[core] refactor base64 functions into separate file
Differential Revision: https://review.lighttpd.net/D6 From: Stefan Bühler <stbuehler@web.de> git-svn-id: svn://svn.lighttpd.net/lighttpd/branches/lighttpd-1.4.x@3053 152afb58-edef-0310-8abb-c4023f1b3aa9svn/tags/lighttpd-1.4.38
parent
85d8a17575
commit
b0a4421272
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@ -474,7 +474,7 @@ add_definitions(-DHAVE_CONFIG_H)
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include_directories(${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR})
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set(COMMON_SRC
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buffer.c log.c
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base64.c buffer.c log.c
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keyvalue.c chunk.c
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http_chunk.c stream.c fdevent.c
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stat_cache.c plugin.c joblist.c etag.c array.c
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@ -56,7 +56,7 @@ BUILT_SOURCES = parsers versionstamp
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MAINTAINERCLEANFILES = configparser.c configparser.h mod_ssi_exprparser.c mod_ssi_exprparser.h
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CLEANFILES = versionstamp.h versionstamp.h.tmp
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common_src=buffer.c log.c \
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common_src=base64.c buffer.c log.c \
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keyvalue.c chunk.c \
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http_chunk.c stream.c fdevent.c \
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stat_cache.c plugin.c joblist.c etag.c array.c \
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@ -294,20 +294,6 @@ proc_open_SOURCES = proc_open.c buffer.c
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proc_open_LDADD = $(LIBUNWIND_LIBS)
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proc_open_CPPFLAGS= -DDEBUG_PROC_OPEN
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#gen_license_SOURCES = license.c md5.c buffer.c gen_license.c
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#ssl_SOURCES = ssl.c
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#adserver_SOURCES = buffer.c iframe.c
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#adserver_LDADD = -lfcgi -lmysqlclient
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#error_test_SOURCES = error_test.c
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#evalo_SOURCES = buffer.c eval.c
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#bench_SOURCES = buffer.c bench.c
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#ajp_SOURCES = ajp.c
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noinst_HEADERS = $(hdr)
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EXTRA_DIST = \
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mod_skeleton.c \
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@ -8,7 +8,7 @@ Import('env')
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def GatherLibs(env, *libs):
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return env['LIBS'] + [libs] + [env['APPEND_LIBS']]
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common_src = Split("buffer.c log.c \
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common_src = Split("base64.c buffer.c log.c \
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keyvalue.c chunk.c \
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http_chunk.c stream.c fdevent.c \
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stat_cache.c plugin.c joblist.c etag.c array.c \
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@ -0,0 +1,233 @@
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#include "base64.h"
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/* reverse mapping:
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* >= 0: base64 value
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* -1: invalid character
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* -2: skip character (whitespace/control)
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* -3: padding
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*/
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/* BASE64_STANDARD: "A-Z a-z 0-9 + /" maps to 0-63, pad with "=" */
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static const char base64_standard_table[66] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
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static const short base64_standard_reverse_table[128] = {
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/* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
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-1, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, /* 0x00 - 0x0F */
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-2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, /* 0x10 - 0x1F */
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-2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63, /* 0x20 - 0x2F */
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52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -3, -1, -1, /* 0x30 - 0x3F */
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-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, /* 0x40 - 0x4F */
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15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, /* 0x50 - 0x5F */
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-1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, /* 0x60 - 0x6F */
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41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1, /* 0x70 - 0x7F */
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};
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/* BASE64_URL: "A-Z a-z 0-9 - _" maps to 0-63, pad with "." */
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static const char base64_url_table[66] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_.";
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static const short base64_url_reverse_table[128] = {
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/* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
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-1, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, /* 0x00 - 0x0F */
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-2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, /* 0x10 - 0x1F */
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-2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -3, -1, /* 0x20 - 0x2F */
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52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, /* 0x30 - 0x3F */
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-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, /* 0x40 - 0x4F */
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15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, 63, /* 0x50 - 0x5F */
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-1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, /* 0x60 - 0x6F */
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41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1, /* 0x70 - 0x7F */
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};
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unsigned char* buffer_append_base64_decode(buffer *out, const char* in, size_t in_length, base64_charset charset) {
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unsigned char *result;
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size_t out_pos = 0; /* current output character (position) that is decoded. can contain partial result */
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unsigned int group = 0; /* how many base64 digits in the current group were decoded already. each group has up to 4 digits */
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size_t i;
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const short* base64_reverse_table;
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switch (charset) {
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case BASE64_STANDARD:
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base64_reverse_table = base64_standard_reverse_table;
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break;
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case BASE64_URL:
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base64_reverse_table = base64_url_reverse_table;
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break;
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default:
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return NULL;
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}
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result = (unsigned char *) buffer_string_prepare_append(out, 3*(in_length / 4) + 3);
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/* run through the whole string, converting as we go */
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for (i = 0; i < in_length; i++) {
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unsigned char c = (unsigned char) in[i];
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short ch;
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if (c == '\0') break;
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if (c >= 128) return NULL; /* only 7-bit characters allowed */
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ch = base64_reverse_table[c];
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if (-3 == ch) {
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/* pad character; can only come after 2 base64 digits in a group */
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if (group < 2) return NULL;
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break;
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} else if (-2 == ch) {
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continue; /* skip character */
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} else if (ch < 0) {
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return NULL; /* invalid character, abort */
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}
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switch(group) {
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case 0:
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result[out_pos] = ch << 2;
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group = 1;
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break;
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case 1:
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result[out_pos++] |= ch >> 4;
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result[out_pos] = (ch & 0x0f) << 4;
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group = 2;
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break;
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case 2:
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result[out_pos++] |= ch >>2;
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result[out_pos] = (ch & 0x03) << 6;
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group = 3;
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break;
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case 3:
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result[out_pos++] |= ch;
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group = 0;
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break;
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}
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}
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switch(group) {
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case 0:
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/* ended on boundary */
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break;
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case 1:
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/* need at least 2 base64 digits per group */
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return NULL;
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case 2:
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/* have 2 base64 digits in last group => one real octect, two zeroes padded */
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case 3:
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/* have 3 base64 digits in last group => two real octects, one zero padded */
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/* for both cases the current index already is on the first zero padded octet
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* - check it really is zero (overlapping bits) */
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if (0 != result[out_pos]) return NULL;
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break;
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}
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buffer_commit(out, out_pos);
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return result;
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}
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size_t li_to_base64_no_padding(char* out, size_t out_length, const unsigned char* in, size_t in_length, base64_charset charset) {
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const size_t full_tuples = in_length / 3;
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const size_t in_tuple_remainder = in_length % 3;
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const size_t out_tuple_remainder = in_tuple_remainder ? 1 + in_tuple_remainder : 0;
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const size_t require_space = 4 * full_tuples + out_tuple_remainder;
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const char* base64_table;
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size_t i;
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size_t out_pos = 0;
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switch (charset) {
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case BASE64_STANDARD:
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base64_table = base64_standard_table;
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break;
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case BASE64_URL:
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base64_table = base64_url_table;
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break;
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default:
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force_assert(0 && "invalid charset");
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}
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/* check overflows */
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force_assert(full_tuples < 2*full_tuples);
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force_assert(full_tuples < 4*full_tuples);
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force_assert(4*full_tuples < 4*full_tuples + out_tuple_remainder);
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force_assert(require_space <= out_length);
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for (i = 2; i < in_length; i += 3) {
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unsigned int v = (in[i-2] << 16) | (in[i-1] << 8) | in[i];
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out[out_pos+3] = base64_table[v & 0x3f]; v >>= 6;
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out[out_pos+2] = base64_table[v & 0x3f]; v >>= 6;
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out[out_pos+1] = base64_table[v & 0x3f]; v >>= 6;
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out[out_pos+0] = base64_table[v & 0x3f];
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out_pos += 4;
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}
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switch (in_tuple_remainder) {
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case 0:
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break;
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case 1:
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{
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/* pretend in[i-1] = in[i] = 0, don't write last two (out_pos+3, out_pos+2) characters */
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unsigned int v = (in[i-2] << 4);
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out[out_pos+1] = base64_table[v & 0x3f]; v >>= 6;
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out[out_pos+0] = base64_table[v & 0x3f];
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out_pos += 2;
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}
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break;
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case 2:
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{
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/* pretend in[i] = 0, don't write last (out_pos+3) character */
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unsigned int v = (in[i-2] << 10) | (in[i-1] << 2);
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out[out_pos+2] = base64_table[v & 0x3f]; v >>= 6;
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out[out_pos+1] = base64_table[v & 0x3f]; v >>= 6;
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out[out_pos+0] = base64_table[v & 0x3f];
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out_pos += 3;
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}
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break;
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}
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force_assert(out_pos <= out_length);
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return out_pos;
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}
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size_t li_to_base64(char* out, size_t out_length, const unsigned char* in, size_t in_length, base64_charset charset) {
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const size_t in_tuple_remainder = in_length % 3;
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size_t padding_length = in_tuple_remainder ? 3 - in_tuple_remainder : 0;
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char padding;
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size_t out_pos;
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switch (charset) {
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case BASE64_STANDARD:
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padding = base64_standard_table[64];
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break;
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case BASE64_URL:
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padding = base64_url_table[64];
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break;
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default:
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force_assert(0 && "invalid charset");
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}
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force_assert(out_length >= padding_length);
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out_pos = li_to_base64_no_padding(out, out_length - padding_length, in, in_length, charset);
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while (padding_length > 0) {
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out[out_pos++] = padding;
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padding_length--;
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}
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force_assert(out_pos <= out_length);
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return out_pos;
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}
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char* buffer_append_base64_encode_no_padding(buffer *out, const unsigned char* in, size_t in_length, base64_charset charset) {
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size_t reserve = 4*(in_length/3) + 4;
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char* result = buffer_string_prepare_append(out, reserve);
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size_t out_pos = li_to_base64_no_padding(result, reserve, in, in_length, charset);
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buffer_commit(out, out_pos);
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return result;
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}
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char* buffer_append_base64_encode(buffer *out, const unsigned char* in, size_t in_length, base64_charset charset) {
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size_t reserve = 4*(in_length/3) + 4;
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char* result = buffer_string_prepare_append(out, reserve);
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size_t out_pos = li_to_base64(result, reserve, in, in_length, charset);
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buffer_commit(out, out_pos);
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return result;
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}
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@ -0,0 +1,19 @@
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#ifndef _BASE64_H_
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#define _BASE64_H_
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#include "buffer.h"
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typedef enum {
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BASE64_STANDARD,
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BASE64_URL,
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} base64_charset;
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unsigned char* buffer_append_base64_decode(buffer *out, const char* in, size_t in_length, base64_charset charset);
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size_t li_to_base64_no_padding(char* out, size_t out_length, const unsigned char* in, size_t in_length, base64_charset charset);
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size_t li_to_base64(char* out, size_t out_length, const unsigned char* in, size_t in_length, base64_charset charset);
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char* buffer_append_base64_encode_no_padding(buffer *out, const unsigned char* in, size_t in_length, base64_charset charset);
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char* buffer_append_base64_encode(buffer *out, const unsigned char* in, size_t in_length, base64_charset charset);
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#endif
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125
src/http_auth.c
125
src/http_auth.c
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@ -3,6 +3,7 @@
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#include "http_auth.h"
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#include "inet_ntop_cache.h"
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#include "stream.h"
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#include "base64.h"
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#ifdef HAVE_CRYPT_H
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# include <crypt.h>
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@ -62,101 +63,6 @@ static void CvtHex(const HASH Bin, char Hex[33]) {
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handler_t auth_ldap_init(server *srv, mod_auth_plugin_config *s);
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static const char base64_pad = '=';
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/* "A-Z a-z 0-9 + /" maps to 0-63 */
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static const short base64_reverse_table[256] = {
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/* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x00 - 0x0F */
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x10 - 0x1F */
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63, /* 0x20 - 0x2F */
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52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, /* 0x30 - 0x3F */
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-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, /* 0x40 - 0x4F */
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15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, /* 0x50 - 0x5F */
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-1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, /* 0x60 - 0x6F */
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41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1, /* 0x70 - 0x7F */
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x80 - 0x8F */
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x90 - 0x9F */
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xA0 - 0xAF */
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xB0 - 0xBF */
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xC0 - 0xCF */
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xD0 - 0xDF */
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xE0 - 0xEF */
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xF0 - 0xFF */
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};
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static unsigned char * base64_decode(buffer *out, const char *in) {
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unsigned char *result;
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unsigned int j = 0; /* current output character (position) that is decoded. can contain partial result */
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unsigned int group = 0; /* how many base64 digits in the current group were decoded already. each group has up to 4 digits */
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size_t i;
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size_t in_len = strlen(in);
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result = (unsigned char *) buffer_string_prepare_copy(out, in_len);
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/* run through the whole string, converting as we go */
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for (i = 0; i < in_len; i++) {
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unsigned char c = (unsigned char) in[i];
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short ch;
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if (c == '\0') break;
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||||
|
||||
if (c == base64_pad) {
|
||||
/* pad character can only come after 2 base64 digits in a group */
|
||||
if (group < 2) return NULL;
|
||||
break;
|
||||
}
|
||||
|
||||
ch = base64_reverse_table[c];
|
||||
if (ch < 0) continue; /* skip invalid characters */
|
||||
|
||||
switch(group) {
|
||||
case 0:
|
||||
result[j] = ch << 2;
|
||||
group = 1;
|
||||
break;
|
||||
case 1:
|
||||
result[j++] |= ch >> 4;
|
||||
result[j] = (ch & 0x0f) << 4;
|
||||
group = 2;
|
||||
break;
|
||||
case 2:
|
||||
result[j++] |= ch >>2;
|
||||
result[j] = (ch & 0x03) << 6;
|
||||
group = 3;
|
||||
break;
|
||||
case 3:
|
||||
result[j++] |= ch;
|
||||
group = 0;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
switch(group) {
|
||||
case 0:
|
||||
/* ended on boundary */
|
||||
break;
|
||||
case 1:
|
||||
/* need at least 2 base64 digits per group */
|
||||
return NULL;
|
||||
case 2:
|
||||
/* have 2 base64 digits in last group => one real octect, two zeroes padded */
|
||||
case 3:
|
||||
/* have 3 base64 digits in last group => two real octects, one zero padded */
|
||||
|
||||
/* for both cases the current index already is on the first zero padded octet
|
||||
* - check it really is zero (overlapping bits) */
|
||||
if (0 != result[j]) return NULL;
|
||||
break;
|
||||
}
|
||||
|
||||
buffer_commit(out, j);
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
static int http_auth_get_password(server *srv, mod_auth_plugin_data *p, buffer *username, buffer *realm, buffer *password) {
|
||||
int ret = -1;
|
||||
|
||||
|
|
@ -596,31 +502,20 @@ static void apr_md5_encode(const char *pw, const char *salt, char *result, size_
|
|||
|
||||
#ifdef USE_OPENSSL
|
||||
static void apr_sha_encode(const char *pw, char *result, size_t nbytes) {
|
||||
static const unsigned char base64_data[65] =
|
||||
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
|
||||
unsigned char digest[21]; /* multiple of 3 for base64 encoding */
|
||||
int i;
|
||||
unsigned char digest[20];
|
||||
size_t base64_written;
|
||||
|
||||
SHA1((const unsigned char*) pw, strlen(pw), digest);
|
||||
|
||||
memset(result, 0, nbytes);
|
||||
|
||||
/* need 5 bytes for "{SHA}", 28 for base64 (3 bytes -> 4 bytes) of SHA1 (20 bytes), 1 terminating */
|
||||
if (nbytes < 5 + 28 + 1) return;
|
||||
|
||||
SHA1((const unsigned char*) pw, strlen(pw), digest);
|
||||
digest[20] = 0;
|
||||
|
||||
strcpy(result, "{SHA}");
|
||||
result = result + 5;
|
||||
for (i = 0; i < 21; i += 3) {
|
||||
unsigned int v = (digest[i] << 16) | (digest[i+1] << 8) | digest[i+2];
|
||||
result[3] = base64_data[v & 0x3f]; v >>= 6;
|
||||
result[2] = base64_data[v & 0x3f]; v >>= 6;
|
||||
result[1] = base64_data[v & 0x3f]; v >>= 6;
|
||||
result[0] = base64_data[v & 0x3f];
|
||||
result += 4;
|
||||
}
|
||||
result[-1] = '='; /* last digest character was already end of string, pad it */
|
||||
*result = '\0';
|
||||
memcpy(result, "{SHA}", 5);
|
||||
base64_written = li_to_base64(result + 5, nbytes - 5, digest, 20, BASE64_STANDARD);
|
||||
force_assert(base64_written == 28);
|
||||
result[5 + base64_written] = '\0'; /* terminate string */
|
||||
}
|
||||
#endif
|
||||
|
||||
|
|
@ -852,7 +747,7 @@ int http_auth_basic_check(server *srv, connection *con, mod_auth_plugin_data *p,
|
|||
|
||||
username = buffer_init();
|
||||
|
||||
if (!base64_decode(username, realm_str)) {
|
||||
if (!buffer_append_base64_decode(username, realm_str, strlen(realm_str), BASE64_STANDARD)) {
|
||||
log_error_write(srv, __FILE__, __LINE__, "sb", "decodeing base64-string failed", username);
|
||||
|
||||
buffer_free(username);
|
||||
|
|
|
|||
Loading…
Reference in New Issue