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376
Task/SHA-256/ARM-Assembly/sha-256.arm
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376
Task/SHA-256/ARM-Assembly/sha-256.arm
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/* ARM assembly Raspberry PI */
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/* program sha256.s */
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/* REMARK 1 : this program use routines in a include file
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see task Include a file language arm assembly
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for the routine affichageMess conversion10
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see at end of this program the instruction include */
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/* for constantes see task include a file in arm assembly */
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/************************************/
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/* Constantes */
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/************************************/
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.include "../constantes.inc"
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.equ LGHASH, 32 // result length
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/*******************************************/
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/* Structures */
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/********************************************/
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/* example structure variables */
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.struct 0
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var_a: // a
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.struct var_a + 4
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var_b: // b
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.struct var_b + 4
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var_c: // c
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.struct var_c + 4
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var_d: // d
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.struct var_d + 4
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var_e: // e
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.struct var_e + 4
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var_f: // f
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.struct var_f + 4
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var_g: // g
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.struct var_g + 4
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var_h: // h
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.struct var_h + 4
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/*********************************/
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/* Initialized data */
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/*********************************/
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.data
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szMessRosetta: .asciz "Rosetta code"
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szMessTest1: .asciz "abc"
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szMessSup64: .ascii "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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.ascii "abcdefghijklmnopqrstuvwxyz"
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.asciz "1234567890AZERTYUIOP"
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szMessTest2: .asciz "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"
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szMessFinPgm: .asciz "Program End ok.\n"
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szMessResult: .asciz "Rosetta code => "
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szCarriageReturn: .asciz "\n"
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/* array constantes Hi */
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tbConstHi: .int 0x6A09E667 @ H0
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.int 0xBB67AE85 @ H1
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.int 0x3C6EF372 @ H2
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.int 0xA54FF53A @ H3
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.int 0x510E527F @ H4
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.int 0x9B05688C @ H5
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.int 0x1F83D9AB @ H6
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.int 0x5BE0CD19 @ H7
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/* array 64 constantes Kt */
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tbConstKt:
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.int 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5
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.int 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174
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.int 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da
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.int 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967
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.int 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85
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.int 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070
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.int 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3
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.int 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
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/*********************************/
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/* UnInitialized data */
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/*********************************/
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.bss
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.align 4
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iNbBlocs: .skip 4
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sZoneConv: .skip 24
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sZoneTrav: .skip 1000
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.align 8
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tbH: .skip 4 * 8 @ 8 variables H
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tbabcdefgh: .skip 4 * 8
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tbW: .skip 4 * 64 @ 64 words W
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/*********************************/
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/* code section */
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/*********************************/
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.text
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.global main
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main: @ entry of program
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ldr r0,iAdrszMessRosetta
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//ldr r0,iAdrszMessTest1
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//ldr r0,iAdrszMessTest2
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//ldr r0,iAdrszMessSup64
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bl computeSHA256 @ call routine SHA1
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ldr r0,iAdrszMessResult
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bl affichageMess @ display message
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ldr r0, iAdrtbH
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bl displaySHA1
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ldr r0,iAdrszMessFinPgm
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bl affichageMess @ display message
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100: @ standard end of the program
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mov r0, #0 @ return code
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mov r7, #EXIT @ request to exit program
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svc #0 @ perform the system call
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iAdrszCarriageReturn: .int szCarriageReturn
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iAdrszMessResult: .int szMessResult
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iAdrszMessRosetta: .int szMessRosetta
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iAdrszMessTest1: .int szMessTest1
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iAdrszMessTest2: .int szMessTest2
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iAdrsZoneTrav: .int sZoneTrav
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iAdrsZoneConv: .int sZoneConv
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iAdrszMessFinPgm: .int szMessFinPgm
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iAdrszMessSup64: .int szMessSup64
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/******************************************************************/
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/* compute SHA1 */
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/******************************************************************/
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/* r0 contains the address of the message */
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computeSHA256:
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push {r1-r12,lr} @ save registres
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ldr r1,iAdrsZoneTrav
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mov r2,#0 @ counter length
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debCopy: @ copy string in work area
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ldrb r3,[r0,r2]
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strb r3,[r1,r2]
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cmp r3,#0
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addne r2,r2,#1
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bne debCopy
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lsl r6,r2,#3 @ initial message length in bits
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mov r3,#0b10000000 @ add bit 1 at end of string
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strb r3,[r1,r2]
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add r2,r2,#1 @ length in bytes
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lsl r4,r2,#3 @ length in bits
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mov r3,#0
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addZeroes:
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lsr r5,r2,#6
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lsl r5,r5,#6
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sub r5,r2,r5
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cmp r5,#56
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beq storeLength @ yes -> end add
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strb r3,[r1,r2] @ add zero at message end
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add r2,#1 @ increment lenght bytes
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add r4,#8 @ increment length in bits
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b addZeroes
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storeLength:
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add r2,#4 @ add four bytes
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rev r6,r6 @ inversion bits initials message length
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str r6,[r1,r2] @ and store at end
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ldr r7,iAdrtbConstHi @ constantes H address
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ldr r4,iAdrtbH @ start area H
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mov r5,#0
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loopConst: @ init array H with start constantes
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ldr r6,[r7,r5,lsl #2] @ load constante
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str r6,[r4,r5,lsl #2] @ and store
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add r5,r5,#1
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cmp r5,#8
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blt loopConst
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@ split into block of 64 bytes
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add r2,#4 @ TODO : à revoir
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lsr r4,r2,#6 @ blocks number
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ldr r0,iAdriNbBlocs
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str r4,[r0] @ save block maxi
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mov r7,#0 @ n° de block et r1 contient l adresse zone de travail
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loopBlock: @ begin loop of each block of 64 bytes
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mov r0,r7
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bl inversion @ inversion each word because little indian
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ldr r3,iAdrtbW @ working area W address
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mov r6,#0 @ indice t
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/* r2 address begin each block */
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ldr r1,iAdrsZoneTrav
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add r2,r1,r7,lsl #6 @ compute block begin indice * 4 * 16
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//vidregtit avantloop
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//mov r0,r2
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//vidmemtit verifBloc r0 10
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loopPrep: @ loop for expand 80 words
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cmp r6,#15 @
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bgt expand1
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ldr r0,[r2,r6,lsl #2] @ load byte message
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str r0,[r3,r6,lsl #2] @ store in first 16 block
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b expandEnd
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expand1:
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sub r8,r6,#2
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ldr r9,[r3,r8,lsl #2]
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ror r10,r9,#17 @ fonction e1 (256)
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ror r11,r9,#19
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eor r10,r10,r11
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lsr r11,r9,#10
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eor r10,r10,r11
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sub r8,r6,#7
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ldr r9,[r3,r8,lsl #2]
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add r9,r9,r10 @ + w - 7
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sub r8,r6,#15
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ldr r10,[r3,r8,lsl #2]
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ror r11,r10,#7 @ fonction e0 (256)
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ror r12,r10,#18
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eor r11,r12
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lsr r12,r10,#3
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eor r10,r11,r12
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add r9,r9,r10
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sub r8,r6,#16
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ldr r11,[r3,r8,lsl #2]
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add r9,r9,r11
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str r9,[r3,r6,lsl #2]
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expandEnd:
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add r6,r6,#1
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cmp r6,#64 @ 64 words ?
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blt loopPrep @ and loop
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/* COMPUTING THE MESSAGE DIGEST */
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/* r1 area H constantes address */
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/* r3 working area W address */
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/* r5 address constantes K */
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/* r6 counter t */
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/* r7 block counter */
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/* r8 addresse variables a b c d e f g h */
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//ldr r0,iAdrtbW
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//vidmemtit verifW80 r0 20
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@ init variable a b c d e f g h
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ldr r0,iAdrtbH
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ldr r8,iAdrtbabcdefgh
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mov r1,#0
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loopInita:
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ldr r9,[r0,r1,lsl #2]
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str r9,[r8,r1,lsl #2]
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add r1,r1,#1
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cmp r1,#8
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blt loopInita
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ldr r1,iAdrtbConstHi
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ldr r5,iAdrtbConstKt
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mov r6,#0
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loop64T: @ begin loop 64 t
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ldr r9,[r8,#var_h]
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ldr r10,[r8,#var_e] @ calcul T1
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ror r11,r10,#6 @ fonction sigma 1
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ror r12,r10,#11
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eor r11,r12
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ror r12,r10,#25
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eor r11,r12
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add r9,r9,r11 @ h + sigma1 (e)
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ldr r0,[r8,#var_f] @ fonction ch x and y xor (non x and z)
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ldr r4,[r8,#var_g]
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and r11,r10,r0
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mvn r12,r10
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and r12,r12,r4
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eor r11,r12
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add r9,r9,r11 @ h + sigma1 (e) + ch (e,f,g)
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ldr r0,[r5,r6,lsl #2] @ load constantes k0
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add r9,r9,r0
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ldr r0,[r3,r6,lsl #2] @ Wt
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add r9,r9,r0
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@ calcul T2
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ldr r10,[r8,#var_a] @ fonction sigma 0
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ror r11,r10,#2
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ror r12,r10,#13
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eor r11,r11,r12
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ror r12,r10,#22
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eor r11,r11,r12
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ldr r2,[r8,#var_b]
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ldr r4,[r8,#var_c]
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@ fonction maj x and y xor x and z xor y and z
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and r12,r10,r2
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and r0,r10,r4
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eor r12,r12,r0
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and r0,r2,r4
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eor r12,r12,r0 @
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add r12,r12,r11 @ T2
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@ compute variables
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ldr r4,[r8,#var_g]
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str r4,[r8,#var_h]
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ldr r4,[r8,#var_f]
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str r4,[r8,#var_g]
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ldr r4,[r8,#var_e]
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str r4,[r8,#var_f]
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ldr r4,[r8,#var_d]
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add r4,r4,r9 @ add T1
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str r4,[r8,#var_e]
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ldr r4,[r8,#var_c]
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str r4,[r8,#var_d]
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ldr r4,[r8,#var_b]
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str r4,[r8,#var_c]
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ldr r4,[r8,#var_a]
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str r4,[r8,#var_b]
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add r4,r9,r12 @ add T1 T2
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str r4,[r8,#var_a]
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mov r0,r8
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add r6,r6,#1 @ increment t
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cmp r6,#64
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blt loop64T
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@ End block
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ldr r0,iAdrtbH @ start area H
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mov r10,#0
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loopStoreH:
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ldr r9,[r8,r10,lsl #2]
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ldr r3,[r0,r10,lsl #2]
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add r3,r9
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str r3,[r0,r10,lsl #2] @ store variables in H0
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add r10,r10,#1
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cmp r10,#8
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blt loopStoreH
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@ other bloc
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add r7,#1 @ increment block
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ldr r0,iAdriNbBlocs
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ldr r4,[r0] @ restaur maxi block
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cmp r7,r4 @ maxi ?
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blt loopBlock @ loop other block
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mov r0,#0 @ routine OK
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100:
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pop {r1-r12,lr} @ restaur registers
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bx lr @ return
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iAdrtbConstHi: .int tbConstHi
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iAdrtbConstKt: .int tbConstKt
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iAdrtbH: .int tbH
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iAdrtbW: .int tbW
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iAdrtbabcdefgh: .int tbabcdefgh
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iAdriNbBlocs: .int iNbBlocs
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/******************************************************************/
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/* inversion des mots de 32 bits d un bloc */
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/******************************************************************/
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/* r0 contains N° block */
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inversion:
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push {r1-r3,lr} @ save registers
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ldr r1,iAdrsZoneTrav
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add r1,r0,lsl #6 @ debut du bloc
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mov r2,#0
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1: @ start loop
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ldr r3,[r1,r2,lsl #2]
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rev r3,r3
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str r3,[r1,r2,lsl #2]
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add r2,r2,#1
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cmp r2,#16
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blt 1b
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100:
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pop {r1-r3,lr} @ restaur registres
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bx lr @return
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/******************************************************************/
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/* display hash SHA1 */
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/******************************************************************/
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/* r0 contains the address of hash */
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displaySHA1:
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push {r1-r3,lr} @ save registres
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mov r3,r0
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mov r2,#0
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1:
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ldr r0,[r3,r2,lsl #2] @ load 4 bytes
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//rev r0,r0 @ reverse bytes
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ldr r1,iAdrsZoneConv
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bl conversion16 @ conversion hexa
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ldr r0,iAdrsZoneConv
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bl affichageMess
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add r2,r2,#1
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cmp r2,#LGHASH / 4
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blt 1b @ and loop
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ldr r0,iAdrszCarriageReturn
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bl affichageMess @ display message
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100:
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pop {r1-r3,lr} @ restaur registers
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bx lr @ return
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/***************************************************/
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/* ROUTINES INCLUDE */
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/***************************************************/
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.include "../affichage.inc"
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