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Do not support bad whitespace in chunk extensions

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This commit is contained in:
Demi Marie Obenour 2025-06-10 15:19:20 -04:00
parent 9950dfbc94
commit 9b8e4a1937
1 changed files with 5 additions and 40 deletions
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45
src/http/ngx_http_parse.c
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@ -2259,7 +2259,6 @@ ngx_http_parse_chunked(ngx_http_request_t *r, ngx_buf_t *b,
sw_chunk_size,
sw_chunk_extension_before_semi,
sw_chunk_extension,
sw_chunk_extension_bws_before_equal,
sw_chunk_extension_name,
sw_chunk_extension_value_start,
sw_chunk_extension_quoted_value,
@ -2332,14 +2331,6 @@ before_semi:
case ';':
state = sw_chunk_extension;
break;
case ' ':
case '\t':
/*
* This switch is also used by other states, so set
* the state explicitly here.
*/
state = sw_chunk_extension_before_semi;
break; /* BWS */
default:
goto invalid;
}
@ -2350,53 +2341,28 @@ before_semi:
state = sw_chunk_extension_name;
break;
}
switch (ch) {
case ' ':
case '\t':
break; /* BWS */
default:
goto invalid;
}
break;
goto invalid;
case sw_chunk_extension_name:
if (ngx_http_token_char(ch)) {
break;
}
state = sw_chunk_extension_bws_before_equal;
/* fall through */
case sw_chunk_extension_bws_before_equal:
switch (ch) {
case ' ':
case '\t':
break; /* BWS */
case '=':
if (ch == '=') {
state = sw_chunk_extension_value_start;
break;
default:
goto invalid;
}
break;
goto invalid;
case sw_chunk_extension_value_start:
if (ngx_http_token_char(ch)) {
state = sw_chunk_extension_unquoted_value;
break;
}
switch (ch) {
case ' ':
case '\t':
break; /* BWS */
case '"':
if (ch == '"') {
state = sw_chunk_extension_quoted_value;
break;
default:
goto invalid;
}
break;
goto invalid;
case sw_chunk_extension_quoted_value:
if (ch == '"') {
@ -2550,7 +2516,6 @@ data:
case sw_chunk_extension:
ctx->length = 5 /* a=b CR LF */ + min_length;
break;
case sw_chunk_extension_bws_before_equal:
case sw_chunk_extension_name:
ctx->length = 4 /* =b CR LF */ + min_length;
break;