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 "cmp_local.h"
13
keep_alive(int keep_alive,int body_type,BIO ** bios)14 static int keep_alive(int keep_alive, int body_type, BIO **bios)
15 {
16 if (keep_alive != 0 && bios == NULL
17 /*
18 * Ask for persistent connection only if may need more round trips.
19 * Do so even with disableConfirm because polling might be needed.
20 */
21 && body_type != OSSL_CMP_PKIBODY_IR
22 && body_type != OSSL_CMP_PKIBODY_CR
23 && body_type != OSSL_CMP_PKIBODY_P10CR
24 && body_type != OSSL_CMP_PKIBODY_KUR
25 && body_type != OSSL_CMP_PKIBODY_POLLREQ)
26 keep_alive = 0;
27 return keep_alive;
28 }
29
30 /*
31 * Send the PKIMessage req and on success return the response, else NULL.
32 */
OSSL_CMP_MSG_http_perform(OSSL_CMP_CTX * ctx,const OSSL_CMP_MSG * req)33 OSSL_CMP_MSG *OSSL_CMP_MSG_http_perform(OSSL_CMP_CTX *ctx,
34 const OSSL_CMP_MSG *req)
35 {
36 char server_port[32] = { '\0' };
37 STACK_OF(CONF_VALUE) *headers = NULL;
38 const char content_type_pkix[] = "application/pkixcmp";
39 int tls_used;
40 const ASN1_ITEM *it = ASN1_ITEM_rptr(OSSL_CMP_MSG);
41 BIO *req_mem, *rsp;
42 BIO **bios; /* optionally used as bio and rbio */
43 OSSL_CMP_MSG *res = NULL;
44
45 if (ctx == NULL || req == NULL) {
46 ERR_raise(ERR_LIB_CMP, CMP_R_NULL_ARGUMENT);
47 return NULL;
48 }
49
50 if (!X509V3_add_value("Pragma", "no-cache", &headers))
51 return NULL;
52 if ((req_mem = ASN1_item_i2d_mem_bio(it, (const ASN1_VALUE *)req)) == NULL)
53 goto err;
54
55 bios = OSSL_CMP_CTX_get_transfer_cb_arg(ctx);
56 if (ctx->serverPort != 0)
57 BIO_snprintf(server_port, sizeof(server_port), "%d", ctx->serverPort);
58 tls_used = ctx->tls_used >= 0 ? ctx->tls_used != 0
59 : OSSL_CMP_CTX_get_http_cb_arg(ctx) != NULL; /* backward compat */
60 if (ctx->http_ctx == NULL) { /* using existing connection or yet not set up own connection */
61 const char *path = ctx->serverPath;
62
63 if (path == NULL)
64 path = "";
65 if (*path == '/')
66 path++;
67 if (bios == NULL)
68 ossl_cmp_log4(DEBUG, ctx,
69 "connecting to CMP server via http%s://%s:%s/%s",
70 tls_used ? "s" : "", ctx->server, server_port, path);
71 else
72 ossl_cmp_log3(DEBUG, ctx,
73 "using existing connection with CMP server %s:%s and HTTP path /%s",
74 ctx->server, server_port, path);
75 }
76
77 rsp = OSSL_HTTP_transfer(&ctx->http_ctx, ctx->server, server_port,
78 ctx->serverPath, tls_used,
79 ctx->proxy, ctx->no_proxy,
80 bios == NULL ? NULL : bios[0] /* bio */,
81 bios == NULL ? NULL : bios[1] /* rbio */,
82 ctx->http_cb, OSSL_CMP_CTX_get_http_cb_arg(ctx),
83 0 /* buf_size */, headers,
84 content_type_pkix, req_mem,
85 content_type_pkix, 1 /* expect_asn1 */,
86 OSSL_HTTP_DEFAULT_MAX_RESP_LEN,
87 ctx->msg_timeout,
88 keep_alive(ctx->keep_alive, req->body->type, bios));
89 BIO_free(req_mem);
90 res = (OSSL_CMP_MSG *)ASN1_item_d2i_bio(it, rsp, NULL);
91 BIO_free(rsp);
92
93 if (ctx->http_ctx == NULL)
94 ossl_cmp_debug(ctx, "disconnected from CMP server");
95 /*
96 * Note that on normal successful end of the transaction the
97 * HTTP connection is not closed at this level if keep_alive(...) != 0.
98 * It should be closed by the CMP client application
99 * using OSSL_CMP_CTX_free() or OSSL_CMP_CTX_reinit().
100 * Any pre-existing bio (== ctx->transfer_cb_arg) is not freed.
101 */
102 if (res != NULL)
103 ossl_cmp_debug(ctx, "finished reading response from CMP server");
104 err:
105 sk_CONF_VALUE_pop_free(headers, X509V3_conf_free);
106 return res;
107 }
108