mirror of
https://github.com/mozilla/cipherscan.git
synced 2024-11-22 06:13:42 +01:00
parse_CAs.c - implement error checking, remove magic numbers, compile fix
This commit is contained in:
Hubert Kario
parent
aac3e9a9db
commit
5a6eaaac41
@ -18,6 +18,23 @@
|
||||
#include <openssl/err.h>
|
||||
#include <json-c/json.h>
|
||||
|
||||
#define MAX(a,b) \
|
||||
({ __typeof__ (a) _a = (a); \
|
||||
__typeof__ (b) _b = (b); \
|
||||
_a > _b ? _a : _b; })
|
||||
|
||||
#ifndef X509_V_FLAG_TRUSTED_FIRST
|
||||
/*
|
||||
* OpenSSL implements the same chain building logic as does NSS but it doesn't
|
||||
* use it by default, it's also not available in stock 1.0.1 but is backported
|
||||
* for example on Fedora
|
||||
*/
|
||||
#warning "X509_V_FLAG_TRUSTED_FIRST not available, chain creation will be unreliable"
|
||||
#define X509_V_FLAG_TRUSTED_FIRST 0
|
||||
#endif
|
||||
|
||||
#define MAX_BUFFER_SIZE 8192
|
||||
|
||||
static char* CA_TRUSTED = "./ca_trusted";
|
||||
static char* CA_ALL = "./ca_files";
|
||||
static char* CERTS_DIR = "./certs";
|
||||
@ -51,20 +68,33 @@ char *hash_to_filename(const char *hash)
|
||||
{
|
||||
char *tmp_f_name;
|
||||
size_t n;
|
||||
int ret;
|
||||
|
||||
n = strlen(hash) + 30;
|
||||
n = strlen(hash) + MAX(MAX(strlen(CA_TRUSTED), strlen(CA_ALL)),
|
||||
strlen(CERTS_DIR)) + 1 + // slash in name
|
||||
strlen(".pem") + 1;
|
||||
|
||||
// TODO error checking
|
||||
tmp_f_name = malloc(n);
|
||||
if (!tmp_f_name) {
|
||||
fprintf(stderr, "Out of memory (line %i)\n", __LINE__);
|
||||
abort();
|
||||
}
|
||||
|
||||
/* first check if the file is in directory with regular certs */
|
||||
// TODO error checking
|
||||
snprintf(tmp_f_name, n, "%s/%s.pem", CERTS_DIR, hash);
|
||||
ret = snprintf(tmp_f_name, n, "%s/%s.pem", CERTS_DIR, hash);
|
||||
if (ret >= n) {
|
||||
fprintf(stderr, "Out of buffer space (line %i)\n", __LINE__);
|
||||
abort();
|
||||
}
|
||||
if (access(tmp_f_name, F_OK) != -1) {
|
||||
return tmp_f_name;
|
||||
}
|
||||
|
||||
snprintf(tmp_f_name, n, "%s/%s.pem", CA_ALL, hash);
|
||||
ret = snprintf(tmp_f_name, n, "%s/%s.pem", CA_ALL, hash);
|
||||
if (ret >= n) {
|
||||
fprintf(stderr, "Out of buffer space (line %i)\n", __LINE__);
|
||||
abort();
|
||||
}
|
||||
if (access(tmp_f_name, F_OK) != -1) {
|
||||
return tmp_f_name;
|
||||
}
|
||||
@ -294,7 +324,10 @@ int register_known_chains(struct json_object ***known, struct json_object *new)
|
||||
|
||||
// add it to known objects
|
||||
*known = realloc(*known, sizeof(struct json_object **)*(i+2));
|
||||
// TODO handle errors
|
||||
if (!*known) {
|
||||
fprintf(stderr, "Out of memory (line %i)\n", __LINE__);
|
||||
abort();
|
||||
}
|
||||
(*known)[i] = new;
|
||||
(*known)[i+1] = NULL;
|
||||
return 0;
|
||||
@ -307,7 +340,7 @@ struct json_object *read_json_from_file(char *filename)
|
||||
struct json_object *obj = NULL;
|
||||
int ret = 0;
|
||||
int rc;
|
||||
size_t len = 8192;
|
||||
size_t len = MAX_BUFFER_SIZE;
|
||||
char buffer[len];
|
||||
char *start;
|
||||
int i;
|
||||
@ -343,7 +376,6 @@ struct json_object *read_json_from_file(char *filename)
|
||||
}
|
||||
|
||||
tok_free:
|
||||
|
||||
json_tokener_free(tok);
|
||||
|
||||
close_fd:
|
||||
@ -400,7 +432,9 @@ int process_host_results(char *filename)
|
||||
int first_printed=0;
|
||||
for(int i=0; i < json_object_array_length(ciphers); i++) {
|
||||
current = json_object_array_get_idx(ciphers, i);
|
||||
//printf("\t[%i]:\n", i);
|
||||
#ifdef DEBUG
|
||||
printf("\t[%i]:\n", i);
|
||||
#endif
|
||||
j_rc = json_object_object_get_ex(current, "certificates", &certificates);
|
||||
if (j_rc == FALSE)
|
||||
continue;
|
||||
@ -410,10 +444,14 @@ int process_host_results(char *filename)
|
||||
int j;
|
||||
for (j=0; j < json_object_array_length(certificates); j++) {
|
||||
certs[j] = json_object_get_string(json_object_array_get_idx(certificates, j));
|
||||
//printf("\t\t\t%s\n", certs[j]);
|
||||
#ifdef DEBUG
|
||||
printf("\t\t\t%s\n", certs[j]);
|
||||
#endif
|
||||
}
|
||||
rc = register_known_chains(&known_chains, certificates);
|
||||
//printf("\t\t%i\n", rc);
|
||||
#ifdef DEBUG
|
||||
printf("\t\t%i\n", rc);
|
||||
#endif
|
||||
|
||||
if (rc == 0 && j > 0) {
|
||||
if (first_printed != 0)
|
||||
@ -425,11 +463,13 @@ int process_host_results(char *filename)
|
||||
}
|
||||
}
|
||||
|
||||
// DEBUG, print whole json "object" object
|
||||
//json_object_object_foreach(current, key, val) {
|
||||
// str = json_object_to_json_string(val);
|
||||
// printf("\t\t%s: %s\n", key, str);
|
||||
//}
|
||||
#ifdef DEBUG
|
||||
// print whole json "object" object
|
||||
json_object_object_foreach(current, key, val) {
|
||||
str = json_object_to_json_string(val);
|
||||
printf("\t\t%s: %s\n", key, str);
|
||||
}
|
||||
#endif
|
||||
|
||||
free(certs);
|
||||
}
|
||||
@ -450,7 +490,7 @@ int main(int argc, char** argv)
|
||||
DIR *dirp;
|
||||
struct dirent *direntp;
|
||||
|
||||
char buffer[8192] = {};
|
||||
char buffer[MAX_BUFFER_SIZE] = {};
|
||||
|
||||
SSL_load_error_strings();
|
||||
SSL_library_init();
|
||||
@ -488,7 +528,11 @@ int main(int argc, char** argv)
|
||||
if (strcmp(direntp->d_name, "..") == 0)
|
||||
continue;
|
||||
|
||||
snprintf(buffer, 8191, "results/%s", direntp->d_name);
|
||||
ret = snprintf(buffer, MAX_BUFFER_SIZE-1, "results/%s", direntp->d_name);
|
||||
if (ret >= MAX_BUFFER_SIZE-1) {
|
||||
fprintf(stderr, "Out of buffer space (line %i)\n", __LINE__);
|
||||
abort();
|
||||
}
|
||||
|
||||
ret = process_host_results(buffer);
|
||||
if (ret == 1) {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user