diff options
Diffstat (limited to 'thirdparty/mbedtls/patches/pr4819-faster-base64.patch')
| -rw-r--r-- | thirdparty/mbedtls/patches/pr4819-faster-base64.patch | 341 |
1 files changed, 0 insertions, 341 deletions
diff --git a/thirdparty/mbedtls/patches/pr4819-faster-base64.patch b/thirdparty/mbedtls/patches/pr4819-faster-base64.patch deleted file mode 100644 index 2f25b7b54c..0000000000 --- a/thirdparty/mbedtls/patches/pr4819-faster-base64.patch +++ /dev/null @@ -1,341 +0,0 @@ -diff --git a/library/base64.c b/library/base64.c -index 692e11e3fae..b89313062b6 100644 ---- a/library/base64.c -+++ b/library/base64.c -@@ -66,127 +66,38 @@ - #endif /* MBEDTLS_PLATFORM_C */ - #endif /* MBEDTLS_SELF_TEST */ - --static const unsigned char base64_enc_map[64] = --{ -- 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', -- 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', -- 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', -- 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', -- 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', -- 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', -- '8', '9', '+', '/' --}; -- --static const unsigned char base64_dec_map[128] = --{ -- 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, -- 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, -- 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, -- 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, -- 127, 127, 127, 62, 127, 127, 127, 63, 52, 53, -- 54, 55, 56, 57, 58, 59, 60, 61, 127, 127, -- 127, 64, 127, 127, 127, 0, 1, 2, 3, 4, -- 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, -- 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, -- 25, 127, 127, 127, 127, 127, 127, 26, 27, 28, -- 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, -- 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, -- 49, 50, 51, 127, 127, 127, 127, 127 --}; -- - #define BASE64_SIZE_T_MAX ( (size_t) -1 ) /* SIZE_T_MAX is not standard */ - --/* -- * Constant flow conditional assignment to unsigned char -- */ --static void mbedtls_base64_cond_assign_uchar( unsigned char * dest, const unsigned char * const src, -- unsigned char condition ) --{ -- /* MSVC has a warning about unary minus on unsigned integer types, -- * but this is well-defined and precisely what we want to do here. */ --#if defined(_MSC_VER) --#pragma warning( push ) --#pragma warning( disable : 4146 ) --#endif -- -- /* Generate bitmask from condition, mask will either be 0xFF or 0 */ -- unsigned char mask = ( condition | -condition ); -- mask >>= 7; -- mask = -mask; -- --#if defined(_MSC_VER) --#pragma warning( pop ) --#endif -- -- *dest = ( ( *src ) & mask ) | ( ( *dest ) & ~mask ); --} -- --/* -- * Constant flow conditional assignment to uint_32 -- */ --static void mbedtls_base64_cond_assign_uint32( uint32_t * dest, const uint32_t src, -- uint32_t condition ) --{ -- /* MSVC has a warning about unary minus on unsigned integer types, -- * but this is well-defined and precisely what we want to do here. */ --#if defined(_MSC_VER) --#pragma warning( push ) --#pragma warning( disable : 4146 ) --#endif -- -- /* Generate bitmask from condition, mask will either be 0xFFFFFFFF or 0 */ -- uint32_t mask = ( condition | -condition ); -- mask >>= 31; -- mask = -mask; -- --#if defined(_MSC_VER) --#pragma warning( pop ) --#endif -- -- *dest = ( src & mask ) | ( ( *dest ) & ~mask ); --} -- --/* -- * Constant flow check for equality -+/* Return 0xff if low <= c <= high, 0 otherwise. -+ * -+ * Constant flow with respect to c. - */ --static unsigned char mbedtls_base64_eq( size_t in_a, size_t in_b ) -+static unsigned char mask_of_range( unsigned char low, unsigned char high, -+ unsigned char c ) - { -- size_t difference = in_a ^ in_b; -- -- /* MSVC has a warning about unary minus on unsigned integer types, -- * but this is well-defined and precisely what we want to do here. */ --#if defined(_MSC_VER) --#pragma warning( push ) --#pragma warning( disable : 4146 ) --#endif -- -- difference |= -difference; -- --#if defined(_MSC_VER) --#pragma warning( pop ) --#endif -- -- /* cope with the varying size of size_t per platform */ -- difference >>= ( sizeof( difference ) * 8 - 1 ); -- -- return (unsigned char) ( 1 ^ difference ); -+ /* low_mask is: 0 if low <= c, 0x...ff if low > c */ -+ unsigned low_mask = ( (unsigned) c - low ) >> 8; -+ /* high_mask is: 0 if c <= high, 0x...ff if high > c */ -+ unsigned high_mask = ( (unsigned) high - c ) >> 8; -+ return( ~( low_mask | high_mask ) & 0xff ); - } - --/* -- * Constant flow lookup into table. -+/* Given a value in the range 0..63, return the corresponding Base64 digit. -+ * The implementation assumes that letters are consecutive (e.g. ASCII -+ * but not EBCDIC). - */ --static unsigned char mbedtls_base64_table_lookup( const unsigned char * const table, -- const size_t table_size, const size_t table_index ) -+static unsigned char enc_char( unsigned char val ) - { -- 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; -+ unsigned char digit = 0; -+ /* For each range of values, if val is in that range, mask digit with -+ * the corresponding value. Since val can only be in a single range, -+ * only at most one masking will change digit. */ -+ digit |= mask_of_range( 0, 25, val ) & ( 'A' + val ); -+ digit |= mask_of_range( 26, 51, val ) & ( 'a' + val - 26 ); -+ digit |= mask_of_range( 52, 61, val ) & ( '0' + val - 52 ); -+ digit |= mask_of_range( 62, 62, val ) & '+'; -+ digit |= mask_of_range( 63, 63, val ) & '/'; -+ return( digit ); - } - - /* -@@ -229,17 +140,10 @@ int mbedtls_base64_encode( unsigned char *dst, size_t dlen, size_t *olen, - C2 = *src++; - C3 = *src++; - -- *p++ = mbedtls_base64_table_lookup( base64_enc_map, sizeof( base64_enc_map ), -- ( ( C1 >> 2 ) & 0x3F ) ); -- -- *p++ = mbedtls_base64_table_lookup( base64_enc_map, sizeof( base64_enc_map ), -- ( ( ( ( C1 & 3 ) << 4 ) + ( C2 >> 4 ) ) & 0x3F ) ); -- -- *p++ = mbedtls_base64_table_lookup( base64_enc_map, sizeof( base64_enc_map ), -- ( ( ( ( C2 & 15 ) << 2 ) + ( C3 >> 6 ) ) & 0x3F ) ); -- -- *p++ = mbedtls_base64_table_lookup( base64_enc_map, sizeof( base64_enc_map ), -- ( C3 & 0x3F ) ); -+ *p++ = enc_char( ( C1 >> 2 ) & 0x3F ); -+ *p++ = enc_char( ( ( ( C1 & 3 ) << 4 ) + ( C2 >> 4 ) ) & 0x3F ); -+ *p++ = enc_char( ( ( ( C2 & 15 ) << 2 ) + ( C3 >> 6 ) ) & 0x3F ); -+ *p++ = enc_char( C3 & 0x3F ); - } - - if( i < slen ) -@@ -247,15 +151,11 @@ int mbedtls_base64_encode( unsigned char *dst, size_t dlen, size_t *olen, - C1 = *src++; - C2 = ( ( i + 1 ) < slen ) ? *src++ : 0; - -- *p++ = mbedtls_base64_table_lookup( base64_enc_map, sizeof( base64_enc_map ), -- ( ( C1 >> 2 ) & 0x3F ) ); -- -- *p++ = mbedtls_base64_table_lookup( base64_enc_map, sizeof( base64_enc_map ), -- ( ( ( ( C1 & 3 ) << 4 ) + ( C2 >> 4 ) ) & 0x3F ) ); -+ *p++ = enc_char( ( C1 >> 2 ) & 0x3F ); -+ *p++ = enc_char( ( ( ( C1 & 3 ) << 4 ) + ( C2 >> 4 ) ) & 0x3F ); - - if( ( i + 1 ) < slen ) -- *p++ = mbedtls_base64_table_lookup( base64_enc_map, sizeof( base64_enc_map ), -- ( ( ( C2 & 15 ) << 2 ) & 0x3F ) ); -+ *p++ = enc_char( ( ( C2 & 15 ) << 2 ) & 0x3F ); - else *p++ = '='; - - *p++ = '='; -@@ -267,26 +167,57 @@ int mbedtls_base64_encode( unsigned char *dst, size_t dlen, size_t *olen, - return( 0 ); - } - -+/* Given a Base64 digit, return its value. -+ * If c is not a Base64 digit ('A'..'Z', 'a'..'z', '0'..'9', '+' or '/'), -+ * return -1. -+ * -+ * The implementation assumes that letters are consecutive (e.g. ASCII -+ * but not EBCDIC). -+ * -+ * The implementation is constant-flow (no branch or memory access depending -+ * on the value of c) unless the compiler inlines and optimizes a specific -+ * access. -+ */ -+static signed char dec_value( unsigned char c ) -+{ -+ unsigned char val = 0; -+ /* For each range of digits, if c is in that range, mask val with -+ * the corresponding value. Since c can only be in a single range, -+ * only at most one masking will change val. Set val to one plus -+ * the desired value so that it stays 0 if c is in none of the ranges. */ -+ val |= mask_of_range( 'A', 'Z', c ) & ( c - 'A' + 0 + 1 ); -+ val |= mask_of_range( 'a', 'z', c ) & ( c - 'a' + 26 + 1 ); -+ val |= mask_of_range( '0', '9', c ) & ( c - '0' + 52 + 1 ); -+ val |= mask_of_range( '+', '+', c ) & ( c - '+' + 62 + 1 ); -+ val |= mask_of_range( '/', '/', c ) & ( c - '/' + 63 + 1 ); -+ /* At this point, val is 0 if c is an invalid digit and v+1 if c is -+ * a digit with the value v. */ -+ return( val - 1 ); -+} -+ - /* - * Decode a base64-formatted buffer - */ - int mbedtls_base64_decode( unsigned char *dst, size_t dlen, size_t *olen, - const unsigned char *src, size_t slen ) - { -- size_t i, n; -- uint32_t j, x; -+ size_t i; /* index in source */ -+ size_t n; /* number of digits or trailing = in source */ -+ uint32_t x; /* value accumulator */ -+ unsigned accumulated_digits = 0; -+ unsigned equals = 0; -+ int spaces_present = 0; - unsigned char *p; -- unsigned char dec_map_lookup; - - /* First pass: check for validity and get output length */ -- for( i = n = j = 0; i < slen; i++ ) -+ for( i = n = 0; i < slen; i++ ) - { - /* Skip spaces before checking for EOL */ -- x = 0; -+ spaces_present = 0; - while( i < slen && src[i] == ' ' ) - { - ++i; -- ++x; -+ spaces_present = 1; - } - - /* Spaces at end of buffer are OK */ -@@ -301,20 +232,24 @@ int mbedtls_base64_decode( unsigned char *dst, size_t dlen, size_t *olen, - continue; - - /* Space inside a line is an error */ -- if( x != 0 ) -+ if( spaces_present ) - return( MBEDTLS_ERR_BASE64_INVALID_CHARACTER ); - -- if( src[i] == '=' && ++j > 2 ) -- return( MBEDTLS_ERR_BASE64_INVALID_CHARACTER ); -- -- dec_map_lookup = mbedtls_base64_table_lookup( base64_dec_map, sizeof( base64_dec_map ), src[i] ); -- -- if( src[i] > 127 || dec_map_lookup == 127 ) -- return( MBEDTLS_ERR_BASE64_INVALID_CHARACTER ); -- -- if( dec_map_lookup < 64 && j != 0 ) -+ if( src[i] > 127 ) - return( MBEDTLS_ERR_BASE64_INVALID_CHARACTER ); - -+ if( src[i] == '=' ) -+ { -+ if( ++equals > 2 ) -+ return( MBEDTLS_ERR_BASE64_INVALID_CHARACTER ); -+ } -+ else -+ { -+ if( equals != 0 ) -+ return( MBEDTLS_ERR_BASE64_INVALID_CHARACTER ); -+ if( dec_value( src[i] ) < 0 ) -+ return( MBEDTLS_ERR_BASE64_INVALID_CHARACTER ); -+ } - n++; - } - -@@ -329,7 +264,7 @@ int mbedtls_base64_decode( unsigned char *dst, size_t dlen, size_t *olen, - * n = ( ( n * 6 ) + 7 ) >> 3; - */ - n = ( 6 * ( n >> 3 ) ) + ( ( 6 * ( n & 0x7 ) + 7 ) >> 3 ); -- n -= j; -+ n -= equals; - - if( dst == NULL || dlen < n ) - { -@@ -337,22 +272,24 @@ int mbedtls_base64_decode( unsigned char *dst, size_t dlen, size_t *olen, - return( MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL ); - } - -- for( j = 3, n = x = 0, p = dst; i > 0; i--, src++ ) -- { -+ equals = 0; -+ for( x = 0, p = dst; i > 0; i--, src++ ) -+ { - if( *src == '\r' || *src == '\n' || *src == ' ' ) - continue; - -- dec_map_lookup = mbedtls_base64_table_lookup( base64_dec_map, sizeof( base64_dec_map ), *src ); -- -- mbedtls_base64_cond_assign_uint32( &j, j - 1, mbedtls_base64_eq( dec_map_lookup, 64 ) ); -- x = ( x << 6 ) | ( dec_map_lookup & 0x3F ); -+ x = x << 6; -+ if( *src == '=' ) -+ ++equals; -+ else -+ x |= dec_value( *src ); - -- if( ++n == 4 ) -+ if( ++accumulated_digits == 4 ) - { -- n = 0; -- if( j > 0 ) *p++ = (unsigned char)( x >> 16 ); -- if( j > 1 ) *p++ = (unsigned char)( x >> 8 ); -- if( j > 2 ) *p++ = (unsigned char)( x ); -+ accumulated_digits = 0; -+ *p++ = (unsigned char)( x >> 16 ); -+ if( equals <= 1 ) *p++ = (unsigned char)( x >> 8 ); -+ if( equals <= 0 ) *p++ = (unsigned char)( x ); - } - } - |