3 files changed, 20 insertions, 4 deletions

diff --git a/client/package.json b/client/package.json
index 152f8445f..5147ca86c 100644
--- a/client/package.json
+++ b/client/package.json
@@ -63,6 +63,7 @@
     "@types/markdown-it": "^10.0.1",
     "@types/node": "^14.0.14",
     "@types/sanitize-html": "1.23.3",
+    "@types/sha.js": "^2.4.0",
     "@types/socket.io-client": "^1.4.32",
     "@types/video.js": "^7.3.8",
     "@types/webtorrent": "^0.107.0",
@@ -110,6 +111,7 @@
     "sass-lint": "^1.13.1",
     "sass-loader": "8.0.2",
     "sass-resources-loader": "^2.0.0",
+    "sha.js": "^2.4.11",
     "socket.io-client": "^2.2.0",
     "stream-browserify": "^3.0.0",
     "stream-http": "^3.0.0",
diff --git a/client/src/assets/player/p2p-media-loader/segment-validator.ts b/client/src/assets/player/p2p-media-loader/segment-validator.ts
index 0614f73d2..fa6e6df1d 100644
--- a/client/src/assets/player/p2p-media-loader/segment-validator.ts
+++ b/client/src/assets/player/p2p-media-loader/segment-validator.ts
@@ -41,7 +41,7 @@ function segmentValidatorFactory (segmentsSha256Url: string) {
       throw new Error(`Unknown segment name ${filename}/${range} in segment validator`)
     }
 
-    const calculatedSha = bufferToEx(await sha256(segment.data))
+    const calculatedSha = await sha256Hex(segment.data)
     if (calculatedSha !== hashShouldBe) {
       throw new Error(
         `Hashes does not correspond for segment ${filename}/${range}` +
@@ -68,14 +68,21 @@ function fetchSha256Segments (url: string) {
     })
 }
 
-function sha256 (data?: ArrayBuffer) {
+async function sha256Hex (data?: ArrayBuffer) {
   if (!data) return undefined
 
-  return window.crypto.subtle.digest('SHA-256', data)
+  if (window.crypto.subtle) {
+    return window.crypto.subtle.digest('SHA-256', data)
+      .then(data => bufferToHex(data))
+  }
+
+  // Fallback for non HTTPS context
+  const shaModule = await import('sha.js')
+  return new shaModule.sha256().update(Buffer.from(data)).digest('hex')
 }
 
 // Thanks: https://stackoverflow.com/a/53307879
-function bufferToEx (buffer?: ArrayBuffer) {
+function bufferToHex (buffer?: ArrayBuffer) {
   if (!buffer) return ''
 
   let s = ''
diff --git a/client/yarn.lock b/client/yarn.lock
index d3603a4a9..0efcabe8c 100644
--- a/client/yarn.lock
+++ b/client/yarn.lock
@@ -1495,6 +1495,13 @@
   resolved "https://registry.yarnpkg.com/@types/selenium-webdriver/-/selenium-webdriver-3.0.17.tgz#50bea0c3c2acc31c959c5b1e747798b3b3d06d4b"
   integrity sha512-tGomyEuzSC1H28y2zlW6XPCaDaXFaD6soTdb4GNdmte2qfHtrKqhy0ZFs4r/1hpazCfEZqeTSRLvSasmEx89uw==
 
+"@types/sha.js@^2.4.0":
+  version "2.4.0"
+  resolved "https://registry.yarnpkg.com/@types/sha.js/-/sha.js-2.4.0.tgz#bce682ef860b40f419d024fa08600c3b8d24bb01"
+  integrity sha512-amxKgPy6WJTKuw8mpUwjX2BSxuBtBmZfRwIUDIuPJKNwGN8CWDli8JTg5ONTWOtcTkHIstvT7oAhhYXqEjStHQ==
+  dependencies:
+    "@types/node" "*"
+
 "@types/simple-peer@*":
   version "9.6.0"
   resolved "https://registry.yarnpkg.com/@types/simple-peer/-/simple-peer-9.6.0.tgz#b5828d835b7f42dde27db584ba127e7a9f9072f4"