{"id":102,"date":"2023-01-08T23:05:22","date_gmt":"2023-01-08T15:05:22","guid":{"rendered":"http:\/\/zysgmzb.club\/?p=102"},"modified":"2024-01-28T09:23:24","modified_gmt":"2024-01-28T01:23:24","slug":"realworldctf-5th-longrange%e9%a2%98%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/zysgmzb.club\/index.php\/archives\/102","title":{"rendered":"RealWorldCTF 5th LongRange\u9898\u89e3"},"content":{"rendered":"<p>\u9996\u5148\u6839\u636e\u9898\u76ee\u540d\u548c\u97f3\u9891\u7684hex\u4fe1\u606f\u57fa\u672c\u786e\u5b9a\u662fLoRa\u4e86<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/pic.imgdb.cn\/item\/63bac68fbe43e0d30e5ff368.jpg\" alt=\"\" \/><\/p>\n<p>\u7136\u540e\u5c31\u628a\u76ee\u5149\u653e\u5728\u4e86<a href=\"https:\/\/github.com\/gnuradio\/gnuradio\">gnuradio<\/a>\u7684<a href=\"https:\/\/github.com\/rpp0\/gr-lora\">gr-lora<\/a>\u63d2\u4ef6\u4e0a<\/p>\n<p>\u5386\u7ecf\u8270\u96be\u9669\u963b\u7ec8\u4e8e\u88c5\u597d\uff0c\u73b0\u5728\u8981\u505a\u7684\u5c31\u662f\u56f4\u7ed5\u7740wav\u7684exif\u4fe1\u606f\u91cc\u7684500.512.5mHz\u548c375kHz\u4e24\u4e2a\u6570\u636e\u4e86<\/p>\n<p>\u5728\u7b80\u5355\u4e86\u89e3gnuradio\u7684\u7528\u6cd5\u4e4b\u540e\uff0c\u5c31\u53ef\u4ee5\u5f00\u641e\u4e86<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/pic.imgdb.cn\/item\/63bac79fbe43e0d30e622a35.jpg\" alt=\"\" \/><\/p>\n<p>\u6700\u7ec8\u6210\u679c\u5982\u4e0a\uff0c\u5927\u6982\u5206\u4e09\u5757\uff0c\u7b2c\u4e00\u5757\u662f\u6253\u5f00wavIQ\u6587\u4ef6\u540e\u5c06wav\u7684stereo stream\u8f6c\u6210complex stream<\/p>\n<p>\u7b2c\u4e8c\u5757\u662f\u9650\u6d41\u4e4b\u540e\u4f20\u5230LoRa Receiver\u91cc\u8fdb\u884c\u89e3\u7801<\/p>\n<p>\u7b2c\u4e09\u5757\u662f\u7ed9\u4e2a\u9891\u8c31\u56fe\u770b\u770b\uff0c\u6ca1\u592a\u5927\u4f5c\u7528<\/p>\n<p>\u6700\u91cd\u8981\u7684\u662fLoRa Receiver\u91cc\u7684\u6570\u636e\u5e94\u8be5\u600e\u4e48\u586b\u5199\uff0c\u9996\u5148\u5df2\u77e5\u7684\u662f\u9891\u7387500.512.5mHz\u548c\u91c7\u6837\u7387375kHz\uff0c\u5269\u4e0b\u7684\u5c31\u9700\u8981\u8bd5\u4e00\u8bd5\u4e86\uff0c\u8fd8\u6709\u8981\u6ce8\u610f\u5e26\u5bbd\u548c\u91c7\u6837\u7387\u4f3c\u4e4e\u662f\u6709\u4e00\u5b9a\u5173\u7cfb\u7684\uff0c\u91c7\u6837\u7387\u5927\u4e8e\u5e26\u5bbd\u76842\u500d\u5e76\u4e14\u4e8c\u8005\u5e38\u5448\u6574\u6570\u500d\u5173\u7cfb<\/p>\n<p>\u5206\u6790\u6b63\u786e\u53c2\u6570\u7528\u5230\u4e86wav\u6587\u4ef6exif\u91cc\u7684\u7f51\u7ad9SDR-Radio.com\u91cc\u7684\u8f6f\u4ef6\uff0c\u5b89\u88c5\u540e\u5bfc\u5165\u97f3\u9891\u5e76\u5927\u81f4\u8c03\u4e00\u4e0b\u518d\u64ad\u653e\uff0c\u5982\u4e0b\u56fe\u6240\u793a<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/pic.imgdb.cn\/item\/63bad217be43e0d30e7bacf4.jpg\" alt=\"\" \/><\/p>\n<p>\u4e0d\u96be\u770b\u51fa\uff0c\u7ed9\u51fa\u7684500.512.5mHz\u5e76\u4e0d\u5728\u6ce2\u7684\u4e2d\u5fc3\uff0c\u6240\u4ee5\u8fd9\u91cc\u624b\u52a8\u8c03\u4e00\u4e0b\uff0c\u5f97\u5230\u6ce2\u7684\u4e2d\u5fc3\u9891\u7387\u5927\u7ea6\u4e3a500.497.2mHz<\/p>\n<p>\u540c\u65f6\uff0c\u4e5f\u53ef\u4ee5\u5f97\u5230\u5e26\u5bbd\uff0c\u5373\u8fd9\u4e2a\u4fe1\u53f7\u7684\u5bbd\u5ea6\uff0c\u7ea6\u4e3a125kHz\uff0c\u4e5f\u6070\u597d\u548c\u91c7\u6837\u7387\u6709\u6574\u6570\u500d\u5173\u7cfb\uff0c\u5927\u81f4\u5982\u4e0b\u56fe\u6240\u793a<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/pic.imgdb.cn\/item\/63bad46bbe43e0d30e8130e6.jpg\" alt=\"\" \/><\/p>\n<p>Spreading factor\u7684\u8303\u56f4\u662f6-12\uff0c\u8fd9\u91cc\u53ef\u4ee5\u624b\u52a8\u8bd5<\/p>\n<p>\u6709\u4e86\u8fd9\u4e9b\u53c2\u6570\uff0c\u5c31\u53ef\u4ee5\u5f00\u59cb\u89e3\u7801\u4e86<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/pic.imgdb.cn\/item\/63badb19be43e0d30e9031af.jpg\" alt=\"\" \/><\/p>\n<p>\u6700\u7ec8\u8fd0\u884c\u7ed3\u679c\u5982\u4e0b<\/p>\n<pre class=\"prettyprint linenums\" ><code>Generating: &#039;\/home\/zysgmzb\/zys\/gr-lora\/apps\/lora_receive_file.py&#039;\n\nExecuting: \/usr\/bin\/python3 -u \/home\/zysgmzb\/zys\/gr-lora\/apps\/lora_receive_file.py\n\nBits (nominal) per symbol:      4\nBins per symbol:        256\nSamples per symbol:     768\nDecimation:             3\n 08 30 00 41 6e 79 6f 6e 65 20 3f 8e dc (Anyone ?)\n 08 30 00 41 6e 79 6f 6e 65 20 3f 8e dc (Anyone ?)\n 08 30 00 41 6e 79 6f 6e 65 20 3f 8e dc (Anyone ?)\n 08 30 00 41 6e 79 6f 6e 65 20 3f 8e dc (Anyone ?)\n 08 30 00 41 6e 79 6f 6e 65 20 3f 8e dc (Anyone ?)\n 08 30 00 41 6e 79 6f 6e 65 20 3f 8e dc (Anyone ?)\n 08 30 00 41 6e 79 6f 6e 65 20 3f 8e dc (Anyone ?)\n 08 30 00 41 6e 79 6f 6e 65 20 3f 8e dc (Anyone ?)\n 08 30 00 41 6e 79 6f 6e 65 20 3f 8e dc (Anyone ?)\n 4e 31 70 57 65 6c 63 6f 6d 65 2c 20 42 65 20 41 20 52 57 43 54 46 65 72 21 20 72 77 63 74 66 7b 47 72 33 33 74 5f 46 72 30 6d 5f 4c 6f 52 34 5f 32 36 39 33 32 38 30 32 66 32 36 61 38 63 39 62 34 35 31 39 65 62 36 66 39 30 30 66 36 37 36 66 7d 83 c3 (Welcome, Be A RWCTFer! rwctf{Gr33t_Fr0m_LoR4_26932802f26a8c9b4519eb6f900f676f})\n 08 30 00 41 6e 79 6f 6e 65 20 3f 8e dc (Anyone ?)\n 08 30 00 41 6e 79 6f 6e 65 20 3f 8e dc (Anyone ?)\n 08 30 00 41 22 7d 23 9e 98 33 ba 22 6a (A&quot;}#3&quot;j)\n 08 30 00 41 6e 79 6f 6e 65 20 3f 8e dc (Anyone ?)\n\n>&gt;&gt; Done<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u9996\u5148\u6839\u636e\u9898\u76ee\u540d\u548c\u97f3\u9891\u7684hex\u4fe1\u606f\u57fa\u672c\u786e\u5b9a\u662fLoRa\u4e86 \u7136\u540e\u5c31\u628a\u76ee\u5149\u653e\u5728\u4e86gnuradio\u7684gr-lora\u63d2\u4ef6\u4e0a \u5386\u7ecf\u8270\u96be\u9669\u963b\u7ec8\u4e8e\u88c5\u597d\uff0c\u73b0\u5728\u8981\u505a\u7684\u5c31\u662f\u56f4\u7ed5\u7740wav\u7684exif\u4fe1\u606f\u91cc\u7684500.512.5mHz\u548c375kHz\u4e24\u4e2a\u6570\u636e\u4e86 \u5728\u7b80\u5355\u4e86\u89e3gnuradio\u7684\u7528\u6cd5\u4e4b\u540e\uff0c\u5c31\u53ef\u4ee5\u5f00\u641e\u4e86 \u6700\u7ec8\u6210\u679c\u5982\u4e0a\uff0c\u5927\u6982\u5206\u4e09\u5757\uff0c\u7b2c\u4e00\u5757\u662f\u6253\u5f00wavIQ\u6587\u4ef6\u540e\u5c06wav\u7684stereo stream\u8f6c\u6210complex strea [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-102","post","type-post","status-publish","format-standard","hentry","category-wp"],"_links":{"self":[{"href":"https:\/\/zysgmzb.club\/index.php\/wp-json\/wp\/v2\/posts\/102","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zysgmzb.club\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zysgmzb.club\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zysgmzb.club\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/zysgmzb.club\/index.php\/wp-json\/wp\/v2\/comments?post=102"}],"version-history":[{"count":5,"href":"https:\/\/zysgmzb.club\/index.php\/wp-json\/wp\/v2\/posts\/102\/revisions"}],"predecessor-version":[{"id":293,"href":"https:\/\/zysgmzb.club\/index.php\/wp-json\/wp\/v2\/posts\/102\/revisions\/293"}],"wp:attachment":[{"href":"https:\/\/zysgmzb.club\/index.php\/wp-json\/wp\/v2\/media?parent=102"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zysgmzb.club\/index.php\/wp-json\/wp\/v2\/categories?post=102"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zysgmzb.club\/index.php\/wp-json\/wp\/v2\/tags?post=102"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}