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e_loader_attic.c
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/*
* Copyright 2016-2025 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
/* THIS ENGINE IS FOR TESTING PURPOSES ONLY. */
/* This file has quite some overlap with providers/implementations/storemgmt/file_store.c */
/* We need to use some engine deprecated APIs */
#define OPENSSL_SUPPRESS_DEPRECATED
#include "internal/e_os.h" /* for stat */
#include <string.h>
#include <sys/stat.h>
#include <ctype.h>
#include <assert.h>
#include <openssl/bio.h>
#include <openssl/dsa.h> /* For d2i_DSAPrivateKey */
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/pem.h>
#include <openssl/pkcs12.h> /* For the PKCS8 stuff o.O */
#include <openssl/rsa.h> /* For d2i_RSAPrivateKey */
#include <openssl/safestack.h>
#include <openssl/store.h>
#include <openssl/ui.h>
#include <openssl/engine.h>
#include <openssl/x509.h> /* For the PKCS8 stuff o.O */
#include "internal/asn1.h" /* For asn1_d2i_read_bio */
#include "internal/o_dir.h"
#include "internal/cryptlib.h"
#include "crypto/ctype.h" /* For ossl_isdigit */
#include "crypto/pem.h" /* For PVK and "blob" PEM headers */
#include "e_loader_attic_err.c"
DEFINE_STACK_OF(OSSL_STORE_INFO)
#ifndef S_ISDIR
# define S_ISDIR(a) (((a) & S_IFMT) == S_IFDIR)
#endif
/*-
* Password prompting
* ------------------
*/
static char *file_get_pass(const UI_METHOD *ui_method, char *pass,
size_t maxsize, const char *desc, const char *info,
void *data)
{
UI *ui = UI_new();
char *prompt = NULL;
if (ui == NULL) {
ATTICerr(0, ERR_R_UI_LIB);
return NULL;
}
if (ui_method != NULL)
UI_set_method(ui, ui_method);
UI_add_user_data(ui, data);
if ((prompt = UI_construct_prompt(ui, desc, info)) == NULL) {
ATTICerr(0, ERR_R_UI_LIB);
pass = NULL;
} else if (UI_add_input_string(ui, prompt, UI_INPUT_FLAG_DEFAULT_PWD,
pass, 0, maxsize - 1) <= 0) {
ATTICerr(0, ERR_R_UI_LIB);
pass = NULL;
} else {
switch (UI_process(ui)) {
case -2:
ATTICerr(0, ATTIC_R_UI_PROCESS_INTERRUPTED_OR_CANCELLED);
pass = NULL;
break;
case -1:
ATTICerr(0, ERR_R_UI_LIB);
pass = NULL;
break;
default:
break;
}
}
OPENSSL_free(prompt);
UI_free(ui);
return pass;
}
struct pem_pass_data {
const UI_METHOD *ui_method;
void *data;
const char *prompt_desc;
const char *prompt_info;
};
static int file_fill_pem_pass_data(struct pem_pass_data *pass_data,
const char *desc, const char *info,
const UI_METHOD *ui_method, void *ui_data)
{
if (pass_data == NULL)
return 0;
pass_data->ui_method = ui_method;
pass_data->data = ui_data;
pass_data->prompt_desc = desc;
pass_data->prompt_info = info;
return 1;
}
/* This is used anywhere a pem_password_cb is needed */
static int file_get_pem_pass(char *buf, int num, int w, void *data)
{
struct pem_pass_data *pass_data = data;
char *pass = file_get_pass(pass_data->ui_method, buf, num,
pass_data->prompt_desc, pass_data->prompt_info,
pass_data->data);
return pass == NULL ? 0 : strlen(pass);
}
/*
* Check if |str| ends with |suffix| preceded by a space, and if it does,
* return the index of that space. If there is no such suffix in |str|,
* return -1.
* For |str| == "FOO BAR" and |suffix| == "BAR", the returned value is 3.
*/
static int check_suffix(const char *str, const char *suffix)
{
int str_len = strlen(str);
int suffix_len = strlen(suffix) + 1;
const char *p = NULL;
if (suffix_len >= str_len)
return -1;
p = str + str_len - suffix_len;
if (*p != ' '
|| strcmp(p + 1, suffix) != 0)
return -1;
return p - str;
}
/*
* EMBEDDED is a special type of OSSL_STORE_INFO, specially for the file
* handlers, so we define it internally. This uses the possibility to
* create an OSSL_STORE_INFO with a generic data pointer and arbitrary
* type number.
*
* This is used by a FILE_HANDLER's try_decode function to signal that it
* has decoded the incoming blob into a new blob, and that the attempted
* decoding should be immediately restarted with the new blob, using the
* new PEM name.
*/
/* Negative numbers are never used for public OSSL_STORE_INFO types */
#define STORE_INFO_EMBEDDED -1
/* This is the embedded data */
struct embedded_st {
BUF_MEM *blob;
char *pem_name;
};
/* Helper functions */
static struct embedded_st *get0_EMBEDDED(OSSL_STORE_INFO *info)
{
return OSSL_STORE_INFO_get0_data(STORE_INFO_EMBEDDED, info);
}
static void store_info_free(OSSL_STORE_INFO *info)
{
struct embedded_st *data;
if (info != NULL && (data = get0_EMBEDDED(info)) != NULL) {
BUF_MEM_free(data->blob);
OPENSSL_free(data->pem_name);
OPENSSL_free(data);
}
OSSL_STORE_INFO_free(info);
}
static OSSL_STORE_INFO *new_EMBEDDED(const char *new_pem_name,
BUF_MEM *embedded)
{
OSSL_STORE_INFO *info = NULL;
struct embedded_st *data = NULL;
if ((data = OPENSSL_zalloc(sizeof(*data))) == NULL)
return NULL;
if ((info = OSSL_STORE_INFO_new(STORE_INFO_EMBEDDED, data)) == NULL) {
ATTICerr(0, ERR_R_OSSL_STORE_LIB);
OPENSSL_free(data);
return NULL;
}
data->blob = embedded;
data->pem_name =
new_pem_name == NULL ? NULL : OPENSSL_strdup(new_pem_name);
if (new_pem_name != NULL && data->pem_name == NULL) {
store_info_free(info);
info = NULL;
}
return info;
}
/*-
* The file scheme decoders
* ------------------------
*
* Each possible data type has its own decoder, which either operates
* through a given PEM name, or attempts to decode to see if the blob
* it's given is decodable for its data type. The assumption is that
* only the correct data type will match the content.
*/
/*-
* The try_decode function is called to check if the blob of data can
* be used by this handler, and if it can, decodes it into a supported
* OpenSSL type and returns an OSSL_STORE_INFO with the decoded data.
* Input:
* pem_name: If this blob comes from a PEM file, this holds
* the PEM name. If it comes from another type of
* file, this is NULL.
* pem_header: If this blob comes from a PEM file, this holds
* the PEM headers. If it comes from another type of
* file, this is NULL.
* blob: The blob of data to match with what this handler
* can use.
* len: The length of the blob.
* handler_ctx: For a handler marked repeatable, this pointer can
* be used to create a context for the handler. IT IS
* THE HANDLER'S RESPONSIBILITY TO CREATE AND DESTROY
* THIS CONTEXT APPROPRIATELY, i.e. create on first call
* and destroy when about to return NULL.
* matchcount: A pointer to an int to count matches for this data.
* Usually becomes 0 (no match) or 1 (match!), but may
* be higher in the (unlikely) event that the data matches
* more than one possibility. The int will always be
* zero when the function is called.
* ui_method: Application UI method for getting a password, pin
* or any other interactive data.
* ui_data: Application data to be passed to ui_method when
* it's called.
* libctx: The library context to be used if applicable
* propq: The property query string for any algorithm fetches
* Output:
* an OSSL_STORE_INFO
*/
typedef OSSL_STORE_INFO *(*file_try_decode_fn)(const char *pem_name,
const char *pem_header,
const unsigned char *blob,
size_t len, void **handler_ctx,
int *matchcount,
const UI_METHOD *ui_method,
void *ui_data, const char *uri,
OSSL_LIB_CTX *libctx,
const char *propq);
/*
* The eof function should return 1 if there's no more data to be found
* with the handler_ctx, otherwise 0. This is only used when the handler is
* marked repeatable.
*/
typedef int (*file_eof_fn)(void *handler_ctx);
/*
* The destroy_ctx function is used to destroy the handler_ctx that was
* initiated by a repeatable try_decode function. This is only used when
* the handler is marked repeatable.
*/
typedef void (*file_destroy_ctx_fn)(void **handler_ctx);
typedef struct file_handler_st {
const char *name;
file_try_decode_fn try_decode;
file_eof_fn eof;
file_destroy_ctx_fn destroy_ctx;
/* flags */
int repeatable;
} FILE_HANDLER;
/*
* PKCS#12 decoder. It operates by decoding all of the blob content,
* extracting all the interesting data from it and storing them internally,
* then serving them one piece at a time.
*/
static OSSL_STORE_INFO *try_decode_PKCS12(const char *pem_name,
const char *pem_header,
const unsigned char *blob,
size_t len, void **pctx,
int *matchcount,
const UI_METHOD *ui_method,
void *ui_data, const char *uri,
OSSL_LIB_CTX *libctx,
const char *propq)
{
OSSL_STORE_INFO *store_info = NULL;
STACK_OF(OSSL_STORE_INFO) *ctx = *pctx;
if (ctx == NULL) {
/* Initial parsing */
PKCS12 *p12;
if (pem_name != NULL)
/* No match, there is no PEM PKCS12 tag */
return NULL;
if ((p12 = d2i_PKCS12(NULL, &blob, len)) != NULL) {
char *pass = NULL;
char tpass[PEM_BUFSIZE];
EVP_PKEY *pkey = NULL;
X509 *cert = NULL;
STACK_OF(X509) *chain = NULL;
*matchcount = 1;
if (!PKCS12_mac_present(p12)
|| PKCS12_verify_mac(p12, "", 0)
|| PKCS12_verify_mac(p12, NULL, 0)) {
pass = "";
} else {
if ((pass = file_get_pass(ui_method, tpass, PEM_BUFSIZE,
"PKCS12 import", uri,
ui_data)) == NULL) {
ATTICerr(0, ATTIC_R_PASSPHRASE_CALLBACK_ERROR);
goto p12_end;
}
if (!PKCS12_verify_mac(p12, pass, strlen(pass))) {
ATTICerr(0, ATTIC_R_ERROR_VERIFYING_PKCS12_MAC);
goto p12_end;
}
}
if (PKCS12_parse(p12, pass, &pkey, &cert, &chain)) {
OSSL_STORE_INFO *osi_pkey = NULL;
OSSL_STORE_INFO *osi_cert = NULL;
OSSL_STORE_INFO *osi_ca = NULL;
int ok = 1;
if ((ctx = sk_OSSL_STORE_INFO_new_null()) != NULL) {
if (pkey != NULL) {
if ((osi_pkey = OSSL_STORE_INFO_new_PKEY(pkey)) != NULL
/* clearing pkey here avoids case distinctions */
&& (pkey = NULL) == NULL
&& sk_OSSL_STORE_INFO_push(ctx, osi_pkey) != 0)
osi_pkey = NULL;
else
ok = 0;
}
if (ok && cert != NULL) {
if ((osi_cert = OSSL_STORE_INFO_new_CERT(cert)) != NULL
/* clearing cert here avoids case distinctions */
&& (cert = NULL) == NULL
&& sk_OSSL_STORE_INFO_push(ctx, osi_cert) != 0)
osi_cert = NULL;
else
ok = 0;
}
while (ok && sk_X509_num(chain) > 0) {
X509 *ca = sk_X509_value(chain, 0);
if ((osi_ca = OSSL_STORE_INFO_new_CERT(ca)) != NULL
&& sk_X509_shift(chain) != NULL
&& sk_OSSL_STORE_INFO_push(ctx, osi_ca) != 0)
osi_ca = NULL;
else
ok = 0;
}
}
EVP_PKEY_free(pkey);
X509_free(cert);
OSSL_STACK_OF_X509_free(chain);
store_info_free(osi_pkey);
store_info_free(osi_cert);
store_info_free(osi_ca);
if (!ok) {
sk_OSSL_STORE_INFO_pop_free(ctx, store_info_free);
ctx = NULL;
}
*pctx = ctx;
}
}
p12_end:
PKCS12_free(p12);
if (ctx == NULL)
return NULL;
}
*matchcount = 1;
store_info = sk_OSSL_STORE_INFO_shift(ctx);
return store_info;
}
static int eof_PKCS12(void *ctx_)
{
STACK_OF(OSSL_STORE_INFO) *ctx = ctx_;
return ctx == NULL || sk_OSSL_STORE_INFO_num(ctx) == 0;
}
static void destroy_ctx_PKCS12(void **pctx)
{
STACK_OF(OSSL_STORE_INFO) *ctx = *pctx;
sk_OSSL_STORE_INFO_pop_free(ctx, store_info_free);
*pctx = NULL;
}
static FILE_HANDLER PKCS12_handler = {
"PKCS12",
try_decode_PKCS12,
eof_PKCS12,
destroy_ctx_PKCS12,
1 /* repeatable */
};
/*
* Encrypted PKCS#8 decoder. It operates by just decrypting the given blob
* into a new blob, which is returned as an EMBEDDED STORE_INFO. The whole
* decoding process will then start over with the new blob.
*/
static OSSL_STORE_INFO *try_decode_PKCS8Encrypted(const char *pem_name,
const char *pem_header,
const unsigned char *blob,
size_t len, void **pctx,
int *matchcount,
const UI_METHOD *ui_method,
void *ui_data,
const char *uri,
OSSL_LIB_CTX *libctx,
const char *propq)
{
X509_SIG *p8 = NULL;
char kbuf[PEM_BUFSIZE];
char *pass = NULL;
const X509_ALGOR *dalg = NULL;
const ASN1_OCTET_STRING *doct = NULL;
OSSL_STORE_INFO *store_info = NULL;
BUF_MEM *mem = NULL;
unsigned char *new_data = NULL;
int new_data_len;
if (pem_name != NULL) {
if (strcmp(pem_name, PEM_STRING_PKCS8) != 0)
return NULL;
*matchcount = 1;
}
if ((p8 = d2i_X509_SIG(NULL, &blob, len)) == NULL)
return NULL;
*matchcount = 1;
if ((mem = BUF_MEM_new()) == NULL) {
ATTICerr(0, ERR_R_BUF_LIB);
goto nop8;
}
if ((pass = file_get_pass(ui_method, kbuf, PEM_BUFSIZE,
"PKCS8 decrypt pass phrase", uri,
ui_data)) == NULL) {
ATTICerr(0, ATTIC_R_BAD_PASSWORD_READ);
goto nop8;
}
X509_SIG_get0(p8, &dalg, &doct);
if (!PKCS12_pbe_crypt(dalg, pass, strlen(pass), doct->data, doct->length,
&new_data, &new_data_len, 0))
goto nop8;
mem->data = (char *)new_data;
mem->max = mem->length = (size_t)new_data_len;
X509_SIG_free(p8);
p8 = NULL;
store_info = new_EMBEDDED(PEM_STRING_PKCS8INF, mem);
if (store_info == NULL) {
ATTICerr(0, ERR_R_OSSL_STORE_LIB);
goto nop8;
}
return store_info;
nop8:
X509_SIG_free(p8);
BUF_MEM_free(mem);
return NULL;
}
static FILE_HANDLER PKCS8Encrypted_handler = {
"PKCS8Encrypted",
try_decode_PKCS8Encrypted
};
/*
* Private key decoder. Decodes all sorts of private keys, both PKCS#8
* encoded ones and old style PEM ones (with the key type is encoded into
* the PEM name).
*/
static OSSL_STORE_INFO *try_decode_PrivateKey(const char *pem_name,
const char *pem_header,
const unsigned char *blob,
size_t len, void **pctx,
int *matchcount,
const UI_METHOD *ui_method,
void *ui_data, const char *uri,
OSSL_LIB_CTX *libctx,
const char *propq)
{
OSSL_STORE_INFO *store_info = NULL;
EVP_PKEY *pkey = NULL;
const EVP_PKEY_ASN1_METHOD *ameth = NULL;
if (pem_name != NULL) {
if (strcmp(pem_name, PEM_STRING_PKCS8INF) == 0) {
PKCS8_PRIV_KEY_INFO *p8inf =
d2i_PKCS8_PRIV_KEY_INFO(NULL, &blob, len);
*matchcount = 1;
if (p8inf != NULL)
pkey = EVP_PKCS82PKEY_ex(p8inf, libctx, propq);
PKCS8_PRIV_KEY_INFO_free(p8inf);
} else {
int slen;
int pkey_id;
if ((slen = check_suffix(pem_name, "PRIVATE KEY")) > 0
&& (ameth = EVP_PKEY_asn1_find_str(NULL, pem_name,
slen)) != NULL
&& EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL,
ameth)) {
*matchcount = 1;
pkey = d2i_PrivateKey_ex(pkey_id, NULL, &blob, len,
libctx, propq);
}
}
} else {
int i;
#ifndef OPENSSL_NO_ENGINE
ENGINE *curengine = ENGINE_get_first();
while (curengine != NULL) {
ENGINE_PKEY_ASN1_METHS_PTR asn1meths =
ENGINE_get_pkey_asn1_meths(curengine);
if (asn1meths != NULL) {
const int *nids = NULL;
int nids_n = asn1meths(curengine, NULL, &nids, 0);
for (i = 0; i < nids_n; i++) {
EVP_PKEY_ASN1_METHOD *ameth2 = NULL;
EVP_PKEY *tmp_pkey = NULL;
const unsigned char *tmp_blob = blob;
int pkey_id, pkey_flags;
if (!asn1meths(curengine, &ameth2, NULL, nids[i])
|| !EVP_PKEY_asn1_get0_info(&pkey_id, NULL,
&pkey_flags, NULL, NULL,
ameth2)
|| (pkey_flags & ASN1_PKEY_ALIAS) != 0)
continue;
ERR_set_mark(); /* prevent flooding error queue */
tmp_pkey = d2i_PrivateKey_ex(pkey_id, NULL,
&tmp_blob, len,
libctx, propq);
if (tmp_pkey != NULL) {
if (pkey != NULL)
EVP_PKEY_free(tmp_pkey);
else
pkey = tmp_pkey;
(*matchcount)++;
}
ERR_pop_to_mark();
}
}
curengine = ENGINE_get_next(curengine);
}
#endif
for (i = 0; i < EVP_PKEY_asn1_get_count(); i++) {
EVP_PKEY *tmp_pkey = NULL;
const unsigned char *tmp_blob = blob;
int pkey_id, pkey_flags;
ameth = EVP_PKEY_asn1_get0(i);
if (!EVP_PKEY_asn1_get0_info(&pkey_id, NULL, &pkey_flags, NULL,
NULL, ameth)
|| (pkey_flags & ASN1_PKEY_ALIAS) != 0)
continue;
ERR_set_mark(); /* prevent flooding error queue */
tmp_pkey = d2i_PrivateKey_ex(pkey_id, NULL, &tmp_blob, len,
libctx, propq);
if (tmp_pkey != NULL) {
if (pkey != NULL)
EVP_PKEY_free(tmp_pkey);
else
pkey = tmp_pkey;
(*matchcount)++;
}
ERR_pop_to_mark();
}
if (*matchcount > 1) {
EVP_PKEY_free(pkey);
pkey = NULL;
}
}
if (pkey == NULL)
/* No match */
return NULL;
store_info = OSSL_STORE_INFO_new_PKEY(pkey);
if (store_info == NULL)
EVP_PKEY_free(pkey);
return store_info;
}
static FILE_HANDLER PrivateKey_handler = {
"PrivateKey",
try_decode_PrivateKey
};
/*
* Public key decoder. Only supports SubjectPublicKeyInfo formatted keys.
*/
static OSSL_STORE_INFO *try_decode_PUBKEY(const char *pem_name,
const char *pem_header,
const unsigned char *blob,
size_t len, void **pctx,
int *matchcount,
const UI_METHOD *ui_method,
void *ui_data, const char *uri,
OSSL_LIB_CTX *libctx,
const char *propq)
{
OSSL_STORE_INFO *store_info = NULL;
EVP_PKEY *pkey = NULL;
if (pem_name != NULL) {
if (strcmp(pem_name, PEM_STRING_PUBLIC) != 0)
/* No match */
return NULL;
*matchcount = 1;
}
if ((pkey = d2i_PUBKEY(NULL, &blob, len)) != NULL) {
*matchcount = 1;
store_info = OSSL_STORE_INFO_new_PUBKEY(pkey);
}
return store_info;
}
static FILE_HANDLER PUBKEY_handler = {
"PUBKEY",
try_decode_PUBKEY
};
/*
* Key parameter decoder.
*/
static OSSL_STORE_INFO *try_decode_params(const char *pem_name,
const char *pem_header,
const unsigned char *blob,
size_t len, void **pctx,
int *matchcount,
const UI_METHOD *ui_method,
void *ui_data, const char *uri,
OSSL_LIB_CTX *libctx,
const char *propq)
{
OSSL_STORE_INFO *store_info = NULL;
EVP_PKEY *pkey = NULL;
const EVP_PKEY_ASN1_METHOD *ameth = NULL;
if (pem_name != NULL) {
int slen;
int pkey_id;
if ((slen = check_suffix(pem_name, "PARAMETERS")) > 0
&& (ameth = EVP_PKEY_asn1_find_str(NULL, pem_name, slen)) != NULL
&& EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL,
ameth)) {
*matchcount = 1;
pkey = d2i_KeyParams(pkey_id, NULL, &blob, len);
}
} else {
int i;
for (i = 0; i < EVP_PKEY_asn1_get_count(); i++) {
EVP_PKEY *tmp_pkey = NULL;
const unsigned char *tmp_blob = blob;
int pkey_id, pkey_flags;
ameth = EVP_PKEY_asn1_get0(i);
if (!EVP_PKEY_asn1_get0_info(&pkey_id, NULL, &pkey_flags, NULL,
NULL, ameth)
|| (pkey_flags & ASN1_PKEY_ALIAS) != 0)
continue;
ERR_set_mark(); /* prevent flooding error queue */
tmp_pkey = d2i_KeyParams(pkey_id, NULL, &tmp_blob, len);
if (tmp_pkey != NULL) {
if (pkey != NULL)
EVP_PKEY_free(tmp_pkey);
else
pkey = tmp_pkey;
(*matchcount)++;
}
ERR_pop_to_mark();
}
if (*matchcount > 1) {
EVP_PKEY_free(pkey);
pkey = NULL;
}
}
if (pkey == NULL)
/* No match */
return NULL;
store_info = OSSL_STORE_INFO_new_PARAMS(pkey);
if (store_info == NULL)
EVP_PKEY_free(pkey);
return store_info;
}
static FILE_HANDLER params_handler = {
"params",
try_decode_params
};
/*
* X.509 certificate decoder.
*/
static OSSL_STORE_INFO *try_decode_X509Certificate(const char *pem_name,
const char *pem_header,
const unsigned char *blob,
size_t len, void **pctx,
int *matchcount,
const UI_METHOD *ui_method,
void *ui_data,
const char *uri,
OSSL_LIB_CTX *libctx,
const char *propq)
{
OSSL_STORE_INFO *store_info = NULL;
X509 *cert = NULL;
/*
* In most cases, we can try to interpret the serialized data as a trusted
* cert (X509 + X509_AUX) and fall back to reading it as a normal cert
* (just X509), but if the PEM name specifically declares it as a trusted
* cert, then no fallback should be engaged. |ignore_trusted| tells if
* the fallback can be used (1) or not (0).
*/
int ignore_trusted = 1;
if (pem_name != NULL) {
if (strcmp(pem_name, PEM_STRING_X509_TRUSTED) == 0)
ignore_trusted = 0;
else if (strcmp(pem_name, PEM_STRING_X509_OLD) != 0
&& strcmp(pem_name, PEM_STRING_X509) != 0)
/* No match */
return NULL;
*matchcount = 1;
}
cert = X509_new_ex(libctx, propq);
if (cert == NULL)
return NULL;
if ((d2i_X509_AUX(&cert, &blob, len)) != NULL
|| (ignore_trusted && (d2i_X509(&cert, &blob, len)) != NULL)) {
*matchcount = 1;
store_info = OSSL_STORE_INFO_new_CERT(cert);
}
if (store_info == NULL)
X509_free(cert);
return store_info;
}
static FILE_HANDLER X509Certificate_handler = {
"X509Certificate",
try_decode_X509Certificate
};
/*
* X.509 CRL decoder.
*/
static OSSL_STORE_INFO *try_decode_X509CRL(const char *pem_name,
const char *pem_header,
const unsigned char *blob,
size_t len, void **pctx,
int *matchcount,
const UI_METHOD *ui_method,
void *ui_data, const char *uri,
OSSL_LIB_CTX *libctx,
const char *propq)
{
OSSL_STORE_INFO *store_info = NULL;
X509_CRL *crl = NULL;
if (pem_name != NULL) {
if (strcmp(pem_name, PEM_STRING_X509_CRL) != 0)
/* No match */
return NULL;
*matchcount = 1;
}
if ((crl = d2i_X509_CRL(NULL, &blob, len)) != NULL) {
*matchcount = 1;
store_info = OSSL_STORE_INFO_new_CRL(crl);
}
if (store_info == NULL)
X509_CRL_free(crl);
return store_info;
}
static FILE_HANDLER X509CRL_handler = {
"X509CRL",
try_decode_X509CRL
};
/*
* To finish it all off, we collect all the handlers.
*/
static const FILE_HANDLER *file_handlers[] = {
&PKCS12_handler,
&PKCS8Encrypted_handler,
&X509Certificate_handler,
&X509CRL_handler,
¶ms_handler,
&PUBKEY_handler,
&PrivateKey_handler,
};
/*-
* The loader itself
* -----------------
*/
struct ossl_store_loader_ctx_st {
char *uri; /* The URI we currently try to load */
enum {
is_raw = 0,
is_pem,
is_dir
} type;
int errcnt;
#define FILE_FLAG_SECMEM (1<<0)
#define FILE_FLAG_ATTACHED (1<<1)
unsigned int flags;
union {
struct { /* Used with is_raw and is_pem */
BIO *file;
/*
* The following are used when the handler is marked as
* repeatable
*/
const FILE_HANDLER *last_handler;
void *last_handler_ctx;
} file;
struct { /* Used with is_dir */
OPENSSL_DIR_CTX *ctx;
int end_reached;
/*
* When a search expression is given, these are filled in.
* |search_name| contains the file basename to look for.
* The string is exactly 8 characters long.
*/
char search_name[9];
/*
* The directory reading utility we have combines opening with
* reading the first name. To make sure we can detect the end
* at the right time, we read early and cache the name.
*/
const char *last_entry;
int last_errno;
} dir;
} _;
/* Expected object type. May be unspecified */
int expected_type;
OSSL_LIB_CTX *libctx;
char *propq;
};
static void OSSL_STORE_LOADER_CTX_free(OSSL_STORE_LOADER_CTX *ctx)
{
if (ctx == NULL)
return;
OPENSSL_free(ctx->propq);
OPENSSL_free(ctx->uri);
if (ctx->type != is_dir) {
if (ctx->_.file.last_handler != NULL) {
ctx->_.file.last_handler->destroy_ctx(&ctx->_.file.last_handler_ctx);
ctx->_.file.last_handler_ctx = NULL;
ctx->_.file.last_handler = NULL;
}
}
OPENSSL_free(ctx);
}
static int file_find_type(OSSL_STORE_LOADER_CTX *ctx)
{
BIO *buff = NULL;
char peekbuf[4096] = { 0, };
if ((buff = BIO_new(BIO_f_buffer())) == NULL)
return 0;
ctx->_.file.file = BIO_push(buff, ctx->_.file.file);
if (BIO_buffer_peek(ctx->_.file.file, peekbuf, sizeof(peekbuf) - 1) > 0) {
peekbuf[sizeof(peekbuf) - 1] = '\0';
if (strstr(peekbuf, "-----BEGIN ") != NULL)
ctx->type = is_pem;
}
return 1;
}
static OSSL_STORE_LOADER_CTX *file_open_ex
(const OSSL_STORE_LOADER *loader, const char *uri,
OSSL_LIB_CTX *libctx, const char *propq,
const UI_METHOD *ui_method, void *ui_data)
{
OSSL_STORE_LOADER_CTX *ctx = NULL;
struct stat st;
struct {
const char *path;
unsigned int check_absolute:1;
} path_data[2];
size_t path_data_n = 0, i;
const char *path, *p = uri, *q;
/*
* First step, just take the URI as is.
*/
path_data[path_data_n].check_absolute = 0;
path_data[path_data_n++].path = uri;
/*
* Second step, if the URI appears to start with the "file" scheme,
* extract the path and make that the second path to check.
* There's a special case if the URI also contains an authority, then
* the full URI shouldn't be used as a path anywhere.
*/
if (CHECK_AND_SKIP_CASE_PREFIX(p, "file:")) {
q = p;
if (CHECK_AND_SKIP_PREFIX(q, "//")) {
path_data_n--; /* Invalidate using the full URI */
if (CHECK_AND_SKIP_CASE_PREFIX(q, "localhost/")
|| CHECK_AND_SKIP_PREFIX(q, "/")) {
p = q - 1;
} else {
ATTICerr(0, ATTIC_R_URI_AUTHORITY_UNSUPPORTED);
return NULL;
}
}
path_data[path_data_n].check_absolute = 1;
#ifdef _WIN32
/* Windows "file:" URIs with a drive letter start with a '/' */
if (p[0] == '/' && p[2] == ':' && p[3] == '/') {
char c = tolower((unsigned char)p[1]);
if (c >= 'a' && c <= 'z') {
p++;
/* We know it's absolute, so no need to check */
path_data[path_data_n].check_absolute = 0;
}
}
#endif
path_data[path_data_n++].path = p;
}
for (i = 0, path = NULL; path == NULL && i < path_data_n; i++) {
/*