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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-03-09 13:19:22 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-03-09 13:19:22 +0000 |
commit | c21c3b0befeb46a51b6bf3758ffa30813bea0ff0 (patch) | |
tree | 9754ff1ca740f6346cf8483ec915d4054bc5da2d /fluent-bit/lib/librdkafka-2.1.0/src/rdkafka_cert.c | |
parent | Adding upstream version 1.43.2. (diff) | |
download | netdata-c21c3b0befeb46a51b6bf3758ffa30813bea0ff0.tar.xz netdata-c21c3b0befeb46a51b6bf3758ffa30813bea0ff0.zip |
Adding upstream version 1.44.3.upstream/1.44.3
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'fluent-bit/lib/librdkafka-2.1.0/src/rdkafka_cert.c')
-rw-r--r-- | fluent-bit/lib/librdkafka-2.1.0/src/rdkafka_cert.c | 552 |
1 files changed, 552 insertions, 0 deletions
diff --git a/fluent-bit/lib/librdkafka-2.1.0/src/rdkafka_cert.c b/fluent-bit/lib/librdkafka-2.1.0/src/rdkafka_cert.c new file mode 100644 index 000000000..2a19e4549 --- /dev/null +++ b/fluent-bit/lib/librdkafka-2.1.0/src/rdkafka_cert.c @@ -0,0 +1,552 @@ +/* + * librdkafka - The Apache Kafka C/C++ library + * + * Copyright (c) 2019 Magnus Edenhill + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + + +/** + * @name SSL certificates + * + */ + +#include "rdkafka_int.h" +#include "rdkafka_transport_int.h" + + +#if WITH_SSL +#include "rdkafka_ssl.h" + +#include <openssl/x509.h> +#include <openssl/evp.h> + +/** + * @brief OpenSSL password query callback using a conf struct. + * + * @locality application thread + */ +static int +rd_kafka_conf_ssl_passwd_cb(char *buf, int size, int rwflag, void *userdata) { + const rd_kafka_conf_t *conf = userdata; + int pwlen; + + if (!conf->ssl.key_password) + return -1; + + pwlen = (int)strlen(conf->ssl.key_password); + memcpy(buf, conf->ssl.key_password, RD_MIN(pwlen, size)); + + return pwlen; +} + + + +static const char *rd_kafka_cert_type_names[] = {"public-key", "private-key", + "CA"}; + +static const char *rd_kafka_cert_enc_names[] = {"PKCS#12", "DER", "PEM"}; + + +/** + * @brief Destroy a certificate + */ +static void rd_kafka_cert_destroy(rd_kafka_cert_t *cert) { + if (rd_refcnt_sub(&cert->refcnt) > 0) + return; + + if (cert->x509) + X509_free(cert->x509); + if (cert->pkey) + EVP_PKEY_free(cert->pkey); + if (cert->store) + X509_STORE_free(cert->store); + + rd_free(cert); +} + + +/** + * @brief Create a copy of a cert + */ +static rd_kafka_cert_t *rd_kafka_cert_dup(rd_kafka_cert_t *src) { + rd_refcnt_add(&src->refcnt); + return src; +} + + +#if OPENSSL_VERSION_NUMBER < 0x30000000 +/** + * @brief Print the OpenSSL error stack to stdout, for development use. + */ +static RD_UNUSED void rd_kafka_print_ssl_errors(void) { + unsigned long l; + const char *file, *data; + int line, flags; + + while ((l = ERR_get_error_line_data(&file, &line, &data, &flags)) != + 0) { + char buf[256]; + + ERR_error_string_n(l, buf, sizeof(buf)); + + printf("ERR: %s:%d: %s: %s:\n", file, line, buf, + (flags & ERR_TXT_STRING) ? data : ""); + printf(" %lu:%s : %s : %s : %d : %s (%p, %d, fl 0x%x)\n", l, + ERR_lib_error_string(l), ERR_func_error_string(l), file, + line, + (flags & ERR_TXT_STRING) && data && *data + ? data + : ERR_reason_error_string(l), + data, data ? (int)strlen(data) : -1, + flags & ERR_TXT_STRING); + } +} +#endif + + +/** + * @returns a cert structure with a copy of the memory in \p buffer on success, + * or NULL on failure in which case errstr will have a human-readable + * error string written to it. + */ +static rd_kafka_cert_t *rd_kafka_cert_new(const rd_kafka_conf_t *conf, + rd_kafka_cert_type_t type, + rd_kafka_cert_enc_t encoding, + const void *buffer, + size_t size, + char *errstr, + size_t errstr_size) { + static const rd_bool_t + valid[RD_KAFKA_CERT__CNT][RD_KAFKA_CERT_ENC__CNT] = { + /* Valid encodings per certificate type */ + [RD_KAFKA_CERT_PUBLIC_KEY] = {[RD_KAFKA_CERT_ENC_PKCS12] = + rd_true, + [RD_KAFKA_CERT_ENC_DER] = rd_true, + [RD_KAFKA_CERT_ENC_PEM] = + rd_true}, + [RD_KAFKA_CERT_PRIVATE_KEY] = + {[RD_KAFKA_CERT_ENC_PKCS12] = rd_true, + [RD_KAFKA_CERT_ENC_DER] = rd_true, + [RD_KAFKA_CERT_ENC_PEM] = rd_true}, + [RD_KAFKA_CERT_CA] = {[RD_KAFKA_CERT_ENC_PKCS12] = rd_true, + [RD_KAFKA_CERT_ENC_DER] = rd_true, + [RD_KAFKA_CERT_ENC_PEM] = rd_true}, + }; + const char *action = "", *ssl_errstr = NULL, *extra = ""; + BIO *bio; + rd_kafka_cert_t *cert = NULL; + PKCS12 *p12 = NULL; + + if ((int)type < 0 || type >= RD_KAFKA_CERT__CNT) { + rd_snprintf(errstr, errstr_size, "Invalid certificate type %d", + (int)type); + return NULL; + } + + if ((int)encoding < 0 || encoding >= RD_KAFKA_CERT_ENC__CNT) { + rd_snprintf(errstr, errstr_size, + "Invalid certificate encoding %d", (int)encoding); + return NULL; + } + + if (!valid[type][encoding]) { + rd_snprintf(errstr, errstr_size, + "Invalid encoding %s for certificate type %s", + rd_kafka_cert_enc_names[encoding], + rd_kafka_cert_type_names[type]); + return NULL; + } + + action = "read memory"; + bio = BIO_new_mem_buf((void *)buffer, (long)size); + if (!bio) + goto fail; + + if (encoding == RD_KAFKA_CERT_ENC_PKCS12) { + action = "read PKCS#12"; + p12 = d2i_PKCS12_bio(bio, NULL); + if (!p12) + goto fail; + } + + cert = rd_calloc(1, sizeof(*cert)); + cert->type = type; + cert->encoding = encoding; + + rd_refcnt_init(&cert->refcnt, 1); + + switch (type) { + case RD_KAFKA_CERT_CA: + cert->store = X509_STORE_new(); + + switch (encoding) { + case RD_KAFKA_CERT_ENC_PKCS12: { + EVP_PKEY *ign_pkey; + X509 *ign_cert; + STACK_OF(X509) *cas = NULL; + int i; + + action = "parse PKCS#12"; + if (!PKCS12_parse(p12, conf->ssl.key_password, + &ign_pkey, &ign_cert, &cas)) + goto fail; + + EVP_PKEY_free(ign_pkey); + X509_free(ign_cert); + + if (!cas || sk_X509_num(cas) < 1) { + action = + "retrieve at least one CA " + "cert from PKCS#12"; + if (cas) + sk_X509_pop_free(cas, X509_free); + goto fail; + } + + for (i = 0; i < sk_X509_num(cas); i++) { + if (!X509_STORE_add_cert( + cert->store, sk_X509_value(cas, i))) { + action = + "add certificate to " + "X.509 store"; + sk_X509_pop_free(cas, X509_free); + goto fail; + } + } + + sk_X509_pop_free(cas, X509_free); + } break; + + case RD_KAFKA_CERT_ENC_DER: { + X509 *x509; + + action = "read DER / X.509 ASN.1"; + if (!(x509 = d2i_X509_bio(bio, NULL))) + goto fail; + + if (!X509_STORE_add_cert(cert->store, x509)) { + action = + "add certificate to " + "X.509 store"; + X509_free(x509); + goto fail; + } + + X509_free(x509); + } break; + + case RD_KAFKA_CERT_ENC_PEM: { + X509 *x509; + int cnt = 0; + + action = "read PEM"; + + /* This will read one certificate per call + * until an error occurs or the end of the + * buffer is reached (which is an error + * we'll need to clear). */ + while ((x509 = PEM_read_bio_X509( + bio, NULL, rd_kafka_conf_ssl_passwd_cb, + (void *)conf))) { + + if (!X509_STORE_add_cert(cert->store, x509)) { + action = + "add certificate to " + "X.509 store"; + X509_free(x509); + goto fail; + } + + X509_free(x509); + cnt++; + } + + if (!BIO_eof(bio)) { + /* Encountered parse error before + * reaching end, propagate error and + * fail. */ + goto fail; + } + + if (!cnt) { + action = + "retrieve at least one " + "CA cert from PEM"; + + goto fail; + } + + /* Reached end, which is raised as an error, + * so clear it since it is not. */ + ERR_clear_error(); + } break; + + default: + RD_NOTREACHED(); + break; + } + break; + + + case RD_KAFKA_CERT_PUBLIC_KEY: + switch (encoding) { + case RD_KAFKA_CERT_ENC_PKCS12: { + EVP_PKEY *ign_pkey; + + action = "parse PKCS#12"; + if (!PKCS12_parse(p12, conf->ssl.key_password, + &ign_pkey, &cert->x509, NULL)) + goto fail; + + EVP_PKEY_free(ign_pkey); + + action = "retrieve public key"; + if (!cert->x509) + goto fail; + } break; + + case RD_KAFKA_CERT_ENC_DER: + action = "read DER / X.509 ASN.1"; + cert->x509 = d2i_X509_bio(bio, NULL); + if (!cert->x509) + goto fail; + break; + + case RD_KAFKA_CERT_ENC_PEM: + action = "read PEM"; + cert->x509 = PEM_read_bio_X509( + bio, NULL, rd_kafka_conf_ssl_passwd_cb, + (void *)conf); + if (!cert->x509) + goto fail; + break; + + default: + RD_NOTREACHED(); + break; + } + break; + + + case RD_KAFKA_CERT_PRIVATE_KEY: + switch (encoding) { + case RD_KAFKA_CERT_ENC_PKCS12: { + X509 *x509; + + action = "parse PKCS#12"; + if (!PKCS12_parse(p12, conf->ssl.key_password, + &cert->pkey, &x509, NULL)) + goto fail; + + X509_free(x509); + + action = "retrieve private key"; + if (!cert->pkey) + goto fail; + } break; + + case RD_KAFKA_CERT_ENC_DER: + action = + "read DER / X.509 ASN.1 and " + "convert to EVP_PKEY"; + cert->pkey = d2i_PrivateKey_bio(bio, NULL); + if (!cert->pkey) + goto fail; + break; + + case RD_KAFKA_CERT_ENC_PEM: + action = "read PEM"; + cert->pkey = PEM_read_bio_PrivateKey( + bio, NULL, rd_kafka_conf_ssl_passwd_cb, + (void *)conf); + if (!cert->pkey) + goto fail; + break; + + default: + RD_NOTREACHED(); + break; + } + break; + + default: + RD_NOTREACHED(); + break; + } + + if (bio) + BIO_free(bio); + if (p12) + PKCS12_free(p12); + + return cert; + +fail: + ssl_errstr = rd_kafka_ssl_last_error_str(); + + /* OpenSSL 3.x does not provide obsolete ciphers out of the box, so + * let's try to identify such an error message and guide the user + * to what to do (set up a provider config file and point to it + * through the OPENSSL_CONF environment variable). + * We could call OSSL_PROVIDER_load("legacy") here, but that would be + * a non-obvious side-effect of calling this set function. */ + if (strstr(action, "parse") && strstr(ssl_errstr, "Algorithm")) + extra = + ": legacy ciphers may require loading OpenSSL's \"legacy\" " + "provider through an OPENSSL_CONF configuration file"; + + rd_snprintf(errstr, errstr_size, "Failed to %s %s (encoding %s): %s%s", + action, rd_kafka_cert_type_names[type], + rd_kafka_cert_enc_names[encoding], ssl_errstr, extra); + + if (cert) + rd_kafka_cert_destroy(cert); + if (bio) + BIO_free(bio); + if (p12) + PKCS12_free(p12); + + return NULL; +} +#endif /* WITH_SSL */ + + +/** + * @name Public API + * @brief These public methods must be available regardless if + * librdkafka was built with OpenSSL or not. + * @{ + */ + +rd_kafka_conf_res_t rd_kafka_conf_set_ssl_cert(rd_kafka_conf_t *conf, + rd_kafka_cert_type_t cert_type, + rd_kafka_cert_enc_t cert_enc, + const void *buffer, + size_t size, + char *errstr, + size_t errstr_size) { +#if !WITH_SSL + rd_snprintf(errstr, errstr_size, + "librdkafka not built with OpenSSL support"); + return RD_KAFKA_CONF_INVALID; +#else + rd_kafka_cert_t *cert; + rd_kafka_cert_t **cert_map[RD_KAFKA_CERT__CNT] = { + [RD_KAFKA_CERT_PUBLIC_KEY] = &conf->ssl.cert, + [RD_KAFKA_CERT_PRIVATE_KEY] = &conf->ssl.key, + [RD_KAFKA_CERT_CA] = &conf->ssl.ca}; + rd_kafka_cert_t **certp; + + if ((int)cert_type < 0 || cert_type >= RD_KAFKA_CERT__CNT) { + rd_snprintf(errstr, errstr_size, "Invalid certificate type %d", + (int)cert_type); + return RD_KAFKA_CONF_INVALID; + } + + /* Make sure OpenSSL is loaded */ + rd_kafka_global_init(); + + certp = cert_map[cert_type]; + + if (!buffer) { + /* Clear current value */ + if (*certp) { + rd_kafka_cert_destroy(*certp); + *certp = NULL; + } + return RD_KAFKA_CONF_OK; + } + + cert = rd_kafka_cert_new(conf, cert_type, cert_enc, buffer, size, + errstr, errstr_size); + if (!cert) + return RD_KAFKA_CONF_INVALID; + + if (*certp) + rd_kafka_cert_destroy(*certp); + + *certp = cert; + + return RD_KAFKA_CONF_OK; +#endif +} + + + +/** + * @brief Destructor called when configuration object is destroyed. + */ +void rd_kafka_conf_cert_dtor(int scope, void *pconf) { +#if WITH_SSL + rd_kafka_conf_t *conf = pconf; + assert(scope == _RK_GLOBAL); + if (conf->ssl.key) { + rd_kafka_cert_destroy(conf->ssl.key); + conf->ssl.key = NULL; + } + if (conf->ssl.cert) { + rd_kafka_cert_destroy(conf->ssl.cert); + conf->ssl.cert = NULL; + } + if (conf->ssl.ca) { + rd_kafka_cert_destroy(conf->ssl.ca); + conf->ssl.ca = NULL; + } +#endif +} + +/** + * @brief Copy-constructor called when configuration object \p psrcp is + * duplicated to \p dstp. + */ +void rd_kafka_conf_cert_copy(int scope, + void *pdst, + const void *psrc, + void *dstptr, + const void *srcptr, + size_t filter_cnt, + const char **filter) { +#if WITH_SSL + rd_kafka_conf_t *dconf = pdst; + const rd_kafka_conf_t *sconf = psrc; + + assert(scope == _RK_GLOBAL); + + /* Free and reset any exist certs on the destination conf */ + rd_kafka_conf_cert_dtor(scope, pdst); + + if (sconf->ssl.key) + dconf->ssl.key = rd_kafka_cert_dup(sconf->ssl.key); + + if (sconf->ssl.cert) + dconf->ssl.cert = rd_kafka_cert_dup(sconf->ssl.cert); + + if (sconf->ssl.ca) + dconf->ssl.ca = rd_kafka_cert_dup(sconf->ssl.ca); +#endif +} + + +/**@}*/ |