mirror of
https://github.com/Mbed-TLS/mbedtls.git
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Switch to the new code style
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine
254
library/aesni.c
254
library/aesni.c
@ -28,7 +28,8 @@
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#if defined(__has_feature)
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#if __has_feature(memory_sanitizer)
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#warning "MBEDTLS_AESNI_C is known to cause spurious error reports with some memory sanitizers as they do not understand the assembly code."
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#warning \
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"MBEDTLS_AESNI_C is known to cause spurious error reports with some memory sanitizers as they do not understand the assembly code."
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#endif
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#endif
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@ -47,22 +48,21 @@
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/*
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* AES-NI support detection routine
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*/
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int mbedtls_aesni_has_support( unsigned int what )
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int mbedtls_aesni_has_support(unsigned int what)
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{
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static int done = 0;
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static unsigned int c = 0;
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if( ! done )
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{
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asm( "movl $1, %%eax \n\t"
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if (!done) {
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asm ("movl $1, %%eax \n\t"
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"cpuid \n\t"
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: "=c" (c)
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:
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: "eax", "ebx", "edx" );
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: "eax", "ebx", "edx");
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done = 1;
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}
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return( ( c & what ) != 0 );
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return (c & what) != 0;
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}
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/*
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@ -94,12 +94,12 @@ int mbedtls_aesni_has_support( unsigned int what )
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/*
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* AES-NI AES-ECB block en(de)cryption
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*/
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int mbedtls_aesni_crypt_ecb( mbedtls_aes_context *ctx,
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int mode,
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const unsigned char input[16],
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unsigned char output[16] )
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int mbedtls_aesni_crypt_ecb(mbedtls_aes_context *ctx,
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int mode,
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const unsigned char input[16],
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unsigned char output[16])
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{
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asm( "movdqu (%3), %%xmm0 \n\t" // load input
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asm ("movdqu (%3), %%xmm0 \n\t" // load input
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"movdqu (%1), %%xmm1 \n\t" // load round key 0
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"pxor %%xmm1, %%xmm0 \n\t" // round 0
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"add $16, %1 \n\t" // point to next round key
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@ -110,51 +110,50 @@ int mbedtls_aesni_crypt_ecb( mbedtls_aes_context *ctx,
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"1: \n\t" // encryption loop
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"movdqu (%1), %%xmm1 \n\t" // load round key
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AESENC xmm1_xmm0 "\n\t" // do round
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"add $16, %1 \n\t" // point to next round key
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"subl $1, %0 \n\t" // loop
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"jnz 1b \n\t"
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"movdqu (%1), %%xmm1 \n\t" // load round key
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"add $16, %1 \n\t" // point to next round key
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"subl $1, %0 \n\t" // loop
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"jnz 1b \n\t"
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"movdqu (%1), %%xmm1 \n\t" // load round key
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AESENCLAST xmm1_xmm0 "\n\t" // last round
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"jmp 3f \n\t"
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"jmp 3f \n\t"
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"2: \n\t" // decryption loop
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"movdqu (%1), %%xmm1 \n\t"
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"2: \n\t" // decryption loop
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"movdqu (%1), %%xmm1 \n\t"
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AESDEC xmm1_xmm0 "\n\t" // do round
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"add $16, %1 \n\t"
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"subl $1, %0 \n\t"
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"jnz 2b \n\t"
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"movdqu (%1), %%xmm1 \n\t" // load round key
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"add $16, %1 \n\t"
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"subl $1, %0 \n\t"
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"jnz 2b \n\t"
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"movdqu (%1), %%xmm1 \n\t" // load round key
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AESDECLAST xmm1_xmm0 "\n\t" // last round
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"3: \n\t"
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"movdqu %%xmm0, (%4) \n\t" // export output
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"3: \n\t"
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"movdqu %%xmm0, (%4) \n\t" // export output
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:
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: "r" (ctx->nr), "r" (ctx->rk), "r" (mode), "r" (input), "r" (output)
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: "memory", "cc", "xmm0", "xmm1" );
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: "memory", "cc", "xmm0", "xmm1");
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return( 0 );
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return 0;
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}
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/*
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* GCM multiplication: c = a times b in GF(2^128)
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* Based on [CLMUL-WP] algorithms 1 (with equation 27) and 5.
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*/
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void mbedtls_aesni_gcm_mult( unsigned char c[16],
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const unsigned char a[16],
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const unsigned char b[16] )
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void mbedtls_aesni_gcm_mult(unsigned char c[16],
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const unsigned char a[16],
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const unsigned char b[16])
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{
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unsigned char aa[16], bb[16], cc[16];
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size_t i;
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/* The inputs are in big-endian order, so byte-reverse them */
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for( i = 0; i < 16; i++ )
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{
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for (i = 0; i < 16; i++) {
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aa[i] = a[15 - i];
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bb[i] = b[15 - i];
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}
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asm( "movdqu (%0), %%xmm0 \n\t" // a1:a0
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asm ("movdqu (%0), %%xmm0 \n\t" // a1:a0
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"movdqu (%1), %%xmm1 \n\t" // b1:b0
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/*
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@ -168,30 +167,30 @@ void mbedtls_aesni_gcm_mult( unsigned char c[16],
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PCLMULQDQ xmm0_xmm2 ",0x11 \n\t" // a1*b1 = d1:d0
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PCLMULQDQ xmm0_xmm3 ",0x10 \n\t" // a0*b1 = e1:e0
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PCLMULQDQ xmm0_xmm4 ",0x01 \n\t" // a1*b0 = f1:f0
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"pxor %%xmm3, %%xmm4 \n\t" // e1+f1:e0+f0
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"movdqa %%xmm4, %%xmm3 \n\t" // same
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"psrldq $8, %%xmm4 \n\t" // 0:e1+f1
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"pslldq $8, %%xmm3 \n\t" // e0+f0:0
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"pxor %%xmm4, %%xmm2 \n\t" // d1:d0+e1+f1
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"pxor %%xmm3, %%xmm1 \n\t" // c1+e0+f1:c0
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"pxor %%xmm3, %%xmm4 \n\t" // e1+f1:e0+f0
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"movdqa %%xmm4, %%xmm3 \n\t" // same
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"psrldq $8, %%xmm4 \n\t" // 0:e1+f1
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"pslldq $8, %%xmm3 \n\t" // e0+f0:0
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"pxor %%xmm4, %%xmm2 \n\t" // d1:d0+e1+f1
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"pxor %%xmm3, %%xmm1 \n\t" // c1+e0+f1:c0
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/*
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* Now shift the result one bit to the left,
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* taking advantage of [CLMUL-WP] eq 27 (p. 20)
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*/
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"movdqa %%xmm1, %%xmm3 \n\t" // r1:r0
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"movdqa %%xmm2, %%xmm4 \n\t" // r3:r2
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"psllq $1, %%xmm1 \n\t" // r1<<1:r0<<1
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"psllq $1, %%xmm2 \n\t" // r3<<1:r2<<1
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"psrlq $63, %%xmm3 \n\t" // r1>>63:r0>>63
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"psrlq $63, %%xmm4 \n\t" // r3>>63:r2>>63
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"movdqa %%xmm3, %%xmm5 \n\t" // r1>>63:r0>>63
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"pslldq $8, %%xmm3 \n\t" // r0>>63:0
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"pslldq $8, %%xmm4 \n\t" // r2>>63:0
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"psrldq $8, %%xmm5 \n\t" // 0:r1>>63
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"por %%xmm3, %%xmm1 \n\t" // r1<<1|r0>>63:r0<<1
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"por %%xmm4, %%xmm2 \n\t" // r3<<1|r2>>62:r2<<1
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"por %%xmm5, %%xmm2 \n\t" // r3<<1|r2>>62:r2<<1|r1>>63
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"movdqa %%xmm1, %%xmm3 \n\t" // r1:r0
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"movdqa %%xmm2, %%xmm4 \n\t" // r3:r2
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"psllq $1, %%xmm1 \n\t" // r1<<1:r0<<1
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"psllq $1, %%xmm2 \n\t" // r3<<1:r2<<1
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"psrlq $63, %%xmm3 \n\t" // r1>>63:r0>>63
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"psrlq $63, %%xmm4 \n\t" // r3>>63:r2>>63
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"movdqa %%xmm3, %%xmm5 \n\t" // r1>>63:r0>>63
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"pslldq $8, %%xmm3 \n\t" // r0>>63:0
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"pslldq $8, %%xmm4 \n\t" // r2>>63:0
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"psrldq $8, %%xmm5 \n\t" // 0:r1>>63
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"por %%xmm3, %%xmm1 \n\t" // r1<<1|r0>>63:r0<<1
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"por %%xmm4, %%xmm2 \n\t" // r3<<1|r2>>62:r2<<1
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"por %%xmm5, %%xmm2 \n\t" // r3<<1|r2>>62:r2<<1|r1>>63
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/*
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* Now reduce modulo the GCM polynomial x^128 + x^7 + x^2 + x + 1
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@ -199,51 +198,52 @@ void mbedtls_aesni_gcm_mult( unsigned char c[16],
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* Currently xmm2:xmm1 holds x3:x2:x1:x0 (already shifted).
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*/
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/* Step 2 (1) */
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"movdqa %%xmm1, %%xmm3 \n\t" // x1:x0
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"movdqa %%xmm1, %%xmm4 \n\t" // same
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"movdqa %%xmm1, %%xmm5 \n\t" // same
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"psllq $63, %%xmm3 \n\t" // x1<<63:x0<<63 = stuff:a
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"psllq $62, %%xmm4 \n\t" // x1<<62:x0<<62 = stuff:b
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"psllq $57, %%xmm5 \n\t" // x1<<57:x0<<57 = stuff:c
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"movdqa %%xmm1, %%xmm3 \n\t" // x1:x0
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"movdqa %%xmm1, %%xmm4 \n\t" // same
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"movdqa %%xmm1, %%xmm5 \n\t" // same
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"psllq $63, %%xmm3 \n\t" // x1<<63:x0<<63 = stuff:a
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"psllq $62, %%xmm4 \n\t" // x1<<62:x0<<62 = stuff:b
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"psllq $57, %%xmm5 \n\t" // x1<<57:x0<<57 = stuff:c
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/* Step 2 (2) */
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"pxor %%xmm4, %%xmm3 \n\t" // stuff:a+b
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"pxor %%xmm5, %%xmm3 \n\t" // stuff:a+b+c
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"pslldq $8, %%xmm3 \n\t" // a+b+c:0
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"pxor %%xmm3, %%xmm1 \n\t" // x1+a+b+c:x0 = d:x0
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"pxor %%xmm4, %%xmm3 \n\t" // stuff:a+b
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"pxor %%xmm5, %%xmm3 \n\t" // stuff:a+b+c
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"pslldq $8, %%xmm3 \n\t" // a+b+c:0
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"pxor %%xmm3, %%xmm1 \n\t" // x1+a+b+c:x0 = d:x0
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/* Steps 3 and 4 */
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"movdqa %%xmm1,%%xmm0 \n\t" // d:x0
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"movdqa %%xmm1,%%xmm4 \n\t" // same
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"movdqa %%xmm1,%%xmm5 \n\t" // same
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"psrlq $1, %%xmm0 \n\t" // e1:x0>>1 = e1:e0'
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"psrlq $2, %%xmm4 \n\t" // f1:x0>>2 = f1:f0'
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"psrlq $7, %%xmm5 \n\t" // g1:x0>>7 = g1:g0'
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"pxor %%xmm4, %%xmm0 \n\t" // e1+f1:e0'+f0'
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"pxor %%xmm5, %%xmm0 \n\t" // e1+f1+g1:e0'+f0'+g0'
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"movdqa %%xmm1,%%xmm0 \n\t" // d:x0
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"movdqa %%xmm1,%%xmm4 \n\t" // same
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"movdqa %%xmm1,%%xmm5 \n\t" // same
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"psrlq $1, %%xmm0 \n\t" // e1:x0>>1 = e1:e0'
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"psrlq $2, %%xmm4 \n\t" // f1:x0>>2 = f1:f0'
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"psrlq $7, %%xmm5 \n\t" // g1:x0>>7 = g1:g0'
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"pxor %%xmm4, %%xmm0 \n\t" // e1+f1:e0'+f0'
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"pxor %%xmm5, %%xmm0 \n\t" // e1+f1+g1:e0'+f0'+g0'
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// e0'+f0'+g0' is almost e0+f0+g0, ex\tcept for some missing
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// bits carried from d. Now get those\t bits back in.
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"movdqa %%xmm1,%%xmm3 \n\t" // d:x0
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"movdqa %%xmm1,%%xmm4 \n\t" // same
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"movdqa %%xmm1,%%xmm5 \n\t" // same
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"psllq $63, %%xmm3 \n\t" // d<<63:stuff
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"psllq $62, %%xmm4 \n\t" // d<<62:stuff
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"psllq $57, %%xmm5 \n\t" // d<<57:stuff
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"pxor %%xmm4, %%xmm3 \n\t" // d<<63+d<<62:stuff
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"pxor %%xmm5, %%xmm3 \n\t" // missing bits of d:stuff
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"psrldq $8, %%xmm3 \n\t" // 0:missing bits of d
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"pxor %%xmm3, %%xmm0 \n\t" // e1+f1+g1:e0+f0+g0
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"pxor %%xmm1, %%xmm0 \n\t" // h1:h0
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"pxor %%xmm2, %%xmm0 \n\t" // x3+h1:x2+h0
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"movdqa %%xmm1,%%xmm3 \n\t" // d:x0
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"movdqa %%xmm1,%%xmm4 \n\t" // same
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"movdqa %%xmm1,%%xmm5 \n\t" // same
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"psllq $63, %%xmm3 \n\t" // d<<63:stuff
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"psllq $62, %%xmm4 \n\t" // d<<62:stuff
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"psllq $57, %%xmm5 \n\t" // d<<57:stuff
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"pxor %%xmm4, %%xmm3 \n\t" // d<<63+d<<62:stuff
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"pxor %%xmm5, %%xmm3 \n\t" // missing bits of d:stuff
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"psrldq $8, %%xmm3 \n\t" // 0:missing bits of d
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"pxor %%xmm3, %%xmm0 \n\t" // e1+f1+g1:e0+f0+g0
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"pxor %%xmm1, %%xmm0 \n\t" // h1:h0
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"pxor %%xmm2, %%xmm0 \n\t" // x3+h1:x2+h0
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"movdqu %%xmm0, (%2) \n\t" // done
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"movdqu %%xmm0, (%2) \n\t" // done
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:
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: "r" (aa), "r" (bb), "r" (cc)
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: "memory", "cc", "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5" );
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: "memory", "cc", "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5");
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/* Now byte-reverse the outputs */
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for( i = 0; i < 16; i++ )
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for (i = 0; i < 16; i++) {
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c[i] = cc[15 - i];
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}
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return;
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}
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@ -251,32 +251,33 @@ void mbedtls_aesni_gcm_mult( unsigned char c[16],
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/*
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* Compute decryption round keys from encryption round keys
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*/
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void mbedtls_aesni_inverse_key( unsigned char *invkey,
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const unsigned char *fwdkey, int nr )
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void mbedtls_aesni_inverse_key(unsigned char *invkey,
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const unsigned char *fwdkey, int nr)
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{
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unsigned char *ik = invkey;
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const unsigned char *fk = fwdkey + 16 * nr;
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memcpy( ik, fk, 16 );
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memcpy(ik, fk, 16);
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for( fk -= 16, ik += 16; fk > fwdkey; fk -= 16, ik += 16 )
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asm( "movdqu (%0), %%xmm0 \n\t"
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for (fk -= 16, ik += 16; fk > fwdkey; fk -= 16, ik += 16) {
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asm ("movdqu (%0), %%xmm0 \n\t"
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AESIMC xmm0_xmm0 "\n\t"
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"movdqu %%xmm0, (%1) \n\t"
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"movdqu %%xmm0, (%1) \n\t"
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:
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: "r" (fk), "r" (ik)
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: "memory", "xmm0" );
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: "memory", "xmm0");
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}
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memcpy( ik, fk, 16 );
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memcpy(ik, fk, 16);
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}
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/*
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* Key expansion, 128-bit case
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*/
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static void aesni_setkey_enc_128( unsigned char *rk,
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const unsigned char *key )
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static void aesni_setkey_enc_128(unsigned char *rk,
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const unsigned char *key)
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{
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asm( "movdqu (%1), %%xmm0 \n\t" // copy the original key
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asm ("movdqu (%1), %%xmm0 \n\t" // copy the original key
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"movdqu %%xmm0, (%0) \n\t" // as round key 0
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"jmp 2f \n\t" // skip auxiliary routine
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@ -317,16 +318,16 @@ static void aesni_setkey_enc_128( unsigned char *rk,
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AESKEYGENA xmm0_xmm1 ",0x36 \n\tcall 1b \n\t"
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:
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: "r" (rk), "r" (key)
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: "memory", "cc", "0" );
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: "memory", "cc", "0");
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}
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/*
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* Key expansion, 192-bit case
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*/
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static void aesni_setkey_enc_192( unsigned char *rk,
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const unsigned char *key )
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static void aesni_setkey_enc_192(unsigned char *rk,
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const unsigned char *key)
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{
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asm( "movdqu (%1), %%xmm0 \n\t" // copy original round key
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asm ("movdqu (%1), %%xmm0 \n\t" // copy original round key
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"movdqu %%xmm0, (%0) \n\t"
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"add $16, %0 \n\t"
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"movq 16(%1), %%xmm1 \n\t"
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@ -374,16 +375,16 @@ static void aesni_setkey_enc_192( unsigned char *rk,
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:
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: "r" (rk), "r" (key)
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: "memory", "cc", "0" );
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: "memory", "cc", "0");
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}
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/*
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* Key expansion, 256-bit case
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*/
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static void aesni_setkey_enc_256( unsigned char *rk,
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const unsigned char *key )
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static void aesni_setkey_enc_256(unsigned char *rk,
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const unsigned char *key)
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{
|
||||
asm( "movdqu (%1), %%xmm0 \n\t"
|
||||
asm ("movdqu (%1), %%xmm0 \n\t"
|
||||
"movdqu %%xmm0, (%0) \n\t"
|
||||
"add $16, %0 \n\t"
|
||||
"movdqu 16(%1), %%xmm1 \n\t"
|
||||
@ -414,23 +415,23 @@ 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 */
|
||||
AESKEYGENA xmm0_xmm2 ",0x00 \n\t"
|
||||
"pshufd $0xaa, %%xmm2, %%xmm2 \n\t"
|
||||
"pxor %%xmm1, %%xmm2 \n\t"
|
||||
"pslldq $4, %%xmm1 \n\t"
|
||||
"pxor %%xmm1, %%xmm2 \n\t"
|
||||
"pslldq $4, %%xmm1 \n\t"
|
||||
"pxor %%xmm1, %%xmm2 \n\t"
|
||||
"pslldq $4, %%xmm1 \n\t"
|
||||
"pxor %%xmm2, %%xmm1 \n\t"
|
||||
"add $16, %0 \n\t"
|
||||
"movdqu %%xmm1, (%0) \n\t"
|
||||
"ret \n\t"
|
||||
"pshufd $0xaa, %%xmm2, %%xmm2 \n\t"
|
||||
"pxor %%xmm1, %%xmm2 \n\t"
|
||||
"pslldq $4, %%xmm1 \n\t"
|
||||
"pxor %%xmm1, %%xmm2 \n\t"
|
||||
"pslldq $4, %%xmm1 \n\t"
|
||||
"pxor %%xmm1, %%xmm2 \n\t"
|
||||
"pslldq $4, %%xmm1 \n\t"
|
||||
"pxor %%xmm2, %%xmm1 \n\t"
|
||||
"add $16, %0 \n\t"
|
||||
"movdqu %%xmm1, (%0) \n\t"
|
||||
"ret \n\t"
|
||||
|
||||
/*
|
||||
* Main "loop" - Generating one more key than necessary,
|
||||
* see definition of mbedtls_aes_context.buf
|
||||
*/
|
||||
"2: \n\t"
|
||||
"2: \n\t"
|
||||
AESKEYGENA xmm1_xmm2 ",0x01 \n\tcall 1b \n\t"
|
||||
AESKEYGENA xmm1_xmm2 ",0x02 \n\tcall 1b \n\t"
|
||||
AESKEYGENA xmm1_xmm2 ",0x04 \n\tcall 1b \n\t"
|
||||
@ -440,25 +441,24 @@ static void aesni_setkey_enc_256( unsigned char *rk,
|
||||
AESKEYGENA xmm1_xmm2 ",0x40 \n\tcall 1b \n\t"
|
||||
:
|
||||
: "r" (rk), "r" (key)
|
||||
: "memory", "cc", "0" );
|
||||
: "memory", "cc", "0");
|
||||
}
|
||||
|
||||
/*
|
||||
* Key expansion, wrapper
|
||||
*/
|
||||
int mbedtls_aesni_setkey_enc( unsigned char *rk,
|
||||
const unsigned char *key,
|
||||
size_t bits )
|
||||
int mbedtls_aesni_setkey_enc(unsigned char *rk,
|
||||
const unsigned char *key,
|
||||
size_t bits)
|
||||
{
|
||||
switch( bits )
|
||||
{
|
||||
case 128: aesni_setkey_enc_128( rk, key ); break;
|
||||
case 192: aesni_setkey_enc_192( rk, key ); break;
|
||||
case 256: aesni_setkey_enc_256( rk, key ); break;
|
||||
default : return( MBEDTLS_ERR_AES_INVALID_KEY_LENGTH );
|
||||
switch (bits) {
|
||||
case 128: aesni_setkey_enc_128(rk, key); break;
|
||||
case 192: aesni_setkey_enc_192(rk, key); break;
|
||||
case 256: aesni_setkey_enc_256(rk, key); break;
|
||||
default: return MBEDTLS_ERR_AES_INVALID_KEY_LENGTH;
|
||||
}
|
||||
|
||||
return( 0 );
|
||||
return 0;
|
||||
}
|
||||
|
||||
#endif /* MBEDTLS_HAVE_X86_64 */
|
||||
|
||||
Reference in New Issue
Block a user