Upload files to "ircc_v8930_vigenere/TLS-Library-RNG"

2026-01-24 22:43:33 +00:00
1 parent 68a03e3575
commit 1f3654933c
@@ -0,0 +1,118 @@
+
+; Get entropy for PRNG from the various sources...
+
+get_entropy:
+
+    pusha
+
+    mcall 18, 20, entropy ; SysFn18.20 : SF_SYSTEM (18) / SSF_GET_RAM_INFO (20)
+    mcall 18, 4           ; SysFn18.4  : SF_SYSTEM (18) / SSF_GET_IDLE_COUNT (4)
+    mov dword[entropy+36], eax
+    mcall 37, 0           ; SysFn37.0  : SF_MOUSE_GET (37) / SSF_SCREEN_POSITION (0)
+    mov dword[entropy+40], eax
+    mcall 26, 10          ; SysFn26.10 : SF_SYSTEM_GET (26) / SSF_TIME_COUNT_PRO (10)
+    mov dword[entropy+44], edx
+    mov dword[entropy+48], eax
+    mcall 68, 0           ; SysFn68.0  : SF_SYS_MISC (68) / SSF_GET_TASK_SWITCH_COUNT (0)
+    mov dword[entropy+52], eax
+
+    mov esi, entropy
+    mov ebx, ENTROPY_SIZE
+    call replace_00_with_ff
+
+    popa
+
+    ret
+
+; replace_00_with_ff:
+; replace 00 with ff in a memory area
+;
+; IN:    ESI - pointer to a memory area
+;        EBX - size of a memory area
+
+replace_00_with_ff:
+
+    push eax ecx
+
+    xor ecx, ecx
+
+    .cycle_replace_00_with_ff:
+
+        cmp byte[esi], 0
+        jne .not_00
+        mov byte[esi], 0xff
+
+    .not_00:
+
+        inc esi
+        inc ecx
+        cmp ecx, ebx
+        jb .cycle_replace_00_with_ff
+
+    pop ecx eax
+
+    ret
+
+; Prepare, then call a Pseudo Random function based on HMAC
+
+fill_random_buffer:
+
+    pusha
+
+    call get_entropy
+    xor ebx, ebx
+    xor edx, edx
+    xor eax, eax
+    xor esi, esi
+    stdcall prf, entropy, ENTROPY_SIZE+1, random_buffer
+
+    popa
+
+    ret
+
+; convert_random_buffer_to_ascii:
+; convert a part of random buffer to ASCII chars
+;
+; IN:       ECX = size of a part of random buffer which will be converted
+
+convert_random_buffer_to_ascii:
+
+    push esi edx ebx eax
+
+    cmp ecx, 1
+    jb .wrong_part_size
+    cmp ecx, RANDOM_BUFFER_SIZE
+    ja .wrong_part_size
+
+    xor eax, eax
+    xor ebx, ebx
+
+    mov esi, random_buffer
+    mov edx, 95
+
+  .cycle_conversion:
+
+    mov al, byte[esi]
+
+    cmp al, 95
+    jb .skip_division
+
+    div dl
+    mov al, ah
+
+  .skip_division:
+
+    add al, 32
+    mov byte[esi], al
+
+    inc ebx
+    inc esi
+
+    cmp ebx, ecx
+    jne .cycle_conversion
+
+  .wrong_part_size:
+
+    pop eax ebx edx esi
+
+    ret