#include "../AESAssembly.h" // Generate object code only if this implementation has been requested. #if defined UseAESedp_IntelAssembly /* AES.s -- Core AES routines for Intel processors. Written by Eric Postpischil, December 13, 2007. */ /* We build these AES routines as a single module because the routines refer to labels in Data.s and it is easier and faster to refer to them as local labels. A local label can be referred to with position-independent assembler expressions such as "label-base(register)", where <base> is a local label whose address has been loaded into <register>. (On i386, this is typically done with the idiom of a call to the next instrution and a pop of that return address into a register.) Without local labels, the references must be done using spaces for addresses "lazy symbols" that are filled in by the dynamic loader and loaded by the code that wants the address. So the various routines in other files are assembled here via #include directives. */ #include "Data.s" #define TableSize (256*4) /* Each of the arrays defined in Data.s except for the round constants in _AESRcon is composed of four tables of 256 entries of four bytes each. TableSize is the number of bytes in one of those four tables. */ /* Define a macro to select a value based on architecture. This reduces some of the architecture conditionalization later in the source. */ #if defined __i386__ #define Arch(i386, x86_64) i386 #elif defined __x86_64__ #define Arch(i386, x86_64) x86_64 #endif // Define an instruction for moving pointers. #define movp Arch(movd, movd) // Latter argument should be "movq", but the assembler uses "movd". /* Rename the general registers. This makes it easier to keep track of them and provides names for the "whole register" that are uniform between i386 and x86_64. */ #if defined __i386__ #define r0 %eax // Available for any use. #define r1 %ecx // Available for any use, some special purposes (loop). #define r2 %edx // Available for any use. #define r3 %ebx // Must be preserved by called routine. #define r4 %esp // Stack pointer. #define r5 %ebp // Frame pointer, must preserve, no bare indirect. #define r6 %esi // Must be preserved by called routine. #define r7 %edi // Must be preserved by called routine. #elif defined __x86_64__ #define r0 %rax // Available for any use. #define r1 %rcx // Available for any use. #define r2 %rdx // Available for any use. #define r3 %rbx // Must be preserved by called routine. #define r4 %rsp // Stack pointer. #define r5 %rbp // Frame pointer. Must be preserved by called routine. #define r6 %rsi // Available for any use. #define r7 %rdi // Available for any use. #define r8 %r8 // Available for any use. #define r9 %r9 // Available for any use. #define r10 %r10 // Available for any use. #define r11 %r11 // Available for any use. #define r12 %r12 // Must be preserved by called routine. #define r13 %r13 // Must be preserved by called routine. #define r14 %r14 // Must be preserved by called routine. #define r15 %r15 // Must be preserved by called routine. #else #error "Unknown architecture." #endif // Define names for parts of registers. #define r0d %eax // Low 32 bits of r0. #define r1d %ecx // Low 32 bits of r1. #define r2d %edx // Low 32 bits of r2. #define r3d %ebx // Low 32 bits of r3. #define r5d %ebp // Low 32 bits of r5. #define r6d %esi // Low 32 bits of r6. #define r7d %edi // Low 32 bits of r7. #define r8d %r8d // Low 32 bits of r8. #define r9d %r9d // Low 32 bits of r9. #define r11d %r11d // Low 32 bits of r11. #define r0l %al // Low byte of r0. #define r1l %cl // Low byte of r1. #define r2l %dl // Low byte of r2. #define r3l %bl // Low byte of r3. #define r5l %bpl // Low byte of r5. #define r0h %ah // Second lowest byte of r0. #define r1h %ch // Second lowest byte of r1. #define r2h %dh // Second lowest byte of r2. #define r3h %bh // Second lowest byte of r3. .text // Define encryption routine, _AESEncryptWithExpandedKey #define Select 0 #include "EncryptDecrypt.s" #undef Select // Define decryption routine, _AESDecryptWithExpandedKey #define Select 1 #include "EncryptDecrypt.s" #undef Select // Define key expansion routine for encryption, _AESExpandKeyForEncryption. #include "ExpandKeyForEncryption.s" // Define key expansion for decryption routine, _AESExpandKeyForDecryption. #include "ExpandKeyForDecryption.s" #endif // defined UseAESedp_IntelAssembly