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Upgrade the default X.509 profile to the former "next" profile

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Upgrade the default X.509 certificate verification profile
mbedtls_x509_crt_profile_default to the former value of
mbedtls_x509_crt_profile_next, which is hashes and curves with at least 255
bits (Curve25519 included), and RSA 2048 and above.

Document more precisely what goes into the default profile.

Keep the "next" profile unchanged for now.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine 2021-06-02 00:03:26 +02:00
parent 532327b429
commit ffb92da622
2 changed files with 18 additions and 19 deletions
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12
include/mbedtls/x509_crt.h
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@ -332,12 +332,22 @@ typedef void mbedtls_x509_crt_restart_ctx;
/**
* Default security profile. Should provide a good balance between security
* and compatibility with current deployments.
*
* This profile permits:
* - SHA2 hashes with at least 256 bits: SHA-256, SHA-384, SHA-512.
* - Elliptic curves with 255 bits and above.
* - RSA with 2048 bits and above.
*
* New minor versions of Mbed TLS may extend this profile, for example if
* new curves are added to the library. New minor versions of Mbed TLS will
* not reduce this profile unless serious security concerns require it.
*/
extern const mbedtls_x509_crt_profile mbedtls_x509_crt_profile_default;
/**
* Expected next default profile. Recommended for new deployments.
* Currently targets a 128-bit security level, except for RSA-2048.
* Currently targets a 128-bit security level, except for allowing RSA-2048.
* This profile may change at any time.
*/
extern const mbedtls_x509_crt_profile mbedtls_x509_crt_profile_next;