The PSA Crypto API uses 0 as the initial counter value, but the test vector
in RFC 7539 uses 1. So the unit tests here include an extra leading block.
The expected data for this leading block was calculated with Cryptodome.
#!/usr/bin/env python3
import re
from Cryptodome.Cipher import ChaCha20
key = bytes.fromhex('000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f')
nonce = bytes.fromhex('000000000000004a00000000')
encrypt = lambda pt: ChaCha20.new(key=key, nonce=nonce).encrypt(pt)
# Cryptodome uses counter=0, like PSA Crypto. Prepend a 64-byte input block #0
# so that the plaintext from RFC 7539 starts exactly at block #1.
header = b'The RFC 7539 test vector uses counter=1, but PSA uses counter=0.'
assert(len(header) == 64)
sunscreen = b"Ladies and Gentlemen of the class of '99: If I could offer you only one tip for the future, sunscreen would be it."
plaintext = header + sunscreen
zeros = b'\x00' * len(plaintext)
keystream = encrypt(zeros)
ciphertext = encrypt(plaintext)
print('RFC 7539 §2.4.2')
print('Keystream:')
print(re.sub(r'(..)', r'\1:', keystream[64:].hex()))
print('Ciphertext Subscreen:')
print(re.sub(r'(..)', r'\1 ', ciphertext[64:].hex()))
print('')
print(f"""\
PSA symmetric decrypt: ChaCha20, RFC7539 keystream
depends_on:PSA_WANT_ALG_STREAM_CIPHER:PSA_WANT_KEY_TYPE_CHACHA20
# Keystream from RFC 7539 §2.4.2, with an extra 64-byte output block prepended
# because the test vector starts at counter=1 but our API starts at counter=0.
cipher_decrypt:PSA_ALG_STREAM_CIPHER:PSA_KEY_TYPE_CHACHA20:"{key.hex()}":"{nonce.hex()}":"{zeros.hex()}":"{keystream.hex()}"
PSA symmetric decrypt: ChaCha20, RFC7539 sunscreen
depends_on:PSA_WANT_ALG_STREAM_CIPHER:PSA_WANT_KEY_TYPE_CHACHA20
# Test vector from RFC 7539 §2.4.2, with an extra 64-byte block prepended
# because the test vector starts at counter=1 but our API starts at counter=0.
cipher_decrypt:PSA_ALG_STREAM_CIPHER:PSA_KEY_TYPE_CHACHA20:"{key.hex()}":"{nonce.hex()}":"{ciphertext.hex()}":"{plaintext.hex()}"
""")
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
The test is based on the AEAD multi-part test, re-using the
design on aead_multipart_internal_func() to test differnet
sequence of psa_mac_update() for MAC update or verify.
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Make `PSA symetric decrypt: CCM*-no-tag, input too short (15 bytes)`
depend on MBEDTLS_CCM_C otherwise the multi-part test fails on
the missing CCM* instead on the input length validity for CCM*.
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Add accessors to mbedtls_ssl_context: user data, version
ABI-API-checking fails which was expected as this PR adds a new field in mbedtls_ssl_context and mbedtls_ssl_config.
The user data is typically a pointer to a data structure or a handle which
may no longer be valid after the session is restored. If the user data needs
to be preserved, let the application do it. This way, it is a conscious
decision for the application to save/restore either the pointer/handle
itself or the object it refers to.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit alters the relevant .data files
such that the new function name change of check_iv
to iv_len_validity is relfected there.
Signed-off-by: Thomas Daubney <thomas.daubney@arm.com>
Commit changes name of check_iv to
iv_len_validity as this seems to better describe
its functionality.
Signed-off-by: Thomas Daubney <thomas.daubney@arm.com>
Duplicate a test case but with a different expected error
due to error translation to and from PSA.
Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
