rawhttps/src/tls/crypto/random.asm at master · felipeek/rawhttps · GitHub

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; ----------------------------------------------------------------------------------------

; nasm -felf64 hello.asm

; ----------------------------------------------------------------------------------------

%ifdef __APPLE__

global _random_64bit_integer

global _random_integer

global _clock_counter

global _random_s64

global _is_pow2

_random_64bit_integer: jmp random_64bit_integer

_random_integer: jmp random_integer

_clock_counter: jmp clock_counter

_random_s64: jmp random_s64

_is_pow2: jmp is_pow2

%else

global random_64bit_integer

global random_integer

global clock_counter

global random_s64

global is_pow2

%endif

section .text

random_64bit_integer:

%ifdef __APPLE__

; rdseed is not available on M2, not even when running amd64 code.

; For now we will simply return 0, this obviously need to be implemented

mov rax, 0

%else

rdseed rax

%endif

ret

random_s64:

random_integer:

%ifdef __APPLE__

; rdseed is not available on M2, not even when running amd64 code.

; For now we will simply consider 0, this obviously need to be implemented

mov rax, 0

%else

rdseed rax ; R

%endif

;rdrand rax

xor rdx, rdx

sub rsi, rdi ; max = max - min

div rsi ; R % max

mov rax, rdx ; modulo

add rax, rdi ; min + (R % max)

ret

clock_counter:

xor rax, rax

rdtsc

shl rdx, 32

or rax, rdx

ret

is_pow2:

blsr rax, rdi

ret

rawhttps/src/tls/crypto/random.asm at master · felipeek/rawhttps · GitHub

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