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Make GCM AES faster

Browse source 
13.22% mbedtls_aesni_gcm_mult
    13.03% mbedtls_gcm_update
     9.85% mbedtls_aesni_crypt_ecb

Overhead improvement (perf record)

    10.97% mbedtls_aesni_gcm_mult
    10.59% mbedtls_aesni_crypt_ecb
     2.26% mbedtls_gcm_update
This commit is contained in:
Justine Tunney 2021-07-06 07:07:18 -07:00
parent f8b9bd2b47
commit e51034bab3
10 changed files with 452 additions and 640 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
third_party/mbedtls/README.cosmo vendored
View file

@ -47,3 +47,7 @@ LOCAL CHANGES
doesn't have large amounts of duplicated generated code.
- Make chacha20 26% faster.
- Make base64 100x faster.
- Make gcm faster.

141
third_party/mbedtls/aesni.c vendored
View file

@ -1,3 +1,4 @@
#include "libc/bits/bits.h"
#include "libc/str/str.h"
#include "third_party/mbedtls/aesni.h"
#include "third_party/mbedtls/common.h"
@ -62,8 +63,18 @@ asm(".include \"libc/disclaimer.inc\"");
#define xmm1_xmm0 "0xC1"
#define xmm1_xmm2 "0xD1"
/*
* AES-NI AES-ECB block en(de)cryption
/**
* \brief Internal AES-NI AES-ECB block encryption and decryption
*
* \note This function is only for internal use by other library
* functions; you must not call it directly.
*
* \param ctx AES context
* \param mode MBEDTLS_AES_ENCRYPT or MBEDTLS_AES_DECRYPT
* \param input 16-byte input block
* \param output 16-byte output block
*
* \return 0 on success (cannot fail)
*/
int mbedtls_aesni_crypt_ecb( mbedtls_aes_context *ctx,
int mode,
@ -107,52 +118,54 @@ int mbedtls_aesni_crypt_ecb( mbedtls_aes_context *ctx,
return( 0 );
}
/*
* GCM multiplication: c = a times b in GF(2^128)
/**
* \brief Internal GCM multiplication: a = a * b in GF(2^128)
* Based on [CLMUL-WP] algorithms 1 (with equation 27) and 5.
*
* \note This function is intended for internal use.
*
* \param a First operand (big endian)
* \param b Second operand (host endian)
*
* \note Both operands and result are bit strings interpreted as
* elements of GF(2^128) as per the GCM spec.
*/
void mbedtls_aesni_gcm_mult( unsigned char c[16],
const unsigned char a[16],
const unsigned char b[16] )
void mbedtls_aesni_gcm_mult( unsigned char a[16], const uint64_t b[2] )
{
unsigned char aa[16], bb[16], cc[16];
size_t i;
uint64_t aa _Vector_size(16) forcealign(16);
uint64_t bb _Vector_size(16) forcealign(16);
/* The inputs are in big-endian order, so byte-reverse them */
for( i = 0; i < 16; i++ )
{
aa[i] = a[15 - i];
bb[i] = b[15 - i];
}
aa[0] = READ64BE(a+8);
aa[1] = READ64BE(a+0);
memcpy(&bb, b, 16);
asm( "movdqu (%0), %%xmm0 \n\t" // a1:a0
"movdqu (%1), %%xmm1 \n\t" // b1:b0
/*
asm( /*
* Caryless multiplication xmm2:xmm1 = xmm0 * xmm1
* using [CLMUL-WP] algorithm 1 (p. 13).
*/
"movdqa %%xmm1, %%xmm2 \n\t" // copy of b1:b0
"movdqa %%xmm1, %%xmm3 \n\t" // same
"movdqa %%xmm1, %%xmm4 \n\t" // same
PCLMULQDQ xmm0_xmm1 ",0x00 \n\t" // a0*b0 = c1:c0
PCLMULQDQ xmm0_xmm2 ",0x11 \n\t" // a1*b1 = d1:d0
PCLMULQDQ xmm0_xmm3 ",0x10 \n\t" // a0*b1 = e1:e0
PCLMULQDQ xmm0_xmm4 ",0x01 \n\t" // a1*b0 = f1:f0
"movdqa %1, %%xmm2 \n\t" // copy of b1:b0
"movdqa %1, %%xmm3 \n\t" // same
"movdqa %1, %%xmm4 \n\t" // same
"pclmullqlqdq %0,%1 \n\t" // a0*b0 = c1:c0
"pclmulhqhqdq %0,%%xmm2 \n\t" // a1*b1 = d1:d0
"pclmullqhqdq %0,%%xmm3 \n\t" // a0*b1 = e1:e0
"pclmulhqlqdq %0,%%xmm4 \n\t" // a1*b0 = f1:f0
"pxor %%xmm3, %%xmm4 \n\t" // e1+f1:e0+f0
"movdqa %%xmm4, %%xmm3 \n\t" // same
"psrldq $8, %%xmm4 \n\t" // 0:e1+f1
"pslldq $8, %%xmm3 \n\t" // e0+f0:0
"pxor %%xmm4, %%xmm2 \n\t" // d1:d0+e1+f1
"pxor %%xmm3, %%xmm1 \n\t" // c1+e0+f1:c0
"pxor %%xmm3, %1 \n\t" // c1+e0+f1:c0
/*
* Now shift the result one bit to the left,
* taking advantage of [CLMUL-WP] eq 27 (p. 20)
*/
"movdqa %%xmm1, %%xmm3 \n\t" // r1:r0
"movdqa %1, %%xmm3 \n\t" // r1:r0
"movdqa %%xmm2, %%xmm4 \n\t" // r3:r2
"psllq $1, %%xmm1 \n\t" // r1<<1:r0<<1
"psllq $1, %1 \n\t" // r1<<1:r0<<1
"psllq $1, %%xmm2 \n\t" // r3<<1:r2<<1
"psrlq $63, %%xmm3 \n\t" // r1>>63:r0>>63
"psrlq $63, %%xmm4 \n\t" // r3>>63:r2>>63
@ -160,7 +173,7 @@ void mbedtls_aesni_gcm_mult( unsigned char c[16],
"pslldq $8, %%xmm3 \n\t" // r0>>63:0
"pslldq $8, %%xmm4 \n\t" // r2>>63:0
"psrldq $8, %%xmm5 \n\t" // 0:r1>>63
"por %%xmm3, %%xmm1 \n\t" // r1<<1|r0>>63:r0<<1
"por %%xmm3, %1 \n\t" // r1<<1|r0>>63:r0<<1
"por %%xmm4, %%xmm2 \n\t" // r3<<1|r2>>62:r2<<1
"por %%xmm5, %%xmm2 \n\t" // r3<<1|r2>>62:r2<<1|r1>>63
@ -170,9 +183,9 @@ void mbedtls_aesni_gcm_mult( unsigned char c[16],
* Currently xmm2:xmm1 holds x3:x2:x1:x0 (already shifted).
*/
/* Step 2 (1) */
"movdqa %%xmm1, %%xmm3 \n\t" // x1:x0
"movdqa %%xmm1, %%xmm4 \n\t" // same
"movdqa %%xmm1, %%xmm5 \n\t" // same
"movdqa %1, %%xmm3 \n\t" // x1:x0
"movdqa %1, %%xmm4 \n\t" // same
"movdqa %1, %%xmm5 \n\t" // same
"psllq $63, %%xmm3 \n\t" // x1<<63:x0<<63 = stuff:a
"psllq $62, %%xmm4 \n\t" // x1<<62:x0<<62 = stuff:b
"psllq $57, %%xmm5 \n\t" // x1<<57:x0<<57 = stuff:c
@ -181,46 +194,50 @@ void mbedtls_aesni_gcm_mult( unsigned char c[16],
"pxor %%xmm4, %%xmm3 \n\t" // stuff:a+b
"pxor %%xmm5, %%xmm3 \n\t" // stuff:a+b+c
"pslldq $8, %%xmm3 \n\t" // a+b+c:0
"pxor %%xmm3, %%xmm1 \n\t" // x1+a+b+c:x0 = d:x0
"pxor %%xmm3, %1 \n\t" // x1+a+b+c:x0 = d:x0
/* Steps 3 and 4 */
"movdqa %%xmm1,%%xmm0 \n\t" // d:x0
"movdqa %%xmm1,%%xmm4 \n\t" // same
"movdqa %%xmm1,%%xmm5 \n\t" // same
"psrlq $1, %%xmm0 \n\t" // e1:x0>>1 = e1:e0'
"movdqa %1,%0 \n\t" // d:x0
"movdqa %1,%%xmm4 \n\t" // same
"movdqa %1,%%xmm5 \n\t" // same
"psrlq $1, %0 \n\t" // e1:x0>>1 = e1:e0'
"psrlq $2, %%xmm4 \n\t" // f1:x0>>2 = f1:f0'
"psrlq $7, %%xmm5 \n\t" // g1:x0>>7 = g1:g0'
"pxor %%xmm4, %%xmm0 \n\t" // e1+f1:e0'+f0'
"pxor %%xmm5, %%xmm0 \n\t" // e1+f1+g1:e0'+f0'+g0'
"pxor %%xmm4, %0 \n\t" // e1+f1:e0'+f0'
"pxor %%xmm5, %0 \n\t" // e1+f1+g1:e0'+f0'+g0'
// e0'+f0'+g0' is almost e0+f0+g0, ex\tcept for some missing
// bits carried from d. Now get those\t bits back in.
"movdqa %%xmm1,%%xmm3 \n\t" // d:x0
"movdqa %%xmm1,%%xmm4 \n\t" // same
"movdqa %%xmm1,%%xmm5 \n\t" // same
"movdqa %1,%%xmm3 \n\t" // d:x0
"movdqa %1,%%xmm4 \n\t" // same
"movdqa %1,%%xmm5 \n\t" // same
"psllq $63, %%xmm3 \n\t" // d<<63:stuff
"psllq $62, %%xmm4 \n\t" // d<<62:stuff
"psllq $57, %%xmm5 \n\t" // d<<57:stuff
"pxor %%xmm4, %%xmm3 \n\t" // d<<63+d<<62:stuff
"pxor %%xmm5, %%xmm3 \n\t" // missing bits of d:stuff
"psrldq $8, %%xmm3 \n\t" // 0:missing bits of d
"pxor %%xmm3, %%xmm0 \n\t" // e1+f1+g1:e0+f0+g0
"pxor %%xmm1, %%xmm0 \n\t" // h1:h0
"pxor %%xmm2, %%xmm0 \n\t" // x3+h1:x2+h0
"movdqu %%xmm0, (%2) \n\t" // done
:
: "r" (aa), "r" (bb), "r" (cc)
: "memory", "cc", "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5" );
"pxor %%xmm3, %0 \n\t" // e1+f1+g1:e0+f0+g0
"pxor %1, %0 \n\t" // h1:h0
"pxor %%xmm2, %0 \n\t" // x3+h1:x2+h0
: "+x" (aa)
: "x" (bb)
: "xmm2", "xmm3", "xmm4", "xmm5" );
/* Now byte-reverse the outputs */
for( i = 0; i < 16; i++ )
c[i] = cc[15 - i];
return;
WRITE64BE(a+0, aa[1]);
WRITE64BE(a+8, aa[0]);
}
/*
* Compute decryption round keys from encryption round keys
/**
* \brief Internal round key inversion. This function computes
* decryption round keys from the encryption round keys.
*
* \note This function is only for internal use by other library
* functions; you must not call it directly.
*
* \param invkey Round keys for the equivalent inverse cipher
* \param fwdkey Original round keys (for encryption)
* \param nr Number of rounds (that is, number of round keys minus one)
*/
void mbedtls_aesni_inverse_key( unsigned char *invkey,
const unsigned char *fwdkey, int nr )
@ -414,8 +431,17 @@ static void aesni_setkey_enc_256( unsigned char *rk,
: "memory", "cc", "0" );
}
/*
* Key expansion, wrapper
/**
* \brief Internal key expansion for encryption
*
* \note This function is only for internal use by other library
* functions; you must not call it directly.
*
* \param rk Destination buffer where the round keys are written
* \param key Encryption key
* \param bits Key size in bits (must be 128, 192 or 256)
*
* \return 0 if successful, or MBEDTLS_ERR_AES_INVALID_KEY_LENGTH
*/
int mbedtls_aesni_setkey_enc( unsigned char *rk,
const unsigned char *key,
@ -428,7 +454,6 @@ int mbedtls_aesni_setkey_enc( unsigned char *rk,
case 256: aesni_setkey_enc_256( rk, key ); break;
default : return( MBEDTLS_ERR_AES_INVALID_KEY_LENGTH );
}
return( 0 );
}

97
third_party/mbedtls/aesni.h vendored
View file

@ -1,96 +1,17 @@
#ifndef MBEDTLS_AESNI_H
#define MBEDTLS_AESNI_H
#ifndef MBEDTLS_AESNI_H_
#define MBEDTLS_AESNI_H_
#include "third_party/mbedtls/aes.h"
#include "third_party/mbedtls/config.h"
COSMOPOLITAN_C_START_
/* clang-format off */
#define MBEDTLS_AESNI_AES 0x02000000u
#define MBEDTLS_AESNI_CLMUL 0x00000002u
#ifdef __cplusplus
extern "C" {
#endif
int mbedtls_aesni_crypt_ecb( mbedtls_aes_context *, int, const unsigned char[16], unsigned char[16] );
void mbedtls_aesni_gcm_mult( unsigned char[16], const uint64_t[2] );
void mbedtls_aesni_inverse_key( unsigned char *, const unsigned char *, int );
int mbedtls_aesni_setkey_enc( unsigned char *, const unsigned char *, size_t );
/**
* \brief Internal function to detect the AES-NI feature in CPUs.
*
* \note This function is only for internal use by other library
* functions; you must not call it directly.
*
* \param what The feature to detect
* (MBEDTLS_AESNI_AES or MBEDTLS_AESNI_CLMUL)
*
* \return 1 if CPU has support for the feature, 0 otherwise
*/
int mbedtls_aesni_has_support( unsigned int what );
/**
* \brief Internal AES-NI AES-ECB block encryption and decryption
*
* \note This function is only for internal use by other library
* functions; you must not call it directly.
*
* \param ctx AES context
* \param mode MBEDTLS_AES_ENCRYPT or MBEDTLS_AES_DECRYPT
* \param input 16-byte input block
* \param output 16-byte output block
*
* \return 0 on success (cannot fail)
*/
int mbedtls_aesni_crypt_ecb( mbedtls_aes_context *ctx,
int mode,
const unsigned char input[16],
unsigned char output[16] );
/**
* \brief Internal GCM multiplication: c = a * b in GF(2^128)
*
* \note This function is only for internal use by other library
* functions; you must not call it directly.
*
* \param c Result
* \param a First operand
* \param b Second operand
*
* \note Both operands and result are bit strings interpreted as
* elements of GF(2^128) as per the GCM spec.
*/
void mbedtls_aesni_gcm_mult( unsigned char c[16],
const unsigned char a[16],
const unsigned char b[16] );
/**
* \brief Internal round key inversion. This function computes
* decryption round keys from the encryption round keys.
*
* \note This function is only for internal use by other library
* functions; you must not call it directly.
*
* \param invkey Round keys for the equivalent inverse cipher
* \param fwdkey Original round keys (for encryption)
* \param nr Number of rounds (that is, number of round keys minus one)
*/
void mbedtls_aesni_inverse_key( unsigned char *invkey,
const unsigned char *fwdkey,
int nr );
/**
* \brief Internal key expansion for encryption
*
* \note This function is only for internal use by other library
* functions; you must not call it directly.
*
* \param rk Destination buffer where the round keys are written
* \param key Encryption key
* \param bits Key size in bits (must be 128, 192 or 256)
*
* \return 0 if successful, or MBEDTLS_ERR_AES_INVALID_KEY_LENGTH
*/
int mbedtls_aesni_setkey_enc( unsigned char *rk,
const unsigned char *key,
size_t bits );
#ifdef __cplusplus
}
#endif
#endif /* MBEDTLS_AESNI_H */
COSMOPOLITAN_C_END_
#endif /* MBEDTLS_AESNI_H_ */

6
third_party/mbedtls/base64.c vendored
View file

@ -93,18 +93,18 @@ forceinline unsigned char mbedtls_base64_eq( size_t in_a, size_t in_b )
/*
* Constant flow lookup into table.
*/
static unsigned char mbedtls_base64_table_lookup( const unsigned char * const table,
static inline unsigned char mbedtls_base64_table_lookup( const unsigned char * const table,
const size_t table_size,
const size_t table_index )
{
return 0 <= table_index && table_index < table_size ? table[table_index] : 127;
/* come on really? */
size_t i;
unsigned char result = 0;
for( i = 0; i < table_size; ++i )
{
mbedtls_base64_cond_assign_uchar( &result, &table[i], mbedtls_base64_eq( i, table_index ) );
}
return result;
}

10
third_party/mbedtls/cipher.c vendored
View file

@ -481,16 +481,6 @@ int mbedtls_cipher_update( mbedtls_cipher_context_t *ctx, const unsigned char *i
if( ctx->cipher_info == NULL )
return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
#if defined(MBEDTLS_USE_PSA_CRYPTO)
if( ctx->psa_enabled == 1 )
{
/* While PSA Crypto has an API for multipart
* operations, we currently don't make it
* accessible through the cipher layer. */
return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
}
#endif /* MBEDTLS_USE_PSA_CRYPTO */
*olen = 0;
block_size = mbedtls_cipher_get_block_size( ctx );
if ( 0 == block_size )

2
third_party/mbedtls/error.c vendored
View file

@ -551,8 +551,6 @@ const char * mbedtls_low_level_strerr( int error_code )
#if defined(MBEDTLS_GCM_C)
case -(MBEDTLS_ERR_GCM_AUTH_FAILED):
return( "GCM - Authenticated decryption failed" );
case -(MBEDTLS_ERR_GCM_HW_ACCEL_FAILED):
return( "GCM - GCM hardware accelerator failed" );
case -(MBEDTLS_ERR_GCM_BAD_INPUT):
return( "GCM - Bad input parameters to function" );
#endif /* MBEDTLS_GCM_C */

466
third_party/mbedtls/gcm.c vendored
View file

@ -1,4 +1,7 @@
#include "libc/bits/bits.h"
#include "libc/bits/likely.h"
#include "libc/nexgen32e/x86feature.h"
#include "libc/runtime/runtime.h"
#include "libc/str/str.h"
#include "third_party/mbedtls/aes.h"
#include "third_party/mbedtls/aesni.h"
@ -52,8 +55,16 @@ asm(".include \"libc/disclaimer.inc\"");
#define GCM_VALIDATE( cond ) \
MBEDTLS_INTERNAL_VALIDATE( cond )
/*
* Initialize a context
/**
* \brief This function initializes the specified GCM context,
* to make references valid, and prepares the context
* for mbedtls_gcm_setkey() or mbedtls_gcm_free().
*
* The function does not bind the GCM context to a particular
* cipher, nor set the key. For this purpose, use
* mbedtls_gcm_setkey().
*
* \param ctx The GCM context to initialize. This must not be \c NULL.
*/
void mbedtls_gcm_init( mbedtls_gcm_context *ctx )
{
@ -76,58 +87,60 @@ static int gcm_gen_table( mbedtls_gcm_context *ctx )
uint64_t vl, vh;
unsigned char h[16];
size_t olen = 0;
memset( h, 0, 16 );
if( ( ret = mbedtls_cipher_update( &ctx->cipher_ctx, h, 16, h, &olen ) ) != 0 )
return( ret );
/* pack h as two 64-bits ints, big-endian */
GET_UINT32_BE( hi, h, 0 );
GET_UINT32_BE( lo, h, 4 );
vh = (uint64_t) hi << 32 | lo;
GET_UINT32_BE( hi, h, 8 );
GET_UINT32_BE( lo, h, 12 );
vl = (uint64_t) hi << 32 | lo;
/* 8 = 1000 corresponds to 1 in GF(2^128) */
ctx->HL[8] = vl;
ctx->HH[8] = vh;
vh = READ64BE( h + 0 );
vl = READ64BE( h + 8 );
#if defined(MBEDTLS_AESNI_C) && defined(MBEDTLS_HAVE_X86_64)
/* With CLMUL support, we need only h, not the rest of the table */
if (X86_HAVE(AES) && X86_HAVE(PCLMUL)) return 0;
if (X86_HAVE(AES) && X86_HAVE(PCLMUL)) {
ctx->H8[0] = vl;
ctx->H8[1] = vh;
return 0;
}
#endif
/* 0 corresponds to 0 in GF(2^128) */
ctx->HH[0] = 0;
ctx->HL[0] = 0;
for( i = 4; i > 0; i >>= 1 )
{
/* 8 = 1000 corresponds to 1 in GF(2^128) */
ctx->HL[8] = vl;
ctx->HH[8] = vh;
for( i = 4; i > 0; i >>= 1 ) {
uint32_t T = ( vl & 1 ) * 0xe1000000U;
vl = ( vh << 63 ) | ( vl >> 1 );
vh = ( vh >> 1 ) ^ ( (uint64_t) T << 32);
ctx->HL[i] = vl;
ctx->HH[i] = vh;
}
for( i = 2; i <= 8; i *= 2 )
{
for( i = 2; i <= 8; i *= 2 ) {
uint64_t *HiL = ctx->HL + i, *HiH = ctx->HH + i;
vh = *HiH;
vl = *HiL;
for( j = 1; j < i; j++ )
{
for( j = 1; j < i; j++ ) {
HiH[j] = vh ^ ctx->HH[j];
HiL[j] = vl ^ ctx->HL[j];
}
}
return( 0 );
}
/**
* \brief This function associates a GCM context with a
* cipher algorithm and a key.
*
* \param ctx The GCM context. This must be initialized.
* \param cipher The 128-bit block cipher to use.
* \param key The encryption key. This must be a readable buffer of at
* least \p keybits bits.
* \param keybits The key size in bits. Valid options are:
* <ul><li>128 bits</li>
* <li>192 bits</li>
* <li>256 bits</li></ul>
*
* \return \c 0 on success.
* \return A cipher-specific error code on failure.
*/
int mbedtls_gcm_setkey( mbedtls_gcm_context *ctx,
mbedtls_cipher_id_t cipher,
const unsigned char *key,
@ -135,33 +148,24 @@ int mbedtls_gcm_setkey( mbedtls_gcm_context *ctx,
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
const mbedtls_cipher_info_t *cipher_info;
GCM_VALIDATE_RET( ctx != NULL );
GCM_VALIDATE_RET( key != NULL );
GCM_VALIDATE_RET( keybits == 128 || keybits == 192 || keybits == 256 );
cipher_info = mbedtls_cipher_info_from_values( cipher, keybits,
MBEDTLS_MODE_ECB );
if( cipher_info == NULL )
return( MBEDTLS_ERR_GCM_BAD_INPUT );
if( cipher_info->block_size != 16 )
return( MBEDTLS_ERR_GCM_BAD_INPUT );
mbedtls_cipher_free( &ctx->cipher_ctx );
if( ( ret = mbedtls_cipher_setup( &ctx->cipher_ctx, cipher_info ) ) != 0 )
return( ret );
if( ( ret = mbedtls_cipher_setkey( &ctx->cipher_ctx, key, keybits,
MBEDTLS_ENCRYPT ) ) != 0 )
{
MBEDTLS_ENCRYPT ) ) != 0 ) {
return( ret );
}
if( ( ret = gcm_gen_table( ctx ) ) != 0 )
return( ret );
return( 0 );
}
@ -182,48 +186,31 @@ static const uint64_t last4[16] =
* Sets output to x times H using the precomputed tables.
* x and output are seen as elements of GF(2^128) as in [MGV].
*/
static void gcm_mult( mbedtls_gcm_context *ctx, const unsigned char x[16],
unsigned char output[16] )
static void gcm_mult( mbedtls_gcm_context *ctx, unsigned char x[16] )
{
int i = 0;
unsigned char lo, hi, rem;
int i;
uint64_t zh, zl;
unsigned char lo, hi, rem;
#if defined(MBEDTLS_AESNI_C) && defined(MBEDTLS_HAVE_X86_64)
if (X86_HAVE(AES) && X86_HAVE(PCLMUL)) {
unsigned char h[16];
PUT_UINT32_BE( ctx->HH[8] >> 32, h, 0 );
PUT_UINT32_BE( ctx->HH[8], h, 4 );
PUT_UINT32_BE( ctx->HL[8] >> 32, h, 8 );
PUT_UINT32_BE( ctx->HL[8], h, 12 );
mbedtls_aesni_gcm_mult( output, x, h );
if (LIKELY(X86_HAVE(AES) && X86_HAVE(PCLMUL))) {
mbedtls_aesni_gcm_mult( x, ctx->H8 );
return;
}
#endif /* MBEDTLS_AESNI_C && MBEDTLS_HAVE_X86_64 */
lo = x[15] & 0xf;
zh = ctx->HH[lo];
zl = ctx->HL[lo];
for( i = 15; i >= 0; i-- )
{
for( i = 15; i >= 0; i-- ) {
lo = x[i] & 0xf;
hi = ( x[i] >> 4 ) & 0xf;
if( i != 15 )
{
if( i != 15 ) {
rem = (unsigned char) zl & 0xf;
zl = ( zh << 60 ) | ( zl >> 4 );
zh = ( zh >> 4 );
zh ^= (uint64_t) last4[rem] << 48;
zh ^= ctx->HH[lo];
zl ^= ctx->HL[lo];
}
rem = (unsigned char) zl & 0xf;
zl = ( zh << 60 ) | ( zl >> 4 );
zh = ( zh >> 4 );
@ -231,13 +218,27 @@ static void gcm_mult( mbedtls_gcm_context *ctx, const unsigned char x[16],
zh ^= ctx->HH[hi];
zl ^= ctx->HL[hi];
}
PUT_UINT32_BE( zh >> 32, output, 0 );
PUT_UINT32_BE( zh, output, 4 );
PUT_UINT32_BE( zl >> 32, output, 8 );
PUT_UINT32_BE( zl, output, 12 );
PUT_UINT64_BE( zh, x, 0 );
PUT_UINT64_BE( zl, x, 8 );
}
/**
* \brief This function starts a GCM encryption or decryption
* operation.
*
* \param ctx The GCM context. This must be initialized.
* \param mode The operation to perform: #MBEDTLS_GCM_ENCRYPT or
* #MBEDTLS_GCM_DECRYPT.
* \param iv The initialization vector. This must be a readable buffer of
* at least \p iv_len Bytes.
* \param iv_len The length of the IV.
* \param add The buffer holding the additional data, or \c NULL
* if \p add_len is \c 0.
* \param add_len The length of the additional data. If \c 0,
* \p add may be \c NULL.
*
* \return \c 0 on success.
*/
int mbedtls_gcm_starts( mbedtls_gcm_context *ctx,
int mode,
const unsigned char *iv,
@ -245,190 +246,277 @@ int mbedtls_gcm_starts( mbedtls_gcm_context *ctx,
const unsigned char *add,
size_t add_len )
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
unsigned char work_buf[16];
size_t i;
const unsigned char *p;
size_t use_len, olen = 0;
unsigned char work_buf[16];
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
GCM_VALIDATE_RET( ctx != NULL );
GCM_VALIDATE_RET( iv != NULL );
GCM_VALIDATE_RET( add_len == 0 || add != NULL );
/* IV and AD are limited to 2^64 bits, so 2^61 bytes */
/* IV is not allowed to be zero length */
if( iv_len == 0 ||
( (uint64_t) iv_len ) >> 61 != 0 ||
( (uint64_t) add_len ) >> 61 != 0 )
{
( (uint64_t) add_len ) >> 61 != 0 ) {
return( MBEDTLS_ERR_GCM_BAD_INPUT );
}
memset( ctx->y, 0x00, sizeof(ctx->y) );
memset( ctx->buf, 0x00, sizeof(ctx->buf) );
ctx->mode = mode;
ctx->len = 0;
ctx->add_len = 0;
if( iv_len == 12 )
{
if( iv_len == 12 ) {
memcpy( ctx->y, iv, iv_len );
ctx->y[15] = 1;
}
else
{
} else {
memset( work_buf, 0x00, 16 );
PUT_UINT32_BE( iv_len * 8, work_buf, 12 );
p = iv;
while( iv_len > 0 )
{
while( iv_len > 0 ) {
use_len = ( iv_len < 16 ) ? iv_len : 16;
for( i = 0; i < use_len; i++ )
ctx->y[i] ^= p[i];
gcm_mult( ctx, ctx->y, ctx->y );
gcm_mult( ctx, ctx->y );
iv_len -= use_len;
p += use_len;
}
for( i = 0; i < 16; i++ )
ctx->y[i] ^= work_buf[i];
gcm_mult( ctx, ctx->y, ctx->y );
gcm_mult( ctx, ctx->y );
}
if( ( ret = mbedtls_cipher_update( &ctx->cipher_ctx, ctx->y, 16,
ctx->base_ectr, &olen ) ) != 0 )
{
ctx->base_ectr, &olen ) ) != 0 ) {
return( ret );
}
ctx->add_len = add_len;
p = add;
while( add_len > 0 )
{
while( add_len > 0 ) {
use_len = ( add_len < 16 ) ? add_len : 16;
for( i = 0; i < use_len; i++ )
ctx->buf[i] ^= p[i];
gcm_mult( ctx, ctx->buf, ctx->buf );
gcm_mult( ctx, ctx->buf );
add_len -= use_len;
p += use_len;
}
return( 0 );
}
/**
* \brief This function feeds an input buffer into an ongoing GCM
* encryption or decryption operation.
*
* The function expects input to be a multiple of 16
* Bytes. Only the last call before calling
* mbedtls_gcm_finish() can be less than 16 Bytes.
*
* \note For decryption, the output buffer cannot be the same as
* input buffer. If the buffers overlap, the output buffer
* must trail at least 8 Bytes behind the input buffer.
*
* \param ctx The GCM context. This must be initialized.
* \param length The length of the input data. This must be a multiple of
* 16 except in the last call before mbedtls_gcm_finish().
* \param input The buffer holding the input data. If \p length is greater
* than zero, this must be a readable buffer of at least that
* size in Bytes.
* \param output The buffer for holding the output data. If \p length is
* greater than zero, this must be a writable buffer of at
* least that size in Bytes.
*
* \return \c 0 on success.
* \return #MBEDTLS_ERR_GCM_BAD_INPUT on failure.
*/
int mbedtls_gcm_update( mbedtls_gcm_context *ctx,
size_t length,
const unsigned char *input,
unsigned char *output )
{
size_t i, j;
uint64_t a, b;
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
unsigned char ectr[16];
size_t i;
const unsigned char *p;
unsigned char *out_p = output;
size_t use_len, olen = 0;
unsigned char *q, *out_p = output;
size_t olen = 0;
GCM_VALIDATE_RET( ctx != NULL );
GCM_VALIDATE_RET( length == 0 || input != NULL );
GCM_VALIDATE_RET( length == 0 || output != NULL );
if( output > input && (size_t) ( output - input ) < length )
return( MBEDTLS_ERR_GCM_BAD_INPUT );
/* Total length is restricted to 2^39 - 256 bits, ie 2^36 - 2^5 bytes
* Also check for possible overflow */
if( ctx->len + length < ctx->len ||
(uint64_t) ctx->len + length > 0xFFFFFFFE0ull )
{
(uint64_t) ctx->len + length > 0xFFFFFFFE0ull ) {
return( MBEDTLS_ERR_GCM_BAD_INPUT );
}
ctx->len += length;
p = input;
while( length > 0 )
{
use_len = ( length < 16 ) ? length : 16;
q = ctx->buf;
for( j = 0; j + 16 <= length; j += 16 ){
for( i = 16; i > 12; i-- )
if( ++ctx->y[i - 1] != 0 )
break;
if( ( ret = mbedtls_cipher_update( &ctx->cipher_ctx, ctx->y, 16, ectr,
&olen ) ) != 0 )
{
if( !( ret = mbedtls_cipher_update( &ctx->cipher_ctx, ctx->y, 16,
ectr, &olen ) ) ) {
if( ctx->mode == MBEDTLS_GCM_DECRYPT ) {
__builtin_memcpy(&a, p+j, 8);
__builtin_memcpy(&b, q, 8);
b ^= a;
__builtin_memcpy(q, &b, 8);
__builtin_memcpy(&b, ectr, 8);
b ^= a;
__builtin_memcpy(out_p+j, &b, 8);
__builtin_memcpy(&a, p+j+8, 8);
__builtin_memcpy(&b, q+8, 8);
b ^= a;
__builtin_memcpy(q+8, &b, 8);
__builtin_memcpy(&b, ectr+8, 8);
b ^= a;
__builtin_memcpy(out_p+j+8, &b, 8);
/* for( i = 0; i < 16; i++ ) ctx->buf[i] ^= p[i]; */
/* for( i = 0; i < 16; i++ ) out_p[i] = ectr[i] ^ p[i]; */
} else {
__builtin_memcpy(&a, ectr, 8);
__builtin_memcpy(&b, p+j, 8);
b ^= a;
__builtin_memcpy(out_p+j, &b, 8);
__builtin_memcpy(&a, q, 8);
b ^= a;
__builtin_memcpy(q, &b, 8);
__builtin_memcpy(&a, ectr+8, 8);
__builtin_memcpy(&b, p+j+8, 8);
b ^= a;
__builtin_memcpy(out_p+j+8, &b, 8);
__builtin_memcpy(&a, q+8, 8);
b ^= a;
__builtin_memcpy(q+8, &b, 8);
/* for( i = 0; i < 16; i++ ) out_p[i] = ectr[i] ^ p[i]; */
/* for( i = 0; i < 16; i++ ) ctx->buf[i] ^= out_p[i]; */
}
gcm_mult( ctx, q );
} else {
return( ret );
}
for( i = 0; i < use_len; i++ )
{
if( ctx->mode == MBEDTLS_GCM_DECRYPT )
ctx->buf[i] ^= p[i];
}
length -= j;
out_p += j;
p += j;
if( length ) {
for( i = 16; i > 12; i-- )
if( ++ctx->y[i - 1] != 0 )
break;
if( !( ret = mbedtls_cipher_update( &ctx->cipher_ctx, ctx->y, 16, ectr,
&olen ) ) ) {
if( ctx->mode == MBEDTLS_GCM_DECRYPT ) {
for( i = 0; i < length; i++ ){
q[i] ^= p[i];
out_p[i] = ectr[i] ^ p[i];
if( ctx->mode == MBEDTLS_GCM_ENCRYPT )
ctx->buf[i] ^= out_p[i];
}
gcm_mult( ctx, ctx->buf, ctx->buf );
length -= use_len;
p += use_len;
out_p += use_len;
} else {
for( i = 0; i < length; i++ ){
out_p[i] = ectr[i] ^ p[i];
q[i] ^= out_p[i];
}
}
gcm_mult( ctx, q );
} else {
return( ret );
}
}
return( 0 );
}
/**
* \brief This function finishes the GCM operation and generates
* the authentication tag.
*
* It wraps up the GCM stream, and generates the
* tag. The tag can have a maximum length of 16 Bytes.
*
* \param ctx The GCM context. This must be initialized.
* \param tag The buffer for holding the tag. This must be a writable
* buffer of at least \p tag_len Bytes.
* \param tag_len The length of the tag to generate. This must be at least
* four.
*
* \return \c 0 on success.
* \return #MBEDTLS_ERR_GCM_BAD_INPUT on failure.
*/
int mbedtls_gcm_finish( mbedtls_gcm_context *ctx,
unsigned char *tag,
size_t tag_len )
{
unsigned char work_buf[16];
size_t i;
uint64_t orig_len;
uint64_t orig_add_len;
GCM_VALIDATE_RET( ctx != NULL );
GCM_VALIDATE_RET( tag != NULL );
orig_len = ctx->len * 8;
orig_add_len = ctx->add_len * 8;
if( tag_len > 16 || tag_len < 4 )
return( MBEDTLS_ERR_GCM_BAD_INPUT );
memcpy( tag, ctx->base_ectr, tag_len );
if( orig_len || orig_add_len )
{
memset( work_buf, 0x00, 16 );
PUT_UINT32_BE( ( orig_add_len >> 32 ), work_buf, 0 );
PUT_UINT32_BE( ( orig_add_len ), work_buf, 4 );
PUT_UINT32_BE( ( orig_len >> 32 ), work_buf, 8 );
PUT_UINT32_BE( ( orig_len ), work_buf, 12 );
for( i = 0; i < 16; i++ )
ctx->buf[i] ^= work_buf[i];
gcm_mult( ctx, ctx->buf, ctx->buf );
for( i = 0; i < tag_len; i++ )
tag[i] ^= ctx->buf[i];
if( orig_len || orig_add_len ) {
Write64be( ctx->buf + 0, READ64BE( ctx->buf + 0 ) ^ orig_add_len );
Write64be( ctx->buf + 8, READ64BE( ctx->buf + 8 ) ^ orig_len );
gcm_mult( ctx, ctx->buf );
for( i = 0; i < tag_len; i++ ) tag[i] ^= ctx->buf[i];
}
return( 0 );
}
/**
* \brief This function performs GCM encryption or decryption of a buffer.
*
* \note For encryption, the output buffer can be the same as the
* input buffer. For decryption, the output buffer cannot be
* the same as input buffer. If the buffers overlap, the output
* buffer must trail at least 8 Bytes behind the input buffer.
*
* \warning When this function performs a decryption, it outputs the
* authentication tag and does not verify that the data is
* authentic. You should use this function to perform encryption
* only. For decryption, use mbedtls_gcm_auth_decrypt() instead.
*
* \param ctx The GCM context to use for encryption or decryption. This
* must be initialized.
* \param mode The operation to perform:
* - #MBEDTLS_GCM_ENCRYPT to perform authenticated encryption.
* The ciphertext is written to \p output and the
* authentication tag is written to \p tag.
* - #MBEDTLS_GCM_DECRYPT to perform decryption.
* The plaintext is written to \p output and the
* authentication tag is written to \p tag.
* Note that this mode is not recommended, because it does
* not verify the authenticity of the data. For this reason,
* you should use mbedtls_gcm_auth_decrypt() instead of
* calling this function in decryption mode.
* \param length The length of the input data, which is equal to the length
* of the output data.
* \param iv The initialization vector. This must be a readable buffer of
* at least \p iv_len Bytes.
* \param iv_len The length of the IV.
* \param add The buffer holding the additional data. This must be of at
* least that size in Bytes.
* \param add_len The length of the additional data.
* \param input The buffer holding the input data. If \p length is greater
* than zero, this must be a readable buffer of at least that
* size in Bytes.
* \param output The buffer for holding the output data. If \p length is greater
* than zero, this must be a writable buffer of at least that
* size in Bytes.
* \param tag_len The length of the tag to generate.
* \param tag The buffer for holding the tag. This must be a writable
* buffer of at least \p tag_len Bytes.
*
* \return \c 0 if the encryption or decryption was performed
* successfully. Note that in #MBEDTLS_GCM_DECRYPT mode,
* this does not indicate that the data is authentic.
* \return #MBEDTLS_ERR_GCM_BAD_INPUT if the lengths or pointers are
* not valid or a cipher-specific error code if the encryption
* or decryption failed.
*/
int mbedtls_gcm_crypt_and_tag( mbedtls_gcm_context *ctx,
int mode,
size_t length,
@ -442,26 +530,54 @@ int mbedtls_gcm_crypt_and_tag( mbedtls_gcm_context *ctx,
unsigned char *tag )
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
GCM_VALIDATE_RET( ctx != NULL );
GCM_VALIDATE_RET( iv != NULL );
GCM_VALIDATE_RET( add_len == 0 || add != NULL );
GCM_VALIDATE_RET( length == 0 || input != NULL );
GCM_VALIDATE_RET( length == 0 || output != NULL );
GCM_VALIDATE_RET( tag != NULL );
if( ( ret = mbedtls_gcm_starts( ctx, mode, iv, iv_len, add, add_len ) ) != 0 )
return( ret );
if( ( ret = mbedtls_gcm_update( ctx, length, input, output ) ) != 0 )
return( ret );
if( ( ret = mbedtls_gcm_finish( ctx, tag, tag_len ) ) != 0 )
return( ret );
return( 0 );
}
/**
* \brief This function performs a GCM authenticated decryption of a
* buffer.
*
* \note For decryption, the output buffer cannot be the same as
* input buffer. If the buffers overlap, the output buffer
* must trail at least 8 Bytes behind the input buffer.
*
* \param ctx The GCM context. This must be initialized.
* \param length The length of the ciphertext to decrypt, which is also
* the length of the decrypted plaintext.
* \param iv The initialization vector. This must be a readable buffer
* of at least \p iv_len Bytes.
* \param iv_len The length of the IV.
* \param add The buffer holding the additional data. This must be of at
* least that size in Bytes.
* \param add_len The length of the additional data.
* \param tag The buffer holding the tag to verify. This must be a
* readable buffer of at least \p tag_len Bytes.
* \param tag_len The length of the tag to verify.
* \param input The buffer holding the ciphertext. If \p length is greater
* than zero, this must be a readable buffer of at least that
* size.
* \param output The buffer for holding the decrypted plaintext. If \p length
* is greater than zero, this must be a writable buffer of at
* least that size.
*
* \return \c 0 if successful and authenticated.
* \return #MBEDTLS_ERR_GCM_AUTH_FAILED if the tag does not match.
* \return #MBEDTLS_ERR_GCM_BAD_INPUT if the lengths or pointers are
* not valid or a cipher-specific error code if the decryption
* failed.
*/
int mbedtls_gcm_auth_decrypt( mbedtls_gcm_context *ctx,
size_t length,
const unsigned char *iv,
@ -477,34 +593,34 @@ int mbedtls_gcm_auth_decrypt( mbedtls_gcm_context *ctx,
unsigned char check_tag[16];
size_t i;
int diff;
GCM_VALIDATE_RET( ctx != NULL );
GCM_VALIDATE_RET( iv != NULL );
GCM_VALIDATE_RET( add_len == 0 || add != NULL );
GCM_VALIDATE_RET( tag != NULL );
GCM_VALIDATE_RET( length == 0 || input != NULL );
GCM_VALIDATE_RET( length == 0 || output != NULL );
if( ( ret = mbedtls_gcm_crypt_and_tag( ctx, MBEDTLS_GCM_DECRYPT, length,
iv, iv_len, add, add_len,
input, output, tag_len, check_tag ) ) != 0 )
{
input, output, tag_len, check_tag ) ) != 0 ) {
return( ret );
}
/* Check tag in "constant-time" */
for( diff = 0, i = 0; i < tag_len; i++ )
diff |= tag[i] ^ check_tag[i];
if( diff != 0 )
{
if( diff != 0 ) {
mbedtls_platform_zeroize( output, length );
return( MBEDTLS_ERR_GCM_AUTH_FAILED );
}
return( 0 );
}
/**
* \brief This function clears a GCM context and the underlying
* cipher sub-context.
*
* \param ctx The GCM context to clear. If this is \c NULL, the call has
* no effect. Otherwise, this must be initialized.
*/
void mbedtls_gcm_free( mbedtls_gcm_context *ctx )
{
if( ctx == NULL )
@ -743,6 +859,12 @@ static const unsigned char tag_test_data[MAX_TESTS * 3][16] =
0xc8, 0xb5, 0xd4, 0xcf, 0x5a, 0xe9, 0xf1, 0x9a },
};
/**
* \brief The GCM checkup routine.
*
* \return \c 0 on success.
* \return \c 1 on failure.
*/
int mbedtls_gcm_self_test( int verbose )
{
mbedtls_gcm_context ctx;

289
third_party/mbedtls/gcm.h vendored
View file

@ -1,287 +1,38 @@
#ifndef MBEDTLS_GCM_H
#define MBEDTLS_GCM_H
#ifndef MBEDTLS_GCM_H_
#define MBEDTLS_GCM_H_
#include "third_party/mbedtls/cipher.h"
#include "third_party/mbedtls/config.h"
COSMOPOLITAN_C_START_
/* clang-format off */
#define MBEDTLS_GCM_ENCRYPT 1
#define MBEDTLS_GCM_DECRYPT 0
#define MBEDTLS_ERR_GCM_AUTH_FAILED -0x0012 /**< Authenticated decryption failed. */
/* MBEDTLS_ERR_GCM_HW_ACCEL_FAILED is deprecated and should not be used. */
#define MBEDTLS_ERR_GCM_HW_ACCEL_FAILED -0x0013 /**< GCM hardware accelerator failed. */
#define MBEDTLS_ERR_GCM_BAD_INPUT -0x0014 /**< Bad input parameters to function. */
#ifdef __cplusplus
extern "C" {
#endif
#if !defined(MBEDTLS_GCM_ALT)
/**
* \brief The GCM context structure.
*/
typedef struct mbedtls_gcm_context
{
typedef struct mbedtls_gcm_context {
mbedtls_cipher_context_t cipher_ctx; /*!< The cipher context used. */
uint64_t HL[16]; /*!< Precalculated HTable low. */
uint64_t HH[16]; /*!< Precalculated HTable high. */
uint64_t len; /*!< The total length of the encrypted data. */
uint64_t add_len; /*!< The total length of the additional data. */
unsigned char base_ectr[16]; /*!< The first ECTR for tag. */
unsigned char y[16]; /*!< The Y working value. */
unsigned char buf[16]; /*!< The buf working value. */
int mode; /*!< The operation to perform:
#MBEDTLS_GCM_ENCRYPT or
#MBEDTLS_GCM_DECRYPT. */
}
mbedtls_gcm_context;
int mode; /*!< The operation to perform: #MBEDTLS_GCM_ENCRYPT or #MBEDTLS_GCM_DECRYPT. */
uint64_t H8[2]; /*!< For AES-NI. */
uint64_t HL[16]; /*!< Precalculated HTable low. */
uint64_t HH[16]; /*!< Precalculated HTable high. */
} mbedtls_gcm_context;
#else /* !MBEDTLS_GCM_ALT */
/* #include "third_party/mbedtls/gcm_alt.h" */
#endif /* !MBEDTLS_GCM_ALT */
void mbedtls_gcm_init( mbedtls_gcm_context * );
int mbedtls_gcm_setkey( mbedtls_gcm_context *, mbedtls_cipher_id_t, const unsigned char *, unsigned int );
int mbedtls_gcm_crypt_and_tag( mbedtls_gcm_context *, int, size_t, const unsigned char *, size_t, const unsigned char *, size_t, const unsigned char *, unsigned char *, size_t, unsigned char * );
int mbedtls_gcm_auth_decrypt( mbedtls_gcm_context *, size_t, const unsigned char *, size_t, const unsigned char *, size_t, const unsigned char *, size_t, const unsigned char *, unsigned char * );
int mbedtls_gcm_starts( mbedtls_gcm_context *, int, const unsigned char *, size_t, const unsigned char *, size_t );
int mbedtls_gcm_update( mbedtls_gcm_context *, size_t, const unsigned char *, unsigned char * );
int mbedtls_gcm_finish( mbedtls_gcm_context *, unsigned char *, size_t );
void mbedtls_gcm_free( mbedtls_gcm_context * );
int mbedtls_gcm_self_test( int );
/**
* \brief This function initializes the specified GCM context,
* to make references valid, and prepares the context
* for mbedtls_gcm_setkey() or mbedtls_gcm_free().
*
* The function does not bind the GCM context to a particular
* cipher, nor set the key. For this purpose, use
* mbedtls_gcm_setkey().
*
* \param ctx The GCM context to initialize. This must not be \c NULL.
*/
void mbedtls_gcm_init( mbedtls_gcm_context *ctx );
/**
* \brief This function associates a GCM context with a
* cipher algorithm and a key.
*
* \param ctx The GCM context. This must be initialized.
* \param cipher The 128-bit block cipher to use.
* \param key The encryption key. This must be a readable buffer of at
* least \p keybits bits.
* \param keybits The key size in bits. Valid options are:
* <ul><li>128 bits</li>
* <li>192 bits</li>
* <li>256 bits</li></ul>
*
* \return \c 0 on success.
* \return A cipher-specific error code on failure.
*/
int mbedtls_gcm_setkey( mbedtls_gcm_context *ctx,
mbedtls_cipher_id_t cipher,
const unsigned char *key,
unsigned int keybits );
/**
* \brief This function performs GCM encryption or decryption of a buffer.
*
* \note For encryption, the output buffer can be the same as the
* input buffer. For decryption, the output buffer cannot be
* the same as input buffer. If the buffers overlap, the output
* buffer must trail at least 8 Bytes behind the input buffer.
*
* \warning When this function performs a decryption, it outputs the
* authentication tag and does not verify that the data is
* authentic. You should use this function to perform encryption
* only. For decryption, use mbedtls_gcm_auth_decrypt() instead.
*
* \param ctx The GCM context to use for encryption or decryption. This
* must be initialized.
* \param mode The operation to perform:
* - #MBEDTLS_GCM_ENCRYPT to perform authenticated encryption.
* The ciphertext is written to \p output and the
* authentication tag is written to \p tag.
* - #MBEDTLS_GCM_DECRYPT to perform decryption.
* The plaintext is written to \p output and the
* authentication tag is written to \p tag.
* Note that this mode is not recommended, because it does
* not verify the authenticity of the data. For this reason,
* you should use mbedtls_gcm_auth_decrypt() instead of
* calling this function in decryption mode.
* \param length The length of the input data, which is equal to the length
* of the output data.
* \param iv The initialization vector. This must be a readable buffer of
* at least \p iv_len Bytes.
* \param iv_len The length of the IV.
* \param add The buffer holding the additional data. This must be of at
* least that size in Bytes.
* \param add_len The length of the additional data.
* \param input The buffer holding the input data. If \p length is greater
* than zero, this must be a readable buffer of at least that
* size in Bytes.
* \param output The buffer for holding the output data. If \p length is greater
* than zero, this must be a writable buffer of at least that
* size in Bytes.
* \param tag_len The length of the tag to generate.
* \param tag The buffer for holding the tag. This must be a writable
* buffer of at least \p tag_len Bytes.
*
* \return \c 0 if the encryption or decryption was performed
* successfully. Note that in #MBEDTLS_GCM_DECRYPT mode,
* this does not indicate that the data is authentic.
* \return #MBEDTLS_ERR_GCM_BAD_INPUT if the lengths or pointers are
* not valid or a cipher-specific error code if the encryption
* or decryption failed.
*/
int mbedtls_gcm_crypt_and_tag( mbedtls_gcm_context *ctx,
int mode,
size_t length,
const unsigned char *iv,
size_t iv_len,
const unsigned char *add,
size_t add_len,
const unsigned char *input,
unsigned char *output,
size_t tag_len,
unsigned char *tag );
/**
* \brief This function performs a GCM authenticated decryption of a
* buffer.
*
* \note For decryption, the output buffer cannot be the same as
* input buffer. If the buffers overlap, the output buffer
* must trail at least 8 Bytes behind the input buffer.
*
* \param ctx The GCM context. This must be initialized.
* \param length The length of the ciphertext to decrypt, which is also
* the length of the decrypted plaintext.
* \param iv The initialization vector. This must be a readable buffer
* of at least \p iv_len Bytes.
* \param iv_len The length of the IV.
* \param add The buffer holding the additional data. This must be of at
* least that size in Bytes.
* \param add_len The length of the additional data.
* \param tag The buffer holding the tag to verify. This must be a
* readable buffer of at least \p tag_len Bytes.
* \param tag_len The length of the tag to verify.
* \param input The buffer holding the ciphertext. If \p length is greater
* than zero, this must be a readable buffer of at least that
* size.
* \param output The buffer for holding the decrypted plaintext. If \p length
* is greater than zero, this must be a writable buffer of at
* least that size.
*
* \return \c 0 if successful and authenticated.
* \return #MBEDTLS_ERR_GCM_AUTH_FAILED if the tag does not match.
* \return #MBEDTLS_ERR_GCM_BAD_INPUT if the lengths or pointers are
* not valid or a cipher-specific error code if the decryption
* failed.
*/
int mbedtls_gcm_auth_decrypt( mbedtls_gcm_context *ctx,
size_t length,
const unsigned char *iv,
size_t iv_len,
const unsigned char *add,
size_t add_len,
const unsigned char *tag,
size_t tag_len,
const unsigned char *input,
unsigned char *output );
/**
* \brief This function starts a GCM encryption or decryption
* operation.
*
* \param ctx The GCM context. This must be initialized.
* \param mode The operation to perform: #MBEDTLS_GCM_ENCRYPT or
* #MBEDTLS_GCM_DECRYPT.
* \param iv The initialization vector. This must be a readable buffer of
* at least \p iv_len Bytes.
* \param iv_len The length of the IV.
* \param add The buffer holding the additional data, or \c NULL
* if \p add_len is \c 0.
* \param add_len The length of the additional data. If \c 0,
* \p add may be \c NULL.
*
* \return \c 0 on success.
*/
int mbedtls_gcm_starts( mbedtls_gcm_context *ctx,
int mode,
const unsigned char *iv,
size_t iv_len,
const unsigned char *add,
size_t add_len );
/**
* \brief This function feeds an input buffer into an ongoing GCM
* encryption or decryption operation.
*
* ` The function expects input to be a multiple of 16
* Bytes. Only the last call before calling
* mbedtls_gcm_finish() can be less than 16 Bytes.
*
* \note For decryption, the output buffer cannot be the same as
* input buffer. If the buffers overlap, the output buffer
* must trail at least 8 Bytes behind the input buffer.
*
* \param ctx The GCM context. This must be initialized.
* \param length The length of the input data. This must be a multiple of
* 16 except in the last call before mbedtls_gcm_finish().
* \param input The buffer holding the input data. If \p length is greater
* than zero, this must be a readable buffer of at least that
* size in Bytes.
* \param output The buffer for holding the output data. If \p length is
* greater than zero, this must be a writable buffer of at
* least that size in Bytes.
*
* \return \c 0 on success.
* \return #MBEDTLS_ERR_GCM_BAD_INPUT on failure.
*/
int mbedtls_gcm_update( mbedtls_gcm_context *ctx,
size_t length,
const unsigned char *input,
unsigned char *output );
/**
* \brief This function finishes the GCM operation and generates
* the authentication tag.
*
* It wraps up the GCM stream, and generates the
* tag. The tag can have a maximum length of 16 Bytes.
*
* \param ctx The GCM context. This must be initialized.
* \param tag The buffer for holding the tag. This must be a writable
* buffer of at least \p tag_len Bytes.
* \param tag_len The length of the tag to generate. This must be at least
* four.
*
* \return \c 0 on success.
* \return #MBEDTLS_ERR_GCM_BAD_INPUT on failure.
*/
int mbedtls_gcm_finish( mbedtls_gcm_context *ctx,
unsigned char *tag,
size_t tag_len );
/**
* \brief This function clears a GCM context and the underlying
* cipher sub-context.
*
* \param ctx The GCM context to clear. If this is \c NULL, the call has
* no effect. Otherwise, this must be initialized.
*/
void mbedtls_gcm_free( mbedtls_gcm_context *ctx );
#if defined(MBEDTLS_SELF_TEST)
/**
* \brief The GCM checkup routine.
*
* \return \c 0 on success.
* \return \c 1 on failure.
*/
int mbedtls_gcm_self_test( int verbose );
#endif /* MBEDTLS_SELF_TEST */
#ifdef __cplusplus
}
#endif
#endif /* gcm.h */
COSMOPOLITAN_C_END_
#endif /* MBEDTLS_GCM_H_ */

5
third_party/mbedtls/platform.h vendored
View file

@ -1,6 +1,7 @@
#ifndef COSMOPOLITAN_THIRD_PARTY_MBEDTLS_PLATFORM_H_
#define COSMOPOLITAN_THIRD_PARTY_MBEDTLS_PLATFORM_H_
#include "libc/assert.h"
#include "libc/bits/likely.h"
#include "libc/calls/weirdtypes.h"
#include "libc/fmt/fmt.h"
#include "libc/mem/mem.h"
@ -34,7 +35,7 @@ COSMOPOLITAN_C_START_
#define MBEDTLS_INTERNAL_VALIDATE_RET(cond, ret) \
do { \
if (!(cond)) { \
if (UNLIKELY(!(cond))) { \
MBEDTLS_PARAM_FAILED(cond); \
return ret; \
} \
@ -42,7 +43,7 @@ COSMOPOLITAN_C_START_
#define MBEDTLS_INTERNAL_VALIDATE(cond) \
do { \
if (!(cond)) { \
if (UNLIKELY(!(cond))) { \
MBEDTLS_PARAM_FAILED(cond); \
return; \
} \

2
third_party/mbedtls/sha1.c vendored
View file

@ -149,7 +149,7 @@ int mbedtls_internal_sha1_process( mbedtls_sha1_context *ctx,
SHA1_VALIDATE_RET( ctx != NULL );
SHA1_VALIDATE_RET( (const unsigned char *)data != NULL );
if (!IsTiny() && X86_HAVE(AVX2) && X86_HAVE(BMI) && X86_HAVE(BMI2)) {
if (!IsTiny() && LIKELY(X86_HAVE(AVX2) && X86_HAVE(BMI) && X86_HAVE(BMI2))) {
sha1_transform_avx2(ctx, data, 1);
return 0;
}