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Improved boundary checking

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Signed-off-by: tyrolyean <tyrolyean@tyrolyean.net>
This commit is contained in:
tyrolyean 2020-05-01 01:45:51 +02:00
parent 5f898f4e49
commit 418eee6c4f
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GPG key ID: EDD105663B707C62
1 changed files with 27 additions and 6 deletions
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33
src/tools.c
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@ -158,16 +158,37 @@ char* get_value_equals(char* content_type, size_t content_len,
*boundary_len = 0;
return NULL;
}
#define STATE_INIT 0
#define STATE_EQUALS 1
#define STATE_ALNUM 2
#define STATE_QUOTE 3
size_t state = STATE_INIT;
for(size_t i = boundary_offset; i < content_len;i++){
if(content_type[i] == '"' && boundary_begin == NULL){
boundary_begin = &content_type[i+1];
}else if(content_type[i] == '"'){
*boundary_len = &content_type[i] - boundary_begin ;
return boundary_begin;
if(state == STATE_INIT && content_type[i] == '='){
state = STATE_EQUALS;
}else if(state == STATE_EQUALS && !isspace(content_type[i])){
if(content_type[i] == '"' && boundary_begin == NULL){
boundary_begin = &content_type[++i];
state = STATE_QUOTE;
}else {
boundary_begin = &content_type[i];
state = STATE_ALNUM;
}
}else if(state == STATE_ALNUM){
if(isspace(content_type[i])){
*boundary_len = &content_type[i] -
boundary_begin ;
return boundary_begin;
}
}else if(state == STATE_QUOTE && content_type[i] == '"'){
*boundary_len = &content_type[i] -
boundary_begin ;
return boundary_begin;
}
}
*boundary_len = 0;
return NULL;
}