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- /*
- * Copyright 2016-2018 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
- */
- #include "e_os.h"
- #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/x509.h> /* For the PKCS8 stuff o.O */
- #include "internal/asn1_int.h"
- #include "internal/ctype.h"
- #include "internal/o_dir.h"
- #include "internal/cryptlib.h"
- #include "internal/store_int.h"
- #include "store_locl.h"
- #ifdef _WIN32
- # define stat _stat
- #endif
- #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 *prompt_info, void *data)
- {
- UI *ui = UI_new();
- char *prompt = NULL;
- if (ui == NULL) {
- OSSL_STOREerr(OSSL_STORE_F_FILE_GET_PASS, ERR_R_MALLOC_FAILURE);
- return NULL;
- }
- if (ui_method != NULL)
- UI_set_method(ui, ui_method);
- UI_add_user_data(ui, data);
- if ((prompt = UI_construct_prompt(ui, "pass phrase",
- prompt_info)) == NULL) {
- OSSL_STOREerr(OSSL_STORE_F_FILE_GET_PASS, ERR_R_MALLOC_FAILURE);
- pass = NULL;
- } else if (!UI_add_input_string(ui, prompt, UI_INPUT_FLAG_DEFAULT_PWD,
- pass, 0, maxsize - 1)) {
- OSSL_STOREerr(OSSL_STORE_F_FILE_GET_PASS, ERR_R_UI_LIB);
- pass = NULL;
- } else {
- switch (UI_process(ui)) {
- case -2:
- OSSL_STOREerr(OSSL_STORE_F_FILE_GET_PASS,
- OSSL_STORE_R_UI_PROCESS_INTERRUPTED_OR_CANCELLED);
- pass = NULL;
- break;
- case -1:
- OSSL_STOREerr(OSSL_STORE_F_FILE_GET_PASS, 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_info;
- };
- static int file_fill_pem_pass_data(struct pem_pass_data *pass_data,
- const char *prompt_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_info = prompt_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_info, pass_data->data);
- return pass == NULL ? 0 : strlen(pass);
- }
- /*-
- * 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 a 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.
- * Output:
- * a 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);
- /*
- * 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
- * intiated by a repeatable try_decode fuction. 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)
- {
- OSSL_STORE_INFO *store_info = NULL;
- STACK_OF(OSSL_STORE_INFO) *ctx = *pctx;
- if (ctx == NULL) {
- /* Initial parsing */
- PKCS12 *p12;
- int ok = 0;
- 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_verify_mac(p12, "", 0)
- || PKCS12_verify_mac(p12, NULL, 0)) {
- pass = "";
- } else {
- if ((pass = file_get_pass(ui_method, tpass, PEM_BUFSIZE,
- "PKCS12 import password",
- ui_data)) == NULL) {
- OSSL_STOREerr(OSSL_STORE_F_TRY_DECODE_PKCS12,
- OSSL_STORE_R_PASSPHRASE_CALLBACK_ERROR);
- goto p12_end;
- }
- if (!PKCS12_verify_mac(p12, pass, strlen(pass))) {
- OSSL_STOREerr(OSSL_STORE_F_TRY_DECODE_PKCS12,
- OSSL_STORE_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;
- if ((ctx = sk_OSSL_STORE_INFO_new_null()) != NULL
- && (osi_pkey = OSSL_STORE_INFO_new_PKEY(pkey)) != NULL
- && sk_OSSL_STORE_INFO_push(ctx, osi_pkey) != 0
- && (osi_cert = OSSL_STORE_INFO_new_CERT(cert)) != NULL
- && sk_OSSL_STORE_INFO_push(ctx, osi_cert) != 0) {
- ok = 1;
- osi_pkey = NULL;
- osi_cert = NULL;
- while(sk_X509_num(chain) > 0) {
- X509 *ca = sk_X509_value(chain, 0);
- if ((osi_ca = OSSL_STORE_INFO_new_CERT(ca)) == NULL
- || sk_OSSL_STORE_INFO_push(ctx, osi_ca) == 0) {
- ok = 0;
- break;
- }
- osi_ca = NULL;
- (void)sk_X509_shift(chain);
- }
- }
- if (!ok) {
- OSSL_STORE_INFO_free(osi_ca);
- OSSL_STORE_INFO_free(osi_cert);
- OSSL_STORE_INFO_free(osi_pkey);
- sk_OSSL_STORE_INFO_pop_free(ctx, OSSL_STORE_INFO_free);
- EVP_PKEY_free(pkey);
- X509_free(cert);
- sk_X509_pop_free(chain, X509_free);
- ctx = NULL;
- }
- *pctx = ctx;
- }
- }
- p12_end:
- PKCS12_free(p12);
- if (!ok)
- return NULL;
- }
- if (ctx != 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, OSSL_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)
- {
- 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) {
- OSSL_STOREerr(OSSL_STORE_F_TRY_DECODE_PKCS8ENCRYPTED,
- ERR_R_MALLOC_FAILURE);
- goto nop8;
- }
- if ((pass = file_get_pass(ui_method, kbuf, PEM_BUFSIZE,
- "PKCS8 decrypt password", ui_data)) == NULL) {
- OSSL_STOREerr(OSSL_STORE_F_TRY_DECODE_PKCS8ENCRYPTED,
- OSSL_STORE_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);
- store_info = ossl_store_info_new_EMBEDDED(PEM_STRING_PKCS8INF, mem);
- if (store_info == NULL) {
- OSSL_STOREerr(OSSL_STORE_F_TRY_DECODE_PKCS8ENCRYPTED,
- ERR_R_MALLOC_FAILURE);
- 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).
- */
- int pem_check_suffix(const char *pem_str, const char *suffix);
- 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)
- {
- 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(p8inf);
- PKCS8_PRIV_KEY_INFO_free(p8inf);
- } else {
- int slen;
- if ((slen = pem_check_suffix(pem_name, "PRIVATE KEY")) > 0
- && (ameth = EVP_PKEY_asn1_find_str(NULL, pem_name,
- slen)) != NULL) {
- *matchcount = 1;
- pkey = d2i_PrivateKey(ameth->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;
- ameth = EVP_PKEY_asn1_get0(i);
- if (ameth->pkey_flags & ASN1_PKEY_ALIAS)
- continue;
- tmp_pkey = d2i_PrivateKey(ameth->pkey_id, NULL, &tmp_blob, len);
- if (tmp_pkey != NULL) {
- if (pkey != NULL)
- EVP_PKEY_free(tmp_pkey);
- else
- pkey = tmp_pkey;
- (*matchcount)++;
- }
- }
- 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 formated 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)
- {
- 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_PKEY(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)
- {
- OSSL_STORE_INFO *store_info = NULL;
- int slen = 0;
- EVP_PKEY *pkey = NULL;
- const EVP_PKEY_ASN1_METHOD *ameth = NULL;
- int ok = 0;
- if (pem_name != NULL) {
- if ((slen = pem_check_suffix(pem_name, "PARAMETERS")) == 0)
- return NULL;
- *matchcount = 1;
- }
- if (slen > 0) {
- if ((pkey = EVP_PKEY_new()) == NULL) {
- OSSL_STOREerr(OSSL_STORE_F_TRY_DECODE_PARAMS, ERR_R_EVP_LIB);
- return NULL;
- }
- if (EVP_PKEY_set_type_str(pkey, pem_name, slen)
- && (ameth = EVP_PKEY_get0_asn1(pkey)) != NULL
- && ameth->param_decode != NULL
- && ameth->param_decode(pkey, &blob, len))
- ok = 1;
- } else {
- int i;
- EVP_PKEY *tmp_pkey = NULL;
- for (i = 0; i < EVP_PKEY_asn1_get_count(); i++) {
- const unsigned char *tmp_blob = blob;
- if (tmp_pkey == NULL && (tmp_pkey = EVP_PKEY_new()) == NULL) {
- OSSL_STOREerr(OSSL_STORE_F_TRY_DECODE_PARAMS, ERR_R_EVP_LIB);
- break;
- }
- ameth = EVP_PKEY_asn1_get0(i);
- if (ameth->pkey_flags & ASN1_PKEY_ALIAS)
- continue;
- if (EVP_PKEY_set_type(tmp_pkey, ameth->pkey_id)
- && (ameth = EVP_PKEY_get0_asn1(tmp_pkey)) != NULL
- && ameth->param_decode != NULL
- && ameth->param_decode(tmp_pkey, &tmp_blob, len)) {
- if (pkey != NULL)
- EVP_PKEY_free(tmp_pkey);
- else
- pkey = tmp_pkey;
- tmp_pkey = NULL;
- (*matchcount)++;
- }
- }
- EVP_PKEY_free(tmp_pkey);
- if (*matchcount == 1) {
- ok = 1;
- }
- }
- if (ok)
- 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)
- {
- 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;
- }
- if ((cert = d2i_X509_AUX(NULL, &blob, len)) != NULL
- || (ignore_trusted && (cert = d2i_X509(NULL, &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)
- {
- 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 {
- enum {
- is_raw = 0,
- is_pem,
- is_dir
- } type;
- int errcnt;
- #define FILE_FLAG_SECMEM (1<<0)
- 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;
- char *uri;
- /*
- * 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;
- };
- static void OSSL_STORE_LOADER_CTX_free(OSSL_STORE_LOADER_CTX *ctx)
- {
- if (ctx->type == is_dir) {
- OPENSSL_free(ctx->_.dir.uri);
- } else {
- 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 OSSL_STORE_LOADER_CTX *file_open(const OSSL_STORE_LOADER *loader,
- const char *uri,
- 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;
- /*
- * 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 (strncasecmp(uri, "file:", 5) == 0) {
- const char *p = &uri[5];
- if (strncmp(&uri[5], "//", 2) == 0) {
- path_data_n--; /* Invalidate using the full URI */
- if (strncasecmp(&uri[7], "localhost/", 10) == 0) {
- p = &uri[16];
- } else if (uri[7] == '/') {
- p = &uri[7];
- } else {
- OSSL_STOREerr(OSSL_STORE_F_FILE_OPEN,
- OSSL_STORE_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 = ossl_tolower(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++) {
- /*
- * If the scheme "file" was an explicit part of the URI, the path must
- * be absolute. So says RFC 8089
- */
- if (path_data[i].check_absolute && path_data[i].path[0] != '/') {
- OSSL_STOREerr(OSSL_STORE_F_FILE_OPEN,
- OSSL_STORE_R_PATH_MUST_BE_ABSOLUTE);
- ERR_add_error_data(1, path_data[i].path);
- return NULL;
- }
- if (stat(path_data[i].path, &st) < 0) {
- SYSerr(SYS_F_STAT, errno);
- ERR_add_error_data(1, path_data[i].path);
- } else {
- path = path_data[i].path;
- }
- }
- if (path == NULL) {
- return NULL;
- }
- /* Successfully found a working path, clear possible collected errors */
- ERR_clear_error();
- ctx = OPENSSL_zalloc(sizeof(*ctx));
- if (ctx == NULL) {
- OSSL_STOREerr(OSSL_STORE_F_FILE_OPEN, ERR_R_MALLOC_FAILURE);
- return NULL;
- }
- if (S_ISDIR(st.st_mode)) {
- /*
- * Try to copy everything, even if we know that some of them must be
- * NULL for the moment. This prevents errors in the future, when more
- * components may be used.
- */
- ctx->_.dir.uri = OPENSSL_strdup(uri);
- ctx->type = is_dir;
- if (ctx->_.dir.uri == NULL)
- goto err;
- ctx->_.dir.last_entry = OPENSSL_DIR_read(&ctx->_.dir.ctx, path);
- ctx->_.dir.last_errno = errno;
- if (ctx->_.dir.last_entry == NULL) {
- if (ctx->_.dir.last_errno != 0) {
- char errbuf[256];
- errno = ctx->_.dir.last_errno;
- openssl_strerror_r(errno, errbuf, sizeof(errbuf));
- OSSL_STOREerr(OSSL_STORE_F_FILE_OPEN, ERR_R_SYS_LIB);
- ERR_add_error_data(1, errbuf);
- goto err;
- }
- ctx->_.dir.end_reached = 1;
- }
- } else {
- BIO *buff = NULL;
- char peekbuf[4096] = { 0, };
- if ((buff = BIO_new(BIO_f_buffer())) == NULL
- || (ctx->_.file.file = BIO_new_file(path, "rb")) == NULL) {
- BIO_free_all(buff);
- goto err;
- }
- 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 ctx;
- err:
- OSSL_STORE_LOADER_CTX_free(ctx);
- return NULL;
- }
- static int file_ctrl(OSSL_STORE_LOADER_CTX *ctx, int cmd, va_list args)
- {
- int ret = 1;
- switch (cmd) {
- case OSSL_STORE_C_USE_SECMEM:
- {
- int on = *(va_arg(args, int *));
- switch (on) {
- case 0:
- ctx->flags &= ~FILE_FLAG_SECMEM;
- break;
- case 1:
- ctx->flags |= FILE_FLAG_SECMEM;
- break;
- default:
- OSSL_STOREerr(OSSL_STORE_F_FILE_CTRL,
- ERR_R_PASSED_INVALID_ARGUMENT);
- ret = 0;
- break;
- }
- }
- break;
- default:
- break;
- }
- return ret;
- }
- static int file_expect(OSSL_STORE_LOADER_CTX *ctx, int expected)
- {
- ctx->expected_type = expected;
- return 1;
- }
- static int file_find(OSSL_STORE_LOADER_CTX *ctx, OSSL_STORE_SEARCH *search)
- {
- /*
- * If ctx == NULL, the library is looking to know if this loader supports
- * the given search type.
- */
- if (OSSL_STORE_SEARCH_get_type(search) == OSSL_STORE_SEARCH_BY_NAME) {
- unsigned long hash = 0;
- if (ctx == NULL)
- return 1;
- if (ctx->type != is_dir) {
- OSSL_STOREerr(OSSL_STORE_F_FILE_FIND,
- OSSL_STORE_R_SEARCH_ONLY_SUPPORTED_FOR_DIRECTORIES);
- return 0;
- }
- hash = X509_NAME_hash(OSSL_STORE_SEARCH_get0_name(search));
- BIO_snprintf(ctx->_.dir.search_name, sizeof(ctx->_.dir.search_name),
- "%08lx", hash);
- return 1;
- }
- if (ctx != NULL)
- OSSL_STOREerr(OSSL_STORE_F_FILE_FIND,
- OSSL_STORE_R_UNSUPPORTED_SEARCH_TYPE);
- return 0;
- }
- /* Internal function to decode an already opened PEM file */
- OSSL_STORE_LOADER_CTX *ossl_store_file_attach_pem_bio_int(BIO *bp)
- {
- OSSL_STORE_LOADER_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx));
- if (ctx == NULL) {
- OSSL_STOREerr(OSSL_STORE_F_OSSL_STORE_FILE_ATTACH_PEM_BIO_INT,
- ERR_R_MALLOC_FAILURE);
- return NULL;
- }
- ctx->_.file.file = bp;
- ctx->type = is_pem;
- return ctx;
- }
- static OSSL_STORE_INFO *file_load_try_decode(OSSL_STORE_LOADER_CTX *ctx,
- const char *pem_name,
- const char *pem_header,
- unsigned char *data, size_t len,
- const UI_METHOD *ui_method,
- void *ui_data, int *matchcount)
- {
- OSSL_STORE_INFO *result = NULL;
- BUF_MEM *new_mem = NULL;
- char *new_pem_name = NULL;
- int t = 0;
- again:
- {
- size_t i = 0;
- void *handler_ctx = NULL;
- const FILE_HANDLER **matching_handlers =
- OPENSSL_zalloc(sizeof(*matching_handlers)
- * OSSL_NELEM(file_handlers));
- if (matching_handlers == NULL) {
- OSSL_STOREerr(OSSL_STORE_F_FILE_LOAD_TRY_DECODE,
- ERR_R_MALLOC_FAILURE);
- goto err;
- }
- *matchcount = 0;
- for (i = 0; i < OSSL_NELEM(file_handlers); i++) {
- const FILE_HANDLER *handler = file_handlers[i];
- int try_matchcount = 0;
- void *tmp_handler_ctx = NULL;
- OSSL_STORE_INFO *tmp_result =
- handler->try_decode(pem_name, pem_header, data, len,
- &tmp_handler_ctx, &try_matchcount,
- ui_method, ui_data);
- if (try_matchcount > 0) {
- matching_handlers[*matchcount] = handler;
- if (handler_ctx)
- handler->destroy_ctx(&handler_ctx);
- handler_ctx = tmp_handler_ctx;
- if ((*matchcount += try_matchcount) > 1) {
- /* more than one match => ambiguous, kill any result */
- OSSL_STORE_INFO_free(result);
- OSSL_STORE_INFO_free(tmp_result);
- if (handler->destroy_ctx != NULL)
- handler->destroy_ctx(&handler_ctx);
- handler_ctx = NULL;
- tmp_result = NULL;
- result = NULL;
- }
- if (result == NULL)
- result = tmp_result;
- }
- }
- if (*matchcount == 1 && matching_handlers[0]->repeatable) {
- ctx->_.file.last_handler = matching_handlers[0];
- ctx->_.file.last_handler_ctx = handler_ctx;
- }
- OPENSSL_free(matching_handlers);
- }
- err:
- OPENSSL_free(new_pem_name);
- BUF_MEM_free(new_mem);
- if (result != NULL
- && (t = OSSL_STORE_INFO_get_type(result)) == OSSL_STORE_INFO_EMBEDDED) {
- pem_name = new_pem_name =
- ossl_store_info_get0_EMBEDDED_pem_name(result);
- new_mem = ossl_store_info_get0_EMBEDDED_buffer(result);
- data = (unsigned char *)new_mem->data;
- len = new_mem->length;
- OPENSSL_free(result);
- result = NULL;
- goto again;
- }
- if (result != NULL)
- ERR_clear_error();
- return result;
- }
- static OSSL_STORE_INFO *file_load_try_repeat(OSSL_STORE_LOADER_CTX *ctx,
- const UI_METHOD *ui_method,
- void *ui_data)
- {
- OSSL_STORE_INFO *result = NULL;
- int try_matchcount = 0;
- if (ctx->_.file.last_handler != NULL) {
- result =
- ctx->_.file.last_handler->try_decode(NULL, NULL, NULL, 0,
- &ctx->_.file.last_handler_ctx,
- &try_matchcount,
- ui_method, ui_data);
- if (result == NULL) {
- ctx->_.file.last_handler->destroy_ctx(&ctx->_.file.last_handler_ctx);
- ctx->_.file.last_handler_ctx = NULL;
- ctx->_.file.last_handler = NULL;
- }
- }
- return result;
- }
- static void pem_free_flag(void *pem_data, int secure, size_t num)
- {
- if (secure)
- OPENSSL_secure_clear_free(pem_data, num);
- else
- OPENSSL_free(pem_data);
- }
- static int file_read_pem(BIO *bp, char **pem_name, char **pem_header,
- unsigned char **data, long *len,
- const UI_METHOD *ui_method,
- void *ui_data, int secure)
- {
- int i = secure
- ? PEM_read_bio_ex(bp, pem_name, pem_header, data, len,
- PEM_FLAG_SECURE | PEM_FLAG_EAY_COMPATIBLE)
- : PEM_read_bio(bp, pem_name, pem_header, data, len);
- if (i <= 0)
- return 0;
- /*
- * 10 is the number of characters in "Proc-Type:", which
- * PEM_get_EVP_CIPHER_INFO() requires to be present.
- * If the PEM header has less characters than that, it's
- * not worth spending cycles on it.
- */
- if (strlen(*pem_header) > 10) {
- EVP_CIPHER_INFO cipher;
- struct pem_pass_data pass_data;
- if (!PEM_get_EVP_CIPHER_INFO(*pem_header, &cipher)
- || !file_fill_pem_pass_data(&pass_data, "PEM", ui_method, ui_data)
- || !PEM_do_header(&cipher, *data, len, file_get_pem_pass,
- &pass_data)) {
- return 0;
- }
- }
- return 1;
- }
- static int file_read_asn1(BIO *bp, unsigned char **data, long *len)
- {
- BUF_MEM *mem = NULL;
- if (asn1_d2i_read_bio(bp, &mem) < 0)
- return 0;
- *data = (unsigned char *)mem->data;
- *len = (long)mem->length;
- OPENSSL_free(mem);
- return 1;
- }
- static int ends_with_dirsep(const char *uri)
- {
- if (*uri != '\0')
- uri += strlen(uri) - 1;
- #if defined __VMS
- if (*uri == ']' || *uri == '>' || *uri == ':')
- return 1;
- #elif defined _WIN32
- if (*uri == '\\')
- return 1;
- #endif
- return *uri == '/';
- }
- static int file_name_to_uri(OSSL_STORE_LOADER_CTX *ctx, const char *name,
- char **data)
- {
- assert(name != NULL);
- assert(data != NULL);
- {
- const char *pathsep = ends_with_dirsep(ctx->_.dir.uri) ? "" : "/";
- long calculated_length = strlen(ctx->_.dir.uri) + strlen(pathsep)
- + strlen(name) + 1 /* \0 */;
- *data = OPENSSL_zalloc(calculated_length);
- if (*data == NULL) {
- OSSL_STOREerr(OSSL_STORE_F_FILE_NAME_TO_URI, ERR_R_MALLOC_FAILURE);
- return 0;
- }
- OPENSSL_strlcat(*data, ctx->_.dir.uri, calculated_length);
- OPENSSL_strlcat(*data, pathsep, calculated_length);
- OPENSSL_strlcat(*data, name, calculated_length);
- }
- return 1;
- }
- static int file_name_check(OSSL_STORE_LOADER_CTX *ctx, const char *name)
- {
- const char *p = NULL;
- /* If there are no search criteria, all names are accepted */
- if (ctx->_.dir.search_name[0] == '\0')
- return 1;
- /* If the expected type isn't supported, no name is accepted */
- if (ctx->expected_type != 0
- && ctx->expected_type != OSSL_STORE_INFO_CERT
- && ctx->expected_type != OSSL_STORE_INFO_CRL)
- return 0;
- /*
- * First, check the basename
- */
- if (strncasecmp(name, ctx->_.dir.search_name,
- sizeof(ctx->_.dir.search_name) - 1) != 0
- || name[sizeof(ctx->_.dir.search_name) - 1] != '.')
- return 0;
- p = &name[sizeof(ctx->_.dir.search_name)];
- /*
- * Then, if the expected type is a CRL, check that the extension starts
- * with 'r'
- */
- if (*p == 'r') {
- p++;
- if (ctx->expected_type != 0
- && ctx->expected_type != OSSL_STORE_INFO_CRL)
- return 0;
- } else if (ctx->expected_type == OSSL_STORE_INFO_CRL) {
- return 0;
- }
- /*
- * Last, check that the rest of the extension is a decimal number, at
- * least one digit long.
- */
- if (!ossl_isdigit(*p))
- return 0;
- while (ossl_isdigit(*p))
- p++;
- # ifdef __VMS
- /*
- * One extra step here, check for a possible generation number.
- */
- if (*p == ';')
- for (p++; *p != '\0'; p++)
- if (!ossl_isdigit(*p))
- break;
- # endif
- /*
- * If we've reached the end of the string at this point, we've successfully
- * found a fitting file name.
- */
- return *p == '\0';
- }
- static int file_eof(OSSL_STORE_LOADER_CTX *ctx);
- static int file_error(OSSL_STORE_LOADER_CTX *ctx);
- static OSSL_STORE_INFO *file_load(OSSL_STORE_LOADER_CTX *ctx,
- const UI_METHOD *ui_method, void *ui_data)
- {
- OSSL_STORE_INFO *result = NULL;
- ctx->errcnt = 0;
- ERR_clear_error();
- if (ctx->type == is_dir) {
- do {
- char *newname = NULL;
- if (ctx->_.dir.last_entry == NULL) {
- if (!ctx->_.dir.end_reached) {
- char errbuf[256];
- assert(ctx->_.dir.last_errno != 0);
- errno = ctx->_.dir.last_errno;
- ctx->errcnt++;
- openssl_strerror_r(errno, errbuf, sizeof(errbuf));
- OSSL_STOREerr(OSSL_STORE_F_FILE_LOAD, ERR_R_SYS_LIB);
- ERR_add_error_data(1, errbuf);
- }
- return NULL;
- }
- if (ctx->_.dir.last_entry[0] != '.'
- && file_name_check(ctx, ctx->_.dir.last_entry)
- && !file_name_to_uri(ctx, ctx->_.dir.last_entry, &newname))
- return NULL;
- /*
- * On the first call (with a NULL context), OPENSSL_DIR_read()
- * cares about the second argument. On the following calls, it
- * only cares that it isn't NULL. Therefore, we can safely give
- * it our URI here.
- */
- ctx->_.dir.last_entry = OPENSSL_DIR_read(&ctx->_.dir.ctx,
- ctx->_.dir.uri);
- ctx->_.dir.last_errno = errno;
- if (ctx->_.dir.last_entry == NULL && ctx->_.dir.last_errno == 0)
- ctx->_.dir.end_reached = 1;
- if (newname != NULL
- && (result = OSSL_STORE_INFO_new_NAME(newname)) == NULL) {
- OPENSSL_free(newname);
- OSSL_STOREerr(OSSL_STORE_F_FILE_LOAD, ERR_R_OSSL_STORE_LIB);
- return NULL;
- }
- } while (result == NULL && !file_eof(ctx));
- } else {
- int matchcount = -1;
- again:
- result = file_load_try_repeat(ctx, ui_method, ui_data);
- if (result != NULL)
- return result;
- if (file_eof(ctx))
- return NULL;
- do {
- char *pem_name = NULL; /* PEM record name */
- char *pem_header = NULL; /* PEM record header */
- unsigned char *data = NULL; /* DER encoded data */
- long len = 0; /* DER encoded data length */
- matchcount = -1;
- if (ctx->type == is_pem) {
- if (!file_read_pem(ctx->_.file.file, &pem_name, &pem_header,
- &data, &len, ui_method, ui_data,
- (ctx->flags & FILE_FLAG_SECMEM) != 0)) {
- ctx->errcnt++;
- goto endloop;
- }
- } else {
- if (!file_read_asn1(ctx->_.file.file, &data, &len)) {
- ctx->errcnt++;
- goto endloop;
- }
- }
- result = file_load_try_decode(ctx, pem_name, pem_header, data, len,
- ui_method, ui_data, &matchcount);
- if (result != NULL)
- goto endloop;
- /*
- * If a PEM name matches more than one handler, the handlers are
- * badly coded.
- */
- if (!ossl_assert(pem_name == NULL || matchcount <= 1)) {
- ctx->errcnt++;
- goto endloop;
- }
- if (matchcount > 1) {
- OSSL_STOREerr(OSSL_STORE_F_FILE_LOAD,
- OSSL_STORE_R_AMBIGUOUS_CONTENT_TYPE);
- } else if (matchcount == 1) {
- /*
- * If there are other errors on the stack, they already show
- * what the problem is.
- */
- if (ERR_peek_error() == 0) {
- OSSL_STOREerr(OSSL_STORE_F_FILE_LOAD,
- OSSL_STORE_R_UNSUPPORTED_CONTENT_TYPE);
- if (pem_name != NULL)
- ERR_add_error_data(3, "PEM type is '", pem_name, "'");
- }
- }
- if (matchcount > 0)
- ctx->errcnt++;
- endloop:
- pem_free_flag(pem_name, (ctx->flags & FILE_FLAG_SECMEM) != 0, 0);
- pem_free_flag(pem_header, (ctx->flags & FILE_FLAG_SECMEM) != 0, 0);
- pem_free_flag(data, (ctx->flags & FILE_FLAG_SECMEM) != 0, len);
- } while (matchcount == 0 && !file_eof(ctx) && !file_error(ctx));
- /* We bail out on ambiguity */
- if (matchcount > 1)
- return NULL;
- if (result != NULL
- && ctx->expected_type != 0
- && ctx->expected_type != OSSL_STORE_INFO_get_type(result)) {
- OSSL_STORE_INFO_free(result);
- goto again;
- }
- }
- return result;
- }
- static int file_error(OSSL_STORE_LOADER_CTX *ctx)
- {
- return ctx->errcnt > 0;
- }
- static int file_eof(OSSL_STORE_LOADER_CTX *ctx)
- {
- if (ctx->type == is_dir)
- return ctx->_.dir.end_reached;
- if (ctx->_.file.last_handler != NULL
- && !ctx->_.file.last_handler->eof(ctx->_.file.last_handler_ctx))
- return 0;
- return BIO_eof(ctx->_.file.file);
- }
- static int file_close(OSSL_STORE_LOADER_CTX *ctx)
- {
- if (ctx->type == is_dir) {
- OPENSSL_DIR_end(&ctx->_.dir.ctx);
- } else {
- BIO_free_all(ctx->_.file.file);
- }
- OSSL_STORE_LOADER_CTX_free(ctx);
- return 1;
- }
- int ossl_store_file_detach_pem_bio_int(OSSL_STORE_LOADER_CTX *ctx)
- {
- OSSL_STORE_LOADER_CTX_free(ctx);
- return 1;
- }
- static OSSL_STORE_LOADER file_loader =
- {
- "file",
- NULL,
- file_open,
- file_ctrl,
- file_expect,
- file_find,
- file_load,
- file_eof,
- file_error,
- file_close
- };
- static void store_file_loader_deinit(void)
- {
- ossl_store_unregister_loader_int(file_loader.scheme);
- }
- int ossl_store_file_loader_init(void)
- {
- int ret = ossl_store_register_loader_int(&file_loader);
- OPENSSL_atexit(store_file_loader_deinit);
- return ret;
- }
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