# 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 80-bit security and excludes 3DES and RC4.

# MACs: all HMAC with SHA1 or better + all modern MACs (Poly1305 etc)
# Curves: all prime >= 255 bits (including Bernstein curves), hybrid ML-KEM
# Signature algorithms: with SHA-1 hash or better (no DSA), pure ML-DSA
# Ciphers: all available > 112-bit key, >= 128-bit block
#   (excluding 3DES and RC4)
# key exchange: ECDHE, RSA, DHE (no DHE-DSS)
# DH params size: >= 2048
# RSA params size: >= 2048
# DSA params size: DSA is not allowed
# TLS protocols: TLS >= 1.2 DTLS >= 1.2

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 = MLKEM768-X25519 P256-MLKEM768 P384-MLKEM1024 MLKEM1024-X448 \
        X25519 SECP256R1 X448 SECP521R1 SECP384R1 \
        FFDHE-2048 FFDHE-3072 FFDHE-4096 FFDHE-6144 FFDHE-8192 FFDHE-1536

hash = SHA2-256 SHA2-384 SHA2-512 SHA3-256 SHA3-384 SHA3-512 SHA2-224 SHA3-224 \
       SHAKE-256 SHAKE-128 SHA1

sign = MLDSA44 MLDSA65 MLDSA87 \
       ECDSA-SHA3-256 ECDSA-SHA2-256 ECDSA-SHA2-256-FIDO \
       ECDSA-SHA3-384 ECDSA-SHA2-384 \
       ECDSA-SHA3-512 ECDSA-SHA2-512 \
       EDDSA-ED25519 EDDSA-ED25519-FIDO EDDSA-ED448 \
       RSA-PSS-SHA3-256 RSA-PSS-SHA2-256 \
       RSA-PSS-SHA3-384 RSA-PSS-SHA2-384 \
       RSA-PSS-SHA3-512 RSA-PSS-SHA2-512 \
       RSA-PSS-RSAE-SHA3-256 RSA-PSS-RSAE-SHA2-256 \
       RSA-PSS-RSAE-SHA3-384 RSA-PSS-RSAE-SHA2-384 \
       RSA-PSS-RSAE-SHA3-512 RSA-PSS-RSAE-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 \
       ECDSA-SHA3-224 RSA-PSS-SHA3-224 RSA-SHA3-224
sign@DNSSec = RSA-SHA1+ ECDSA-SHA1+
sign@{sequoia,RPM} = MLDSA65-ED25519+ MLDSA87-ED448+  # Standardized in OpenPGP

cipher = AES-256-GCM AES-256-CCM \
    CHACHA20-POLY1305 \
    AES-256-CTR AES-256-CBC \
    AES-128-GCM AES-128-CCM \
    AES-128-CTR AES-128-CBC

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

cipher@SSH = AES-256-GCM CHACHA20-POLY1305 AES-256-CTR AES-256-CBC \
    AES-128-GCM AES-128-CTR AES-128-CBC

cipher@{sequoia,RPM} = AES-256-CFB AES-256-GCM AES-256-OCB AES-256-EAX \
    AES-128-CFB AES-128-GCM AES-128-OCB AES-128-EAX

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

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

cipher@pkcs12 = AES-256-CBC AES-192-CBC AES-128-CBC \
    CAMELLIA-256-CBC CAMELLIA-192-CBC CAMELLIA-128-CBC \
    3DES-CBC DES-CBC RC4-128 DES40-CBC RC2-CBC
cipher@smime = AES-256-CBC AES-192-CBC AES-128-CBC 3DES-CBC DES-CBC RC2-CBC
hash@{pkcs12,smime} = SHA2-256 SHA2-384 SHA2-512 SHA3-256 SHA3-384 SHA3-512 \
    SHA2-224 SHA3-224 \
    SHA1 MD5
key_exchange@smime = RSA DH ECDH

# Parameter sizes
min_dh_size = 2048
min_dsa_size = 2048  # DSA is disabled
min_rsa_size = 2048

# GnuTLS only for now
sha1_in_certs = 1
__rsaes_pkcs1_v1_5_encrypt_decrypt = ALLOW

arbitrary_dh_groups = 1
ssh_certs = 1
etm@SSH = ANY