I have an application that I use for work all the time that makes a web request to a server and responds with a unique key that I need for certain purposes. I don't like having to launch the application whenever I want a key, so I am using proxifier to forward the traffic to fiddler. I've tried it on two machines with out success. One machine uses windows 7 without .net 4 so I'm using fiddler2. On that machine the error is
. System.Security.Authentication.AuthenticationException A call to SSPI failed, see inner exception. < The message received was unexpected or badly formatted
The other machine uses fiddler 4 and the error is
fiddler.network.https> HTTPS handshake to 104.28.15.252 (for #1) failed. System.Security.Authentication.AuthenticationException A call to SSPI failed, see inner exception. < The message received was unexpected or badly formatted
Win32 (SChannel) Native Error Code: 0x80090326
In both cases the request it fails on is the same
A SSLv3-compatible ClientHello handshake was found. Fiddler extracted the parameters below.
Version: 3.1 (TLS/1.0)
Random: 59 C1 92 62 E9 FA 23 04 AB 6F FE A4 10 7B 27 13 28 7B 49 59 5A 9A AB D8 F1 FA 39 71 37 86 00 37
"Time": 5/28/2022 5:42:01 PM
SessionID: empty
Extensions:
none
Ciphers:
[0035]TLS_RSA_AES_256_SHA
[002F]TLS_RSA_AES_128_SHA
[000A]SSL_RSA_WITH_3DES_EDE_SHA
[0005]SSL_RSA_WITH_RC4_128_SHA
[0004]SSL_RSA_WITH_RC4_128_MD5
Compression:
[00]NO_COMPRESSION
1 Answer, 1 is accepted
In order your application to work properly it has to trust Fiddler's root certificate. Usually this can be done by adding it to Windows' certificate store. Did you trust Fiddler's root certificate?
Regards,
Alexander
Progress Telerik