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Version: 8.2405.x.x RR

Crypto support

FIDO UAF​

Supported Public Key Formats​

nevisFIDO stores the public keys of the FIDO UAF authenticators as sent by the FIDO client during the FIDO UAF registration. nevisFIDO supports the following public key algorithms:

  • ALG_KEY_ECC_X962_DER: ASN.1 DER [ITU-X690-2008] encoded ANSI X.9.62 formatted SubjectPublicKeyInfo [RFC5480].
  • ALG_KEY_ECC_X962_RAW: Raw ANSI X9.62 formatted Elliptic Curve public key.
  • ALG_KEY_RSA_2048_DER: ASN.1 DER [ITU-X690-2008] encoded 2048-bit RSA [RFC3447] public key [RFC4055].
  • ALG_KEY_RSA_2048_RAW: Raw encoded 2048-bit RSA public key [RFC3447].

Supported Authentication Algorithms​

During registration and authentication, the FIDO UAF client sends attestations to nevisFIDO. nevisFIDO supports the following algorithms when validating the signature of these attestations:

  • ALG_SIGN_SECP256R1_ECDSA_SHA256_DER: DER [ITU-X690-2008] encoded ECDSA signature [RFC5480] on the NIST secp256r1 curve.
  • ALG_SIGN_SECP256R1_ECDSA_SHA256_RAW: ECDSA-ANSI encoded ECDSA signature [RFC5480] on the NIST secp256r1 curve.
  • ALG_SIGN_SECP256K1_ECDSA_SHA256_DER: DER [ITU-X690-2008] encoded ECDSA signature [RFC5480] on the secp256k1 curve.
  • ALG_SIGN_SECP256K1_ECDSA_SHA256_RAW: ECDSA encoded ECDSA signature on the secp256k1 curve.
  • ALG_SIGN_RSASSA_PSS_SHA256_DER: DER [ITU-X690-2008] encoded OCTET STRING containing the RSASSA-PSS [RFC3447] signature.
  • ALG_SIGN_RSASSA_PSS_SHA256_RAW: RAW encoded RSASSA-PSS [RFC3447] signature [RFC4055][RFC4056].
  • ALG_SIGN_RSA_EMSA_PKCS1_SHA256_DER: DER [ITU-X690-2008] encoded OCTET STRING containing the EMSA-PKCS1-v1_5 signature [RFC3447].
  • ALG_SIGN_RSA_EMSA_PKCS1_SHA256_RAW: RAW encoded EMSA-PKCS1-v1_5 signature [RFC3447].

Supported Encryption Methods by the FCM (Firebase Cloud Messaging) Dispatcher​

The FCM Dispatcher encrypts the tokens sent through the Firebase Cloud Messaging push service. The following encryption algorithms are supported:

  • RSA-OAEP-256 with encryption method A256CBC_HS512
    • RSA-OAEP-256: RSAES using Optimal Asymmetric Encryption Padding with SHA-256 hash function.
    • A256CBC_HS512: AES_256_CBC_HMAC_SHA_512 authenticated encryption using a 512 bit.
  • ECDH-ES+A256KW with encryption method A256CBC_HS512
    • ECDH-ES+A256KW: Elliptic Curve Diffie-Hellman Ephemeral Static key agreement, where the agreed-upon key is used to wrap the Content Encryption Key (CEK) with the A256KW function.
    • A256CBC_HS512: AES_256_CBC_HMAC_SHA_512 authenticated encryption using a 512 bit.

Supported Signature Methods to Modify Dispatch Targets​

To modify dispatch targets (see the Modify Dispatch Target HTTP API) , the client must sign the modification payload. nevisFIDO supports the following JWS algorithms:

  • RS256: RSASSA-PKCS1-v1_5 using SHA-256
  • RS384: RSASSA-PKCS1-v1_5 using SHA-384
  • RS512: RSASSA-PKCS1-v1_5 using SHA-512
  • PS256: RSASSA-PSS using SHA-256 and MGF1 with SHA-256
  • PS384: RSASSA-PSS using SHA-384 and MGF1 with SHA-384
  • PS512: RSASSA-PSS using SHA-512 and MGF1 with SHA-512
  • ES256: ECDSA using P-256 and SHA-256
  • ES384: ECDSA using P-384 and SHA-384
  • ES512: ECDSA using P-521 and SHA-512

FIDO2​

Supported signature algorithms​

The following algorithms are supported and configurable during registration for the client authenticator to generate the key material with.

  • ES256 : ECDSA using P-256 and SHA-256 (default)
  • ES384 : ECDSA using P-384 and SHA-384
  • ES512 : ECDSA using P-521 and SHA-512
  • RS256 : RSASSA-PKCS1-v1_5 using SHA-256
  • RS384 : RSASSA-PKCS1-v1_5 using SHA-384
  • RS512 : RSASSA-PKCS1-v1_5 using SHA-512
  • RS1 : RSASSA-PKCS1-v1_5 with SHA1

Supported attestation statement format​

  • Packed attestation
  • FIDO U2F attestation
  • Android Key attestation
  • Android SafetyNet attestation
  • TPM attestation
  • Apple Anonymous attestation
  • None attestation