Feature configurations and driver support

This section covers the configurations available when using PSA drivers.

Configuring multiple drivers 

Multiple PSA drivers can be enabled at the same time, with added support for fine-grained control of which drivers implement support for cryptographic features.

To enable a PSA driver, set the configurations in the following table:

PSA driver	Configuration option	Notes
nrf_cc3xx	`CONFIG_PSA_CRYPTO_DRIVER_CC3XX`	Only on nRF52840, nRF91 Series, and nRF5340 devices
nrf_cracen	`CONFIG_PSA_CRYPTO_DRIVER_CRACEN`	Only on nRF54L Series devices
nrf_oberon	`CONFIG_PSA_CRYPTO_DRIVER_OBERON`

If multiple drivers are enabled, the first ordered item in this table takes precedence for an enabled cryptographic feature, unless the driver does not enable or support it.

The Arm CryptoCell cc3xx driver allows enabling or disabling of specific PSA APIs (such as psa_cipher_encrypt, psa_sign_hash), but not individual algorithms.

The nrf_oberon driver allows finer configuration granularity, allowing you to enable or disable individual algorithms as well.

When multiple enabled drivers support the same cryptographic feature, the configuration system attempts to include only one implementation to minimize code size.

Key type configurations 

To enable key types for cryptographic algorithms, set one or more of the Kconfig options in the following table:

Key type	Configuration option
AES	`CONFIG_PSA_WANT_KEY_TYPE_AES`
ARIA	`CONFIG_PSA_WANT_KEY_TYPE_ARIA`
DES (weak)	`CONFIG_PSA_WANT_KEY_TYPE_DES`
CAMELLIA	`CONFIG_PSA_WANT_KEY_TYPE_CAMELLIA`
SM4	`CONFIG_PSA_WANT_KEY_TYPE_SM4`
ARC4 (weak)	`CONFIG_PSA_WANT_KEY_TYPE_ARC4`
Chacha20	`CONFIG_PSA_WANT_KEY_TYPE_CHACHA20`
ECC Key Pair	`CONFIG_PSA_WANT_KEY_TYPE_ECC_KEY_PAIR`
ECC Public Key	`CONFIG_PSA_WANT_KEY_TYPE_ECC_PUBLIC_KEY`
RSA Key Pair	`CONFIG_PSA_WANT_KEY_TYPE_RSA_KEY_PAIR`
RSA Public Key	`CONFIG_PSA_WANT_KEY_TYPE_RSA_PUBLIC_KEY`
DH Key Pair	`CONFIG_PSA_WANT_KEY_TYPE_DH_KEY_PAIR`
DH Public key	`CONFIG_PSA_WANT_KEY_TYPE_DH_PUBLIC_KEY`

Key type support 

The following table shows key type support for each driver:

Key type	nrf_cc3xx driver support	nrf_oberon driver support	nrf_cracen driver support
AES	Supported	Supported	Supported
ARIA	Not supported	Not supported	Not supported
DES (weak)	Not supported	Not supported	Not supported
CAMELLIA	Not supported	Not supported	Not supported
SM4	Not supported	Not supported	Not supported
ARC4 (weak)	Not supported	Not supported	Not supported
Chacha20	Supported	Supported	Supported
ECC Key Pair	Supported	Supported	Supported
ECC Public Key	Supported	Supported	Supported
RSA Key Pair	Supported	Supported	Supported
RSA Public Key	Supported	Supported	Supported
DH Key Pair	Not supported	Not supported	Not supported
DH Public Key	Not supported	Not supported	Not supported

The Kconfig option CONFIG_PSA_USE_CC3XX_KEY_MANAGEMENT_DRIVER enables the Arm CryptoCell cc3xx driver for all supported key types.

The Kconfig option CONFIG_PSA_USE_CRACEN_KEY_MANAGEMENT_DRIVER enables the CRACEN driver for all supported key types.

Cipher configurations 

To enable cipher modes, set one or more of the Kconfig options in the following table:

Cipher mode	Configuration option
ECB no padding	`CONFIG_PSA_WANT_ALG_ECB_NO_PADDING`
CBC no padding	`CONFIG_PSA_WANT_ALG_CBC_NO_PADDING`
CBC PKCS#7 padding	`CONFIG_PSA_WANT_ALG_CBC_PKCS7`
CTR	`CONFIG_PSA_WANT_ALG_CTR`
CCM* no tag	`CONFIG_PSA_WANT_ALG_CCM_STAR_NO_TAG`
XTS	`CONFIG_PSA_WANT_ALG_XTS`
Stream cipher	`CONFIG_PSA_WANT_ALG_STREAM_CIPHER`

Cipher support 

The following table shows cipher algorithm support for each driver:

Cipher mode	nrf_cc3xx driver support	nrf_oberon driver support	nrf_cracen driver support
ECB no padding	Supported	Supported	Supported
CBC no padding	Supported	Supported	Supported
CBC PKCS#7 padding	Supported	Supported	Supported
CTR	Supported	Supported	Supported
CCM* no tag	Not supported	Supported	Not supported
XTS	Not supported	Not supported	Not supported
Stream cipher	Supported	Supported	Supported

The Kconfig option CONFIG_PSA_USE_CC3XX_CIPHER_DRIVER enables the Arm CryptoCell cc3xx driver for all supported algorithms.

The configuration of the nrf_oberon driver is automatically generated based on the user-enabled algorithms in Cipher configurations.

The Kconfig option CONFIG_PSA_USE_CRACEN_CIPHER_DRIVER enables the CRACEN driver for all supported algorithms.

Key size configuration is supported as described in AES key size configuration, for all algorithms except the stream cipher.

Note

The Arm CryptoCell cc3xx driver is limited to AES key sizes of 128 bits on devices with Arm CryptoCell cc310.

Key agreement configurations 

To enable key agreement support, set one or more of the Kconfig options in the following table:

Key agreement algorithm	Configuration option
ECDH	`CONFIG_PSA_WANT_ALG_ECDH`
FFDH	`CONFIG_PSA_WANT_ALG_FFDH`

Key agreement support 

The following table shows Key agreement support for each driver:

Key agreement algorithm	nrf_cc3xx driver support	nrf_oberon driver support	nrf_cracen driver support
ECDH	Supported	Supported	Supported
FFDH	Not supported	Not supported	Not supported

The Kconfig option CONFIG_PSA_USE_CC3XX_KEY_AGREEMENT_DRIVER enables the Arm CryptoCell cc3xx driver for all supported algorithms.

The Kconfig option CONFIG_PSA_USE_CRACEN_KEY_AGREEMENT_DRIVER enables the CRACEN driver for all supported algorithms.

The algorithm support when using ECC key types is dependent on one or more Kconfig options enabling curve support according to ECC curve configurations.

Note

The nrf_oberon driver is currently limited to curve types secp224r1, secp256r1, secp384r1, and Curve25519 for ECDH.

Key derivation function configurations 

To enable key derivation function (KDF) support, set one or more of the Kconfig options in the following table:

KDF algorithm	Configuration option
HKDF	`CONFIG_PSA_WANT_ALG_HKDF`
HKDF-Extract	`CONFIG_PSA_WANT_ALG_HKDF_EXTRACT`
HKDF-Expand	`CONFIG_PSA_WANT_ALG_HKDF_EXPAND`
PBKDF2-HMAC	`CONFIG_PSA_WANT_ALG_PBKDF2_HMAC`
PBKDF2-AES-CMAC-PRF-128	`CONFIG_PSA_WANT_ALG_PBKDF2_AES_CMAC_PRF_128`
TLS 1.2 PRF	`CONFIG_PSA_WANT_ALG_TLS12_PRF`
TLS 1.2 PSK to MS	`CONFIG_PSA_WANT_ALG_TLS12_PSK_TO_MS`
TLS 1.2 EC J-PAKE to PMS	`CONFIG_PSA_WANT_ALG_TLS12_ECJPAKE_TO_PMS`
SP 800-108r1 CMAC w/counter	`CONFIG_PSA_WANT_ALG_SP800_108_COUNTER_CMAC`

Key derivation function support 

The following table shows key derivation function (KDF) support for each driver:

KDF algorithm	nrf_cc3xx driver support	nrf_oberon driver support	nrf_cracen driver support
HKDF	Not supported	Supported	Supported
HKDF-Extract	Not supported	Supported	Not Supported
HKDF-Expand	Not supported	Supported	Not Supported
PBKDF2-HMAC	Not supported	Supported	Supported
PBKDF2-AES-CMAC-PRF-128	Not supported	Supported	Supported
TLS 1.2 PRF	Not supported	Supported	Not Supported
TLS 1.2 PSK to MS	Not supported	Supported	Not Supported
TLS 1.2 EC J-PAKE to PMS	Not supported	Supported	Supported
SP 800-108r1 CMAC w/counter	Not supported	Not supported	Supported

The configuration of the nrf_oberon driver is automatically generated based on the user-enabled algorithms in Key derivation function configurations.

The Kconfig option CONFIG_PSA_USE_CRACEN_KEY_DERIVATION_DRIVER enables the CRACEN driver for all supported algorithms.

MAC configurations 

To enable MAC support, set one or more of the Kconfig options in the following table:

MAC cipher	Configuration option
CMAC	`CONFIG_PSA_WANT_ALG_CMAC`
HMAC	`CONFIG_PSA_WANT_ALG_HMAC`
CBC-MAC	`CONFIG_PSA_WANT_ALG_CBC_MAC`

MAC support 

The following table shows MAC algorithm support for each driver:

MAC cipher	nrf_cc3xx driver support	nrf_oberon driver support	nrf_cracen driver support
CMAC	Supported	Supported	Supported
HMAC	Supported	Supported	Supported
CBC-MAC	Not supported	Not supported	Not Supported

The Kconfig option CONFIG_PSA_USE_CC3XX_MAC_DRIVER enables the Arm CryptoCell cc3xx driver for all supported algorithms.

The configuration of the nrf_oberon driver is automatically generated based on the user-enabled algorithms in MAC configurations.

The Kconfig option CONFIG_PSA_USE_CRACEN_MAC_DRIVER enables the CRACEN driver for all supported algorithms.

Key size configuration for CMAC is supported as described in AES key size configuration.

Note

The Arm CryptoCell cc3xx driver is limited to CMAC using AES key sizes of 128 bits on devices with Arm CryptoCell cc310.
The Arm CryptoCell cc3xx driver is limited to HMAC using SHA-1, SHA-224, and SHA-256.

AEAD configurations 

To enable Authenticated Encryption with Associated Data (AEAD), set one or more of the Kconfig options in the following table:

AEAD cipher	Configuration option
CCM	`CONFIG_PSA_WANT_ALG_CCM`
GCM	`CONFIG_PSA_WANT_ALG_GCM`
ChaCha20-Poly1305	`CONFIG_PSA_WANT_ALG_CHACHA20_POLY1305`

AEAD support 

The following table shows AEAD algorithm support for each driver:

AEAD cipher	nrf_cc3xx driver support	nrf_oberon driver support	nrf_cracen driver support
CCM	Supported	Supported	Supported
GCM	Supported	Supported	Supported
ChaCha20-Poly1305	Supported	Supported	Supported

The Kconfig option CONFIG_PSA_USE_CC3XX_AEAD_DRIVER enables the Arm CryptoCell cc3xx driver for all supported algorithms.

Configuration of the nrf_oberon driver is automatically generated based on the user-enabled algorithms in AEAD configurations.

The Kconfig option CONFIG_PSA_USE_CRACEN_AEAD_DRIVER enables the CRACEN driver for all supported algorithms.

Key size configuration for CCM and GCM is supported as described in AES key size configuration.

Note

The Arm CryptoCell cc3xx driver is limited to AES key sizes of 128 bits on devices with Arm CryptoCell cc310.
The Arm CryptoCell cc3xx driver does not provide hardware support for GCM on devices with Arm CryptoCell cc310.

Asymmetric signature configurations 

To enable asymmetric signature support, set one or more of the Kconfig options in the following table:

Asymmetric signature algorithms	Configuration option
ECDSA	`CONFIG_PSA_WANT_ALG_ECDSA`
ECDSA without hashing	`CONFIG_PSA_WANT_ALG_ECDSA_ANY`
ECDSA (deterministic)	`CONFIG_PSA_WANT_ALG_DETERMINISTIC_ECDSA`
PureEdDSA	`CONFIG_PSA_WANT_ALG_PURE_EDDSA`
HashEdDSA Edwards25519	`CONFIG_PSA_WANT_ALG_ED25519PH`
HashEdDSA Edwards448	`CONFIG_PSA_WANT_ALG_ED448PH`
RSA PKCS#1 v1.5 sign	`CONFIG_PSA_WANT_ALG_RSA_PKCS1V15_SIGN`
RSA raw PKCS#1 v1.5 sign	`CONFIG_PSA_WANT_ALG_RSA_PKCS1V15_SIGN_RAW`
RSA PSS	`CONFIG_PSA_WANT_ALG_RSA_PSS`
RSA PSS any salt	`CONFIG_PSA_WANT_ALG_RSA_PSS_ANY_SALT`

Asymmetric signature support 

The following table shows asymmetric signature algorithm support for each driver:

Asymmetric signature algorithms	nrf_cc3xx driver support	nrf_oberon driver support	nrf_cracen driver support
ECDSA	Supported	Supported	Supported
ECDSA without hashing	Supported	Supported	Supported
ECDSA (deterministic)	Supported	Supported	Supported
PureEdDSA	Supported	Supported	Supported
HashEdDSA Edwards25519	Not supported	Not supported	Not supported
HashEdDSA Edwards448	Not supported	Not supported	Not supported
RSA PKCS#1 v1.5 sign	Supported	Supported	Supported
RSA raw PKCS#1 v1.5 sign	Supported	Supported	Not Supported
RSA PSS	Not supported	Supported	Supported
RSA PSS any salt	Not supported	Supported	Not Supported

The Kconfig option CONFIG_PSA_USE_CC3XX_ASYMMETRIC_SIGNATURE_DRIVER enables the driver Arm CryptoCell cc3xx driver for all supported algorithms.

Configuration of the nrf_oberon driver is automatically generated based on the user-enabled algorithms in Asymmetric signature configurations.

The Kconfig option CONFIG_PSA_USE_CRACEN_ASYMMETRIC_SIGNATURE_DRIVER enables the driver CRACEN driver for all supported algorithms.

The algorithm support when using ECC key types is dependent on one or more Kconfig options enabling curve support according to ECC curve configurations.

RSA key size configuration is supported as described in RSA key size configuration.

Note

Arm CryptoCell cc3xx driver is limited to RSA key sizes less than or equal to 2048 bits.
nrf_oberon driver does not support RSA key pair generation.
nrf_oberon driver is currently limited to ECC curve types secp224r1, secp256r1, and secp384r1 for ECDSA.
nrf_oberon driver is currently limited to ECC curve type Ed25519 for EdDSA.

Asymmetric encryption configurations 

To enable asymmetric encryption, set one or more of the Kconfig options in the following table:

Asymmetric encryption algorithm	Configuration option
RSA OAEP	`CONFIG_PSA_WANT_ALG_RSA_OAEP`
RSA PKCS#1 v1.5 crypt	`CONFIG_PSA_WANT_ALG_RSA_PKCS1V15_CRYPT`

Asymmetric encryption support 

The following table shows asymmetric encryption algorithm support for each driver:

Asymmetric encryption algorithm	nrf_cc3xx driver support	nrf_oberon driver support	nrf_cracen driver support
RSA OAEP	Supported	Supported	Supported
RSA PKCS#1 v1.5 crypt	Supported	Supported	Supported

The Kconfig option CONFIG_PSA_USE_CC3XX_ASYMMETRIC_ENCRYPTION_DRIVER enables the Arm CryptoCell cc3xx driver for all supported algorithms.

Configuration of the nrf_oberon driver is automatically generated based on the user-enabled algorithms in Asymmetric encryption configurations.

The Kconfig option CONFIG_PSA_USE_CRACEN_ASYMMETRIC_DRIVER enables the CRACEN driver for all supported algorithms.

RSA key size configuration is supported as described in RSA key size configuration.

Note

Arm CryptoCell cc3xx driver is limited to key sizes less than or equal to 2048 bits.
nrf_oberon driver does not support RSA key pair generation.

ECC curve configurations 

To configure elliptic curve support, set one or more of the Kconfig options in the following table:

ECC curve type	Configuration option
BrainpoolP160r1 (weak)	`CONFIG_PSA_WANT_ECC_BRAINPOOL_P_R1_160`
BrainpoolP192r1	`CONFIG_PSA_WANT_ECC_BRAINPOOL_P_R1_192`
BrainpoolP224r1	`CONFIG_PSA_WANT_ECC_BRAINPOOL_P_R1_224`
BrainpoolP256r1	`CONFIG_PSA_WANT_ECC_BRAINPOOL_P_R1_256`
BrainpoolP320r1	`CONFIG_PSA_WANT_ECC_BRAINPOOL_P_R1_320`
BrainpoolP384r1	`CONFIG_PSA_WANT_ECC_BRAINPOOL_P_R1_384`
BrainpoolP512r1	`CONFIG_PSA_WANT_ECC_BRAINPOOL_P_R1_512`
Curve25519 (X25519)	`CONFIG_PSA_WANT_ECC_MONTGOMERY_255`
Curve448 (X448)	`CONFIG_PSA_WANT_ECC_MONTGOMERY_448`
Edwards25519 (Ed25519)	`CONFIG_PSA_WANT_ECC_TWISTED_EDWARDS_255`
Edwards448 (Ed448)	`CONFIG_PSA_WANT_ECC_TWISTED_EDWARDS_448`
secp192k1	`CONFIG_PSA_WANT_ECC_SECP_K1_192`
secp224k1	`CONFIG_PSA_WANT_ECC_SECP_K1_224`
secp256k1	`CONFIG_PSA_WANT_ECC_SECP_K1_256`
secp192r1	`CONFIG_PSA_WANT_ECC_SECP_R1_192`
secp224r1	`CONFIG_PSA_WANT_ECC_SECP_R1_224`
secp256r1	`CONFIG_PSA_WANT_ECC_SECP_R1_256`
secp384r1	`CONFIG_PSA_WANT_ECC_SECP_R1_384`
secp521r1	`CONFIG_PSA_WANT_ECC_SECP_R1_521`
secp160r2 (weak)	`CONFIG_PSA_WANT_ECC_SECP_R2_160`
sect163k1 (weak)	`CONFIG_PSA_WANT_ECC_SECT_K1_163`
sect233k1	`CONFIG_PSA_WANT_ECC_SECT_K1_233`
sect239k1	`CONFIG_PSA_WANT_ECC_SECT_K1_239`
sect283k1	`CONFIG_PSA_WANT_ECC_SECT_K1_283`
sect409k1	`CONFIG_PSA_WANT_ECC_SECT_K1_409`
sect571k1	`CONFIG_PSA_WANT_ECC_SECT_K1_571`
sect163r1 (weak)	`CONFIG_PSA_WANT_ECC_SECT_R1_163`
sect233r1	`CONFIG_PSA_WANT_ECC_SECT_R1_233`
sect283r1	`CONFIG_PSA_WANT_ECC_SECT_R1_283`
sect409r1	`CONFIG_PSA_WANT_ECC_SECT_R1_409`
sect571r1	`CONFIG_PSA_WANT_ECC_SECT_R1_571`
sect163r2 (weak)	`CONFIG_PSA_WANT_ECC_SECT_R2_163`
FRP256v1	`CONFIG_PSA_WANT_ECC_FRP_V1_256`

ECC curve support 

The following table shows ECC curve support for each driver:

ECC curve type	nrf_cc3xx driver support	nrf_oberon driver support	nrf_cracen driver support
BrainpoolP160r1 (weak)	Not supported	Not supported	Not supported
BrainpoolP192r1	Not supported	Not supported	Supported
BrainpoolP224r1	Not supported	Not supported	Supported
BrainpoolP256r1	Supported	Not supported	Supported
BrainpoolP320r1	Not supported	Not supported	Supported
BrainpoolP384r1	Not supported	Not supported	Supported
BrainpoolP512r1	Not supported	Not supported	Supported
Curve25519 (X25519)	Supported	Supported	Supported
Curve448 (X448)	Not supported	Not supported	Supported
Edwards25519 (Ed25519)	Supported	Supported	Supported
Edwards448 (Ed448)	Not supported	Not supported	Supported
secp192k1	Supported	Not supported	Supported
secp224k1	Not supported	Not supported	Not supported
secp256k1	Supported	Not supported	Supported
secp192r1	Supported	Not supported	Supported
secp224r1	Supported	Supported	Supported
secp256r1	Supported	Supported	Supported
secp384r1	Supported	Supported	Supported
secp521r1	Not supported	Not supported	Supported
secp160r2 (weak)	Not supported	Not supported	Not supported
sect163k1 (weak)	Not supported	Not supported	Not supported
sect233k1	Not supported	Not supported	Not supported
sect239k1	Not supported	Not supported	Not supported
sect283k1	Not supported	Not supported	Not supported
sect409k1	Not supported	Not supported	Not supported
sect571k1	Not supported	Not supported	Not supported
sect163r1 (weak)	Not supported	Not supported	Not supported
sect233r1	Not supported	Not supported	Not supported
sect283r1	Not supported	Not supported	Not supported
sect409r1	Not supported	Not supported	Not supported
sect571r1	Not supported	Not supported	Not supported
sect163r2 (weak)	Not supported	Not supported	Not supported
FRP256v1	Not supported	Not supported	Not supported

The Kconfig option CONFIG_PSA_USE_CC3XX_KEY_MANAGEMENT_DRIVER enables the Arm CryptoCell cc3xx driver for key management using ECC curves.

The Kconfig option CONFIG_PSA_USE_CRACEN_KEY_MANAGEMENT_DRIVER enables the CRACEN driver for key management using ECC curves.

RNG configurations 

Enable RNG using the CONFIG_PSA_WANT_GENERATE_RANDOM Kconfig option.

RNG uses PRNG seeded by entropy (also known as TRNG). When RNG is enabled, set at least one of the configurations in the following table:

PRNG algorithms	Configuration option
CTR-DRBG	`CONFIG_PSA_WANT_ALG_CTR_DRBG`
HMAC-DRBG	`CONFIG_PSA_WANT_ALG_HMAC_DRBG`

Note

Both PRNG algorithms are NIST qualified Cryptographically Secure Pseudo Random Number Generators (CSPRNG).
CONFIG_PSA_WANT_ALG_CTR_DRBG and CONFIG_PSA_WANT_ALG_HMAC_DRBG are custom configurations not described by the PSA Crypto specification.
If multiple PRNG algorithms are enabled at the same time, CTR-DRBG will be prioritized for random number generation through the front-end APIs for PSA Crypto.

RNG support 

The PSA drivers using the Arm CryptoCell peripheral are enabled by default for nRF52840, nRF91 Series, and nRF5340 devices.

Note

When using CryptoCell, only 1024 bytes can be requested at a time.

For devices without a hardware-accelerated cryptographic engine, entropy is provided by the nRF RNG peripheral. PRNG support is provided by the Oberon PSA driver, which is implemented using software.

The Kconfig option CONFIG_PSA_USE_CRACEN_CTR_DRBG_DRIVER enables the CRACEN driver for the CTR-DRBG algorithm.

Hash configurations 

To configure the Hash algorithms, set one or more of the Kconfig options in the following table:

Hash algorithm	Configuration option
SHA-1 (weak)	`CONFIG_PSA_WANT_ALG_SHA_1`
SHA-224	`CONFIG_PSA_WANT_ALG_SHA_224`
SHA-256	`CONFIG_PSA_WANT_ALG_SHA_256`
SHA-384	`CONFIG_PSA_WANT_ALG_SHA_384`
SHA-512	`CONFIG_PSA_WANT_ALG_SHA_512`
SHA-512/224	`CONFIG_PSA_WANT_ALG_SHA_512_224`
SHA-512/256	`CONFIG_PSA_WANT_ALG_SHA_512_256`
SHA3-224	`CONFIG_PSA_WANT_ALG_SHA3_224`
SHA3-256	`CONFIG_PSA_WANT_ALG_SHA3_256`
SHA3-384	`CONFIG_PSA_WANT_ALG_SHA3_384`
SHA3-512	`CONFIG_PSA_WANT_ALG_SHA3_512`
SM3	`CONFIG_PSA_WANT_ALG_SM3`
SHAKE256 512 bits	`CONFIG_PSA_WANT_ALG_SHAKE256_512`
MD2 (weak)	`CONFIG_PSA_WANT_ALG_MD2`
MD4 (weak)	`CONFIG_PSA_WANT_ALG_MD4`
MD5 (weak)	`CONFIG_PSA_WANT_ALG_MD5`
RIPEMD-160	`CONFIG_PSA_WANT_ALG_RIPEMD160`

Note

The SHA-1 hash is weak and deprecated and is only recommended for use in legacy protocols.
The MD5 hash is weak and deprecated and is only recommended for use in legacy protocols.

Hash support 

The following table shows hash algorithm support for each driver:

Hash algorithm	nrf_cc3xx driver support	nrf_oberon driver support	nrf_cracen driver support
SHA-1 (weak)	Supported	Supported	Supported
SHA-224	Supported	Supported	Supported
SHA-256	Supported	Supported	Supported
SHA-384	Not supported	Supported	Supported
SHA-512	Not supported	Supported	Supported
SHA-512/224	Not supported	Not supported	Not supported
SHA-512/256	Not supported	Not supported	Not supported
SHA3-224	Not supported	Not supported	Supported
SHA3-256	Not supported	Not supported	Supported
SHA3-384	Not supported	Not supported	Supported
SHA3-512	Not supported	Not supported	Supported
SM3	Not supported	Not supported	Not supported
SHAKE256 512 bits	Not supported	Not supported	Not supported
MD2 (weak)	Not supported	Not supported	Not supported
MD4 (weak)	Not supported	Not supported	Not supported
MD5 (weak)	Not supported	Not supported	Not supported
RIPEMD160	Not supported	Not supported	Not supported

The Kconfig option CONFIG_PSA_USE_CC3XX_HASH_DRIVER enables the Arm CryptoCell cc3xx driver for all supported algorithms.

The configuration of the nrf_oberon driver is automatically generated based on the user-enabled algorithms in Hash configurations.

The Kconfig option CONFIG_PSA_USE_CRACEN_HASH_DRIVER enables the CRACEN driver for all supported algorithms.

Password-authenticated key exchange configurations 

To enable password-authenticated key exchange (PAKE) support, set one or more of the Kconfig options in the following table:

PAKE algorithm	Configuration option
EC J-PAKE	`CONFIG_PSA_WANT_ALG_JPAKE`
SPAKE2+ with HMAC	`CONFIG_PSA_WANT_ALG_SPAKE2P_HMAC`
SPAKE2+ with CMAC	`CONFIG_PSA_WANT_ALG_SPAKE2P_CMAC`
SPAKE2+ for Matter	`CONFIG_PSA_WANT_ALG_SPAKE2P_MATTER`
SRP-6	`CONFIG_PSA_WANT_ALG_SRP_6`
SRP-6 password hashing	`CONFIG_PSA_WANT_ALG_SRP_6`

Note

The provided support is experimental.

Password-authenticated key exchange support 

The following table shows PAKE algorithm support for each driver:

PAKE algorithm	nrf_cc3xx driver support	nrf_oberon driver support	nrf_cracen driver support
EC J-PAKE	Not supported	Supported	Supported
SPAKE2+	Not supported	Supported	Supported
SRP-6	Not supported	Supported	Supported

Configuration of the nrf_oberon driver is automatically generated based on the user-enabled algorithms in Password-authenticated key exchange configurations.

The Kconfig option CONFIG_PSA_USE_CRACEN_PAKE_DRIVER enables the CRACEN driver for all supported algorithms.

Key size configurations 

nRF Security supports key size configuration options for AES and RSA keys.

AES key size configuration 

To enable AES key size support, set one or more of the Kconfig options in the following table:

AES key size	Configuration option
128 bits	`CONFIG_PSA_WANT_AES_KEY_SIZE_128`
192 bits	`CONFIG_PSA_WANT_AES_KEY_SIZE_192`
256 bits	`CONFIG_PSA_WANT_AES_KEY_SIZE_256`

Note

All AES key size configurations are introduced by nRF Security and are not described by the PSA Crypto specification.

RSA key size configuration 

To enable RSA key size support, set one or more of the Kconfig options in the following table:

RSA key size	Configuration option	nrf_cc3xx driver support	nrf_oberon driver support	nrf_cracen driver support
1024 bits	`CONFIG_PSA_WANT_RSA_KEY_SIZE_1024`	Supported	Supported	Not supported
1536 bits	`CONFIG_PSA_WANT_RSA_KEY_SIZE_1536`	Supported	Supported	Not supported
2048 bits	`CONFIG_PSA_WANT_RSA_KEY_SIZE_2048`	Supported	Supported	Supported
3072 bits	`CONFIG_PSA_WANT_RSA_KEY_SIZE_3072`	Supported (CC312 only)	Supported	Supported
4096 bits	`CONFIG_PSA_WANT_RSA_KEY_SIZE_4096`	Not supported	Supported	Supported
6144 bits	`CONFIG_PSA_WANT_RSA_KEY_SIZE_6144`	Not supported	Supported	Not supported
8192 bits	`CONFIG_PSA_WANT_RSA_KEY_SIZE_8192`	Not supported	Supported	Not supported

Note

All RSA key size configurations are introduced by nRF Security and are not described by the PSA Crypto specification.