EC256/RSA encryption doesn't build with PSA backend

[stindaNXP]

Hi

This is basically re-opening the #2629

I have applied the patch provided by de-nordic, this fixed the issue with serial recovery and partially with RSA but the project (standalone, non-zephyr) still cannot be build.
This is my mcuboot_config.h

...
MCUBOOT_SIGN_EC256
MCUBOOT_ENC_IMAGES
MCUBOOT_ENCRYPT_EC256
MCUBOOT_USE_PSA_CRYPTO
...

errors:

	Error[Pe020]: identifier "MBEDTLS_OID_EC_ALG_UNRESTRICTED" is undefined	mcuboot_opensource\boot\bootutil\src\encrypted.c	100
	Error[Pe020]: identifier "MBEDTLS_OID_EC_GRP_SECP256R1" is undefined	mcuboot_opensource\boot\bootutil\src\encrypted.c	101
	Error[Pe020]: identifier "mbedtls_asn1_buf" is undefined	mcuboot_opensource\boot\bootutil\src\encrypted.c	112
	Error[Pe020]: identifier "mbedtls_asn1_buf" is undefined	mcuboot_opensource\boot\bootutil\src\encrypted.c	113
	Error[Pe223]: function "mbedtls_asn1_get_tag" declared implicitly	mcuboot_opensource\boot\bootutil\src\encrypted.c	115
	Error[Pe020]: identifier "MBEDTLS_ASN1_CONSTRUCTED" is undefined	mcuboot_opensource\boot\bootutil\src\encrypted.c	116
	Error[Pe020]: identifier "MBEDTLS_ASN1_SEQUENCE" is undefined	mcuboot_opensource\boot\bootutil\src\encrypted.c	116
	Error[Pe223]: function "mbedtls_asn1_get_int" declared implicitly	mcuboot_opensource\boot\bootutil\src\encrypted.c	125
	Error[Pe223]: function "mbedtls_asn1_get_alg" declared implicitly	mcuboot_opensource\boot\bootutil\src\encrypted.c	129
	Error[Pe223]: function "mbedtls_asn1_get_tag" declared implicitly	mcuboot_opensource\boot\bootutil\src\encrypted.c	142
	Error[Pe020]: identifier "MBEDTLS_ASN1_OCTET_STRING" is undefined	mcuboot_opensource\boot\bootutil\src\encrypted.c	142
	Error[Pe223]: function "mbedtls_asn1_get_tag" declared implicitly	mcuboot_opensource\boot\bootutil\src\encrypted.c	148
	Error[Pe020]: identifier "MBEDTLS_ASN1_CONSTRUCTED" is undefined	mcuboot_opensource\boot\bootutil\src\encrypted.c	149
	Error[Pe020]: identifier "MBEDTLS_ASN1_SEQUENCE" is undefined	mcuboot_opensource\boot\bootutil\src\encrypted.c	149
	Error[Pe223]: function "mbedtls_asn1_get_int" declared implicitly	mcuboot_opensource\boot\bootutil\src\encrypted.c	154
	Error[Pe223]: function "mbedtls_asn1_get_tag" declared implicitly	mcuboot_opensource\boot\bootutil\src\encrypted.c	160
	Error[Pe020]: identifier "MBEDTLS_ASN1_OCTET_STRING" is undefined	mcuboot_opensource\boot\bootutil\src\encrypted.c	160
	Error[Pe020]: identifier "NUM_ECC_BYTES" is undefined	mcuboot_opensource\boot\bootutil\src\encrypted.c	164
	Error[Pe020]: identifier "bootutil_hmac_sha256_context" is undefined	mcuboot_opensource\boot\bootutil\src\encrypted.c	244
	Error[Pe020]: identifier "BOOTUTIL_CRYPTO_SHA256_DIGEST_SIZE" is undefined	mcuboot_opensource\boot\bootutil\src\encrypted.c	245
	Error[Pe223]: function "bootutil_hmac_sha256_init" declared implicitly	mcuboot_opensource\boot\bootutil\src\encrypted.c	262
	Error[Pe223]: function "bootutil_hmac_sha256_set_key" declared implicitly	mcuboot_opensource\boot\bootutil\src\encrypted.c	265
	Error[Pe223]: function "bootutil_hmac_sha256_update" declared implicitly	mcuboot_opensource\boot\bootutil\src\encrypted.c	270
	Error[Pe223]: function "bootutil_hmac_sha256_finish" declared implicitly	mcuboot_opensource\boot\bootutil\src\encrypted.c	275
	Error[Pe223]: function "bootutil_hmac_sha256_drop" declared implicitly	mcuboot_opensource\boot\bootutil\src\encrypted.c	280
	Error[Pe020]: identifier "bootutil_hmac_sha256_context" is undefined	mcuboot_opensource\boot\bootutil\src\encrypted.c	383
	Error[Pe020]: identifier "BOOTUTIL_CRYPTO_SHA256_DIGEST_SIZE" is undefined	mcuboot_opensource\boot\bootutil\src\encrypted.c	385
	Error[Pe020]: identifier "BOOT_ENC_BLOCK_SIZE" is undefined	mcuboot_opensource\boot\bootutil\src\encrypted.c	389
	Error[Pe020]: identifier "bootutil_key_exchange_ctx" is undefined	mcuboot_opensource\boot\bootutil\src\encrypted.c	392
	Error[Pe223]: function "bootutil_ecdh_p256_init" declared implicitly	mcuboot_opensource\boot\bootutil\src\encrypted.c	455
	Error[Pe223]: function "bootutil_ecdh_p256_shared_secret" declared implicitly	mcuboot_opensource\boot\bootutil\src\encrypted.c	457
	Error[Pe223]: function "bootutil_ecdh_p256_drop" declared implicitly	mcuboot_opensource\boot\bootutil\src\encrypted.c	458
	Error[Pe223]: function "bootutil_hmac_sha256_init" declared implicitly	mcuboot_opensource\boot\bootutil\src\encrypted.c	507
	Error[Pe223]: function "bootutil_hmac_sha256_set_key" declared implicitly	mcuboot_opensource\boot\bootutil\src\encrypted.c	512
	Error[Pe223]: function "bootutil_hmac_sha256_drop" declared implicitly	mcuboot_opensource\boot\bootutil\src\encrypted.c	514
	Error[Pe223]: function "bootutil_hmac_sha256_update" declared implicitly	mcuboot_opensource\boot\bootutil\src\encrypted.c	518
	Error[Pe223]: function "bootutil_hmac_sha256_drop" declared implicitly	mcuboot_opensource\boot\bootutil\src\encrypted.c	520
	Error[Pe223]: function "bootutil_hmac_sha256_finish" declared implicitly	mcuboot_opensource\boot\bootutil\src\encrypted.c	525
	Error[Pe223]: function "bootutil_hmac_sha256_drop" declared implicitly	mcuboot_opensource\boot\bootutil\src\encrypted.c	526

The bootutil_hmac_* functions are defined only for Tinycrypt or mbedTLS legacy backend.

If I switch to RSA

...
MCUBOOT_SIGN_RSA
MCUBOOT_SIGN_RSA_LEN 2048
MCUBOOT_ENC_IMAGES
MCUBOOT_ENCRYPT_RSA
MCUBOOT_USE_PSA_CRYPTO
...

It fails with these errors

	Error[Pe020]: identifier "EC_PRIVK_LEN" is undefined	mcuboot_opensource\boot\bootutil\src\encrypted_psa.c	248
	Error[Pe223]: function "parse_priv_enckey" declared implicitly	mcuboot_opensource\boot\bootutil\src\encrypted_psa.c	278
	Error[Pe020]: identifier "ECC_FAMILY" is undefined	mcuboot_opensource\boot\bootutil\src\encrypted_psa.c	284
	Error[Pe020]: identifier "EC_PUBK_INDEX" is undefined	mcuboot_opensource\boot\bootutil\src\encrypted_psa.c	314
	Error[Pe020]: identifier "EC_PUBK_LEN" is undefined	mcuboot_opensource\boot\bootutil\src\encrypted_psa.c	315
	Error[Pe020]: identifier "EC_CIPHERKEY_INDEX" is undefined	mcuboot_opensource\boot\bootutil\src\encrypted_psa.c	374
	Error[Pe020]: identifier "EC_CIPHERKEY_LEN" is undefined	mcuboot_opensource\boot\bootutil\src\encrypted_psa.c	374
	Error[Pe020]: identifier "EC_TAG_INDEX" is undefined	mcuboot_opensource\boot\bootutil\src\encrypted_psa.c	375
	Error[Pe020]: identifier "EC_TAG_LEN" is undefined	mcuboot_opensource\boot\bootutil\src\encrypted_psa.c	376

Since I didn't get an anwer if PSA is supported for last version I rather point out the issue here.