/usr/share/crypto-policies/policies/ Current File: //usr/share/crypto-policies/policies/LEGACY.pol
# Provides settings for ensuring maximum compatibility with legacy systems.
# This policy is less secure and intended to be a easy way to switch system
# to be compatible with older systems.
# It should provide at least 64-bit security and include RC4 and 3DES.

# MACs: all HMAC with SHA1 or better + all modern MACs (Poly1305 etc)
# Curves: all prime >= 255 bits (including Bernstein curves)
# Signature algorithms: with SHA-1 hash or better (DSA allowed)
# TLS Ciphers: all available > 112-bit key, >= 128-bit block (including RC4 and 3DES)
# non-TLS Ciphers: as TLS Ciphers with added Camellia
# key exchange: ECDHE, RSA, DHE
# DH params size: >= 1023
# RSA params size: >= 1023
# DSA params size: >= 1023
# TLS protocols: TLS >= 1.0 DTLS >= 1.0

mac = AEAD HMAC-SHA2-256 HMAC-SHA1 UMAC-128 HMAC-SHA2-384 HMAC-SHA2-512
mac@Kerberos = HMAC-SHA2-384 HMAC-SHA2-256 AEAD UMAC-128 HMAC-SHA2-512 HMAC-SHA1

group = X25519 X448 SECP256R1 SECP384R1 SECP521R1 \
    FFDHE-2048 FFDHE-3072 FFDHE-4096 FFDHE-6144 FFDHE-8192 FFDHE-1536

group@SSH = FFDHE-1024+

hash = SHA2-256 SHA2-384 SHA2-512 SHA3-256 SHA3-384 SHA3-512 SHA2-224 SHA1

sign = ECDSA-SHA3-256 ECDSA-SHA2-256 \
       ECDSA-SHA3-384 ECDSA-SHA2-384 \
       ECDSA-SHA3-512 ECDSA-SHA2-512 \
       EDDSA-ED25519 EDDSA-ED448 \
       RSA-PSS-SHA2-256 RSA-PSS-SHA2-384 RSA-PSS-SHA2-512 \
       RSA-SHA3-256 RSA-SHA2-256 \
       RSA-SHA3-384 RSA-SHA2-384 \
       RSA-SHA3-512 RSA-SHA2-512 \
       ECDSA-SHA2-224 RSA-PSS-SHA2-224 RSA-SHA2-224 \
       DSA-SHA2-256 DSA-SHA2-384 DSA-SHA2-512 DSA-SHA2-224 \
       DSA-SHA3-256 DSA-SHA3-384 DSA-SHA3-512 \
       ECDSA-SHA1 RSA-PSS-SHA1 RSA-SHA1 DSA-SHA1

cipher = AES-256-GCM AES-256-CCM CHACHA20-POLY1305 CAMELLIA-256-GCM \
    AES-256-CTR AES-256-CBC CAMELLIA-256-CBC AES-128-GCM AES-128-CCM \
    CAMELLIA-128-GCM AES-128-CTR AES-128-CBC CAMELLIA-128-CBC \
    3DES-CBC RC4-128

cipher@TLS = AES-256-GCM AES-256-CCM CHACHA20-POLY1305 AES-256-CBC \
             AES-128-GCM AES-128-CCM AES-128-CBC 3DES-CBC RC4-128

# 'RSA' is intentionally before DHE ciphersuites, as the DHE ciphersuites have
# interoperability issues in TLS.
key_exchange = ECDHE RSA DHE DHE-RSA DHE-DSS PSK DHE-PSK ECDHE-PSK ECDHE-GSS DHE-GSS

protocol@TLS = TLS1.3 TLS1.2 TLS1.1 TLS1.0 DTLS1.2 DTLS1.0
protocol@IKE = IKEv2

# Parameter sizes
min_dh_size = 1023
min_dsa_size = 1023
min_rsa_size = 1023

# GnuTLS only for now
sha1_in_certs = 1

arbitrary_dh_groups = 1
ssh_certs = 1
ssh_etm = 1