| 1 | /*
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| 2 | * Copyright 2007-2022 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | * Copyright Nokia 2007-2019
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| 4 | * Copyright Siemens AG 2015-2019
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| 5 | *
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| 6 | * Licensed under the Apache License 2.0 (the "License"). You may not use
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| 7 | * this file except in compliance with the License. You can obtain a copy
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| 8 | * in the file LICENSE in the source distribution or at
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| 9 | * https://www.openssl.org/source/license.html
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| 10 | */
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| 11 |
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| 12 | #include <string.h>
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| 13 | #include <stdio.h>
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| 14 |
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| 15 | #include <openssl/asn1t.h>
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| 16 | #include <openssl/http.h>
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| 17 | #include "internal/sockets.h"
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| 18 |
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| 19 | #include <openssl/cmp.h>
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| 20 | #include "cmp_local.h"
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| 21 |
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| 22 | /* explicit #includes not strictly needed since implied by the above: */
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| 23 | #include <ctype.h>
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| 24 | #include <fcntl.h>
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| 25 | #include <stdlib.h>
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| 26 | #include <openssl/bio.h>
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| 27 | #include <openssl/buffer.h>
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| 28 | #include <openssl/cmp.h>
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| 29 | #include <openssl/err.h>
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| 30 |
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| 31 | static int keep_alive(int keep_alive, int body_type)
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| 32 | {
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| 33 | if (keep_alive != 0
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| 34 | /*
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| 35 | * Ask for persistent connection only if may need more round trips.
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| 36 | * Do so even with disableConfirm because polling might be needed.
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| 37 | */
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| 38 | && body_type != OSSL_CMP_PKIBODY_IR
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| 39 | && body_type != OSSL_CMP_PKIBODY_CR
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| 40 | && body_type != OSSL_CMP_PKIBODY_P10CR
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| 41 | && body_type != OSSL_CMP_PKIBODY_KUR
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| 42 | && body_type != OSSL_CMP_PKIBODY_POLLREQ)
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| 43 | keep_alive = 0;
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| 44 | return keep_alive;
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| 45 | }
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| 46 |
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| 47 | /*
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| 48 | * Send the PKIMessage req and on success return the response, else NULL.
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| 49 | * Any previous error queue entries will likely be removed by ERR_clear_error().
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| 50 | */
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| 51 | OSSL_CMP_MSG *OSSL_CMP_MSG_http_perform(OSSL_CMP_CTX *ctx,
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| 52 | const OSSL_CMP_MSG *req)
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| 53 | {
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| 54 | char server_port[32] = { '\0' };
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| 55 | STACK_OF(CONF_VALUE) *headers = NULL;
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| 56 | const char content_type_pkix[] = "application/pkixcmp";
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| 57 | int tls_used;
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| 58 | const ASN1_ITEM *it = ASN1_ITEM_rptr(OSSL_CMP_MSG);
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| 59 | BIO *req_mem, *rsp;
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| 60 | OSSL_CMP_MSG *res = NULL;
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| 61 |
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| 62 | if (ctx == NULL || req == NULL) {
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| 63 | ERR_raise(ERR_LIB_CMP, CMP_R_NULL_ARGUMENT);
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| 64 | return NULL;
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| 65 | }
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| 66 |
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| 67 | if (!X509V3_add_value("Pragma", "no-cache", &headers))
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| 68 | return NULL;
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| 69 | if ((req_mem = ASN1_item_i2d_mem_bio(it, (const ASN1_VALUE *)req)) == NULL)
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| 70 | goto err;
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| 71 |
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| 72 | if (ctx->serverPort != 0)
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| 73 | BIO_snprintf(server_port, sizeof(server_port), "%d", ctx->serverPort);
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| 74 | tls_used = OSSL_CMP_CTX_get_http_cb_arg(ctx) != NULL;
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| 75 | if (ctx->http_ctx == NULL)
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| 76 | ossl_cmp_log3(DEBUG, ctx, "connecting to CMP server %s:%s%s",
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| 77 | ctx->server, server_port, tls_used ? " using TLS" : "");
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| 78 |
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| 79 | rsp = OSSL_HTTP_transfer(&ctx->http_ctx, ctx->server, server_port,
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| 80 | ctx->serverPath, tls_used,
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| 81 | ctx->proxy, ctx->no_proxy,
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| 82 | NULL /* bio */, NULL /* rbio */,
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| 83 | ctx->http_cb, OSSL_CMP_CTX_get_http_cb_arg(ctx),
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| 84 | 0 /* buf_size */, headers,
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| 85 | content_type_pkix, req_mem,
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| 86 | content_type_pkix, 1 /* expect_asn1 */,
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| 87 | OSSL_HTTP_DEFAULT_MAX_RESP_LEN,
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| 88 | ctx->msg_timeout,
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| 89 | keep_alive(ctx->keep_alive, req->body->type));
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| 90 | BIO_free(req_mem);
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| 91 | res = (OSSL_CMP_MSG *)ASN1_item_d2i_bio(it, rsp, NULL);
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| 92 | BIO_free(rsp);
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| 93 |
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| 94 | if (ctx->http_ctx == NULL)
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| 95 | ossl_cmp_debug(ctx, "disconnected from CMP server");
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| 96 | /*
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| 97 | * Note that on normal successful end of the transaction the connection
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| 98 | * is not closed at this level, but this will be done by the CMP client
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| 99 | * application via OSSL_CMP_CTX_free() or OSSL_CMP_CTX_reinit().
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| 100 | */
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| 101 | if (res != NULL)
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| 102 | ossl_cmp_debug(ctx, "finished reading response from CMP server");
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| 103 | err:
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| 104 | sk_CONF_VALUE_pop_free(headers, X509V3_conf_free);
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| 105 | return res;
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| 106 | }
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