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Caravel Forum : Caravel Boards : The Site : Caravelnet activation purchase does not work because of SSL error on redirect to BTMicro
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kikuchiyo
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icon Caravelnet activation purchase does not work because of SSL error on redirect to BTMicro (+2)  
I wanted to purchase the yearly renewal of my Caravelnet membership, but I couldn't: when I click on the "Buy now" link, I get redirected to the payment site, but the browser doesn't let me continue, displaying the following notification:

Secure Connection Failed

An error occurred during a connection to secure.bmtmicro.com. Unsupported hash algorithm used by TLS peer.

Error code: SSL_ERROR_UNSUPPORTED_HASH_ALGORITHM

    The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
    Please contact the website owners to inform them of this problem.


Can you please notify their sysadmin, and ask them to drag their SSL setup to the 21st century?

(I'm trying from Firefox under Linux, but I think any up-to-date, modern browser will respond with a similar error message.)
09-13-2021 at 07:18 PM
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Tuttle
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icon Re: Caravelnet activation purchase does not work because of SSL error on redirect to BTMicro (+2)  
I'm leaning towards either a glitch they've already fixed, or something more local to your setup/network/ISP. Works fine for me in Firefox 92 for Windows, and https://www.ssllabs.com/ssltest/analyze.html?d=secure.bmtmicro.com shows fairly modern crypto without any support for legacy stuff.
09-14-2021 at 12:25 AM
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kikuchiyo
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icon Re: Caravelnet activation purchase does not work because of SSL error on redirect to BTMicro (+3)  
It turns out that the flavor of linux matters: Fedora, which I'm using, has recently made their system-wide crypto policies more strict. As a result, some sites appear broken, no matter the browser.

I'm not quite sure what part of BTMicro's setup was found wanting, but a potential workaround is to temporarily weaken the system crypto policy:
sudo update-crypto-policies --set DEFAULT:FEDORA32

Then restart the browser, do your stuff, then
sudo update-crypto-policies --set DEFAULT

when done.
09-14-2021 at 06:47 PM
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mrimer
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icon Re: Caravelnet activation purchase does not work because of SSL error on redirect to BTMicro (+1)  
Wow, good to know. I'm all for having secure crypto, especially with our payment processors. Meanwhile, I appreciate you posting a workaround.

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09-21-2021 at 04:06 PM
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