Authentication error return by srtp_unprotect for AES CM 256 HMAC SHA1 80 about libsrtp HOT 4 CLOSED

aes256_decode.log
aes128_decode.log

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hi @Steven1240, I could reproduce the error with the data you provided but if I did the same test on a pcap that I created then it manages to decode fine.
srtp_aes_256.zip
./rtp_decoder -a -o 42 -t 10 -e 256 -k f0f04914b513f2763a1b1fa130f10e2998f6f6e43e4309d1e622a0e332b9f1b63b04803de51ee7c96423ab5b78d2 -d srtp < srtp_aes_256.pcap

Are you sure the key is correct ? If you can create a complete example that shows the problem, or at least include the original pliantext, I could look some more. What version of libsrtp was used to encrypt the data ?

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Hi @pabuhler

some error exists in master key or master salt data.
re-generate aes256 and key/salt data and re-invoke rtp_decoder, and get no error. The previous error caused from the incorrect key/salt.
p3p_aes256.srtp.pcap.zip

Thanks for you support.

./rtp_decoder -a -o 46 -t 10 -e 256 -k 72A8B2209A62DC3410301A78BE3D9A57CD9271E07FC62D12E4A1BC6B52EECAE95810C7F77EDB2670ED48D408984B < p3p_aes256.srtp.pcap

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ok, I will close this then

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