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Check server certificate fingerprint - proof of concept

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M66B
2019-12-15 19:26:01 +01:00
parent 326788a711
commit 0bf59f64a9
2 changed files with 106 additions and 4 deletions
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10
app/src/main/java/eu/faircode/email/Helper.java
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@@ -628,8 +628,16 @@ public class Helper {
return sha256(data.getBytes());
}
static String sha1(byte[] data) throws NoSuchAlgorithmException {
return sha("SHA-1", data);
}
static String sha256(byte[] data) throws NoSuchAlgorithmException {
byte[] bytes = MessageDigest.getInstance("SHA-256").digest(data);
return sha("SHA-256", data);
}
static String sha(String digest, byte[] data) throws NoSuchAlgorithmException {
byte[] bytes = MessageDigest.getInstance(digest).digest(data);
StringBuilder sb = new StringBuilder();
for (byte b : bytes)
sb.append(String.format("%02x", b));