feat(ncm): 网易云技术栈预研+构建验证 (agent-200) — 选型: mbedtls3.6.2裁剪(TLS+AES+MD5+RSA raw+Base64,~388KB)/jsmn(2.2KB)/qrcodegen(10.8KB)/minimp3(37.4KB), 合计~438KB; HTTPS unikey 全链路宿主+qemu-mipsel 实测通过; RSA raw 与 Python pow 逐字节一致; MP3 解码非瓶颈
vendor源码+out产物不入库(126MB, gitignore; 版本/许可/裁剪见 VENDOR_NOTES.md, build_*.sh 可复现)
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/* https_unikey.c — 网易云 eapi 二维码 unikey 最小 HTTPS 实测 demo
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* 目标端: POST https://interface.music.163.com/eapi/login/qrcode/unikey {type:3}
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* 用途: 技术栈预研 — 验证 mbedtls(TLS1.2) + AES-128-ECB + MD5 + Base64(无需) + jsmn 在宿主/MIPS 均可用。
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* eapi 加密(参考 CNMPlayer ncm-api-rs crypto::eapi):
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* digest = md5("nobody" + url + "use" + json + "md5forencrypt") // url="/api/login/qrcode/unikey"
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* plain = url + "-36cd479b6b5-" + json + "-36cd479b6b5-" + digest
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* params = HEX_UPPER(AES128_ECB(plain, EAPI_KEY)) // EAPI_KEY="e82ckenh8dichen8"
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* HTTP POST body = "params=" + params ; Cookie 头为 eapi header map(urlencoded 拼接)。
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* 编译(宿主): gcc -O2 -Ivendor/mbedtls/include -Ivendor/jsmn demo/https_unikey.c \
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* vendor/mbedtls/library/libmbedtls.a vendor/mbedtls/library/libmbedx509.a \
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* vendor/mbedtls/library/libmbedcrypto.a -o demo/https_unikey
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* 编译(MIPS): .tools/zig-mipsel-cc -O2 -static ... (见 build_demo.sh)
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include "mbedtls/net_sockets.h"
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#include "mbedtls/ssl.h"
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#include "mbedtls/x509_crt.h"
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#include "mbedtls/md.h"
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#include "mbedtls/aes.h"
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#include "mbedtls/error.h"
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#include "jsmn.h"
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#define EAPI_KEY "e82ckenh8dichen8"
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#define EAPI_URL "/api/login/qrcode/unikey"
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#define HTTP_URL "/eapi/login/qrcode/unikey"
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#define HOST "interface.music.163.com"
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#define UA_EAPI "NeteaseMusic 9.0.90/5038 (iPhone; iOS 16.2; zh_CN)"
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#define SEP "-36cd479b6b5-"
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/* ---------- 实用: 十六进制 ---------- */
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static void hex_lower(const unsigned char *in, size_t n, char *out) {
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static const char d[] = "0123456789abcdef";
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for (size_t i = 0; i < n; i++) { out[i*2] = d[in[i]>>4]; out[i*2+1] = d[in[i]&15]; }
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out[n*2] = 0;
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}
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static void hex_upper(const unsigned char *in, size_t n, char *out) {
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static const char d[] = "0123456789ABCDEF";
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for (size_t i = 0; i < n; i++) { out[i*2] = d[in[i]>>4]; out[i*2+1] = d[in[i]&15]; }
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out[n*2] = 0;
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}
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/* ---------- MD5 (mbedtls_md) ---------- */
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static void md5_hex(const char *msg, char *out_digest_hex /*33*/) {
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unsigned char d[16];
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const mbedtls_md_info_t *inf = mbedtls_md_info_from_type(MBEDTLS_MD_MD5);
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mbedtls_md(inf, (const unsigned char*)msg, strlen(msg), d);
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hex_lower(d, 16, out_digest_hex);
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}
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/* ---------- AES-128-ECB + PKCS7 → 大写 Hex ---------- */
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static void aes_ecb_hex(const char *plain, char *out /*hex*/) {
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size_t n = strlen(plain);
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int pad = 16 - (int)(n % 16);
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size_t total = n + pad;
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unsigned char buf[512], key[16], enc[512];
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memcpy(buf, plain, n);
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for (int i = 0; i < pad; i++) buf[n + i] = (unsigned char)pad;
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mbedtls_aes_context aes; mbedtls_aes_init(&aes);
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mbedtls_aes_setkey_enc(&aes, (const unsigned char*)EAPI_KEY, 128);
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for (size_t off = 0; off < total; off += 16)
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mbedtls_aes_crypt_ecb(&aes, MBEDTLS_AES_ENCRYPT, &buf[off], &enc[off]);
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mbedtls_aes_free(&aes);
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hex_upper(enc, total, out);
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}
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/* ---------- 生成 52 hex deviceId(演示用，可被环境变量覆盖) ---------- */
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static void make_device_id(char *out) {
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const char *env = getenv("NCM_DEVICE_ID");
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if (env && strlen(env) == 52) { strcpy(out, env); return; }
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unsigned char r[26]; FILE *f = fopen("/dev/urandom","rb");
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if (f) { size_t got = fread(r,1,26,f); fclose(f); if (got==26){ hex_upper(r,26,out); return; } }
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/* fallback 固定值 */
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strcpy(out, "0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF");
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}
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/* ---------- 自定义 RNG (读取 /dev/urandom) ---------- */
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static FILE *rng_fp = NULL;
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static int my_rng(void *arg, unsigned char *out, size_t len) {
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(void)arg;
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if (!rng_fp) rng_fp = fopen("/dev/urandom","rb");
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if (!rng_fp) return -1;
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return fread(out,1,len,rng_fp) == len ? 0 : -1;
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}
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/* ---------- eapi 请求体构造 ---------- */
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static void build_eapi(const char *device_id, char *body_out /* "params=..."; 尺寸给足 */,
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char *cookie_out, size_t cookie_sz) {
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char ts[32]; sprintf(ts, "%lld", (long long)time(NULL));
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char ms[32]; struct timespec tv; clock_gettime(CLOCK_REALTIME,&tv);
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sprintf(ms, "%lld", (long long)tv.tv_sec*1000 + tv.tv_nsec/1000000);
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char buildver[16]; memcpy(buildver, ts, 10); buildver[10]=0;
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char request_id[48]; sprintf(request_id, "%s_0000", ms);
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/* header map (eapi header cookie & json.header 共用同一组键值) */
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const char *osver = "Microsoft-Windows-10-Professional-build-19045-64bit";
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const char *appver = "3.1.17.204416";
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const char *os = "pc", *channel = "netease";
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const char *resolution = "1920x1080", *versioncode = "140", *mobilename = "";
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/* Cookie 头 (k=v 用 '; ' 拼接，值不做 urlencode，与 §7 实测一致) */
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snprintf(cookie_out, cookie_sz,
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"__csrf=;appver=%s;buildver=%s;channel=%s;deviceId=%s;mobilename=%s;os=%s;osver=%s;requestId=%s;resolution=%s;versioncode=%s",
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appver, buildver, channel, device_id, mobilename, os, osver, request_id, resolution, versioncode);
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/* json 明文 (key 顺序: type, header, e_r；header 内顺序无关紧要，服务端做 JSON 解析) */
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char json[1024];
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snprintf(json, sizeof json,
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"{\"type\":3,\"header\":{\"__csrf\":\"\",\"appver\":\"%s\",\"buildver\":\"%s\",\"channel\":\"%s\","
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"\"deviceId\":\"%s\",\"mobilename\":\"%s\",\"os\":\"%s\",\"osver\":\"%s\",\"requestId\":\"%s\","
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"\"resolution\":\"%s\",\"versioncode\":\"%s\"},\"e_r\":false}",
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appver, buildver, channel, device_id, mobilename, os, osver, request_id, resolution, versioncode);
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/* eapi 签名 */
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char msg[1400];
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snprintf(msg, sizeof msg, "nobody%suse%smd5forencrypt", EAPI_URL, json);
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char digest[33]; md5_hex(msg, digest);
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char plain[1600];
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snprintf(plain, sizeof plain, "%s%s%s%s%s", EAPI_URL, SEP, json, SEP, digest);
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char params[1200];
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aes_ecb_hex(plain, params);
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snprintf(body_out, 1300, "params=%s", params);
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}
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/* ---------- jsmn 取 "unikey" 字符串值 ---------- */
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static int jsmn_get_str(const char *json, const char *key, char *val, size_t vsz) {
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jsmn_parser p; jsmn_init(&p);
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int n = jsmn_parse(&p, json, strlen(json), NULL, 0);
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if (n <= 0) return -1;
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jsmntok_t *tok = malloc(sizeof(jsmntok_t)*(size_t)n);
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if (!tok) return -1;
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jsmn_init(&p);
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if (jsmn_parse(&p, json, strlen(json), tok, n) < 0) { free(tok); return -1; }
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int rc = -1;
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for (int i = 0; i < n - 1; i++) {
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if (tok[i].type == JSMN_STRING &&
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(int)(tok[i].end - tok[i].start) == (int)strlen(key) &&
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strncmp(json + tok[i].start, key, tok[i].end - tok[i].start) == 0) {
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jsmntok_t *v = &tok[i+1];
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if (v->type == JSMN_STRING) {
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size_t len = v->end - v->start;
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if (len < vsz) { memcpy(val, json + v->start, len); val[len] = 0; rc = 0; }
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}
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break;
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}
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}
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free(tok); return rc;
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}
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/* ---------- TLS POST (mbedtls) ---------- */
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static int tls_post(const char *host, const char *path, const char *cookie,
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const char *body, char *resp, size_t resp_sz) {
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int ret;
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mbedtls_net_context net; mbedtls_net_init(&net);
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mbedtls_ssl_context ssl; mbedtls_ssl_init(&ssl);
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mbedtls_ssl_config conf; mbedtls_ssl_config_init(&conf);
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mbedtls_x509_crt cacert; mbedtls_x509_crt_init(&cacert);
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/* 载入 CA 根(宿主/system 路径; 设备侧请内置 CA bundle) */
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const char *ca_paths[] = {
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"/etc/ssl/certs/ca-certificates.crt",
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"/etc/ssl/certs/ca-bundle.crt",
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"/etc/pki/tls/certs/ca-bundle.crt",
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NULL
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};
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int ca_ok = 0;
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for (int i = 0; ca_paths[i]; i++)
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if (mbedtls_x509_crt_parse_file(&cacert, ca_paths[i]) == 0) { ca_ok = 1; break; }
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if (!ca_ok) { fprintf(stderr, "[!] no CA bundle loaded\n"); ret = -100; goto out; }
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if ((ret = mbedtls_net_connect(&net, host, "443", MBEDTLS_NET_PROTO_TCP)) != 0) {
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fprintf(stderr, "[!] connect: -0x%04x\n", (unsigned)-ret); goto out;
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}
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if ((ret = mbedtls_ssl_config_defaults(&conf, MBEDTLS_SSL_IS_CLIENT,
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MBEDTLS_SSL_TRANSPORT_STREAM, MBEDTLS_SSL_PRESET_DEFAULT)) != 0) goto out;
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mbedtls_ssl_conf_authmode(&conf, MBEDTLS_SSL_VERIFY_REQUIRED);
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mbedtls_ssl_conf_ca_chain(&conf, &cacert, NULL);
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mbedtls_ssl_conf_rng(&conf, my_rng, NULL);
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if ((ret = mbedtls_ssl_setup(&ssl, &conf)) != 0) goto out;
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if ((ret = mbedtls_ssl_set_hostname(&ssl, host)) != 0) goto out;
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mbedtls_ssl_set_bio(&ssl, &net, mbedtls_net_send, mbedtls_net_recv, NULL);
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while ((ret = mbedtls_ssl_handshake(&ssl)) != 0) {
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if (ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE) {
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fprintf(stderr, "[!] handshake: -0x%04x\n", (unsigned)-ret); goto out;
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}
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}
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char req[2048];
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int rlen = snprintf(req, sizeof req,
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"POST %s HTTP/1.1\r\nHost: %s\r\nUser-Agent: %s\r\n"
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"Content-Type: application/x-www-form-urlencoded\r\n"
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"Cookie: %s\r\nConnection: close\r\nContent-Length: %zu\r\n\r\n%s",
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path, host, UA_EAPI, cookie, strlen(body), body);
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size_t off = 0;
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while (off < (size_t)rlen) {
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ret = mbedtls_ssl_write(&ssl, (const unsigned char*)req + off, (size_t)rlen - off);
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if (ret < 0) {
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if (ret == MBEDTLS_ERR_SSL_WANT_READ || ret == MBEDTLS_ERR_SSL_WANT_WRITE) { continue; }
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fprintf(stderr, "[!] ssl_write: -0x%04x\n", (unsigned)-ret); goto out;
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}
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off += (size_t)ret;
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}
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size_t total = 0; memset(resp, 0, resp_sz);
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for (;;) {
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ret = mbedtls_ssl_read(&ssl, (unsigned char*)resp + total, resp_sz - 1 - total);
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if (ret == 0) break; /* 对端关闭 */
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if (ret < 0) {
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if (ret == MBEDTLS_ERR_SSL_WANT_READ || ret == MBEDTLS_ERR_SSL_WANT_WRITE) continue;
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if (ret == MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY) break;
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fprintf(stderr, "[!] ssl_read: -0x%04x\n", (unsigned)-ret); goto out;
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}
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total += (size_t)ret;
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if (total >= resp_sz - 1) break;
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}
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ret = (int)total;
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out:
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mbedtls_net_free(&net); mbedtls_ssl_free(&ssl); mbedtls_ssl_config_free(&conf);
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mbedtls_x509_crt_free(&cacert);
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if (rng_fp) { fclose(rng_fp); rng_fp = NULL; }
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return ret;
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}
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int main(void) {
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char device_id[64]; make_device_id(device_id);
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/* 演示用随机 deviceId(实际应持久化，风控要求稳定) */
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printf("deviceId=%s\n", device_id);
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char body[1300], cookie[512];
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build_eapi(device_id, body, cookie, sizeof cookie);
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char resp[8192];
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int n = tls_post(HOST, HTTP_URL, cookie, body, resp, sizeof resp);
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if (n < 0) {
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char eb[128]; mbedtls_strerror(n, eb, sizeof eb);
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fprintf(stderr, "HTTP request failed: %d (%s)\n", n, eb);
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return 1;
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}
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resp[n] = 0;
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/* 剥掉 HTTP 头 */
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char *pbody = strstr(resp, "\r\n\r\n");
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pbody = pbody ? pbody + 4 : resp;
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printf("---- response body ----\n%.*s\n", (int)strlen(pbody), pbody);
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char unikey[64] = {0};
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if (jsmn_get_str(pbody, "unikey", unikey, sizeof unikey) == 0)
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printf("UNIKEY = %s\n", unikey); /* ← 拿到即成功 */
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else
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printf("UNIKEY not found\n");
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return jsmn_get_str(pbody, "unikey", unikey, sizeof unikey) == 0 ? 0 : 2;
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}
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