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1 | /* | |
2 | * Copyright 2007-2021 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 | #include "internal/sockets.h" | |
18 | ||
19 | #include "openssl/cmp.h" | |
20 | #include "cmp_local.h" | |
21 | ||
22 | /* explicit #includes not strictly needed since implied by the above: */ | |
23 | #include <ctype.h> | |
24 | #include <fcntl.h> | |
25 | #include <stdlib.h> | |
26 | #include <openssl/bio.h> | |
27 | #include <openssl/buffer.h> | |
28 | #include <openssl/cmp.h> | |
29 | #include <openssl/err.h> | |
30 | ||
31 | static int keep_alive(int keep_alive, int body_type) | |
32 | { | |
33 | if (keep_alive != 0 | |
34 | /* Ask for persistent connection only if may need more round trips */ | |
35 | && body_type != OSSL_CMP_PKIBODY_IR | |
36 | && body_type != OSSL_CMP_PKIBODY_CR | |
37 | && body_type != OSSL_CMP_PKIBODY_P10CR | |
38 | && body_type != OSSL_CMP_PKIBODY_KUR | |
39 | && body_type != OSSL_CMP_PKIBODY_POLLREQ) | |
40 | keep_alive = 0; | |
41 | return keep_alive; | |
42 | } | |
43 | ||
44 | /* | |
45 | * Send the PKIMessage req and on success return the response, else NULL. | |
46 | * Any previous error queue entries will likely be removed by ERR_clear_error(). | |
47 | */ | |
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 | OSSL_CMP_MSG *res = NULL; | |
58 | ||
59 | if (ctx == NULL || req == NULL) { | |
60 | ERR_raise(ERR_LIB_CMP, CMP_R_NULL_ARGUMENT); | |
61 | return NULL; | |
62 | } | |
63 | ||
64 | if (!X509V3_add_value("Pragma", "no-cache", &headers)) | |
65 | return NULL; | |
66 | if ((req_mem = ASN1_item_i2d_mem_bio(it, (const ASN1_VALUE *)req)) == NULL) | |
67 | goto err; | |
68 | ||
69 | if (ctx->serverPort != 0) | |
70 | BIO_snprintf(server_port, sizeof(server_port), "%d", ctx->serverPort); | |
71 | tls_used = OSSL_CMP_CTX_get_http_cb_arg(ctx) != NULL; | |
72 | if (ctx->http_ctx == NULL) | |
73 | ossl_cmp_log3(DEBUG, ctx, "connecting to CMP server %s:%s%s", | |
74 | ctx->server, server_port, tls_used ? " using TLS" : ""); | |
75 | ||
76 | rsp = OSSL_HTTP_transfer(&ctx->http_ctx, ctx->server, server_port, | |
77 | ctx->serverPath, tls_used, | |
78 | ctx->proxy, ctx->no_proxy, | |
79 | NULL /* bio */, NULL /* rbio */, | |
80 | ctx->http_cb, OSSL_CMP_CTX_get_http_cb_arg(ctx), | |
81 | 0 /* buf_size */, headers, | |
82 | content_type_pkix, req_mem, | |
83 | content_type_pkix, 1 /* expect_asn1 */, | |
84 | OSSL_HTTP_DEFAULT_MAX_RESP_LEN, | |
85 | ctx->msg_timeout, | |
86 | keep_alive(ctx->keep_alive, req->body->type)); | |
87 | BIO_free(req_mem); | |
88 | res = (OSSL_CMP_MSG *)ASN1_item_d2i_bio(it, rsp, NULL); | |
89 | BIO_free(rsp); | |
90 | ||
91 | if (ctx->http_ctx == NULL) | |
92 | ossl_cmp_debug(ctx, "disconnected from CMP server"); | |
93 | /* | |
94 | * Note that on normal successful end of the transaction the connection | |
95 | * is not closed at this level, but this will be done by the CMP client | |
96 | * application via OSSL_CMP_CTX_free() or OSSL_CMP_CTX_reinit(). | |
97 | */ | |
98 | if (res != NULL) | |
99 | ossl_cmp_debug(ctx, "finished reading response from CMP server"); | |
100 | err: | |
101 | sk_CONF_VALUE_pop_free(headers, X509V3_conf_free); | |
102 | return res; | |
103 | } |