{"id":149574,"date":"2020-08-29T08:12:24","date_gmt":"2020-08-29T00:12:24","guid":{"rendered":"http:\/\/4563.org\/?p=149574"},"modified":"2020-08-29T08:12:24","modified_gmt":"2020-08-29T00:12:24","slug":"tls1-3-%e5%af%86%e9%92%a5%e8%a1%8d%e7%94%9f%e8%ae%a1%e7%ae%97%e6%96%b9%e6%b3%95%e5%92%8c%e5%8a%9f%e8%83%bd","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=149574","title":{"rendered":"TLS1.3 \u5bc6\u94a5\u884d\u751f\u8ba1\u7b97\u65b9\u6cd5\u548c\u529f\u80fd"},"content":{"rendered":"
\n
\n
\n

TLS1.3 \u5bc6\u94a5\u884d\u751f\u8ba1\u7b97\u65b9\u6cd5\u548c\u529f\u80fd <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : hxndg <\/span> <\/i> 8<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u524d\u8a00<\/h2>\n

Tls1.3 \u7684 RFC \uff08 RFC8446 \uff09\u4e2d\u89c4\u5b9a\u4e86\u5404\u79cd\u5bc6\u94a5\u7684\u7b97\u6cd5\u548c\u7528\u9014\uff0c\u867d\u7136\u6211\u6253\u7b97\u5728\u4e0d\u4e45\u7684\u5c06\u6765\u7ffb\u8bd1 TLS1.3 \u7684 RFC\uff0c\u51fa\u4e8e\u65b9\u4fbf\u7684\u8003\u8651\uff0c\u8fd8\u662f\u7b80\u5355\u8bb2\u8bb2 TLS1.3 \u4e2d\u7684\u5404\u79cd\u5bc6\u94a5\u8ba1\u7b97\u65b9\u6cd5\u3002\u56e0\u4e3a RFC \u7684\u5bc6\u94a5\u884d\u751f\u6d41\u7a0b\u4e2d\u6ca1\u6709\u753b\u51fa PSK \u7684\u8ba1\u7b97\u8fc7\u7a0b\uff0c\u6211\u4e5f\u4f1a\u5728\u672c\u6587\u9644\u52a0 PSK \u7684\u8ba1\u7b97\u6d41\u7a0b\u5982\u679c\u6587\u7ae0\u5e2e\u5230\u4e86\u4f60 \/\u6216\u8005\u4f9d\u7136\u5b58\u5728\u4e00\u4e9b\u95ee\u9898\uff0c\u6b22\u8fce\u7ed9\u6211\u4e00\u4e9b\u53cd\u9988\u3002<\/p>\n

\u6211\u672c\u6765\u662f\u5199\u5230\u4e86\u535a\u5ba2\u91cc\u7684\u628a\u8fd9\u6587\u7ae0\uff0c\u60f3\u4e86\u60f3\u8fd8\u662f\u5728 V \u7ad9\u518d\u53d1\u4e00\u904d\u5427\uff0c\u6211\u5e73\u65f6\u6709 V \u7ad9\u68c0\u7d22\u8d44\u6599\u7684\u4e60\u60ef\u3002\u5c31\u987a\u4fbf\u53d1\u51fa\u6765\u4e86\u3002<\/p>\n

\u5bc6\u94a5\u884d\u751f\u6d41\u7a0b<\/h2>\n

\u5bc6\u94a5\u884d\u751f\u6d41\u7a0b\u4e2d\u4e00\u4e9b\u8ba1\u7b97\u65b9\u6cd5<\/h3>\n

\u5bc6\u94a5\u884d\u751f\u7684\u6d41\u7a0b\u4f9d\u8d56\u4e8e RFC5869 \u5b9a\u4e49\u7684 HKDF-Extract \u548c HKDF-Expand \u64cd\u4f5c\u6d41\u7a0b\uff0c\u8fd9\u4e24\u4e2a\u6d41\u7a0b\u7ed3\u5408\u5230\u4e00\u8d77\u624d\u7b97\u662f\u4ece\u5bc6\u94a5\u539f\u59cb\u6750\u6599\uff08 key material)\u884d\u751f\u51fa\u5b89\u5168\u7684\u7b26\u5408\u957f\u5ea6\u9700\u6c42\u7684\u5bc6\u94a5\u3002TLS1.3 \u5b9a\u4e49\u4e86\u4e00\u4e2a HKDF-Expand-Label \u5373\u5e26\u884d\u751f\u6807\u7b7e\u7684 HKDF-Expand \u64cd\u4f5c\uff0c\u8fd9\u4e2a\u64cd\u4f5c\u7684\u6d41\u7a0b\u662f\uff1a<\/p>\n

\n

Derive-Secret(Secret, Label, Messages) = HKDF-Expand-Label(Secret, Label,Transcript-Hash(Messages), Hash.length) = HKDF-Expand(Secret, HkdfLabel, Hash.length)<\/p>\n<\/blockquote>\n

\u5982\u679c\u4f60\u77e5\u9053 HKDF-Expand \u7684\u64cd\u4f5c\uff08\u6211\u4f1a\u4e0d\u4e45\u7ffb\u8bd1 RFC5869 \u5e76\u4e14\u8bb2\u89e3 HKDF \u7684\u4e24\u4e2a\u64cd\u4f5c\uff09\uff0c\u95ee\u9898\u5c31\u53d8\u6210\u4e86 HkdfLabel \u662f\u5982\u4f55\u62fc\u63a5\u7684\u3002\u6309\u7167 RFC\uff0cHkdfLabel \u7684\u62fc\u63a5\u65b9\u5f0f\u5982\u4e0b\uff1a<\/p>\n

\n

struct { uint16 length = Length; opaque label<7..255> = “tls13 ” + Label; opaque context<0..255> = Context; } HkdfLabel;<\/p>\n<\/blockquote>\n

\u9996\u5148\u62fc\u63a5\u4e00\u4e2a uint16_t \u7684\u201c\u957f\u5ea6\u201d\uff0c\u4e5f\u5c31\u662f\u4e24\u4e2a\u5b57\u8282\uff0c\u8be5\u201c\u957f\u5ea6\u201d\u7684\u6570\u503c\u7b49\u4e8e\u5f53\u524d\u7b97\u6cd5\u4f7f\u7528\u7684 hash \u7b97\u6cd5\u7684\u957f\u5ea6\uff0c\u6bd4\u65b9\u8bf4\u4f60\u4f7f\u7528 ciphersuite \u662f TLS_AES_256_GCM_SHA384\uff0c\u6240\u4ee5\u8be5\u201c\u957f\u5ea6\u7684\u6570\u503c\u201d\u7b49\u4e8e SHA384 \u8ba1\u7b97\u7ed3\u679c\u7684\u957f\u5ea6\uff0c\u4e5f\u5c31\u662f 384\/8=48 \u5b57\u8282\u3002\u4e4b\u540e\u5148\u62fc\u63a5\u4e0a\u4e00\u4e2a uint8_t \u7684\u201c\u5b57\u7b26\u4e32\u957f\u5ea6\u201d\uff0c\u8fd9\u4e2a\u957f\u5ea6\u7528\u6765\u6807\u8bc6\u6574\u4e2a\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\uff0c\u5305\u62ec”tls1.3″+Label \u7684\u957f\u5ea6\uff0c\u7136\u540e\u9644\u52a0\u4e0a\u5b57\u7b26\u4e32”tls13″\uff08\u6211\u8fd9\u91cc\u9644\u52a0\u7684\u65f6\u5019\u53ef\u4e0d\u5305\u62ec\u4e24\u4e2a\u53cc\u5f15\u53f7\u554a\uff09\uff0c\u518d\u62fc\u63a5\u4e0a Label\uff0c\u6bd4\u65b9\u8bf4\u4f60\u6b64\u65f6\u5728\u8ba1\u7b97\u590d\u7528\u4e3b\u5bc6\u94a5(resumption_master_secret)\uff0c\u90a3\u4e48\u8fd9\u65f6\u5019\u7684 Label \u5c31\u662f”res master”\u3002\u6700\u540e\u62fc\u63a5\u4e00\u4e2a uint8_t \u7684 Context \u957f\u5ea6\uff0c\u518d\u62fc\u63a5 Context \u3002Context \u4e00\u822c\u662f\u5bf9\u6d88\u606f\u505a hash \u8ba1\u7b97\u5f97\u51fa\u7684\u3002<\/p>\n

\u5bc6\u94a5\u884d\u751f\u6d41\u7a0b\u53ca\u6bcf\u4e2a\u5bc6\u94a5\u7684\u4f5c\u7528<\/h3>\n

\u8fd9\u90e8\u5206\u6211\u662f\u76f4\u63a5\u7c98\u8d34\u7684 TLS1.3 RFC \u7684\u5185\u5bb9\uff0c\u89c1\u4e0b\uff0c\u7531\u4e8e\u7ffb\u8bd1\u53ef\u80fd\u4ea7\u751f\u4e89\u8bae\uff0c\u8fd9\u90e8\u5206\u6211\u7528\u7684\u662f\u539f\u56fe\u3002 \"TLS1.3 \u5bc6\u94a5\u884d\u751f\u6d41\u7a0b\u4e2d\u6709\u4e24\u4e2a\u7528\u4e8e\u8ba1\u7b97\u7684\u57fa\u7840\u5bc6\u94a5\uff0c\u5206\u522b\u662f PSK \u548c ECDHE secret \u3002PSK \u901a\u8fc7\u4e0a\u6b21\u8fde\u63a5\u7531\u590d\u7528\u4e3b\u5bc6\u94a5\u8ba1\u7b97\u5f97\u51fa \/\u5e26\u5916\u6570\u636e\u4f20\u8f93\u5efa\u7acb\uff0c(EC)DHE \u5bc6\u94a5\u5219\u662f\u5b8c\u6574\u63e1\u624b\u65f6\u534f\u5546\u4ea7\u751f\u3002\u8fd9\u4e24\u4e2a\u5bc6\u94a5\u5e76\u4e0d\u4e00\u5b9a\u6bcf\u6b21\u90fd\u5b58\u5728\uff0c\u6bd4\u65b9\u8bf4\u5b8c\u6574\u63e1\u624b\u7684\u60c5\u51b5\u4e0b\uff0c\u8ba1\u7b97\u521d\u671f\u5bc6\u94a5\uff08 Early Secret \uff09\u7684\u65f6\u5019\u53ef\u80fd\u4e0d\u5b58\u5728 PSK\uff0c\u90a3\u4e48 PSK \u5c31\u7531\u4e00\u4e32\u957f\u5ea6\u7b49\u540c\u4e8e\u5f53\u524d ciphersuite \u4f7f\u7528\u7684 hash \u7b97\u6cd5\u7ed3\u679c\u7684\u957f\u5ea6\u7684 0x00 \u4ee3\u66ff\uff0c\u6bd4\u65b9\u8bf4 ciphersuite \u662f TLS_AES_256_GCM_SHA384\uff0c\u90a3\u4e48 PSK \u5c31\u7528\u957f\u5ea6\u7b49\u4e8e 48 \u7684 0x00 \u5185\u5bb9\u66ff\u4ee3\u3002\u6211\u5728\u5199 TLS1.3 \u81ea\u52a8\u673a\u7684\u65f6\u5019\u5c31\u76f4\u63a5\u5199\u4e86\u4e2a<\/p>\n

\n

static const unsigned char default_zeros[EVP_MAX_MD_SIZE];<\/p>\n<\/blockquote>\n

\u6765\u66ff\u4ee3\u3002<\/p>\n

\u6d41\u7a0b\u5f53\u4e2d HKDF-Extract \u9876\u90e8\u7684\u6570\u636e\u5145\u5f53\u201c\u76d0\u201d\u7684\u89d2\u8272\uff0c\u5de6\u4fa7\u662f\u539f\u59cb\u5bc6\u94a5\u6750\u6599\uff08 IKM \uff09\uff0c\u5176\u8f93\u51fa\u7ed3\u679c\u4e3a\u884d\u751f\u51fa\u6765\u7684\u5bc6\u94a5\u3002\u6211\u4eec\u719f\u6089\u4e86 HKDF-Extract \u548c Derive-Secret \u4e4b\u540e\uff0c\u5c31\u4f1a\u53d1\u73b0 TLS1.3 \u4e2d\u662f\u7ed3\u5408\u4e86 HKDF-Extract \u548c HKDF-Expand \u4e00\u8d77\u8ba1\u7b97\u51fa\u6765\u5404\u79cd\u5bc6\u94a5\u7684\uff0c\u8fd9\u70b9\u6bd4 TLS1.2 \u66f4\u7b26\u5408 RFC \u7684\u8981\u6c42\uff0c\u66f4\u5b89\u5168\u3002<\/p>\n

\u8fd8\u6709\u4e00\u70b9\u503c\u5f97\u6ce8\u610f\uff0c\u6574\u4e2a\u5bc6\u94a5\u884d\u751f\u6d41\u7a0b\u662f\u4e0d\u53ef\u4ee5\u8df3\u8fc7\u4efb\u4f55\u4e00\u6b65\u7684\uff0c\u6bcf\u4e00\u6b65\u90fd\u5fc5\u987b\u8fdb\u884c\uff08\u8fd9\u91cc\u7684\u5fc5\u987b\u8fdb\u884c\u53ea\u9488\u5bf9\u9700\u8981\u7684\u6570\u636e\uff0c\u6bd4\u65b9\u8bf4\u4f60\u4e0d\u5f00\u590d\u7528\uff0c\u90a3\u4e48\u5c31\u6ca1\u5fc5\u8981\u8ba1\u7b97 PSK\uff0c\u590d\u7528\u4e3b\u5bc6\u94a5\u4e4b\u7c7b\u7684\uff09\u3002\u4e3e\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\uff0c\u5b8c\u6574\u63e1\u624b\u7684\u60c5\u51b5\u4e0b\uff0c\u4ecd\u7136\u9700\u8981\u8ba1\u7b97\u521d\u671f\u5bc6\u94a5\uff0c\u8ba1\u7b97\u7684\u65b9\u5f0f\u5c31\u662f HKDF-Extract(0, 0)\u3002<\/p>\n

\u6700\u540e\u4e00\u4e2a\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u6211\u4eec\u8ba1\u7b97\u51fa\u6765\u7684\u5bc6\u94a5\u5e76\u4e0d\u76f4\u63a5\u53c2\u4e0e\u5230\u4f1a\u8bdd \/\u63e1\u624b\u5f53\u4e2d\u53bb\uff0c\u662f\u8981\u7ecf\u8fc7\u4e00\u8bba\u6f14\u7b97\u7684\u3002\u4e5f\u5c31\u662f\u8bf4\u4ece secret \u5230 key \u662f\u6709\u4e00\u4e2a\u8fc7\u7a0b\u7684\uff0c\u4e3e\u4e2a\u4f8b\u5b50\u8bf4\uff0c\u5ba2\u6237\u7aef\u63e1\u624b\u5bc6\u94a5\uff08 client_handshake_traffic_secret \uff09\u8ba1\u7b97\u5230\u5ba2\u6237\u7aef\u4f1a\u8bdd key \u662f\u6709\u4e2a\u8fc7\u7a0b\u7684\uff0c\u5982\u4e0b\uff1a<\/p>\n

\n

client_handshake_write_key = HKDF-Expand-Label(client_handshake_traffic_secret, “key”, “”, key_length) client_handshake_write_iv = HKDF-Expand-Label(client_handshake_traffic_secret, “iv”, “”, iv_length)<\/p>\n<\/blockquote>\n

\u6211\u8fd9\u91cc\u4e4b\u6240\u4ee5\u5199 client_handshake_write_key \u7684\u65f6\u5019\u52a0\u4e86 write \u662f\u56e0\u4e3a\u5ba2\u6237\u7aef\u53d1\u9001\u63e1\u624b\u6d88\u606f\u4f7f\u7528\u7684 key \u548c\u5ba2\u6237\u7aef\u63a5\u53d7\u63e1\u624b\u6d88\u606f\uff08\u670d\u52a1\u7aef\u53d1\u9001\u63e1\u624b\u6d88\u606f\uff09\u7684 key \u662f\u4e0d\u4e00\u6837\u7684\u3002\u8fd9\u4e00\u70b9\u5728 TLS1.2 \u4e2d\u4e5f\u662f\u5982\u6b64\u3002<\/p>\n

PSK \u7684\u8ba1\u7b97\u8fc7\u7a0b<\/h3>\n

\u8fd9\u6b21\u53ea\u7b80\u5355\u5199\u5199 PSK \u7684\u8ba1\u7b97\u8fc7\u7a0b\uff0c\u590d\u7528\u65f6\u5982\u4f55\u8ba1\u7b97 binder value\uff0c\u6062\u590d\u4f1a\u8bdd\u7684\u64cd\u4f5c\u4ee5\u540e\u5355\u72ec\u5199\u3002 PSK \u7531\u590d\u7528\u4e3b\u5bc6\u94a5\uff08 resumption_master_secret \uff09\u8ba1\u7b97\u5f97\u51fa\uff0c\u516c\u5f0f\u5982\u4e0b\uff1a<\/p>\n

\n

PSK = HKDF-Expand-Label(resumption_master_secret,”resumption”, ticket_nonce, Hash.length)<\/p>\n<\/blockquote>\n

\u8fd9\u91cc\u590d\u7528\u4e3b\u5bc6\u94a5\u4e0d\u9700\u8981\u591a\u8bf4\uff0c\u800c ticket_nonce \u9700\u8981\u7b80\u5355\u8bf4\u8bf4\uff1aticket_nonce \u6bcf\u4e2a\u8fde\u63a5\u53ea\u6709\u4e00\u4e2a\uff0c\u5176\u503c\u5e94\u5f53\u6bcf\u4e2a\u90fd\u4e0d\u4e00\u6837\u3002ticket_nonce \u9700\u8981\u660e\u6587\u53d1\u7ed9\u5ba2\u6237\u7aef\uff0c\u8ba9\u5ba2\u6237\u7aef\u8ba1\u7b97\u51fa\u6765 PSK \u3002\u5305\u542b ticket_nonce \u7684\u62a5\u6587\u5c31\u662f new session ticket \u62a5\u6587\uff0c\u7b80\u5199\u4e3a NST \u62a5\u6587\u3002<\/p>\n

\u76f4\u63a5\u5bf9\u7167\u201c\u5bc6\u94a5\u884d\u751f\u6d41\u7a0b\u4e2d\u4e00\u4e9b\u8ba1\u7b97\u65b9\u6cd5\u201d\u5c31\u53ef\u4ee5\u6e05\u6670\u7684\u8ba1\u7b97\u51fa\u6765 PSK\uff0c\u5b9e\u9645\u4e0a\u4ece PSK \u5230 HMAC key\uff0c\u518d\u5230 binder key \u7684\u8ba1\u7b97\u8fc7\u7a0b\u975e\u5e38\u7b80\u5355\uff0c\u5b8c\u5168\u53ef\u4ee5\u4e00\u6b21\u7b97\u5b8c\u3002\u4e3a\u4e86\u8282\u7701\u590d\u7528\u65f6\u7684\u65f6\u95f4\uff0c\u53ef\u4ee5\u76f4\u63a5\u8ba1\u7b97\u5b58\u50a8 binder key \u3002\u4f46\u662f\u7531\u4e8e\u6d89\u53ca\u5230\u64cd\u4f5c\u90fd\u662f hmac\/hash\uff0c\u6240\u4ee5\u672c\u8d28\u4e0a\u65f6\u95f4\u51cf\u5c11\u7684\u5f88\u5c11\u3002\u8fd9\u4e1c\u897f\u6211\u7b2c\u4e00\u4e2a\u60f3\u51fa\u6765\u4ee5\u540e\u88ab\u6211\u53f8\u62ff\u53bb\u7533\u8bf7\u4e86\u4e13\u5229\uff0c\u8fd8\u7ed9\u4e86\u70b9\u5956\u91d1\u3002<\/p>\n

\u5bc6\u94a5\u884d\u751f\u4e2d\u7684\u4e00\u4e9b\u7ec6\u8282<\/h3>\n

\u8fd9\u91cc\u5199\u7684\u4e1c\u897f\u662f\u6211\u5f53\u521d\u8e29\u5230\u7684\u4e00\u4e9b\u5751\uff0c\u6709\u7684\u6211\u6ce8\u610f\u5230\u907f\u5f00\u4e86\uff0c\u6709\u7684\u6ca1\u6ce8\u610f\u5230\u8e29\u4e86\u8fdb\u53bb\u3002 1 \u8ba1\u7b97 HKDF-Extract \u548c HKDF-Extract \u65f6\uff0c\u9700\u8981\u6ce8\u610f\uff0c\u5bf9\u4e8e\u7a7a\u6d88\u606f\u7684 hash \u7ed3\u679c\u5e76\u4e0d\u4e3a\u7a7a\u3002\u5176\u7ed3\u679c\u65f6\u6709\u503c\u7684\u3002\u56e0\u4e3a\u5fd8\u4e86 hash \u8ba1\u7b97\u7684\u6d41\u7a0b\uff0c\u5c31\u5bb9\u6613\u8e29\u8fd9\u4e2a\u5751\u3002\u76ee\u524d tls1.3 \u7684 cipher \u53ea\u6709\u4e24\u79cd hash \u957f\u5ea6\u4e00\u4e2a\u662f sha384 \u7684 48,\u53e6\u4e00\u4e2a\u65f6 sha256 \u7684 32 \u3002\u76f4\u63a5\u628a\u5f53\u65f6\u5199\u7684\u7ed3\u679c\u8d34\u4e0a\u6765\u4e86\uff0c\u5404\u4f4d\u4e5f\u4e0d\u7528\u81ea\u5df1\u7b97\u4e86\u3002<\/p>\n

\n

uint8_t zero_sha384_hash[TLSV13_SHA384_HASH_LEN] = {0x38, 0xb0, 0x60, 0xa7,0x51, 0xac, 0x96, 0x38, 0x4c, 0xd9, 0x32, 0x7e,0xb1, 0xb1, 0xe3, 0x6a, 0x21, 0xfd, 0xb7, 0x11,0x14, 0xbe, 0x07, 0x43, 0x4c, 0x0c, 0xc7, 0xbf,0x63, 0xf6, 0xe1, 0xda, 0x27, 0x4e, 0xde, 0xbf,0xe7, 0x6f, 0x65, 0xfb, 0xd5, 0x1a, 0xd2, 0xf1,0x48, 0x98, 0xb9, 0x5b}; uint8_t zero_sha256_hash[TLSV13_SHA256_HASH_LEN] = {0xe3, 0xb0, 0xc4, 0x42,0x98, 0xfc, 0x1c, 0x14, 0x9a, 0xfb, 0xf4, 0xc8,0x99, 0x6f, 0xb9, 0x24, 0x27, 0xae, 0x41, 0xe4,0x64, 0x9b, 0x93, 0x4c, 0xa4, 0x95, 0x99, 0x1b,0x78, 0x52, 0xb8, 0x55};<\/p>\n<\/blockquote>\n

2 \u5bf9\u4e8e\u6bcf\u4e2a TLS1.3 \u7684\u8fde\u63a5\uff0c\u9700\u8981\u81ea\u5df1\u4fdd\u5b58 ticket_nonce \u3002\u8e29\u8fd9\u4e2a\u5751\u662f\u56e0\u4e3a\u5199\u7684\u81ea\u52a8\u673a\u65f6\u5f02\u6b65\uff0c\u8ba1\u7b97 PSK \u65f6\u5019\u7528\u7684 ticket_nonce \u548c\u5199 NST \u62a5\u6587\u7684\u65f6\u5019\u7684 ticket_nonce \u53ef\u80fd\u4f1a\u53d8\u5316\u3002\u56e0\u6b64\u9700\u8981\u6bcf\u4e2a\u8fde\u63a5\u81ea\u5df1\u4fdd\u5b58\u81ea\u5df1\u7684 ticket_nonce \u3002<\/p>\n

\u7ed3\u5c3e<\/h3>\n

\u5199\u5230\u8fd9\u91cc\u5dee\u4e0d\u591a\u5c31\u53ef\u4ee5\u7ed3\u675f\u4e86\uff0cTLS \u8fd9\u5757\u8fd8\u6709\u5565\u4e0d\u660e\u767d\u7684\u76f4\u63a5\u544a\u8bc9\u6211\u5c31\u6210\u4e86 \"TLS1.3<\/p>\n<\/p><\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (1<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : hxndg <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    HKDF-Expand \u548c HKDF-Extract \u7684\u6d41\u7a0b\u548c\u4ee3\u7801\u5df2\u7ecf\u5199\u4e86\u3002
    \u90a3\u4e48\u5bc6\u94a5\u884d\u751f\u7684\u6d41\u7a0b\u53ef\u4ee5\u8bf4\u662f\u5f7b\u5e95\u6ca1\u5565\u96be\u5ea6\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"

    TLS1.3 \u5bc6\u94a5\u884d\u751f\u8ba1\u7b97\u65b9\u6cd5\u548c\u529f…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/149574"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=149574"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/149574\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=149574"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=149574"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=149574"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}