Authentication with HMAC-SHA1-80 (truncated to 80bits).ħ. Authentication Key is same size as AES key.Ħ. AES 256 = 32 + 32 + 2 = 66 bytes of key materialĥ. AES 192 = 24 + 24 + 2 = 50 bytes of key materialĬ. AES 128 = 16 + 16 + 2 = 34 bytes of key materialī. Master key len = AESKeyLen + AuthKeyLen + PWVLen:Ī. Following salt lengths are used w/ password during keygen:Ĥ.
Last 2 bytes is the password verification value.ģ. Next n bytes is for the authentication keyĬ. First m bytes is for the encryption keyī. Generates a master key broken into the following:Ī. Key generation with PBKDF2-HMAC-SHA1 (1000 iteration count) that Encryption-Decryption w/ AES-CTR (128, 192, or 256 bits)Ģ. _, err = io.Copy(w, bytes.NewReader(contents))ġ. W, err := zipw.Encrypt(`test.txt`, `golang`) zipĢ.zip -> decrypted -> decompressed -> hello.txt Mentioned in the original PKWARE spec (sections 6.0 and 7.0): This package DOES NOT intend to implement the encryption methods This is a fork of the Go archive/zip package to add supportįor reading/writing password protected.
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