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closes #11
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,141 @@ | ||
| /* | ||
| * Copyright (c) 2014 Jan-Piet Mens <jpmens()gmail.com> | ||
| * 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. | ||
| * 3. Neither the name of mosquitto nor the names of its | ||
| * contributors may be used to endorse or promote products derived from | ||
| * this software without specific prior written permission. | ||
| * | ||
| * 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. | ||
| */ | ||
|
|
||
| #include <stdlib.h> | ||
| #include <stdio.h> | ||
| #include <string.h> | ||
| #include <time.h> | ||
| #include <mosquitto.h> | ||
| #include "cache.h" | ||
| #include <openssl/evp.h> | ||
| #include <openssl/sha.h> | ||
| #include "uthash.h" | ||
|
|
||
| struct aclcache { | ||
| char hex[SHA_DIGEST_LENGTH * 2 + 1]; /* key within struct */ | ||
| int granted; | ||
| time_t tics; | ||
| UT_hash_handle hh; | ||
| }; | ||
|
|
||
| static struct aclcache *aclcache = NULL; | ||
|
|
||
| static unsigned int sha_hash(const char *data, size_t size, unsigned char *out) | ||
| { | ||
| unsigned int md_len = -1; | ||
| const EVP_MD *md = EVP_get_digestbyname("SHA1"); | ||
|
|
||
| if (md != NULL) { | ||
| EVP_MD_CTX mdctx; | ||
| EVP_MD_CTX_init(&mdctx); | ||
| EVP_DigestInit_ex(&mdctx, md, NULL); | ||
| EVP_DigestUpdate(&mdctx, data, size); | ||
| EVP_DigestFinal_ex(&mdctx, out, &md_len); | ||
| EVP_MD_CTX_cleanup(&mdctx); | ||
| } | ||
| return md_len; | ||
| } | ||
|
|
||
| static void hexify(const char *clientid, const char *username, const char *topic, int access, char *hex) | ||
| { | ||
| char *data; | ||
| unsigned char hashdata[SHA_DIGEST_LENGTH]; | ||
| int mdlen, i; | ||
|
|
||
| data = malloc(strlen(clientid) + strlen(username) + strlen(topic) + 20); | ||
| sprintf(data, "%s:%s:%s:%d", clientid, username, topic, access); | ||
|
|
||
| mdlen = sha_hash(data, strlen(data), hashdata); | ||
| if (mdlen != SHA_DIGEST_LENGTH) { | ||
| free(data); | ||
| return; | ||
| } | ||
|
|
||
| // printf("mdlen=%d, string=%s\n\thash=", mdlen, data); | ||
| for (i = 0, *hex = 0; i < sizeof(hashdata) / sizeof(hashdata[0]); i++) { | ||
| sprintf(hex + (i*2), "%02X", hashdata[i]); | ||
| } | ||
| // printf("%s\n", hex); | ||
|
|
||
|
|
||
| free(data); | ||
| } | ||
|
|
||
| /* access is desired read/write access | ||
| * granted is what Mosquitto auth-plug actually granted | ||
| */ | ||
|
|
||
| void acl_cache(const char *clientid, const char *username, const char *topic, int access, int granted, time_t cachetics) | ||
| { | ||
| char hex[SHA_DIGEST_LENGTH * 2 + 1]; | ||
| struct aclcache *a; | ||
|
|
||
| hexify(clientid, username, topic, access, hex); | ||
|
|
||
| HASH_FIND_STR(aclcache, hex, a); | ||
| if (a) { | ||
| granted = a->granted; | ||
|
|
||
| if (time(NULL) > (a->tics + cachetics)) { | ||
| printf("EXPIRED!!!!!!!!!!!!!\n"); | ||
| HASH_DEL(aclcache, a); | ||
| } | ||
| } else { | ||
| a = (struct aclcache *)malloc(sizeof(struct aclcache)); | ||
| strcpy(a->hex, hex); | ||
| a->granted = granted; | ||
| a->tics = time(NULL); | ||
| HASH_ADD_STR(aclcache, hex, a); | ||
| } | ||
| } | ||
|
|
||
| int cache_q(const char *clientid, const char *username, const char *topic, int access, time_t cachetics) | ||
| { | ||
| char hex[SHA_DIGEST_LENGTH * 2 + 1]; | ||
| struct aclcache *a; | ||
| int granted = MOSQ_ERR_UNKNOWN; | ||
|
|
||
| hexify(clientid, username, topic, access, hex); | ||
|
|
||
| HASH_FIND_STR(aclcache, hex, a); | ||
| if (a) { | ||
| // printf("---> CACHED! %d\n", a->granted); | ||
|
|
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| granted = a->granted; | ||
|
|
||
| if (time(NULL) > (a->tics + cachetics)) { | ||
| printf("EXPIRED!!!!!!!!!!!!!\n"); | ||
| HASH_DEL(aclcache, a); | ||
| } | ||
| } | ||
|
|
||
| return (granted); | ||
| } | ||
|
|
||
|
|
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,31 @@ | ||
| /* | ||
| * Copyright (c) 2014 Jan-Piet Mens <jpmens()gmail.com> | ||
| * 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. | ||
| * 3. Neither the name of mosquitto nor the names of its | ||
| * contributors may be used to endorse or promote products derived from | ||
| * this software without specific prior written permission. | ||
| * | ||
| * 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. | ||
| */ | ||
|
|
||
| void acl_cache(const char *clientid, const char *username, const char *topic, int access, int granted, time_t cachetics); | ||
| int cache_q(const char *clientid, const char *username, const char *topic, int access, time_t cachetics); |