1 /*
2 * Copyright 2007-2025 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright Nokia 2007-2019
4 * Copyright Siemens AG 2015-2019
5 *
6 * Licensed under the Apache License 2.0 (the "License"). You may not use
7 * this file except in compliance with the License. You can obtain a copy
8 * in the file LICENSE in the source distribution or at
9 * https://www.openssl.org/source/license.html
10 */
11
12 #include <string.h>
13 #include <stdio.h>
14
15 #include <openssl/asn1t.h>
16 #include <openssl/http.h>
17
18 #include <openssl/cmp.h>
19 #include "cmp_local.h"
20
21 /* explicit #includes not strictly needed since implied by the above: */
22 #include <ctype.h>
23 #include <fcntl.h>
24 #include <stdlib.h>
25 #include <openssl/bio.h>
26 #include <openssl/buffer.h>
27 #include <openssl/err.h>
28
keep_alive(int keep_alive,int body_type,BIO ** bios)29 static int keep_alive(int keep_alive, int body_type, BIO **bios)
30 {
31 if (keep_alive != 0 && bios == NULL
32 /*
33 * Ask for persistent connection only if may need more round trips.
34 * Do so even with disableConfirm because polling might be needed.
35 */
36 && body_type != OSSL_CMP_PKIBODY_IR
37 && body_type != OSSL_CMP_PKIBODY_CR
38 && body_type != OSSL_CMP_PKIBODY_P10CR
39 && body_type != OSSL_CMP_PKIBODY_KUR
40 && body_type != OSSL_CMP_PKIBODY_POLLREQ)
41 keep_alive = 0;
42 return keep_alive;
43 }
44
45 /*
46 * Send the PKIMessage req and on success return the response, else NULL.
47 */
OSSL_CMP_MSG_http_perform(OSSL_CMP_CTX * ctx,const OSSL_CMP_MSG * req)48 OSSL_CMP_MSG *OSSL_CMP_MSG_http_perform(OSSL_CMP_CTX *ctx,
49 const OSSL_CMP_MSG *req)
50 {
51 char server_port[32] = { '\0' };
52 STACK_OF(CONF_VALUE) *headers = NULL;
53 const char content_type_pkix[] = "application/pkixcmp";
54 int tls_used;
55 const ASN1_ITEM *it = ASN1_ITEM_rptr(OSSL_CMP_MSG);
56 BIO *req_mem, *rsp;
57 BIO **bios; /* optionally used as bio and rbio */
58 OSSL_CMP_MSG *res = NULL;
59
60 if (ctx == NULL || req == NULL) {
61 ERR_raise(ERR_LIB_CMP, CMP_R_NULL_ARGUMENT);
62 return NULL;
63 }
64
65 if (!X509V3_add_value("Pragma", "no-cache", &headers))
66 return NULL;
67 if ((req_mem = ASN1_item_i2d_mem_bio(it, (const ASN1_VALUE *)req)) == NULL)
68 goto err;
69
70 bios = OSSL_CMP_CTX_get_transfer_cb_arg(ctx);
71 if (ctx->serverPort != 0)
72 BIO_snprintf(server_port, sizeof(server_port), "%d", ctx->serverPort);
73 tls_used = ctx->tls_used >= 0 ? ctx->tls_used != 0
74 : OSSL_CMP_CTX_get_http_cb_arg(ctx) != NULL; /* backward compat */
75 if (ctx->http_ctx == NULL) { /* using existing connection or yet not set up own connection */
76 const char *path = ctx->serverPath;
77
78 if (path == NULL)
79 path = "";
80 if (*path == '/')
81 path++;
82 if (bios == NULL)
83 ossl_cmp_log4(DEBUG, ctx,
84 "connecting to CMP server via http%s://%s:%s/%s",
85 tls_used ? "s" : "", ctx->server, server_port, path);
86 else
87 ossl_cmp_log3(DEBUG, ctx,
88 "using existing connection with CMP server %s:%s and HTTP path /%s",
89 ctx->server, server_port, path);
90 }
91
92 rsp = OSSL_HTTP_transfer(&ctx->http_ctx, ctx->server, server_port,
93 ctx->serverPath, tls_used,
94 ctx->proxy, ctx->no_proxy,
95 bios == NULL ? NULL : bios[0] /* bio */,
96 bios == NULL ? NULL : bios[1] /* rbio */,
97 ctx->http_cb, OSSL_CMP_CTX_get_http_cb_arg(ctx),
98 0 /* buf_size */, headers,
99 content_type_pkix, req_mem,
100 content_type_pkix, 1 /* expect_asn1 */,
101 OSSL_HTTP_DEFAULT_MAX_RESP_LEN,
102 ctx->msg_timeout,
103 keep_alive(ctx->keep_alive, req->body->type, bios));
104 BIO_free(req_mem);
105 res = (OSSL_CMP_MSG *)ASN1_item_d2i_bio(it, rsp, NULL);
106 BIO_free(rsp);
107
108 if (ctx->http_ctx == NULL)
109 ossl_cmp_debug(ctx, "disconnected from CMP server");
110 /*
111 * Note that on normal successful end of the transaction the
112 * HTTP connection is not closed at this level if keep_alive(...) != 0.
113 * It should be closed by the CMP client application
114 * using OSSL_CMP_CTX_free() or OSSL_CMP_CTX_reinit().
115 * Any pre-existing bio (== ctx->transfer_cb_arg) is not freed.
116 */
117 if (res != NULL)
118 ossl_cmp_debug(ctx, "finished reading response from CMP server");
119 err:
120 sk_CONF_VALUE_pop_free(headers, X509V3_conf_free);
121 return res;
122 }
123