mirror of
https://github.com/openssl/openssl.git
synced 2024-12-15 06:01:37 +08:00
e2f69d435b
Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Hugo Landau <hlandau@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/22504)
(cherry picked from commit f0d88b4d07
)
1495 lines
51 KiB
C
1495 lines
51 KiB
C
/*
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* Copyright 2001-2023 The OpenSSL Project Authors. All Rights Reserved.
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* Copyright Siemens AG 2018-2020
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include "internal/e_os.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include "crypto/ctype.h"
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#include <string.h>
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#include <openssl/asn1.h>
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#include <openssl/evp.h>
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#include <openssl/err.h>
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#include <openssl/httperr.h>
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#include <openssl/cmperr.h>
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#include <openssl/buffer.h>
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#include <openssl/http.h>
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#include <openssl/trace.h>
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#include "internal/sockets.h"
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#include "internal/common.h" /* for ossl_assert() */
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#define HTTP_PREFIX "HTTP/"
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#define HTTP_VERSION_PATT "1." /* allow 1.x */
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#define HTTP_VERSION_STR_LEN sizeof(HTTP_VERSION_PATT) /* == strlen("1.0") */
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#define HTTP_PREFIX_VERSION HTTP_PREFIX""HTTP_VERSION_PATT
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#define HTTP_1_0 HTTP_PREFIX_VERSION"0" /* "HTTP/1.0" */
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#define HTTP_LINE1_MINLEN (sizeof(HTTP_PREFIX_VERSION "x 200\n") - 1)
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#define HTTP_VERSION_MAX_REDIRECTIONS 50
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#define HTTP_STATUS_CODE_OK 200
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#define HTTP_STATUS_CODE_MOVED_PERMANENTLY 301
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#define HTTP_STATUS_CODE_FOUND 302
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/* Stateful HTTP request code, supporting blocking and non-blocking I/O */
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/* Opaque HTTP request status structure */
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struct ossl_http_req_ctx_st {
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int state; /* Current I/O state */
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unsigned char *buf; /* Buffer to write request or read response */
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int buf_size; /* Buffer size */
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int free_wbio; /* wbio allocated internally, free with ctx */
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BIO *wbio; /* BIO to write/send request to */
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BIO *rbio; /* BIO to read/receive response from */
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OSSL_HTTP_bio_cb_t upd_fn; /* Optional BIO update callback used for TLS */
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void *upd_arg; /* Optional arg for update callback function */
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int use_ssl; /* Use HTTPS */
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char *proxy; /* Optional proxy name or URI */
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char *server; /* Optional server hostname */
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char *port; /* Optional server port */
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BIO *mem; /* Mem BIO holding request header or response */
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BIO *req; /* BIO holding the request provided by caller */
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int method_POST; /* HTTP method is POST (else GET) */
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int text; /* Request content type is (likely) text */
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char *expected_ct; /* Optional expected Content-Type */
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int expect_asn1; /* Response must be ASN.1-encoded */
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unsigned char *pos; /* Current position sending data */
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long len_to_send; /* Number of bytes still to send */
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size_t resp_len; /* Length of response */
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size_t max_resp_len; /* Maximum length of response, or 0 */
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int keep_alive; /* Persistent conn. 0=no, 1=prefer, 2=require */
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time_t max_time; /* Maximum end time of current transfer, or 0 */
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time_t max_total_time; /* Maximum end time of total transfer, or 0 */
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char *redirection_url; /* Location obtained from HTTP status 301/302 */
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};
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/* HTTP states */
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#define OHS_NOREAD 0x1000 /* If set no reading should be performed */
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#define OHS_ERROR (0 | OHS_NOREAD) /* Error condition */
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#define OHS_ADD_HEADERS (1 | OHS_NOREAD) /* Adding header lines to request */
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#define OHS_WRITE_INIT (2 | OHS_NOREAD) /* 1st call: ready to start send */
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#define OHS_WRITE_HDR1 (3 | OHS_NOREAD) /* Request header to be sent */
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#define OHS_WRITE_HDR (4 | OHS_NOREAD) /* Request header being sent */
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#define OHS_WRITE_REQ (5 | OHS_NOREAD) /* Request content being sent */
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#define OHS_FLUSH (6 | OHS_NOREAD) /* Request being flushed */
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#define OHS_FIRSTLINE 1 /* First line of response being read */
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#define OHS_HEADERS 2 /* MIME headers of response being read */
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#define OHS_HEADERS_ERROR 3 /* MIME headers of resp. being read after error */
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#define OHS_REDIRECT 4 /* MIME headers being read, expecting Location */
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#define OHS_ASN1_HEADER 5 /* ASN1 sequence header (tag+length) being read */
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#define OHS_ASN1_CONTENT 6 /* ASN1 content octets being read */
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#define OHS_ASN1_DONE (7 | OHS_NOREAD) /* ASN1 content read completed */
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#define OHS_STREAM (8 | OHS_NOREAD) /* HTTP content stream to be read */
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/* Low-level HTTP API implementation */
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OSSL_HTTP_REQ_CTX *OSSL_HTTP_REQ_CTX_new(BIO *wbio, BIO *rbio, int buf_size)
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{
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OSSL_HTTP_REQ_CTX *rctx;
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if (wbio == NULL || rbio == NULL) {
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ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER);
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return NULL;
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}
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if ((rctx = OPENSSL_zalloc(sizeof(*rctx))) == NULL)
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return NULL;
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rctx->state = OHS_ERROR;
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rctx->buf_size = buf_size > 0 ? buf_size : OSSL_HTTP_DEFAULT_MAX_LINE_LEN;
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rctx->buf = OPENSSL_malloc(rctx->buf_size);
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rctx->wbio = wbio;
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rctx->rbio = rbio;
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if (rctx->buf == NULL) {
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OPENSSL_free(rctx);
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return NULL;
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}
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rctx->max_resp_len = OSSL_HTTP_DEFAULT_MAX_RESP_LEN;
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/* everything else is 0, e.g. rctx->len_to_send, or NULL, e.g. rctx->mem */
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return rctx;
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}
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void OSSL_HTTP_REQ_CTX_free(OSSL_HTTP_REQ_CTX *rctx)
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{
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if (rctx == NULL)
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return;
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/*
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* Use BIO_free_all() because bio_update_fn may prepend or append to cbio.
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* This also frees any (e.g., SSL/TLS) BIOs linked with bio and,
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* like BIO_reset(bio), calls SSL_shutdown() to notify/alert the peer.
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*/
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if (rctx->free_wbio)
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BIO_free_all(rctx->wbio);
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/* do not free rctx->rbio */
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BIO_free(rctx->mem);
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BIO_free(rctx->req);
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OPENSSL_free(rctx->buf);
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OPENSSL_free(rctx->proxy);
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OPENSSL_free(rctx->server);
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OPENSSL_free(rctx->port);
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OPENSSL_free(rctx->expected_ct);
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OPENSSL_free(rctx);
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}
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BIO *OSSL_HTTP_REQ_CTX_get0_mem_bio(const OSSL_HTTP_REQ_CTX *rctx)
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{
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if (rctx == NULL) {
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ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER);
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return NULL;
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}
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return rctx->mem;
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}
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size_t OSSL_HTTP_REQ_CTX_get_resp_len(const OSSL_HTTP_REQ_CTX *rctx)
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{
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if (rctx == NULL) {
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ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER);
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return 0;
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}
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return rctx->resp_len;
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}
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void OSSL_HTTP_REQ_CTX_set_max_response_length(OSSL_HTTP_REQ_CTX *rctx,
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unsigned long len)
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{
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if (rctx == NULL) {
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ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER);
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return;
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}
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rctx->max_resp_len = len != 0 ? (size_t)len : OSSL_HTTP_DEFAULT_MAX_RESP_LEN;
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}
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/*
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* Create request line using |rctx| and |path| (or "/" in case |path| is NULL).
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* Server name (and optional port) must be given if and only if
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* a plain HTTP proxy is used and |path| does not begin with 'http://'.
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*/
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int OSSL_HTTP_REQ_CTX_set_request_line(OSSL_HTTP_REQ_CTX *rctx, int method_POST,
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const char *server, const char *port,
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const char *path)
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{
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if (rctx == NULL) {
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ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER);
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return 0;
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}
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BIO_free(rctx->mem);
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if ((rctx->mem = BIO_new(BIO_s_mem())) == NULL)
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return 0;
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rctx->method_POST = method_POST != 0;
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if (BIO_printf(rctx->mem, "%s ", rctx->method_POST ? "POST" : "GET") <= 0)
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return 0;
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if (server != NULL) { /* HTTP (but not HTTPS) proxy is used */
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/*
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* Section 5.1.2 of RFC 1945 states that the absoluteURI form is only
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* allowed when using a proxy
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*/
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if (BIO_printf(rctx->mem, OSSL_HTTP_PREFIX"%s", server) <= 0)
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return 0;
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if (port != NULL && BIO_printf(rctx->mem, ":%s", port) <= 0)
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return 0;
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}
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/* Make sure path includes a forward slash (abs_path) */
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if (path == NULL) {
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path = "/";
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} else if (HAS_PREFIX(path, "http://")) { /* absoluteURI for proxy use */
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if (server != NULL) {
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ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_INVALID_ARGUMENT);
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return 0;
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}
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} else if (path[0] != '/' && BIO_printf(rctx->mem, "/") <= 0) {
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return 0;
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}
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/*
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* Add (the rest of) the path and the HTTP version,
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* which is fixed to 1.0 for straightforward implementation of keep-alive
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*/
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if (BIO_printf(rctx->mem, "%s "HTTP_1_0"\r\n", path) <= 0)
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return 0;
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rctx->resp_len = 0;
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rctx->state = OHS_ADD_HEADERS;
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return 1;
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}
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int OSSL_HTTP_REQ_CTX_add1_header(OSSL_HTTP_REQ_CTX *rctx,
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const char *name, const char *value)
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{
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if (rctx == NULL || name == NULL) {
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ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER);
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return 0;
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}
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if (rctx->mem == NULL) {
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ERR_raise(ERR_LIB_HTTP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
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return 0;
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}
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if (BIO_puts(rctx->mem, name) <= 0)
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return 0;
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if (value != NULL) {
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if (BIO_write(rctx->mem, ": ", 2) != 2)
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return 0;
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if (BIO_puts(rctx->mem, value) <= 0)
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return 0;
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}
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return BIO_write(rctx->mem, "\r\n", 2) == 2;
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}
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int OSSL_HTTP_REQ_CTX_set_expected(OSSL_HTTP_REQ_CTX *rctx,
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const char *content_type, int asn1,
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int timeout, int keep_alive)
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{
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if (rctx == NULL) {
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ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER);
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return 0;
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}
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if (keep_alive != 0
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&& rctx->state != OHS_ERROR && rctx->state != OHS_ADD_HEADERS) {
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/* Cannot anymore set keep-alive in request header */
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ERR_raise(ERR_LIB_HTTP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
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return 0;
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}
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OPENSSL_free(rctx->expected_ct);
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rctx->expected_ct = NULL;
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if (content_type != NULL
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&& (rctx->expected_ct = OPENSSL_strdup(content_type)) == NULL)
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return 0;
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rctx->expect_asn1 = asn1;
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if (timeout >= 0)
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rctx->max_time = timeout > 0 ? time(NULL) + timeout : 0;
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else /* take over any |overall_timeout| arg of OSSL_HTTP_open(), else 0 */
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rctx->max_time = rctx->max_total_time;
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rctx->keep_alive = keep_alive;
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return 1;
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}
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static int set1_content(OSSL_HTTP_REQ_CTX *rctx,
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const char *content_type, BIO *req)
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{
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long req_len = 0;
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#ifndef OPENSSL_NO_STDIO
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FILE *fp = NULL;
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#endif
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if (rctx == NULL || (req == NULL && content_type != NULL)) {
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ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER);
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return 0;
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}
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if (rctx->keep_alive != 0
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&& !OSSL_HTTP_REQ_CTX_add1_header(rctx, "Connection", "keep-alive"))
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return 0;
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BIO_free(rctx->req);
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rctx->req = NULL;
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if (req == NULL)
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return 1;
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if (!rctx->method_POST) {
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ERR_raise(ERR_LIB_HTTP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
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return 0;
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}
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if (content_type == NULL) {
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rctx->text = 1; /* assuming text by default, used just for tracing */
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} else {
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if (OPENSSL_strncasecmp(content_type, "text/", 5) == 0)
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rctx->text = 1;
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if (BIO_printf(rctx->mem, "Content-Type: %s\r\n", content_type) <= 0)
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return 0;
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}
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/*
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* BIO_CTRL_INFO yields the data length at least for memory BIOs, but for
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* file-based BIOs it gives the current position, which is not what we need.
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*/
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if (BIO_method_type(req) == BIO_TYPE_FILE) {
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#ifndef OPENSSL_NO_STDIO
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if (BIO_get_fp(req, &fp) == 1 && fseek(fp, 0, SEEK_END) == 0) {
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req_len = ftell(fp);
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(void)fseek(fp, 0, SEEK_SET);
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} else {
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fp = NULL;
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}
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#endif
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} else {
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req_len = BIO_ctrl(req, BIO_CTRL_INFO, 0, NULL);
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/*
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* Streaming BIOs likely will not support querying the size at all,
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* and we assume we got a correct value if req_len > 0.
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*/
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}
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if ((
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#ifndef OPENSSL_NO_STDIO
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fp != NULL /* definitely correct req_len */ ||
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#endif
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req_len > 0)
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&& BIO_printf(rctx->mem, "Content-Length: %ld\r\n", req_len) < 0)
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return 0;
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if (!BIO_up_ref(req))
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return 0;
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rctx->req = req;
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return 1;
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}
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int OSSL_HTTP_REQ_CTX_set1_req(OSSL_HTTP_REQ_CTX *rctx, const char *content_type,
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const ASN1_ITEM *it, const ASN1_VALUE *req)
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{
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BIO *mem = NULL;
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int res = 1;
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if (req != NULL)
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res = (mem = ASN1_item_i2d_mem_bio(it, req)) != NULL;
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res = res && set1_content(rctx, content_type, mem);
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BIO_free(mem);
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return res;
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}
|
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static int add1_headers(OSSL_HTTP_REQ_CTX *rctx,
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const STACK_OF(CONF_VALUE) *headers, const char *host)
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{
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int i;
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int add_host = host != NULL && *host != '\0';
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CONF_VALUE *hdr;
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for (i = 0; i < sk_CONF_VALUE_num(headers); i++) {
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hdr = sk_CONF_VALUE_value(headers, i);
|
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if (add_host && OPENSSL_strcasecmp("host", hdr->name) == 0)
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add_host = 0;
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if (!OSSL_HTTP_REQ_CTX_add1_header(rctx, hdr->name, hdr->value))
|
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return 0;
|
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}
|
|
|
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if (add_host && !OSSL_HTTP_REQ_CTX_add1_header(rctx, "Host", host))
|
|
return 0;
|
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return 1;
|
|
}
|
|
|
|
/* Create OSSL_HTTP_REQ_CTX structure using the values provided. */
|
|
static OSSL_HTTP_REQ_CTX *http_req_ctx_new(int free_wbio, BIO *wbio, BIO *rbio,
|
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OSSL_HTTP_bio_cb_t bio_update_fn,
|
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void *arg, int use_ssl,
|
|
const char *proxy,
|
|
const char *server, const char *port,
|
|
int buf_size, int overall_timeout)
|
|
{
|
|
OSSL_HTTP_REQ_CTX *rctx = OSSL_HTTP_REQ_CTX_new(wbio, rbio, buf_size);
|
|
|
|
if (rctx == NULL)
|
|
return NULL;
|
|
rctx->free_wbio = free_wbio;
|
|
rctx->upd_fn = bio_update_fn;
|
|
rctx->upd_arg = arg;
|
|
rctx->use_ssl = use_ssl;
|
|
if (proxy != NULL
|
|
&& (rctx->proxy = OPENSSL_strdup(proxy)) == NULL)
|
|
goto err;
|
|
if (server != NULL
|
|
&& (rctx->server = OPENSSL_strdup(server)) == NULL)
|
|
goto err;
|
|
if (port != NULL
|
|
&& (rctx->port = OPENSSL_strdup(port)) == NULL)
|
|
goto err;
|
|
rctx->max_total_time =
|
|
overall_timeout > 0 ? time(NULL) + overall_timeout : 0;
|
|
return rctx;
|
|
|
|
err:
|
|
OSSL_HTTP_REQ_CTX_free(rctx);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Parse first HTTP response line. This should be like this: "HTTP/1.0 200 OK".
|
|
* We need to obtain the status code and (optional) informational message.
|
|
* Return any received HTTP response status code, or 0 on fatal error.
|
|
*/
|
|
|
|
static int parse_http_line1(char *line, int *found_keep_alive)
|
|
{
|
|
int i, retcode, err;
|
|
char *code, *reason, *end;
|
|
|
|
if (!CHECK_AND_SKIP_PREFIX(line, HTTP_PREFIX_VERSION))
|
|
goto err;
|
|
/* above HTTP 1.0, connection persistence is the default */
|
|
*found_keep_alive = *line > '0';
|
|
|
|
/* Skip to first whitespace (past protocol info) */
|
|
for (code = line; *code != '\0' && !ossl_isspace(*code); code++)
|
|
continue;
|
|
if (*code == '\0')
|
|
goto err;
|
|
|
|
/* Skip past whitespace to start of response code */
|
|
while (*code != '\0' && ossl_isspace(*code))
|
|
code++;
|
|
if (*code == '\0')
|
|
goto err;
|
|
|
|
/* Find end of response code: first whitespace after start of code */
|
|
for (reason = code; *reason != '\0' && !ossl_isspace(*reason); reason++)
|
|
continue;
|
|
|
|
if (*reason == '\0')
|
|
goto err;
|
|
|
|
/* Set end of response code and start of message */
|
|
*reason++ = '\0';
|
|
|
|
/* Attempt to parse numeric code */
|
|
retcode = strtoul(code, &end, 10);
|
|
if (*end != '\0')
|
|
goto err;
|
|
|
|
/* Skip over any leading whitespace in message */
|
|
while (*reason != '\0' && ossl_isspace(*reason))
|
|
reason++;
|
|
|
|
if (*reason != '\0') {
|
|
/*
|
|
* Finally zap any trailing whitespace in message (include CRLF)
|
|
*/
|
|
|
|
/* chop any trailing whitespace from reason */
|
|
/* We know reason has a non-whitespace character so this is OK */
|
|
for (end = reason + strlen(reason) - 1; ossl_isspace(*end); end--)
|
|
*end = '\0';
|
|
}
|
|
|
|
switch (retcode) {
|
|
case HTTP_STATUS_CODE_OK:
|
|
case HTTP_STATUS_CODE_MOVED_PERMANENTLY:
|
|
case HTTP_STATUS_CODE_FOUND:
|
|
return retcode;
|
|
default:
|
|
err = HTTP_R_RECEIVED_ERROR;
|
|
if (retcode < 400)
|
|
err = HTTP_R_STATUS_CODE_UNSUPPORTED;
|
|
if (*reason == '\0')
|
|
ERR_raise_data(ERR_LIB_HTTP, err, "code=%s", code);
|
|
else
|
|
ERR_raise_data(ERR_LIB_HTTP, err, "code=%s, reason=%s", code,
|
|
reason);
|
|
return retcode;
|
|
}
|
|
|
|
err:
|
|
for (i = 0; i < 60 && line[i] != '\0'; i++)
|
|
if (!ossl_isprint(line[i]))
|
|
line[i] = ' ';
|
|
line[i] = '\0';
|
|
ERR_raise_data(ERR_LIB_HTTP, HTTP_R_HEADER_PARSE_ERROR, "content=%s", line);
|
|
return 0;
|
|
}
|
|
|
|
static int check_set_resp_len(OSSL_HTTP_REQ_CTX *rctx, size_t len)
|
|
{
|
|
if (rctx->max_resp_len != 0 && len > rctx->max_resp_len) {
|
|
ERR_raise_data(ERR_LIB_HTTP, HTTP_R_MAX_RESP_LEN_EXCEEDED,
|
|
"length=%zu, max=%zu", len, rctx->max_resp_len);
|
|
return 0;
|
|
}
|
|
if (rctx->resp_len != 0 && rctx->resp_len != len) {
|
|
ERR_raise_data(ERR_LIB_HTTP, HTTP_R_INCONSISTENT_CONTENT_LENGTH,
|
|
"ASN.1 length=%zu, Content-Length=%zu",
|
|
len, rctx->resp_len);
|
|
return 0;
|
|
}
|
|
rctx->resp_len = len;
|
|
return 1;
|
|
}
|
|
|
|
static int may_still_retry(time_t max_time, int *ptimeout)
|
|
{
|
|
time_t time_diff, now = time(NULL);
|
|
|
|
if (max_time != 0) {
|
|
if (max_time < now) {
|
|
ERR_raise(ERR_LIB_HTTP, HTTP_R_RETRY_TIMEOUT);
|
|
return 0;
|
|
}
|
|
time_diff = max_time - now;
|
|
*ptimeout = time_diff > INT_MAX ? INT_MAX : (int)time_diff;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Try exchanging request and response via HTTP on (non-)blocking BIO in rctx.
|
|
* Returns 1 on success, 0 on error or redirection, -1 on BIO_should_retry.
|
|
*/
|
|
int OSSL_HTTP_REQ_CTX_nbio(OSSL_HTTP_REQ_CTX *rctx)
|
|
{
|
|
int i, found_expected_ct = 0, found_keep_alive = 0;
|
|
int got_text = 1;
|
|
long n;
|
|
size_t resp_len;
|
|
const unsigned char *p;
|
|
char *buf, *key, *value, *line_end = NULL;
|
|
|
|
if (rctx == NULL) {
|
|
ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER);
|
|
return 0;
|
|
}
|
|
if (rctx->mem == NULL || rctx->wbio == NULL || rctx->rbio == NULL) {
|
|
ERR_raise(ERR_LIB_HTTP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
|
|
return 0;
|
|
}
|
|
|
|
rctx->redirection_url = NULL;
|
|
next_io:
|
|
buf = (char *)rctx->buf;
|
|
if ((rctx->state & OHS_NOREAD) == 0) {
|
|
if (rctx->expect_asn1) {
|
|
n = BIO_read(rctx->rbio, rctx->buf, rctx->buf_size);
|
|
} else {
|
|
(void)ERR_set_mark();
|
|
n = BIO_gets(rctx->rbio, buf, rctx->buf_size);
|
|
if (n == -2) { /* some BIOs, such as SSL, do not support "gets" */
|
|
(void)ERR_pop_to_mark();
|
|
n = BIO_get_line(rctx->rbio, buf, rctx->buf_size);
|
|
} else {
|
|
(void)ERR_clear_last_mark();
|
|
}
|
|
}
|
|
if (n <= 0) {
|
|
if (BIO_should_retry(rctx->rbio))
|
|
return -1;
|
|
ERR_raise(ERR_LIB_HTTP, HTTP_R_FAILED_READING_DATA);
|
|
return 0;
|
|
}
|
|
|
|
/* Write data to memory BIO */
|
|
if (BIO_write(rctx->mem, rctx->buf, n) != n)
|
|
return 0;
|
|
}
|
|
|
|
switch (rctx->state) {
|
|
case OHS_ADD_HEADERS:
|
|
/* Last operation was adding headers: need a final \r\n */
|
|
if (BIO_write(rctx->mem, "\r\n", 2) != 2) {
|
|
rctx->state = OHS_ERROR;
|
|
return 0;
|
|
}
|
|
rctx->state = OHS_WRITE_INIT;
|
|
|
|
/* fall through */
|
|
case OHS_WRITE_INIT:
|
|
rctx->len_to_send = BIO_get_mem_data(rctx->mem, &rctx->pos);
|
|
rctx->state = OHS_WRITE_HDR1;
|
|
|
|
/* fall through */
|
|
case OHS_WRITE_HDR1:
|
|
case OHS_WRITE_HDR:
|
|
/* Copy some chunk of data from rctx->mem to rctx->wbio */
|
|
case OHS_WRITE_REQ:
|
|
/* Copy some chunk of data from rctx->req to rctx->wbio */
|
|
|
|
if (rctx->len_to_send > 0) {
|
|
size_t sz;
|
|
|
|
if (!BIO_write_ex(rctx->wbio, rctx->pos, rctx->len_to_send, &sz)) {
|
|
if (BIO_should_retry(rctx->wbio))
|
|
return -1;
|
|
rctx->state = OHS_ERROR;
|
|
return 0;
|
|
}
|
|
if (OSSL_TRACE_ENABLED(HTTP) && rctx->state == OHS_WRITE_HDR1)
|
|
OSSL_TRACE(HTTP, "Sending request: [\n");
|
|
OSSL_TRACE_STRING(HTTP, rctx->state != OHS_WRITE_REQ || rctx->text,
|
|
rctx->state != OHS_WRITE_REQ, rctx->pos, sz);
|
|
if (rctx->state == OHS_WRITE_HDR1)
|
|
rctx->state = OHS_WRITE_HDR;
|
|
rctx->pos += sz;
|
|
rctx->len_to_send -= sz;
|
|
goto next_io;
|
|
}
|
|
if (rctx->state == OHS_WRITE_HDR) {
|
|
(void)BIO_reset(rctx->mem);
|
|
rctx->state = OHS_WRITE_REQ;
|
|
}
|
|
if (rctx->req != NULL && !BIO_eof(rctx->req)) {
|
|
n = BIO_read(rctx->req, rctx->buf, rctx->buf_size);
|
|
if (n <= 0) {
|
|
if (BIO_should_retry(rctx->req))
|
|
return -1;
|
|
ERR_raise(ERR_LIB_HTTP, HTTP_R_FAILED_READING_DATA);
|
|
return 0;
|
|
}
|
|
rctx->pos = rctx->buf;
|
|
rctx->len_to_send = n;
|
|
goto next_io;
|
|
}
|
|
if (OSSL_TRACE_ENABLED(HTTP))
|
|
OSSL_TRACE(HTTP, "]\n");
|
|
rctx->state = OHS_FLUSH;
|
|
|
|
/* fall through */
|
|
case OHS_FLUSH:
|
|
|
|
i = BIO_flush(rctx->wbio);
|
|
|
|
if (i > 0) {
|
|
rctx->state = OHS_FIRSTLINE;
|
|
goto next_io;
|
|
}
|
|
|
|
if (BIO_should_retry(rctx->wbio))
|
|
return -1;
|
|
|
|
rctx->state = OHS_ERROR;
|
|
return 0;
|
|
|
|
case OHS_ERROR:
|
|
return 0;
|
|
|
|
case OHS_FIRSTLINE:
|
|
case OHS_HEADERS:
|
|
case OHS_REDIRECT:
|
|
|
|
/* Attempt to read a line in */
|
|
next_line:
|
|
/*
|
|
* Due to strange memory BIO behavior with BIO_gets we have to check
|
|
* there's a complete line in there before calling BIO_gets or we'll
|
|
* just get a partial read.
|
|
*/
|
|
n = BIO_get_mem_data(rctx->mem, &p);
|
|
if (n <= 0 || memchr(p, '\n', n) == 0) {
|
|
if (n >= rctx->buf_size) {
|
|
rctx->state = OHS_ERROR;
|
|
return 0;
|
|
}
|
|
goto next_io;
|
|
}
|
|
n = BIO_gets(rctx->mem, buf, rctx->buf_size);
|
|
|
|
if (n <= 0) {
|
|
if (BIO_should_retry(rctx->mem))
|
|
goto next_io;
|
|
rctx->state = OHS_ERROR;
|
|
return 0;
|
|
}
|
|
|
|
/* Don't allow excessive lines */
|
|
if (n == rctx->buf_size) {
|
|
ERR_raise(ERR_LIB_HTTP, HTTP_R_RESPONSE_LINE_TOO_LONG);
|
|
rctx->state = OHS_ERROR;
|
|
return 0;
|
|
}
|
|
|
|
/* dump all response header lines */
|
|
if (OSSL_TRACE_ENABLED(HTTP)) {
|
|
if (rctx->state == OHS_FIRSTLINE)
|
|
OSSL_TRACE(HTTP, "Received response header: [\n");
|
|
OSSL_TRACE1(HTTP, "%s", buf);
|
|
}
|
|
|
|
/* First line */
|
|
if (rctx->state == OHS_FIRSTLINE) {
|
|
switch (parse_http_line1(buf, &found_keep_alive)) {
|
|
case HTTP_STATUS_CODE_OK:
|
|
rctx->state = OHS_HEADERS;
|
|
goto next_line;
|
|
case HTTP_STATUS_CODE_MOVED_PERMANENTLY:
|
|
case HTTP_STATUS_CODE_FOUND: /* i.e., moved temporarily */
|
|
if (!rctx->method_POST) { /* method is GET */
|
|
rctx->state = OHS_REDIRECT;
|
|
goto next_line;
|
|
}
|
|
ERR_raise(ERR_LIB_HTTP, HTTP_R_REDIRECTION_NOT_ENABLED);
|
|
/* redirection is not supported/recommended for POST */
|
|
/* fall through */
|
|
default:
|
|
rctx->state = OHS_HEADERS_ERROR;
|
|
goto next_line; /* continue parsing and reporting header */
|
|
}
|
|
}
|
|
key = buf;
|
|
value = strchr(key, ':');
|
|
if (value != NULL) {
|
|
*(value++) = '\0';
|
|
while (ossl_isspace(*value))
|
|
value++;
|
|
line_end = strchr(value, '\r');
|
|
if (line_end == NULL)
|
|
line_end = strchr(value, '\n');
|
|
if (line_end != NULL)
|
|
*line_end = '\0';
|
|
}
|
|
if (value != NULL && line_end != NULL) {
|
|
if (rctx->state == OHS_REDIRECT
|
|
&& OPENSSL_strcasecmp(key, "Location") == 0) {
|
|
rctx->redirection_url = value;
|
|
return 0;
|
|
}
|
|
if (OPENSSL_strcasecmp(key, "Content-Type") == 0) {
|
|
got_text = OPENSSL_strncasecmp(value, "text/", 5) == 0;
|
|
if (rctx->state == OHS_HEADERS
|
|
&& rctx->expected_ct != NULL) {
|
|
const char *semicolon;
|
|
|
|
if (OPENSSL_strcasecmp(rctx->expected_ct, value) != 0
|
|
/* ignore past ';' unless expected_ct contains ';' */
|
|
&& (strchr(rctx->expected_ct, ';') != NULL
|
|
|| (semicolon = strchr(value, ';')) == NULL
|
|
|| (size_t)(semicolon - value) != strlen(rctx->expected_ct)
|
|
|| OPENSSL_strncasecmp(rctx->expected_ct, value,
|
|
semicolon - value) != 0)) {
|
|
ERR_raise_data(ERR_LIB_HTTP,
|
|
HTTP_R_UNEXPECTED_CONTENT_TYPE,
|
|
"expected=%s, actual=%s",
|
|
rctx->expected_ct, value);
|
|
return 0;
|
|
}
|
|
found_expected_ct = 1;
|
|
}
|
|
}
|
|
|
|
/* https://tools.ietf.org/html/rfc7230#section-6.3 Persistence */
|
|
if (OPENSSL_strcasecmp(key, "Connection") == 0) {
|
|
if (OPENSSL_strcasecmp(value, "keep-alive") == 0)
|
|
found_keep_alive = 1;
|
|
else if (OPENSSL_strcasecmp(value, "close") == 0)
|
|
found_keep_alive = 0;
|
|
} else if (OPENSSL_strcasecmp(key, "Content-Length") == 0) {
|
|
resp_len = (size_t)strtoul(value, &line_end, 10);
|
|
if (line_end == value || *line_end != '\0') {
|
|
ERR_raise_data(ERR_LIB_HTTP,
|
|
HTTP_R_ERROR_PARSING_CONTENT_LENGTH,
|
|
"input=%s", value);
|
|
return 0;
|
|
}
|
|
if (!check_set_resp_len(rctx, resp_len))
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Look for blank line indicating end of headers */
|
|
for (p = rctx->buf; *p != '\0'; p++) {
|
|
if (*p != '\r' && *p != '\n')
|
|
break;
|
|
}
|
|
if (*p != '\0') /* not end of headers */
|
|
goto next_line;
|
|
if (OSSL_TRACE_ENABLED(HTTP))
|
|
OSSL_TRACE(HTTP, "]\n");
|
|
|
|
if (rctx->keep_alive != 0 /* do not let server initiate keep_alive */
|
|
&& !found_keep_alive /* otherwise there is no change */) {
|
|
if (rctx->keep_alive == 2) {
|
|
rctx->keep_alive = 0;
|
|
ERR_raise(ERR_LIB_HTTP, HTTP_R_SERVER_CANCELED_CONNECTION);
|
|
return 0;
|
|
}
|
|
rctx->keep_alive = 0;
|
|
}
|
|
|
|
if (rctx->state == OHS_HEADERS_ERROR) {
|
|
if (OSSL_TRACE_ENABLED(HTTP)) {
|
|
int printed_final_nl = 0;
|
|
|
|
OSSL_TRACE(HTTP, "Received error response body: [\n");
|
|
while ((n = BIO_read(rctx->rbio, rctx->buf, rctx->buf_size)) > 0
|
|
|| (OSSL_sleep(100), BIO_should_retry(rctx->rbio))) {
|
|
OSSL_TRACE_STRING(HTTP, got_text, 1, rctx->buf, n);
|
|
if (n > 0)
|
|
printed_final_nl = rctx->buf[n - 1] == '\n';
|
|
}
|
|
OSSL_TRACE1(HTTP, "%s]\n", printed_final_nl ? "" : "\n");
|
|
(void)printed_final_nl; /* avoid warning unless enable-trace */
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
if (rctx->expected_ct != NULL && !found_expected_ct) {
|
|
ERR_raise_data(ERR_LIB_HTTP, HTTP_R_MISSING_CONTENT_TYPE,
|
|
"expected=%s", rctx->expected_ct);
|
|
return 0;
|
|
}
|
|
if (rctx->state == OHS_REDIRECT) {
|
|
/* http status code indicated redirect but there was no Location */
|
|
ERR_raise(ERR_LIB_HTTP, HTTP_R_MISSING_REDIRECT_LOCATION);
|
|
return 0;
|
|
}
|
|
|
|
if (!rctx->expect_asn1) {
|
|
rctx->state = OHS_STREAM;
|
|
return 1;
|
|
}
|
|
|
|
rctx->state = OHS_ASN1_HEADER;
|
|
|
|
/* Fall thru */
|
|
case OHS_ASN1_HEADER:
|
|
/*
|
|
* Now reading ASN1 header: can read at least 2 bytes which is enough
|
|
* for ASN1 SEQUENCE header and either length field or at least the
|
|
* length of the length field.
|
|
*/
|
|
n = BIO_get_mem_data(rctx->mem, &p);
|
|
if (n < 2)
|
|
goto next_io;
|
|
|
|
/* Check it is an ASN1 SEQUENCE */
|
|
if (*p++ != (V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED)) {
|
|
ERR_raise(ERR_LIB_HTTP, HTTP_R_MISSING_ASN1_ENCODING);
|
|
return 0;
|
|
}
|
|
|
|
/* Check out length field */
|
|
if ((*p & 0x80) != 0) {
|
|
/*
|
|
* If MSB set on initial length octet we can now always read 6
|
|
* octets: make sure we have them.
|
|
*/
|
|
if (n < 6)
|
|
goto next_io;
|
|
n = *p & 0x7F;
|
|
/* Not NDEF or excessive length */
|
|
if (n == 0 || (n > 4)) {
|
|
ERR_raise(ERR_LIB_HTTP, HTTP_R_ERROR_PARSING_ASN1_LENGTH);
|
|
return 0;
|
|
}
|
|
p++;
|
|
resp_len = 0;
|
|
for (i = 0; i < n; i++) {
|
|
resp_len <<= 8;
|
|
resp_len |= *p++;
|
|
}
|
|
resp_len += n + 2;
|
|
} else {
|
|
resp_len = *p + 2;
|
|
}
|
|
if (!check_set_resp_len(rctx, resp_len))
|
|
return 0;
|
|
|
|
rctx->state = OHS_ASN1_CONTENT;
|
|
|
|
/* Fall thru */
|
|
case OHS_ASN1_CONTENT:
|
|
default:
|
|
n = BIO_get_mem_data(rctx->mem, NULL);
|
|
if (n < 0 || (size_t)n < rctx->resp_len)
|
|
goto next_io;
|
|
|
|
rctx->state = OHS_ASN1_DONE;
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
int OSSL_HTTP_REQ_CTX_nbio_d2i(OSSL_HTTP_REQ_CTX *rctx,
|
|
ASN1_VALUE **pval, const ASN1_ITEM *it)
|
|
{
|
|
const unsigned char *p;
|
|
int rv;
|
|
|
|
*pval = NULL;
|
|
if ((rv = OSSL_HTTP_REQ_CTX_nbio(rctx)) != 1)
|
|
return rv;
|
|
*pval = ASN1_item_d2i(NULL, &p, BIO_get_mem_data(rctx->mem, &p), it);
|
|
return *pval != NULL;
|
|
|
|
}
|
|
|
|
#ifndef OPENSSL_NO_SOCK
|
|
|
|
/* set up a new connection BIO, to HTTP server or to HTTP(S) proxy if given */
|
|
static BIO *http_new_bio(const char *server /* optionally includes ":port" */,
|
|
const char *server_port /* explicit server port */,
|
|
int use_ssl,
|
|
const char *proxy /* optionally includes ":port" */,
|
|
const char *proxy_port /* explicit proxy port */)
|
|
{
|
|
const char *host = server;
|
|
const char *port = server_port;
|
|
BIO *cbio;
|
|
|
|
if (!ossl_assert(server != NULL))
|
|
return NULL;
|
|
|
|
if (proxy != NULL) {
|
|
host = proxy;
|
|
port = proxy_port;
|
|
}
|
|
|
|
if (port == NULL && strchr(host, ':') == NULL)
|
|
port = use_ssl ? OSSL_HTTPS_PORT : OSSL_HTTP_PORT;
|
|
|
|
cbio = BIO_new_connect(host /* optionally includes ":port" */);
|
|
if (cbio == NULL)
|
|
goto end;
|
|
if (port != NULL)
|
|
(void)BIO_set_conn_port(cbio, port);
|
|
|
|
end:
|
|
return cbio;
|
|
}
|
|
#endif /* OPENSSL_NO_SOCK */
|
|
|
|
/* Exchange request and response via HTTP on (non-)blocking BIO */
|
|
BIO *OSSL_HTTP_REQ_CTX_exchange(OSSL_HTTP_REQ_CTX *rctx)
|
|
{
|
|
int rv;
|
|
|
|
if (rctx == NULL) {
|
|
ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER);
|
|
return NULL;
|
|
}
|
|
|
|
for (;;) {
|
|
rv = OSSL_HTTP_REQ_CTX_nbio(rctx);
|
|
if (rv != -1)
|
|
break;
|
|
/* BIO_should_retry was true */
|
|
/* will not actually wait if rctx->max_time == 0 */
|
|
if (BIO_wait(rctx->rbio, rctx->max_time, 100 /* milliseconds */) <= 0)
|
|
return NULL;
|
|
}
|
|
|
|
if (rv == 0) {
|
|
if (rctx->redirection_url == NULL) { /* an error occurred */
|
|
if (rctx->len_to_send > 0)
|
|
ERR_raise(ERR_LIB_HTTP, HTTP_R_ERROR_SENDING);
|
|
else
|
|
ERR_raise(ERR_LIB_HTTP, HTTP_R_ERROR_RECEIVING);
|
|
}
|
|
return NULL;
|
|
}
|
|
return rctx->state == OHS_STREAM ? rctx->rbio : rctx->mem;
|
|
}
|
|
|
|
int OSSL_HTTP_is_alive(const OSSL_HTTP_REQ_CTX *rctx)
|
|
{
|
|
return rctx != NULL && rctx->keep_alive != 0;
|
|
}
|
|
|
|
/* High-level HTTP API implementation */
|
|
|
|
/* Initiate an HTTP session using bio, else use given server, proxy, etc. */
|
|
OSSL_HTTP_REQ_CTX *OSSL_HTTP_open(const char *server, const char *port,
|
|
const char *proxy, const char *no_proxy,
|
|
int use_ssl, BIO *bio, BIO *rbio,
|
|
OSSL_HTTP_bio_cb_t bio_update_fn, void *arg,
|
|
int buf_size, int overall_timeout)
|
|
{
|
|
BIO *cbio; /* == bio if supplied, used as connection BIO if rbio is NULL */
|
|
OSSL_HTTP_REQ_CTX *rctx = NULL;
|
|
|
|
if (use_ssl && bio_update_fn == NULL) {
|
|
ERR_raise(ERR_LIB_HTTP, HTTP_R_TLS_NOT_ENABLED);
|
|
return NULL;
|
|
}
|
|
if (rbio != NULL && (bio == NULL || bio_update_fn != NULL)) {
|
|
ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_INVALID_ARGUMENT);
|
|
return NULL;
|
|
}
|
|
|
|
if (bio != NULL) {
|
|
cbio = bio;
|
|
if (proxy != NULL || no_proxy != NULL) {
|
|
ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_INVALID_ARGUMENT);
|
|
return NULL;
|
|
}
|
|
} else {
|
|
#ifndef OPENSSL_NO_SOCK
|
|
char *proxy_host = NULL, *proxy_port = NULL;
|
|
|
|
if (server == NULL) {
|
|
ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER);
|
|
return NULL;
|
|
}
|
|
if (port != NULL && *port == '\0')
|
|
port = NULL;
|
|
if (port == NULL && strchr(server, ':') == NULL)
|
|
port = use_ssl ? OSSL_HTTPS_PORT : OSSL_HTTP_PORT;
|
|
proxy = OSSL_HTTP_adapt_proxy(proxy, no_proxy, server, use_ssl);
|
|
if (proxy != NULL
|
|
&& !OSSL_HTTP_parse_url(proxy, NULL /* use_ssl */, NULL /* user */,
|
|
&proxy_host, &proxy_port, NULL /* num */,
|
|
NULL /* path */, NULL, NULL))
|
|
return NULL;
|
|
cbio = http_new_bio(server, port, use_ssl, proxy_host, proxy_port);
|
|
OPENSSL_free(proxy_host);
|
|
OPENSSL_free(proxy_port);
|
|
if (cbio == NULL)
|
|
return NULL;
|
|
#else
|
|
ERR_raise(ERR_LIB_HTTP, HTTP_R_SOCK_NOT_SUPPORTED);
|
|
return NULL;
|
|
#endif
|
|
}
|
|
|
|
(void)ERR_set_mark(); /* prepare removing any spurious libssl errors */
|
|
if (rbio == NULL && BIO_do_connect_retry(cbio, overall_timeout, -1) <= 0) {
|
|
if (bio == NULL) /* cbio was not provided by caller */
|
|
BIO_free_all(cbio);
|
|
goto end;
|
|
}
|
|
/* now overall_timeout is guaranteed to be >= 0 */
|
|
|
|
/* adapt in order to fix callback design flaw, see #17088 */
|
|
/* callback can be used to wrap or prepend TLS session */
|
|
if (bio_update_fn != NULL) {
|
|
BIO *orig_bio = cbio;
|
|
|
|
cbio = (*bio_update_fn)(cbio, arg, 1 /* connect */, use_ssl != 0);
|
|
if (cbio == NULL) {
|
|
if (bio == NULL) /* cbio was not provided by caller */
|
|
BIO_free_all(orig_bio);
|
|
goto end;
|
|
}
|
|
}
|
|
|
|
rctx = http_req_ctx_new(bio == NULL, cbio, rbio != NULL ? rbio : cbio,
|
|
bio_update_fn, arg, use_ssl, proxy, server, port,
|
|
buf_size, overall_timeout);
|
|
|
|
end:
|
|
if (rctx != NULL)
|
|
/* remove any spurious error queue entries by ssl_add_cert_chain() */
|
|
(void)ERR_pop_to_mark();
|
|
else
|
|
(void)ERR_clear_last_mark();
|
|
|
|
return rctx;
|
|
}
|
|
|
|
int OSSL_HTTP_set1_request(OSSL_HTTP_REQ_CTX *rctx, const char *path,
|
|
const STACK_OF(CONF_VALUE) *headers,
|
|
const char *content_type, BIO *req,
|
|
const char *expected_content_type, int expect_asn1,
|
|
size_t max_resp_len, int timeout, int keep_alive)
|
|
{
|
|
int use_http_proxy;
|
|
|
|
if (rctx == NULL) {
|
|
ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER);
|
|
return 0;
|
|
}
|
|
use_http_proxy = rctx->proxy != NULL && !rctx->use_ssl;
|
|
if (use_http_proxy && rctx->server == NULL) {
|
|
ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_INVALID_ARGUMENT);
|
|
return 0;
|
|
}
|
|
rctx->max_resp_len = max_resp_len; /* allows for 0: indefinite */
|
|
|
|
return OSSL_HTTP_REQ_CTX_set_request_line(rctx, req != NULL,
|
|
use_http_proxy ? rctx->server
|
|
: NULL, rctx->port, path)
|
|
&& add1_headers(rctx, headers, rctx->server)
|
|
&& OSSL_HTTP_REQ_CTX_set_expected(rctx, expected_content_type,
|
|
expect_asn1, timeout, keep_alive)
|
|
&& set1_content(rctx, content_type, req);
|
|
}
|
|
|
|
/*-
|
|
* Exchange single HTTP request and response according to rctx.
|
|
* If rctx->method_POST then use POST, else use GET and ignore content_type.
|
|
* The redirection_url output (freed by caller) parameter is used only for GET.
|
|
*/
|
|
BIO *OSSL_HTTP_exchange(OSSL_HTTP_REQ_CTX *rctx, char **redirection_url)
|
|
{
|
|
BIO *resp;
|
|
|
|
if (rctx == NULL) {
|
|
ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER);
|
|
return NULL;
|
|
}
|
|
|
|
if (redirection_url != NULL)
|
|
*redirection_url = NULL; /* do this beforehand to prevent dbl free */
|
|
|
|
resp = OSSL_HTTP_REQ_CTX_exchange(rctx);
|
|
if (resp == NULL) {
|
|
if (rctx->redirection_url != NULL) {
|
|
if (redirection_url == NULL)
|
|
ERR_raise(ERR_LIB_HTTP, HTTP_R_REDIRECTION_NOT_ENABLED);
|
|
else
|
|
/* may be NULL if out of memory: */
|
|
*redirection_url = OPENSSL_strdup(rctx->redirection_url);
|
|
} else {
|
|
char buf[200];
|
|
unsigned long err = ERR_peek_error();
|
|
int lib = ERR_GET_LIB(err);
|
|
int reason = ERR_GET_REASON(err);
|
|
|
|
if (lib == ERR_LIB_SSL || lib == ERR_LIB_HTTP
|
|
|| (lib == ERR_LIB_BIO && reason == BIO_R_CONNECT_TIMEOUT)
|
|
|| (lib == ERR_LIB_BIO && reason == BIO_R_CONNECT_ERROR)
|
|
#ifndef OPENSSL_NO_CMP
|
|
|| (lib == ERR_LIB_CMP
|
|
&& reason == CMP_R_POTENTIALLY_INVALID_CERTIFICATE)
|
|
#endif
|
|
) {
|
|
if (rctx->server != NULL) {
|
|
BIO_snprintf(buf, sizeof(buf), "server=http%s://%s%s%s",
|
|
rctx->use_ssl ? "s" : "", rctx->server,
|
|
rctx->port != NULL ? ":" : "",
|
|
rctx->port != NULL ? rctx->port : "");
|
|
ERR_add_error_data(1, buf);
|
|
}
|
|
if (rctx->proxy != NULL)
|
|
ERR_add_error_data(2, " proxy=", rctx->proxy);
|
|
if (err == 0) {
|
|
BIO_snprintf(buf, sizeof(buf), " peer has disconnected%s",
|
|
rctx->use_ssl ? " violating the protocol" :
|
|
", likely because it requires the use of TLS");
|
|
ERR_add_error_data(1, buf);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (resp != NULL && !BIO_up_ref(resp))
|
|
resp = NULL;
|
|
return resp;
|
|
}
|
|
|
|
static int redirection_ok(int n_redir, const char *old_url, const char *new_url)
|
|
{
|
|
if (n_redir >= HTTP_VERSION_MAX_REDIRECTIONS) {
|
|
ERR_raise(ERR_LIB_HTTP, HTTP_R_TOO_MANY_REDIRECTIONS);
|
|
return 0;
|
|
}
|
|
if (*new_url == '/') /* redirection to same server => same protocol */
|
|
return 1;
|
|
if (HAS_PREFIX(old_url, OSSL_HTTPS_NAME":") &&
|
|
!HAS_PREFIX(new_url, OSSL_HTTPS_NAME":")) {
|
|
ERR_raise(ERR_LIB_HTTP, HTTP_R_REDIRECTION_FROM_HTTPS_TO_HTTP);
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/* Get data via HTTP from server at given URL, potentially with redirection */
|
|
BIO *OSSL_HTTP_get(const char *url, const char *proxy, const char *no_proxy,
|
|
BIO *bio, BIO *rbio,
|
|
OSSL_HTTP_bio_cb_t bio_update_fn, void *arg,
|
|
int buf_size, const STACK_OF(CONF_VALUE) *headers,
|
|
const char *expected_ct, int expect_asn1,
|
|
size_t max_resp_len, int timeout)
|
|
{
|
|
char *current_url;
|
|
int n_redirs = 0;
|
|
char *host;
|
|
char *port;
|
|
char *path;
|
|
int use_ssl;
|
|
BIO *resp = NULL;
|
|
time_t max_time = timeout > 0 ? time(NULL) + timeout : 0;
|
|
|
|
if (url == NULL) {
|
|
ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER);
|
|
return NULL;
|
|
}
|
|
if ((current_url = OPENSSL_strdup(url)) == NULL)
|
|
return NULL;
|
|
|
|
for (;;) {
|
|
OSSL_HTTP_REQ_CTX *rctx;
|
|
char *redirection_url;
|
|
|
|
if (!OSSL_HTTP_parse_url(current_url, &use_ssl, NULL /* user */, &host,
|
|
&port, NULL /* port_num */, &path, NULL, NULL))
|
|
break;
|
|
|
|
rctx = OSSL_HTTP_open(host, port, proxy, no_proxy,
|
|
use_ssl, bio, rbio, bio_update_fn, arg,
|
|
buf_size, timeout);
|
|
new_rpath:
|
|
redirection_url = NULL;
|
|
if (rctx != NULL) {
|
|
if (!OSSL_HTTP_set1_request(rctx, path, headers,
|
|
NULL /* content_type */,
|
|
NULL /* req */,
|
|
expected_ct, expect_asn1, max_resp_len,
|
|
-1 /* use same max time (timeout) */,
|
|
0 /* no keep_alive */)) {
|
|
OSSL_HTTP_REQ_CTX_free(rctx);
|
|
rctx = NULL;
|
|
} else {
|
|
resp = OSSL_HTTP_exchange(rctx, &redirection_url);
|
|
}
|
|
}
|
|
OPENSSL_free(path);
|
|
if (resp == NULL && redirection_url != NULL) {
|
|
if (redirection_ok(++n_redirs, current_url, redirection_url)
|
|
&& may_still_retry(max_time, &timeout)) {
|
|
(void)BIO_reset(bio);
|
|
OPENSSL_free(current_url);
|
|
current_url = redirection_url;
|
|
if (*redirection_url == '/') { /* redirection to same server */
|
|
path = OPENSSL_strdup(redirection_url);
|
|
if (path == NULL) {
|
|
OPENSSL_free(host);
|
|
OPENSSL_free(port);
|
|
(void)OSSL_HTTP_close(rctx, 1);
|
|
BIO_free(resp);
|
|
OPENSSL_free(current_url);
|
|
return NULL;
|
|
}
|
|
goto new_rpath;
|
|
}
|
|
OPENSSL_free(host);
|
|
OPENSSL_free(port);
|
|
(void)OSSL_HTTP_close(rctx, 1);
|
|
continue;
|
|
}
|
|
/* if redirection not allowed, ignore it */
|
|
OPENSSL_free(redirection_url);
|
|
}
|
|
OPENSSL_free(host);
|
|
OPENSSL_free(port);
|
|
if (!OSSL_HTTP_close(rctx, resp != NULL)) {
|
|
BIO_free(resp);
|
|
resp = NULL;
|
|
}
|
|
break;
|
|
}
|
|
OPENSSL_free(current_url);
|
|
return resp;
|
|
}
|
|
|
|
/* Exchange request and response over a connection managed via |prctx| */
|
|
BIO *OSSL_HTTP_transfer(OSSL_HTTP_REQ_CTX **prctx,
|
|
const char *server, const char *port,
|
|
const char *path, int use_ssl,
|
|
const char *proxy, const char *no_proxy,
|
|
BIO *bio, BIO *rbio,
|
|
OSSL_HTTP_bio_cb_t bio_update_fn, void *arg,
|
|
int buf_size, const STACK_OF(CONF_VALUE) *headers,
|
|
const char *content_type, BIO *req,
|
|
const char *expected_ct, int expect_asn1,
|
|
size_t max_resp_len, int timeout, int keep_alive)
|
|
{
|
|
OSSL_HTTP_REQ_CTX *rctx = prctx == NULL ? NULL : *prctx;
|
|
BIO *resp = NULL;
|
|
|
|
if (rctx == NULL) {
|
|
rctx = OSSL_HTTP_open(server, port, proxy, no_proxy,
|
|
use_ssl, bio, rbio, bio_update_fn, arg,
|
|
buf_size, timeout);
|
|
timeout = -1; /* Already set during opening the connection */
|
|
}
|
|
if (rctx != NULL) {
|
|
if (OSSL_HTTP_set1_request(rctx, path, headers, content_type, req,
|
|
expected_ct, expect_asn1,
|
|
max_resp_len, timeout, keep_alive))
|
|
resp = OSSL_HTTP_exchange(rctx, NULL);
|
|
if (resp == NULL || !OSSL_HTTP_is_alive(rctx)) {
|
|
if (!OSSL_HTTP_close(rctx, resp != NULL)) {
|
|
BIO_free(resp);
|
|
resp = NULL;
|
|
}
|
|
rctx = NULL;
|
|
}
|
|
}
|
|
if (prctx != NULL)
|
|
*prctx = rctx;
|
|
return resp;
|
|
}
|
|
|
|
int OSSL_HTTP_close(OSSL_HTTP_REQ_CTX *rctx, int ok)
|
|
{
|
|
BIO *wbio;
|
|
int ret = 1;
|
|
|
|
/* callback can be used to finish TLS session and free its BIO */
|
|
if (rctx != NULL && rctx->upd_fn != NULL) {
|
|
wbio = (*rctx->upd_fn)(rctx->wbio, rctx->upd_arg,
|
|
0 /* disconnect */, ok);
|
|
ret = wbio != NULL;
|
|
if (ret)
|
|
rctx->wbio = wbio;
|
|
}
|
|
OSSL_HTTP_REQ_CTX_free(rctx);
|
|
return ret;
|
|
}
|
|
|
|
/* BASE64 encoder used for encoding basic proxy authentication credentials */
|
|
static char *base64encode(const void *buf, size_t len)
|
|
{
|
|
int i;
|
|
size_t outl;
|
|
char *out;
|
|
|
|
/* Calculate size of encoded data */
|
|
outl = (len / 3);
|
|
if (len % 3 > 0)
|
|
outl++;
|
|
outl <<= 2;
|
|
out = OPENSSL_malloc(outl + 1);
|
|
if (out == NULL)
|
|
return 0;
|
|
|
|
i = EVP_EncodeBlock((unsigned char *)out, buf, len);
|
|
if (!ossl_assert(0 <= i && (size_t)i <= outl)) {
|
|
OPENSSL_free(out);
|
|
return NULL;
|
|
}
|
|
return out;
|
|
}
|
|
|
|
/*
|
|
* Promote the given connection BIO using the CONNECT method for a TLS proxy.
|
|
* This is typically called by an app, so bio_err and prog are used unless NULL
|
|
* to print additional diagnostic information in a user-oriented way.
|
|
*/
|
|
int OSSL_HTTP_proxy_connect(BIO *bio, const char *server, const char *port,
|
|
const char *proxyuser, const char *proxypass,
|
|
int timeout, BIO *bio_err, const char *prog)
|
|
{
|
|
#undef BUF_SIZE
|
|
#define BUF_SIZE (8 * 1024)
|
|
char *mbuf = OPENSSL_malloc(BUF_SIZE);
|
|
char *mbufp;
|
|
int read_len = 0;
|
|
int ret = 0;
|
|
BIO *fbio = BIO_new(BIO_f_buffer());
|
|
int rv;
|
|
time_t max_time = timeout > 0 ? time(NULL) + timeout : 0;
|
|
|
|
if (bio == NULL || server == NULL
|
|
|| (bio_err != NULL && prog == NULL)) {
|
|
ERR_raise(ERR_LIB_HTTP, ERR_R_PASSED_NULL_PARAMETER);
|
|
goto end;
|
|
}
|
|
if (port == NULL || *port == '\0')
|
|
port = OSSL_HTTPS_PORT;
|
|
|
|
if (mbuf == NULL || fbio == NULL) {
|
|
BIO_printf(bio_err /* may be NULL */, "%s: out of memory", prog);
|
|
goto end;
|
|
}
|
|
BIO_push(fbio, bio);
|
|
|
|
BIO_printf(fbio, "CONNECT %s:%s "HTTP_1_0"\r\n", server, port);
|
|
|
|
/*
|
|
* Workaround for broken proxies which would otherwise close
|
|
* the connection when entering tunnel mode (e.g., Squid 2.6)
|
|
*/
|
|
BIO_printf(fbio, "Proxy-Connection: Keep-Alive\r\n");
|
|
|
|
/* Support for basic (base64) proxy authentication */
|
|
if (proxyuser != NULL) {
|
|
size_t len = strlen(proxyuser) + 1;
|
|
char *proxyauth, *proxyauthenc = NULL;
|
|
|
|
if (proxypass != NULL)
|
|
len += strlen(proxypass);
|
|
proxyauth = OPENSSL_malloc(len + 1);
|
|
if (proxyauth == NULL)
|
|
goto end;
|
|
if (BIO_snprintf(proxyauth, len + 1, "%s:%s", proxyuser,
|
|
proxypass != NULL ? proxypass : "") != (int)len)
|
|
goto proxy_end;
|
|
proxyauthenc = base64encode(proxyauth, len);
|
|
if (proxyauthenc != NULL) {
|
|
BIO_printf(fbio, "Proxy-Authorization: Basic %s\r\n", proxyauthenc);
|
|
OPENSSL_clear_free(proxyauthenc, strlen(proxyauthenc));
|
|
}
|
|
proxy_end:
|
|
OPENSSL_clear_free(proxyauth, len);
|
|
if (proxyauthenc == NULL)
|
|
goto end;
|
|
}
|
|
|
|
/* Terminate the HTTP CONNECT request */
|
|
BIO_printf(fbio, "\r\n");
|
|
|
|
for (;;) {
|
|
if (BIO_flush(fbio) != 0)
|
|
break;
|
|
/* potentially needs to be retried if BIO is non-blocking */
|
|
if (!BIO_should_retry(fbio))
|
|
break;
|
|
}
|
|
|
|
for (;;) {
|
|
/* will not actually wait if timeout == 0 */
|
|
rv = BIO_wait(fbio, max_time, 100 /* milliseconds */);
|
|
if (rv <= 0) {
|
|
BIO_printf(bio_err, "%s: HTTP CONNECT %s\n", prog,
|
|
rv == 0 ? "timed out" : "failed waiting for data");
|
|
goto end;
|
|
}
|
|
|
|
/*-
|
|
* The first line is the HTTP response.
|
|
* According to RFC 7230, it is formatted exactly like this:
|
|
* HTTP/d.d ddd reason text\r\n
|
|
*/
|
|
read_len = BIO_gets(fbio, mbuf, BUF_SIZE);
|
|
/* the BIO may not block, so we must wait for the 1st line to come in */
|
|
if (read_len < (int)HTTP_LINE1_MINLEN)
|
|
continue;
|
|
|
|
/* Check for HTTP/1.x */
|
|
mbufp = mbuf;
|
|
if (!CHECK_AND_SKIP_PREFIX(mbufp, HTTP_PREFIX)) {
|
|
ERR_raise(ERR_LIB_HTTP, HTTP_R_HEADER_PARSE_ERROR);
|
|
BIO_printf(bio_err, "%s: HTTP CONNECT failed, non-HTTP response\n",
|
|
prog);
|
|
/* Wrong protocol, not even HTTP, so stop reading headers */
|
|
goto end;
|
|
}
|
|
if (!HAS_PREFIX(mbufp, HTTP_VERSION_PATT)) {
|
|
ERR_raise(ERR_LIB_HTTP, HTTP_R_RECEIVED_WRONG_HTTP_VERSION);
|
|
BIO_printf(bio_err,
|
|
"%s: HTTP CONNECT failed, bad HTTP version %.*s\n",
|
|
prog, (int)HTTP_VERSION_STR_LEN, mbufp);
|
|
goto end;
|
|
}
|
|
mbufp += HTTP_VERSION_STR_LEN;
|
|
|
|
/* RFC 7231 4.3.6: any 2xx status code is valid */
|
|
if (!HAS_PREFIX(mbufp, " 2")) {
|
|
if (ossl_isspace(*mbufp))
|
|
mbufp++;
|
|
/* chop any trailing whitespace */
|
|
while (read_len > 0 && ossl_isspace(mbuf[read_len - 1]))
|
|
read_len--;
|
|
mbuf[read_len] = '\0';
|
|
ERR_raise_data(ERR_LIB_HTTP, HTTP_R_CONNECT_FAILURE,
|
|
"reason=%s", mbufp);
|
|
BIO_printf(bio_err, "%s: HTTP CONNECT failed, reason=%s\n",
|
|
prog, mbufp);
|
|
goto end;
|
|
}
|
|
ret = 1;
|
|
break;
|
|
}
|
|
|
|
/* Read past all following headers */
|
|
do {
|
|
/*
|
|
* This does not necessarily catch the case when the full
|
|
* HTTP response came in more than a single TCP message.
|
|
*/
|
|
read_len = BIO_gets(fbio, mbuf, BUF_SIZE);
|
|
} while (read_len > 2);
|
|
|
|
end:
|
|
if (fbio != NULL) {
|
|
(void)BIO_flush(fbio);
|
|
BIO_pop(fbio);
|
|
BIO_free(fbio);
|
|
}
|
|
OPENSSL_free(mbuf);
|
|
return ret;
|
|
#undef BUF_SIZE
|
|
}
|