0cd19
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;
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; copy state to uint8_t *out
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mov edx, dword [ebp+8]
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mov eax, dword [ebp-8*4]
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bswap eax
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mov dword [edx], eax ; out[0] = bswap(state[0])
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mov eax, dword [ebp-7*4]
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bswap eax
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mov dword [edx+4], eax ; out[1] = bswap(state[1])
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mov eax, dword [ebp-6*4]
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bswap eax
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mov dword [edx+8], eax ; out[2] = bswap(state[2])
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mov eax, dword [ebp-5*4]
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bswap eax
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mov dword [edx+12], eax ; out[3] = bswap(state[3])
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mov eax, dword [ebp-4*4]
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bswap eax
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mov dword [edx+16], eax ; out[4] = bswap(state[4])
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mov eax, dword [ebp-3*4]
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bswap eax
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mov dword [edx+20], eax ; out[5] = bswap(state[5])
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mov eax, dword [ebp-2*4]
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bswap eax
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mov dword [edx+24], eax ; out[6] = bswap(state[6])
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mov eax, dword [ebp-1*4]
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bswap eax
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mov dword [edx+28], eax ; out[7] = bswap(state[7])
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leave
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ret
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2
lib/crypto/sign/ecdsa.s
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2
lib/crypto/sign/ecdsa.s
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; file: ecdsa.s
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; Elliptic Curve Digital Signature Algorithm (ECDSA)
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