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#62732 Fix password validation in PasswordHasher`1: add bound check for salt size before array allocation #62734

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Merged
merged 3 commits into from
Jul 18, 2025
+4 −2
Merged

#62732 Fix password validation in PasswordHasher`1: add bound check for salt size before array allocation #62734

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a6489b1
#62732 Fix password validation in PasswordHasher`1: add check for upp…
navferty Jul 15, 2025
04f08b3
Add test cases for password hash verification
navferty Jul 17, 2025
edc2fe3
Change salt extraction from hashed data using AsSpan, add test case f…
navferty Jul 17, 2025
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3 changes: 1 addition & 2 deletions src/Identity/Extensions.Core/src/PasswordHasher.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -264,8 +264,7 @@ private static bool VerifyHashedPasswordV3(byte[] hashedPassword, string passwor
{
return false;
}
byte[] salt = new byte[saltLength];
Buffer.BlockCopy(hashedPassword, 13, salt, 0, salt.Length);
byte[] salt = hashedPassword.AsSpan(13, saltLength).ToArray();

// Read the subkey (the rest of the payload): must be >= 128 bits
int subkeyLength = hashedPassword.Length - 13 - salt.Length;
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3 changes: 3 additions & 0 deletions src/Identity/test/Identity.Test/PasswordHasherTest.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -112,6 +112,9 @@ public void HashPassword_Version3()
[InlineData("AQAAAAAAAAD6AAAAEAhftMyfTJyAAAAAAAAAAAAAAAAAAAih5WsjXaR3PA9M")] // incorrect password
[InlineData("AQAAAAIAAAAyAAAAEOMwvh3+FZxqkdMBz2ekgGhwQ4A=")] // too short
[InlineData("AQAAAAIAAAAyAAAAEOMwvh3+FZxqkdMBz2ekgGhwQ4B6pZWND6zgESBuWiHwAAAAAAAAAAAA")] // extra data at end
[InlineData("AQAAAAIAAYagAP///wABAgMEBQYHCAkKCwwNDg/Q8A0WMKbtHQJQ2DHCdoEeeFBrgNlldq6vH4qX/CGqGQ==")] // salt length greater than data length
[InlineData("AQAAAAEAACcQf////4r8+J3NDEnMWKlHbhJQ6N5oooZ7hUi3cr/qAjd7Lc1Sv6GhorP7Ly0AzCv9PAmKww==")] // salt length is Int32.MaxValue
[InlineData("AQAAAAIAAYagAAAACAABAgMEBQYH4qLSh7iNSI12qySxAkyR0XgpXpvNiwqhBJFNLbJKKFw=")] // salt length (8 bytes) less than minimum allowed
public void VerifyHashedPassword_FailureCases(string hashedPassword)
{
// Arrange
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