* Base64-encode data
*
* @v raw Raw data
- * @v len Length of raw data
- * @v encoded Buffer for encoded string
- *
- * The buffer must be the correct length for the encoded string. Use
- * something like
- *
- * char buf[ base64_encoded_len ( len ) + 1 ];
- *
- * (the +1 is for the terminating NUL) to provide a buffer of the
- * correct size.
+ * @v raw_len Length of raw data
+ * @v data Buffer
+ * @v len Length of buffer
+ * @ret len Encoded length
*/
-void base64_encode ( const uint8_t *raw, size_t len, char *encoded ) {
+size_t base64_encode ( const void *raw, size_t raw_len, char *data,
+ size_t len ) {
const uint8_t *raw_bytes = ( ( const uint8_t * ) raw );
- uint8_t *encoded_bytes = ( ( uint8_t * ) encoded );
- size_t raw_bit_len = ( 8 * len );
+ size_t raw_bit_len = ( 8 * raw_len );
+ size_t used = 0;
unsigned int bit;
unsigned int byte;
unsigned int shift;
unsigned int tmp;
- for ( bit = 0 ; bit < raw_bit_len ; bit += 6 ) {
+ for ( bit = 0 ; bit < raw_bit_len ; bit += 6, used++ ) {
byte = ( bit / 8 );
shift = ( bit % 8 );
tmp = ( raw_bytes[byte] << shift );
- if ( ( byte + 1 ) < len )
+ if ( ( byte + 1 ) < raw_len )
tmp |= ( raw_bytes[ byte + 1 ] >> ( 8 - shift ) );
tmp = ( ( tmp >> 2 ) & 0x3f );
- *(encoded_bytes++) = base64[tmp];
+ if ( used < len )
+ data[used] = base64[tmp];
}
- for ( ; ( bit % 8 ) != 0 ; bit += 6 )
- *(encoded_bytes++) = '=';
- *(encoded_bytes++) = '\0';
+ for ( ; ( bit % 8 ) != 0 ; bit += 6, used++ ) {
+ if ( used < len )
+ data[used] = '=';
+ }
+ if ( used < len )
+ data[used] = '\0';
+ if ( len )
+ data[ len - 1 ] = '\0'; /* Ensure terminator exists */
- DBG ( "Base64-encoded to \"%s\":\n", encoded );
- DBG_HDA ( 0, raw, len );
- assert ( strlen ( encoded ) == base64_encoded_len ( len ) );
+ return used;
}
/**
* Base64-decode string
*
* @v encoded Encoded string
- * @v raw Raw data
- * @ret len Length of raw data, or negative error
- *
- * The buffer must be large enough to contain the decoded data. Use
- * something like
- *
- * char buf[ base64_decoded_max_len ( encoded ) ];
- *
- * to provide a buffer of the correct size.
+ * @v data Buffer
+ * @v len Length of buffer
+ * @ret len Length of data, or negative error
*/
-int base64_decode ( const char *encoded, uint8_t *raw ) {
- const uint8_t *encoded_bytes = ( ( const uint8_t * ) encoded );
- uint8_t *raw_bytes = ( ( uint8_t * ) raw );
- uint8_t encoded_byte;
+int base64_decode ( const char *encoded, void *data, size_t len ) {
+ const char *in = encoded;
+ uint8_t *out = data;
+ uint8_t in_char;
char *match;
- int decoded;
+ int in_bits;
unsigned int bit = 0;
unsigned int pad_count = 0;
- size_t len;
+ size_t offset;
- /* Zero the raw data */
- memset ( raw, 0, base64_decoded_max_len ( encoded ) );
+ /* Zero the output buffer */
+ memset ( data, 0, len );
/* Decode string */
- while ( ( encoded_byte = *(encoded_bytes++) ) ) {
+ while ( ( in_char = *(in++) ) ) {
/* Ignore whitespace characters */
- if ( isspace ( encoded_byte ) )
+ if ( isspace ( in_char ) )
continue;
/* Process pad characters */
- if ( encoded_byte == '=' ) {
+ if ( in_char == '=' ) {
if ( pad_count >= 2 ) {
DBG ( "Base64-encoded string \"%s\" has too "
"many pad characters\n", encoded );
}
/* Process normal characters */
- match = strchr ( base64, encoded_byte );
+ match = strchr ( base64, in_char );
if ( ! match ) {
DBG ( "Base64-encoded string \"%s\" contains invalid "
- "character '%c'\n", encoded, encoded_byte );
+ "character '%c'\n", encoded, in_char );
return -EINVAL;
}
- decoded = ( match - base64 );
+ in_bits = ( match - base64 );
/* Add to raw data */
- decoded <<= 2;
- raw_bytes[ bit / 8 ] |= ( decoded >> ( bit % 8 ) );
- raw_bytes[ bit / 8 + 1 ] |= ( decoded << ( 8 - ( bit % 8 ) ) );
+ in_bits <<= 2;
+ offset = ( bit / 8 );
+ if ( offset < len )
+ out[offset] |= ( in_bits >> ( bit % 8 ) );
+ offset++;
+ if ( offset < len )
+ out[offset] |= ( in_bits << ( 8 - ( bit % 8 ) ) );
bit += 6;
}
"%d\n", encoded, bit );
return -EINVAL;
}
- len = ( bit / 8 );
-
- DBG ( "Base64-decoded \"%s\" to:\n", encoded );
- DBG_HDA ( 0, raw, len );
- assert ( len <= base64_decoded_max_len ( encoded ) );
/* Return length in bytes */
- return ( len );
+ return ( bit / 8 );
}
goto err_path_base64;
}
base64_encode ( ocsp->request.builder.data, ocsp->request.builder.len,
- path_base64_string );
+ path_base64_string, path_len );
/* URI-encode the Base64-encoded request */
memset ( &path_uri, 0, sizeof ( path_uri ) );
return ( ( ( strlen ( encoded ) + 4 - 1 ) / 4 ) * 3 );
}
-extern void base64_encode ( const uint8_t *raw, size_t len, char *encoded );
-extern int base64_decode ( const char *encoded, uint8_t *raw );
+extern size_t base64_encode ( const void *raw, size_t raw_len, char *data,
+ size_t len );
+extern int base64_decode ( const char *encoded, void *data, size_t len );
#endif /* _IPXE_BASE64_H */
snprintf ( user_pw, sizeof ( user_pw ), "%s:%s", user, password );
/* Base64-encode the "user:password" string */
- base64_encode ( ( void * ) user_pw, user_pw_len, user_pw_base64 );
+ base64_encode ( user_pw, user_pw_len, user_pw_base64,
+ sizeof ( user_pw_base64 ) );
/* Generate the authorisation string */
len = asprintf ( &auth, "Authorization: Basic %s\r\n",
case 'x' :
return base16_decode ( encoded, raw, len );
case 'b' :
- return base64_decode ( encoded, raw );
+ return base64_decode ( encoded, raw, len );
}
}
/* Generate URI string */
len = snprintf ( uri_string, uri_string_len, "%s/%08x.der?subject=",
crosscert, crc );
- base64_encode ( issuer->data, issuer->len, ( uri_string + len ) );
+ base64_encode ( issuer->data, issuer->len, ( uri_string + len ),
+ ( uri_string_len - len ) );
DBGC ( validator, "VALIDATOR %p downloading cross-signed certificate "
"from %s\n", validator, uri_string );
* Report a base64 encoding test result
*
* @v test Base64 test
+ * @v file Test code file
+ * @v line Test code line
*/
-#define base64_encode_ok( test ) do { \
- size_t len = base64_encoded_len ( (test)->len ); \
- char buf[ len + 1 /* NUL */ ]; \
- ok ( len == strlen ( (test)->encoded ) ); \
- base64_encode ( (test)->data, (test)->len, buf ); \
- ok ( strcmp ( (test)->encoded, buf ) == 0 ); \
- } while ( 0 )
+static void base64_encode_okx ( struct base64_test *test, const char *file,
+ unsigned int line ) {
+ size_t len = base64_encoded_len ( test->len );
+ char buf[ len + 1 /* NUL */ ];
+ size_t check_len;
+
+ okx ( len == strlen ( test->encoded ), file, line );
+ check_len = base64_encode ( test->data, test->len, buf, sizeof ( buf ));
+ okx ( check_len == len, file, line );
+ okx ( strcmp ( test->encoded, buf ) == 0, file, line );
+}
+#define base64_encode_ok( test ) base64_encode_okx ( test, __FILE__, __LINE__ )
/**
* Report a base64 decoding test result
*
* @v test Base64 test
+ * @v file Test code file
+ * @v line Test code line
*/
-#define base64_decode_ok( test ) do { \
- size_t max_len = base64_decoded_max_len ( (test)->encoded ); \
- uint8_t buf[max_len]; \
- int len; \
- len = base64_decode ( (test)->encoded, buf ); \
- ok ( len >= 0 ); \
- ok ( ( size_t ) len <= max_len ); \
- ok ( ( size_t ) len == (test)->len ); \
- ok ( memcmp ( (test)->data, buf, len ) == 0 ); \
- } while ( 0 )
+static void base64_decode_okx ( struct base64_test *test, const char *file,
+ unsigned int line ) {
+ size_t max_len = base64_decoded_max_len ( test->encoded );
+ uint8_t buf[max_len];
+ int len;
+
+ len = base64_decode ( test->encoded, buf, sizeof ( buf ) );
+ okx ( len >= 0, file, line );
+ okx ( ( size_t ) len <= max_len, file, line );
+ okx ( ( size_t ) len == test->len, file, line );
+ okx ( memcmp ( test->data, buf, len ) == 0, file, line );
+}
+#define base64_decode_ok( test ) base64_decode_okx ( test, __FILE__, __LINE__ )
/**
* Perform Base64 self-tests
projects / thirdparty / ipxe.git / commitdiff
