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cli/vendor/aws-lc-sys/aws-lc/crypto/x509/by_dir.c

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// Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) All rights reserved.
// SPDX-License-Identifier: Apache-2.0
#include <inttypes.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <openssl/buf.h>
#include <openssl/err.h>
#include <openssl/mem.h>
#include <openssl/thread.h>
#include <openssl/x509.h>
#include "../internal.h"
#include "internal.h"
typedef struct lookup_dir_hashes_st {
uint32_t hash;
int suffix;
} BY_DIR_HASH;
typedef struct lookup_dir_entry_st {
CRYPTO_MUTEX lock;
char *dir;
int dir_type;
STACK_OF(BY_DIR_HASH) *hashes;
} BY_DIR_ENTRY;
typedef struct lookup_dir_st {
STACK_OF(BY_DIR_ENTRY) *dirs;
} BY_DIR;
DEFINE_STACK_OF(BY_DIR_HASH)
DEFINE_STACK_OF(BY_DIR_ENTRY)
static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
char **ret);
static int new_dir(X509_LOOKUP *lu);
static void free_dir(X509_LOOKUP *lu);
static int add_cert_dir(BY_DIR *ctx, const char *dir, int type);
static int get_cert_by_subject(X509_LOOKUP *xl, int type, X509_NAME *name,
X509_OBJECT *ret);
static const X509_LOOKUP_METHOD x509_dir_lookup = {
new_dir, // new
free_dir, // free
dir_ctrl, // ctrl
get_cert_by_subject, // get_by_subject
};
const X509_LOOKUP_METHOD *X509_LOOKUP_hash_dir(void) {
return &x509_dir_lookup;
}
static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
char **retp) {
int ret = 0;
char *dir = NULL;
BY_DIR *ld = ctx->method_data;
switch (cmd) {
case X509_L_ADD_DIR:
if (argl == X509_FILETYPE_DEFAULT) {
dir = (char *)getenv(X509_get_default_cert_dir_env());
if (dir) {
ret = add_cert_dir(ld, dir, X509_FILETYPE_PEM);
} else {
ret =
add_cert_dir(ld, X509_get_default_cert_dir(), X509_FILETYPE_PEM);
}
if (!ret) {
OPENSSL_PUT_ERROR(X509, X509_R_LOADING_CERT_DIR);
}
} else {
ret = add_cert_dir(ld, argp, (int)argl);
}
break;
}
return ret;
}
static int new_dir(X509_LOOKUP *lu) {
BY_DIR *a;
if ((a = (BY_DIR *)OPENSSL_malloc(sizeof(BY_DIR))) == NULL) {
return 0;
}
a->dirs = NULL;
lu->method_data = a;
return 1;
}
static void by_dir_hash_free(BY_DIR_HASH *hash) { OPENSSL_free(hash); }
static int by_dir_hash_cmp(const BY_DIR_HASH *const *a,
const BY_DIR_HASH *const *b) {
if ((*a)->hash > (*b)->hash) {
return 1;
}
if ((*a)->hash < (*b)->hash) {
return -1;
}
return 0;
}
static void by_dir_entry_free(BY_DIR_ENTRY *ent) {
if (ent != NULL) {
CRYPTO_MUTEX_cleanup(&ent->lock);
OPENSSL_free(ent->dir);
sk_BY_DIR_HASH_pop_free(ent->hashes, by_dir_hash_free);
OPENSSL_free(ent);
}
}
static void free_dir(X509_LOOKUP *lu) {
BY_DIR *a = lu->method_data;
if (a != NULL) {
sk_BY_DIR_ENTRY_pop_free(a->dirs, by_dir_entry_free);
OPENSSL_free(a);
}
}
static int add_cert_dir(BY_DIR *ctx, const char *dir, int type) {
size_t j, len;
const char *s, *ss, *p;
if (dir == NULL || !*dir) {
OPENSSL_PUT_ERROR(X509, X509_R_INVALID_DIRECTORY);
return 0;
}
s = dir;
p = s;
do {
if ((*p == ':') || (*p == '\0')) {
BY_DIR_ENTRY *ent;
ss = s;
s = p + 1;
len = p - ss;
if (len == 0) {
continue;
}
for (j = 0; j < sk_BY_DIR_ENTRY_num(ctx->dirs); j++) {
ent = sk_BY_DIR_ENTRY_value(ctx->dirs, j);
if (strlen(ent->dir) == len && strncmp(ent->dir, ss, len) == 0) {
break;
}
}
if (j < sk_BY_DIR_ENTRY_num(ctx->dirs)) {
continue;
}
if (ctx->dirs == NULL) {
ctx->dirs = sk_BY_DIR_ENTRY_new_null();
if (!ctx->dirs) {
return 0;
}
}
ent = OPENSSL_malloc(sizeof(BY_DIR_ENTRY));
if (!ent) {
return 0;
}
CRYPTO_MUTEX_init(&ent->lock);
ent->dir_type = type;
ent->hashes = sk_BY_DIR_HASH_new(by_dir_hash_cmp);
ent->dir = OPENSSL_strndup(ss, len);
if (ent->dir == NULL || ent->hashes == NULL ||
!sk_BY_DIR_ENTRY_push(ctx->dirs, ent)) {
by_dir_entry_free(ent);
return 0;
}
}
} while (*p++ != '\0');
return 1;
}
static int get_cert_by_subject(X509_LOOKUP *xl, int type, X509_NAME *name,
X509_OBJECT *ret) {
union {
struct {
X509 st_x509;
X509_CINF st_x509_cinf;
} x509;
struct {
X509_CRL st_crl;
X509_CRL_INFO st_crl_info;
} crl;
} data;
int ok = 0;
size_t i;
int j, k;
uint32_t h;
uint32_t hash_array[2];
int hash_index;
BUF_MEM *b = NULL;
X509_OBJECT stmp, *tmp;
const char *postfix;
if (name == NULL) {
return 0;
}
stmp.type = type;
if (type == X509_LU_X509) {
data.x509.st_x509.cert_info = &data.x509.st_x509_cinf;
data.x509.st_x509_cinf.subject = name;
stmp.data.x509 = &data.x509.st_x509;
postfix = "";
} else if (type == X509_LU_CRL) {
data.crl.st_crl.crl = &data.crl.st_crl_info;
data.crl.st_crl_info.issuer = name;
stmp.data.crl = &data.crl.st_crl;
postfix = "r";
} else {
OPENSSL_PUT_ERROR(X509, X509_R_WRONG_LOOKUP_TYPE);
goto finish;
}
if ((b = BUF_MEM_new()) == NULL) {
OPENSSL_PUT_ERROR(X509, ERR_R_BUF_LIB);
goto finish;
}
BY_DIR *ctx = xl->method_data;
hash_array[0] = X509_NAME_hash(name);
hash_array[1] = X509_NAME_hash_old(name);
for (hash_index = 0; hash_index < 2; ++hash_index) {
h = hash_array[hash_index];
for (i = 0; i < sk_BY_DIR_ENTRY_num(ctx->dirs); i++) {
BY_DIR_ENTRY *ent;
size_t idx;
BY_DIR_HASH htmp, *hent;
ent = sk_BY_DIR_ENTRY_value(ctx->dirs, i);
j = strlen(ent->dir) + 1 + 8 + 6 + 1 + 1;
if (!BUF_MEM_grow(b, j)) {
goto finish;
}
if (type == X509_LU_CRL && ent->hashes) {
htmp.hash = h;
CRYPTO_MUTEX_lock_read(&ent->lock);
if (sk_BY_DIR_HASH_find_awslc(ent->hashes, &idx, &htmp)) {
hent = sk_BY_DIR_HASH_value(ent->hashes, idx);
k = hent->suffix;
} else {
hent = NULL;
k = 0;
}
CRYPTO_MUTEX_unlock_read(&ent->lock);
} else {
k = 0;
hent = NULL;
}
for (;;) {
snprintf(b->data, b->max, "%s/%08" PRIx32 ".%s%d", ent->dir, h, postfix,
k);
if (type == X509_LU_X509) {
if ((X509_load_cert_file(xl, b->data, ent->dir_type)) == 0) {
// Don't expose the lower level error, All of these boil
// down to "we could not find a CA".
ERR_clear_error();
break;
}
} else if (type == X509_LU_CRL) {
if ((X509_load_crl_file(xl, b->data, ent->dir_type)) == 0) {
// Don't expose the lower level error, All of these boil
// down to "we could not find a CRL".
ERR_clear_error();
break;
}
}
// The lack of a CA or CRL will be caught higher up
k++;
}
// we have added it to the cache so now pull it out again
CRYPTO_MUTEX_lock_write(&xl->store_ctx->objs_lock);
tmp = NULL;
sk_X509_OBJECT_sort(xl->store_ctx->objs);
if (sk_X509_OBJECT_find_awslc(xl->store_ctx->objs, &idx, &stmp)) {
tmp = sk_X509_OBJECT_value(xl->store_ctx->objs, idx);
}
CRYPTO_MUTEX_unlock_write(&xl->store_ctx->objs_lock);
// If a CRL, update the last file suffix added for this
if (type == X509_LU_CRL) {
CRYPTO_MUTEX_lock_write(&ent->lock);
// Look for entry again in case another thread added an entry
// first.
if (!hent) {
htmp.hash = h;
sk_BY_DIR_HASH_sort(ent->hashes);
if (sk_BY_DIR_HASH_find_awslc(ent->hashes, &idx, &htmp)) {
hent = sk_BY_DIR_HASH_value(ent->hashes, idx);
}
}
if (!hent) {
hent = OPENSSL_malloc(sizeof(BY_DIR_HASH));
if (hent == NULL) {
CRYPTO_MUTEX_unlock_write(&ent->lock);
ok = 0;
goto finish;
}
hent->hash = h;
hent->suffix = k;
if (!sk_BY_DIR_HASH_push(ent->hashes, hent)) {
CRYPTO_MUTEX_unlock_write(&ent->lock);
OPENSSL_free(hent);
ok = 0;
goto finish;
}
sk_BY_DIR_HASH_sort(ent->hashes);
} else if (hent->suffix < k) {
hent->suffix = k;
}
CRYPTO_MUTEX_unlock_write(&ent->lock);
}
if (tmp != NULL) {
ok = 1;
ret->type = tmp->type;
OPENSSL_memcpy(&ret->data, &tmp->data, sizeof(ret->data));
// Clear any errors that might have been raised processing empty
// or malformed files.
ERR_clear_error();
// If we were going to up the reference count, we would need
// to do it on a perl 'type' basis
goto finish;
}
}
}
finish:
BUF_MEM_free(b);
return ok;
}
int X509_LOOKUP_add_dir(X509_LOOKUP *lookup, const char *name, int type) {
return X509_LOOKUP_ctrl(lookup, X509_L_ADD_DIR, name, type, NULL);
}
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