Commit 8eab8d36 authored by Paul Bakker's avatar Paul Bakker
Browse files

Merge more portable AES-NI

parents 33dc46b0 63a5bfe9
......@@ -12,6 +12,7 @@ Changes
checked and filled in the relevant module headers
* Debug module only outputs full lines instead of parts
* Better support for the different Attribute Types from IETF PKIX (RFC 5280)
* AES-NI now compiles with "old" assemblers too
Bugfix
* Only iterate over actual certificates in ssl_write_certificate_request()
......
......@@ -58,6 +58,32 @@ int aesni_supports( unsigned int what )
return( ( c & what ) != 0 );
}
/*
* Binutils needs to be at least 2.19 to support AES-NI instructions.
* Unfortunately, a lot of users have a lower version now (2014-04).
* Emit bytecode directly in order to support "old" version of gas.
*
* Opcodes from the Intel architecture reference manual, vol. 3.
* We always use registers, so we don't need prefixes for memory operands.
* Operand macros are in gas order (src, dst) as opposed to Intel order
* (dst, src) in order to blend better into the surrounding assembly code.
*/
#define AESDEC ".byte 0x66,0x0F,0x38,0xDE,"
#define AESDECLAST ".byte 0x66,0x0F,0x38,0xDF,"
#define AESENC ".byte 0x66,0x0F,0x38,0xDC,"
#define AESENCLAST ".byte 0x66,0x0F,0x38,0xDD,"
#define AESIMC ".byte 0x66,0x0F,0x38,0xDB,"
#define AESKEYGENA ".byte 0x66,0x0F,0x3A,0xDF,"
#define PCLMULQDQ ".byte 0x66,0x0F,0x3A,0x44,"
#define xmm0_xmm0 "0xC0"
#define xmm0_xmm1 "0xC8"
#define xmm0_xmm2 "0xD0"
#define xmm0_xmm3 "0xD8"
#define xmm0_xmm4 "0xE0"
#define xmm1_xmm0 "0xC1"
#define xmm1_xmm2 "0xD1"
/*
* AES-NI AES-ECB block en(de)cryption
*/
......@@ -76,22 +102,22 @@ int aesni_crypt_ecb( aes_context *ctx,
"1: \n" // encryption loop
"movdqu (%1), %%xmm1 \n" // load round key
"aesenc %%xmm1, %%xmm0 \n" // do round
AESENC xmm1_xmm0 "\n" // do round
"addq $16, %1 \n" // point to next round key
"subl $1, %0 \n" // loop
"jnz 1b \n"
"movdqu (%1), %%xmm1 \n" // load round key
"aesenclast %%xmm1, %%xmm0 \n" // last round
AESENCLAST xmm1_xmm0 "\n" // last round
"jmp 3f \n"
"2: \n" // decryption loop
"movdqu (%1), %%xmm1 \n"
"aesdec %%xmm1, %%xmm0 \n"
AESDEC xmm1_xmm0 "\n" // do round
"addq $16, %1 \n"
"subl $1, %0 \n"
"jnz 2b \n"
"movdqu (%1), %%xmm1 \n" // load round key
"aesdeclast %%xmm1, %%xmm0 \n" // last round
AESDECLAST xmm1_xmm0 "\n" // last round
"3: \n"
"movdqu %%xmm0, (%4) \n" // export output
......@@ -131,10 +157,10 @@ void aesni_gcm_mult( unsigned char c[16],
"movdqa %%xmm1, %%xmm2 \n" // copy of b1:b0
"movdqa %%xmm1, %%xmm3 \n" // same
"movdqa %%xmm1, %%xmm4 \n" // same
"pclmulqdq $0x00, %%xmm0, %%xmm1 \n" // a0*b0 = c1:c0
"pclmulqdq $0x11, %%xmm0, %%xmm2 \n" // a1*b1 = d1:d0
"pclmulqdq $0x10, %%xmm0, %%xmm3 \n" // a0*b1 = e1:e0
"pclmulqdq $0x01, %%xmm0, %%xmm4 \n" // a1*b0 = f1:f0
PCLMULQDQ xmm0_xmm1 ",0x00 \n" // a0*b0 = c1:c0
PCLMULQDQ xmm0_xmm2 ",0x11 \n" // a1*b1 = d1:d0
PCLMULQDQ xmm0_xmm3 ",0x10 \n" // a0*b1 = e1:e0
PCLMULQDQ xmm0_xmm4 ",0x01 \n" // a1*b0 = f1:f0
"pxor %%xmm3, %%xmm4 \n" // e1+f1:e0+f0
"movdqa %%xmm4, %%xmm3 \n" // same
"psrldq $8, %%xmm4 \n" // 0:e1+f1
......@@ -228,7 +254,7 @@ void aesni_inverse_key( unsigned char *invkey,
for( fk -= 16, ik += 16; fk > fwdkey; fk -= 16, ik += 16 )
asm( "movdqu (%0), %%xmm0 \n"
"aesimc %%xmm0, %%xmm0 \n"
AESIMC xmm0_xmm0 "\n"
"movdqu %%xmm0, (%1) \n"
:
: "r" (fk), "r" (ik)
......@@ -272,16 +298,16 @@ static void aesni_setkey_enc_128( unsigned char *rk,
/* Main "loop" */
"2: \n"
"aeskeygenassist $0x01, %%xmm0, %%xmm1 \ncall 1b \n"
"aeskeygenassist $0x02, %%xmm0, %%xmm1 \ncall 1b \n"
"aeskeygenassist $0x04, %%xmm0, %%xmm1 \ncall 1b \n"
"aeskeygenassist $0x08, %%xmm0, %%xmm1 \ncall 1b \n"
"aeskeygenassist $0x10, %%xmm0, %%xmm1 \ncall 1b \n"
"aeskeygenassist $0x20, %%xmm0, %%xmm1 \ncall 1b \n"
"aeskeygenassist $0x40, %%xmm0, %%xmm1 \ncall 1b \n"
"aeskeygenassist $0x80, %%xmm0, %%xmm1 \ncall 1b \n"
"aeskeygenassist $0x1B, %%xmm0, %%xmm1 \ncall 1b \n"
"aeskeygenassist $0x36, %%xmm0, %%xmm1 \ncall 1b \n"
AESKEYGENA xmm0_xmm1 ",0x01 \ncall 1b \n"
AESKEYGENA xmm0_xmm1 ",0x02 \ncall 1b \n"
AESKEYGENA xmm0_xmm1 ",0x04 \ncall 1b \n"
AESKEYGENA xmm0_xmm1 ",0x08 \ncall 1b \n"
AESKEYGENA xmm0_xmm1 ",0x10 \ncall 1b \n"
AESKEYGENA xmm0_xmm1 ",0x20 \ncall 1b \n"
AESKEYGENA xmm0_xmm1 ",0x40 \ncall 1b \n"
AESKEYGENA xmm0_xmm1 ",0x80 \ncall 1b \n"
AESKEYGENA xmm0_xmm1 ",0x1B \ncall 1b \n"
AESKEYGENA xmm0_xmm1 ",0x36 \ncall 1b \n"
:
: "r" (rk), "r" (key)
: "memory", "cc", "0" );
......@@ -330,14 +356,14 @@ static void aesni_setkey_enc_192( unsigned char *rk,
"ret \n"
"2: \n"
"aeskeygenassist $0x01, %%xmm1, %%xmm2 \ncall 1b \n"
"aeskeygenassist $0x02, %%xmm1, %%xmm2 \ncall 1b \n"
"aeskeygenassist $0x04, %%xmm1, %%xmm2 \ncall 1b \n"
"aeskeygenassist $0x08, %%xmm1, %%xmm2 \ncall 1b \n"
"aeskeygenassist $0x10, %%xmm1, %%xmm2 \ncall 1b \n"
"aeskeygenassist $0x20, %%xmm1, %%xmm2 \ncall 1b \n"
"aeskeygenassist $0x40, %%xmm1, %%xmm2 \ncall 1b \n"
"aeskeygenassist $0x80, %%xmm1, %%xmm2 \ncall 1b \n"
AESKEYGENA xmm1_xmm2 ",0x01 \ncall 1b \n"
AESKEYGENA xmm1_xmm2 ",0x02 \ncall 1b \n"
AESKEYGENA xmm1_xmm2 ",0x04 \ncall 1b \n"
AESKEYGENA xmm1_xmm2 ",0x08 \ncall 1b \n"
AESKEYGENA xmm1_xmm2 ",0x10 \ncall 1b \n"
AESKEYGENA xmm1_xmm2 ",0x20 \ncall 1b \n"
AESKEYGENA xmm1_xmm2 ",0x40 \ncall 1b \n"
AESKEYGENA xmm1_xmm2 ",0x80 \ncall 1b \n"
:
: "r" (rk), "r" (key)
......@@ -380,7 +406,7 @@ static void aesni_setkey_enc_256( unsigned char *rk,
/* Set xmm2 to stuff:Y:stuff:stuff with Y = subword( r11 )
* and proceed to generate next round key from there */
"aeskeygenassist $0, %%xmm0, %%xmm2\n"
AESKEYGENA xmm0_xmm2 ",0x00 \n"
"pshufd $0xaa, %%xmm2, %%xmm2 \n"
"pxor %%xmm1, %%xmm2 \n"
"pslldq $4, %%xmm1 \n"
......@@ -398,13 +424,13 @@ static void aesni_setkey_enc_256( unsigned char *rk,
* see definition of aes_context.buf
*/
"2: \n"
"aeskeygenassist $0x01, %%xmm1, %%xmm2 \ncall 1b \n"
"aeskeygenassist $0x02, %%xmm1, %%xmm2 \ncall 1b \n"
"aeskeygenassist $0x04, %%xmm1, %%xmm2 \ncall 1b \n"
"aeskeygenassist $0x08, %%xmm1, %%xmm2 \ncall 1b \n"
"aeskeygenassist $0x10, %%xmm1, %%xmm2 \ncall 1b \n"
"aeskeygenassist $0x20, %%xmm1, %%xmm2 \ncall 1b \n"
"aeskeygenassist $0x40, %%xmm1, %%xmm2 \ncall 1b \n"
AESKEYGENA xmm1_xmm2 ",0x01 \ncall 1b \n"
AESKEYGENA xmm1_xmm2 ",0x02 \ncall 1b \n"
AESKEYGENA xmm1_xmm2 ",0x04 \ncall 1b \n"
AESKEYGENA xmm1_xmm2 ",0x08 \ncall 1b \n"
AESKEYGENA xmm1_xmm2 ",0x10 \ncall 1b \n"
AESKEYGENA xmm1_xmm2 ",0x20 \ncall 1b \n"
AESKEYGENA xmm1_xmm2 ",0x40 \ncall 1b \n"
:
: "r" (rk), "r" (key)
: "memory", "cc", "0" );
......
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