mbedtls/ChangeLog.d/remove_allow_sha1_in_certificates
Mateusz Starzyk bf4c4f9cd5 Reword changelog entry for removal of SHA-1
from the default TLS configuration.

Signed-off-by: Mateusz Starzyk <mateusz.starzyk@mobica.com>
2021-04-16 18:39:10 +02:00

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Removals
* Remove the MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_CERTIFICATES
compile-time option, which was off by default. Users should not trust
certificates signed with SHA-1 due to the known attacks against SHA-1.
If needed, SHA-1 cerificate can still be used by providing custom
verification profile to mbedtls_x509_crt_verify_with_profile function
in x509_crt.h, or mbedtls_ssl_conf_cert_profile function in ssl.h.
Example of custom verification profile, supporting SHA-1:
const mbedtls_x509_crt_profile mbedtls_x509_crt_custom = {
MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA1 ),
0xFFFFFFF, /* Any PK alg */
0xFFFFFFF, /* Any curve */
2048
};