SChannel: Support SCH_USE_STRONG_CRYPTO #6734
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fixup: Match format preferences for
xim
commented
Mar 12, 2021
lib/vtls/schannel.c
Outdated
| @@ -335,6 +335,11 @@ set_ssl_ciphers(SCHANNEL_CRED *schannel_cred, char *ciphers) | |||
| alg = get_alg_id_by_name(startCur); | |||
| if(alg) | |||
| algIds[algCount++] = alg; | |||
| #ifdef SCH_USE_STRONG_CRYPTO | |||
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Checks revealed that old toolchains don't provide SCH_USE_STRONG_CRYPTO. Is it better to do this, or should I rather do
#ifndef SCH_USE_STRONG_CRYPTO
#define SCH_USE_STRONG_CRYPTO 0x00400000
#endif
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should I rather do
#ifndef SCH_USE_STRONG_CRYPTO #define SCH_USE_STRONG_CRYPTO 0x00400000 #endif
yes
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I'm happy with the patch as is, and all test failures appeared to be unrelated. Just tell me if further actions are required. |
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It looks fine, it will be added next feature window. Ignore the test failures that's an unrelated issue. |
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Thanks. I just landed a slightly modified version, it documents SCH_USE_STRONG_CRYPTO instead of USE_STRONG_CRYPTO but both are accepted. I did this for consistency because the other schannel cipher options use OS symbols, eg CALG_ECDH_EPHEM. |
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Feature was discussed on curl-library@cool.haxx.se;
Subject: Adding flags to SChannel cred.I wasn't sure about where, and to what extent, this should be documented.
Also note that I tested this by compiling curl.exe on the latest preview on windows 10. Downloading https://clienttest.ssllabs.com:8443/ssltest/viewMyClient.html with and without
--ciphers USE_STRONG_CRYPTOand diffing the results shows that 3des is correctly disabled.