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Bind functions' availability for config options

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Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
This commit is contained in:
Gabor Mezei 2021-10-18 17:05:06 +02:00
parent 4e2de62fef
commit 2b35880d41
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GPG Key ID: 106F5A41ECC305BD
2 changed files with 20 additions and 7 deletions
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19
library/constant_time.c
View File

@ -108,6 +108,8 @@ mbedtls_mpi_uint mbedtls_cf_mpi_uint_mask( mbedtls_mpi_uint value )
#endif /* MBEDTLS_BIGNUM_C */
#if defined(MBEDTLS_SSL_SOME_SUITES_USE_TLS_CBC)
/** Constant-flow mask generation for "less than" comparison:
* - if \p x < \p y, return all-bits 1, that is (size_t) -1
* - otherwise, return all bits 0, that is 0
@ -141,6 +143,8 @@ size_t mbedtls_cf_size_mask_ge( size_t x,
return( ~mbedtls_cf_size_mask_lt( x, y ) );
}
#endif /* MBEDTLS_SSL_SOME_SUITES_USE_TLS_CBC */
unsigned mbedtls_cf_size_bool_eq( size_t x,
size_t y )
{
@ -167,6 +171,8 @@ unsigned mbedtls_cf_size_bool_eq( size_t x,
return( 1 ^ diff1 );
}
#if defined(MBEDTLS_PKCS1_V15) && defined(MBEDTLS_RSA_C) && !defined(MBEDTLS_RSA_ALT)
/** Constant-flow "greater than" comparison:
* return x > y
*
@ -185,6 +191,8 @@ static unsigned mbedtls_cf_size_gt( size_t x,
return( ( y - x ) >> ( sizeof( size_t ) * 8 - 1 ) );
}
#endif /* MBEDTLS_PKCS1_V15 && MBEDTLS_RSA_C && ! MBEDTLS_RSA_ALT */
#if defined(MBEDTLS_BIGNUM_C)
unsigned mbedtls_cf_mpi_uint_lt( const mbedtls_mpi_uint x,
@ -225,6 +233,7 @@ unsigned mbedtls_cf_uint_if( unsigned condition,
return( ( mask & if1 ) | (~mask & if0 ) );
}
#if defined(MBEDTLS_BIGNUM_C)
/** Select between two sign values witout branches.
*
@ -260,8 +269,6 @@ static int mbedtls_cf_cond_select_sign( unsigned char condition,
return( (int) ur - 1 );
}
#if defined(MBEDTLS_BIGNUM_C)
void mbedtls_cf_mpi_uint_cond_assign( size_t n,
mbedtls_mpi_uint *dest,
const mbedtls_mpi_uint *src,
@ -289,6 +296,8 @@ void mbedtls_cf_mpi_uint_cond_assign( size_t n,
#endif /* MBEDTLS_BIGNUM_C */
#if defined(MBEDTLS_PKCS1_V15) && defined(MBEDTLS_RSA_C) && !defined(MBEDTLS_RSA_ALT)
/** Shift some data towards the left inside a buffer.
*
* `mbedtls_cf_mem_move_to_left(start, total, offset)` is functionally
@ -329,6 +338,10 @@ static void mbedtls_cf_mem_move_to_left( void *start,
}
}
#endif /* MBEDTLS_PKCS1_V15 && MBEDTLS_RSA_C && ! MBEDTLS_RSA_ALT */
#if defined(MBEDTLS_SSL_SOME_SUITES_USE_TLS_CBC)
void mbedtls_cf_memcpy_if_eq( unsigned char *dest,
const unsigned char *src,
size_t len,
@ -360,8 +373,6 @@ void mbedtls_cf_memcpy_offset( unsigned char *dest,
}
}
#if defined(MBEDTLS_SSL_SOME_SUITES_USE_TLS_CBC)
int mbedtls_cf_hmac( mbedtls_md_context_t *ctx,
const unsigned char *add_data,
size_t add_data_len,

8
library/constant_time.h
View File

@ -92,6 +92,8 @@ mbedtls_mpi_uint mbedtls_cf_mpi_uint_mask( mbedtls_mpi_uint value );
#endif /* MBEDTLS_BIGNUM_C */
#if defined(MBEDTLS_SSL_SOME_SUITES_USE_TLS_CBC)
/** Constant-flow mask generation for "greater or equal" comparison:
* - if \p x >= \p y, return all-bits 1, that is (size_t) -1
* - otherwise, return all bits 0, that is 0
@ -108,6 +110,8 @@ mbedtls_mpi_uint mbedtls_cf_mpi_uint_mask( mbedtls_mpi_uint value );
size_t mbedtls_cf_size_mask_ge( size_t x,
size_t y );
#endif /* MBEDTLS_SSL_SOME_SUITES_USE_TLS_CBC */
/** Constant-flow boolean "equal" comparison:
* return x == y
*
@ -122,7 +126,6 @@ size_t mbedtls_cf_size_mask_ge( size_t x,
unsigned mbedtls_cf_size_bool_eq( size_t x,
size_t y );
#if defined(MBEDTLS_BIGNUM_C)
/** Decide if an integer is less than the other, without branches.
@ -176,6 +179,7 @@ void mbedtls_cf_mpi_uint_cond_assign( size_t n,
#endif /* MBEDTLS_BIGNUM_C */
#if defined(MBEDTLS_SSL_SOME_SUITES_USE_TLS_CBC)
/** Conditional memcpy without branches.
*
@ -219,8 +223,6 @@ void mbedtls_cf_memcpy_offset( unsigned char *dest,
size_t offset_max,
size_t len );
#if defined(MBEDTLS_SSL_SOME_SUITES_USE_TLS_CBC)
/** Compute the HMAC of variable-length data with constant flow.
*
* This function computes the HMAC of the concatenation of \p add_data and \p