From bae0af96936fec8f0651efc3e74d475ed4ffa7f7 Mon Sep 17 00:00:00 2001
From: Stanislav N Mikhailov <stas@enso.pro>
Date: Wed, 4 Mar 2026 21:05:17 +0300
Subject: [PATCH] Fix SHA-256 DLL stability issues and return code

---
 .gitignore  |   6 +++++-
 sha-256.asm |  18 +++++++++++-------
 sha-256.dll | Bin 22528 -> 22528 bytes
 sha-256.exp | Bin 1088 -> 1123 bytes
 sha-256.lib | Bin 2198 -> 2198 bytes
 5 files changed, 16 insertions(+), 8 deletions(-)

diff --git a/.gitignore b/.gitignore
index 782b392..2afcf7e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,5 +6,9 @@ sha-256.obj
 sha-256.dll
 sha-256.lib
 sha-256.exp
+tmp_smoke_sha/*
+tmp_verify_sha/*
+*.h
+*.tmp
+*.c
 
-sha-256.dll
diff --git a/sha-256.asm b/sha-256.asm
index a1e710a..ffb43c5 100644
--- a/sha-256.asm
+++ b/sha-256.asm
@@ -140,9 +140,9 @@ Sha256 proc CF_Addr:QWORD,CF_FullSize:QWORD,CF_CurrSize:QWORD,CF_digests:QWORD,C
 		movdqu myXMMSAVE+128,XMM14
 		movdqu myXMMSAVE+144,XMM15
 		mov myRnSAVE,r12
-		mov myRnSAVE+4,r13
-		mov myRnSAVE+8,r14
-		mov myRnSAVE+12,r15
+		mov myRnSAVE+8,r13
+		mov myRnSAVE+16,r14
+		mov myRnSAVE+24,r15
 	;если хэш по предложенному адресу = 0, запускаем Sha256Init
 		mov rax,qword ptr [r9]
 		add r9,8
@@ -190,6 +190,8 @@ Sha256 proc CF_Addr:QWORD,CF_FullSize:QWORD,CF_CurrSize:QWORD,CF_digests:QWORD,C
 		mov lastblocksize,1	;сообщаю, что произойдёт переполнение и блока будет 2 (1024 бита)
 		endingofsegment1:	;━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
 		lea rcx,lastblock	;rcx - указатель									┃
+		test rdx,rdx
+		jz end_endingofsegment2
 		endingofsegment2:	;													┃
 		mov bl,[rax]		;	перебрасываю хвост в локальную область			┃
 		mov [rcx],bl		;	оптимизировать!!! наверняка - жуткий тормоз!!!	┃
@@ -197,6 +199,7 @@ Sha256 proc CF_Addr:QWORD,CF_FullSize:QWORD,CF_CurrSize:QWORD,CF_digests:QWORD,C
 		inc rcx				;													┃
 		dec rdx				;													┃
 		jnz endingofsegment2;━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
+		end_endingofsegment2:
 		mov BYTE ptr [rcx],128	;дописываю 1 и 7 бит
 		mov edx,endingOfSegment
 		inc rdx				;в rdx - длинна хвоста + 8 бит
@@ -314,9 +317,10 @@ Sha256 proc CF_Addr:QWORD,CF_FullSize:QWORD,CF_CurrSize:QWORD,CF_digests:QWORD,C
 		movdqu XMM14,myXMMSAVE+128
 		movdqu XMM15,myXMMSAVE+144
 		mov R12,myRnSAVE
-		mov R13,myRnSAVE+4
-		mov R14,myRnSAVE+8
-		mov R15,myRnSAVE+12
+		mov R13,myRnSAVE+8
+		mov R14,myRnSAVE+16
+		mov R15,myRnSAVE+24
+		xor eax,eax		; NULL (0) = success
 		ret
 Sha256 Endp
 ;Инициализация хэш функции, ввод исходных значений
@@ -6945,4 +6949,4 @@ CompCycle proc; Цикл сжатия. Вынес в отдельную проц
 			or r12,r11		;A=T1+T2
 		ret
 CompCycle Endp	
-end
\ No newline at end of file
+end
diff --git a/sha-256.dll b/sha-256.dll
index 44c7ea1018d8b2aa1098a502d220abb9503b84de..a4863bc0e7ef195fd312c72e414ba7c1284af555 100644
GIT binary patch
delta 884
zcmXw%T}YEr7{}k|w5{b@MmDvi<;-cCUz^fg>Q=hh@+;jEyeM=yLM2gS2xZVB5@ZQ&
zPZvp&A4mj|4NNe~G7Q`HzLa^<m4-o4gr8S|H|v~t?!fu~&htO#Ih;T5>j{7-01rwb
z=qsym4MpldtUNLKV{@m;>i;g*X1{sZ<gZRD!)01mCz*CxD$?HG+Qxdg-BEAlI9LB3
z?pN2d_L#TDrKKv!fgInO8z#^Rx50=%AQN_`_K|<!E0FsoaZo&^kYq!=EfR^;3{2OH
zm~BFfR0~DeAx(uKdZn#W+r1@sJZ?z)WzB@+{*2>IS%+*B=u(e=Wy5J=zc<?Noo%Am
z6wZa_8*Sb-+ue_gwn5b)e7g5){K{pHyYOl5EPZ0lpz=AU$o-H!H7Vbp2nu|o7D#y|
zzE$(&hE+ts!T`T<QzL+yDQPUnEe%iZpJRY|+|mkU$Bf%rp6H@zGl|tm8NScv;Tvve
z37{0!g72~g(su^eb3^2nkpb3GlN*K%rli?`bp;{v=rjX-#oB@}#4#lmMfg%5f?GJL
z50hy<E69dUM5YdV3?b4|AYv$=0hX}a5T=nzifN==EG?#yazq49G0;d|B`gwE(wK$a
zB{b4W1{$f`Oe1ArkC{e_qD?DSBk5?iut+@>ED}=-nk)kJp~AXAW>Rsql7~$ksT61;
zs^p3q$EtYp@E8N|I9eqD5!HyD)eEHeD1NEs;RQmi06+0F)f9YOClGrQ4%hKyAW_7e
ziXsnn4MA8%uqUWuznPML$YnZ%Ep%d*-2h|gv|p4bQ;+j-9-l@fImmHFd~H8}gqeBQ
zT~4<%y|?R{yVFH$*0_w|NGO|da@=8dqFp?pr%P^zdSX}9D`egx_2`wcb4AQs#RkU-
VCEJOO4ZPzxP9Hnw$REEX`41P@OcDS9

delta 897
zcmZ9KT}YEr7{||Z+NNga<`+uFY-_pHE$2*UZqwn0Ggs<Xkf7F3R(fNCU4~OZiXm-#
z?n+3y=%Nx<CSH`4DA@MCgn5-gMbL$PS<r`cW#_ze1RXf%_x}IqIfwJ-eS$Fv#vp8k
z)rhTWWad));>SFDG&NtWxuTyW-4M+zut$diHr!x(C}7{ARid}Q_X0md{u}KsLi#3l
zk*Pmwe`@PH(UfG;y~X4ta}+zSl2J(_TYmX4E7W5L)nX9NKozb-DI{irZb4MG8%(pA
zvNFhaZf|dUuFkn7EO^i<*MR{C<R!3#A$c$UkWVPODIpuvIHDL(d<FJdiQg1cCDO@I
z@?>bi!!C#~opy)5xW|`Q-IMu6IFlC0{?J88%gVDx_9)L})&ta}M?pP1m%gWf<}_ni
zEkFxiQ;Rg{;)2dQC2TffL@Q981n9!BR;1|Q9we|#Cj#)5S{kriC%_;^N=3MhJ$jM8
zvEo_1K=YDlt(Vl;G3=>`!z1jjNYI}aE~p`iKrNP-;`C+>2fRYHDFG_J(&N=QYL3%!
zGY34zpgBQ*nIz9>!kL;loX7V^6EKbUY7%ta$Ss;<L}eY%lwHR%Rd7M)%Oz}<p~}WG
zNnn|jHkL`xJ(lT?oo8YzwH(5`cAiP);F;b!SSBsLbFfTFv}(9gj2$2(;6#&Q5uW0@
zOQgTm_}V2<g9PZqMz=_B>_>-NplihvG9<_v_Ys1s6H9Oz>pdcUScF!OKtC5s&=lgu
zHUT<uuuY`l0xsxEK7$c09nT|`X%Iv3=H{o`FpK@zWj15y*u=x$TDXpWZ(9blcpH)`
zeCch5Wi<J6ZM+}zm~HIu^AGzER`HT6%q#ronYlO3Jl@4Sb=BO9;iylW#dlKU3Euaq
Q*=t_<j$kLPymd<U7nPee0ssI2

diff --git a/sha-256.exp b/sha-256.exp
index 58339b1b556f447435d1612b68d9fa5aaf208da9..a63972cbe054b5d7c6f3d874b6d32b4690fb79e1 100644
GIT binary patch
delta 210
zcmX@W@tA`%rHz^4KM-h5<aB22ndqy{B*46}N{EqBVRA2{wxtfkv`z*F-^}Eq{Nnty
z5(SMQO$8rMKW~Pa47P#{$>k{w&Q>v@#i>QbF~uc`#kw&?sRj8l!5)s2pD|i885vDh
zWRm4DG0`(NH8L=t?8X!y@P&baK?8^xfmnfANh@;pu?A@;x$iEABU8_cpSkj*cV^$V
gJ4#7XQ>7FQ8yFZqL)GK7=q{5H)3nabg3S7i0PmndF8}}l

delta 174
zcmaFNae#v}rHz^4KM=4_<aB1toan2~^p<I3l@KGN=;U5TZ9N%=8AS{XzM08I`NjEZ
zB?=lrnhHLie%=gy47P#{$>k{w&Q>u+sRj8l!5)sflRq+AG8tM<)?t$6FtX4yvNSd}
zo*c*&Z^6L8@CAq^fS3`81sHk0ZPmW_FZ4lAW?0jX&35?=44;AGvOtVt;3Q@vrWr+>
IO_=o=0qry~#{d8T

diff --git a/sha-256.lib b/sha-256.lib
index bc54a5dd73a96bfe56854feae0974b88d3921828..d66ca90d40473020dc490d8acd645fa89d38f31d 100644
GIT binary patch
delta 108
zcmbOxI8AUv8xu>GY`}xbT}<m(bQq>}PPSuJpPbBW!~|sKvr0|g$o!vk(KN$9I~f=l
sm?rl#Nl(7Qk_J<$4^dUlA|koq)8tpIa3ho_?`PwHNXl(~&bFQr0PBt=YXATM

delta 108
zcmbOxI8AUv8xzadYK7yIyO`Fo$S}+(nrz3aJ~^4$hzZEdXO)_~k@-KT@BP}lI~f=l
sm?rl#Nl(7Qk_J<$4^dUl@+EQUy~(dw;YKJ=-p|GXk(Ar~oNYZL05xkSmjD0&