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Merge pull request #3730 from gilles-peskine-arm/psa_generate_key-curve25519

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Fix psa_generate_key on Curve25519
This commit is contained in:
Ronald Cron 2020-10-21 09:03:00 +02:00 committed by GitHub
commit 60ca77ca75
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GPG Key ID: 4AEE18F83AFDEB23
5 changed files with 24 additions and 3 deletions
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5
ChangeLog.d/ecp_curve_list.txt Normal file
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@ -0,0 +1,5 @@
Bugfix
* mbedtls_ecp_curve_list() now lists Curve25519 and Curve448 under the names
"x25519" and "x448". These curves support ECDH but not ECDSA. If you need
only the curves that support ECDSA, filter the list with
mbedtls_ecdsa_can_do().

3
ChangeLog.d/psa_generate_key-curve25519.txt Normal file
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@ -0,0 +1,3 @@
Bugfix
* Fix psa_generate_key() returning an error when asked to generate
an ECC key pair on Curve25519 or secp244k1.

5
library/ecp.c
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@ -546,8 +546,11 @@ static const mbedtls_ecp_curve_info ecp_supported_curves[] =
#if defined(MBEDTLS_ECP_DP_SECP192K1_ENABLED)
{ MBEDTLS_ECP_DP_SECP192K1, 18, 192, "secp192k1" },
#endif
#if defined(MBEDTLS_ECP_DP_CURVE25519_ENABLED) && defined(MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED)
#if defined(MBEDTLS_ECP_DP_CURVE25519_ENABLED)
{ MBEDTLS_ECP_DP_CURVE25519, 29, 256, "x25519" },
#endif
#if defined(MBEDTLS_ECP_DP_CURVE448_ENABLED)
{ MBEDTLS_ECP_DP_CURVE448, 30, 448, "x448" },
#endif
{ MBEDTLS_ECP_DP_NONE, 0, 0, NULL },
};

2
library/psa_crypto.c
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@ -6109,8 +6109,6 @@ static psa_status_t psa_generate_key_internal(
return( PSA_ERROR_NOT_SUPPORTED );
if( grp_id == MBEDTLS_ECP_DP_NONE || curve_info == NULL )
return( PSA_ERROR_NOT_SUPPORTED );
if( curve_info->bit_size != bits )
return( PSA_ERROR_INVALID_ARGUMENT );
mbedtls_ecp_keypair_init( &ecp );
ret = mbedtls_ecp_gen_key( grp_id, &ecp,
mbedtls_ctr_drbg_random,

12
tests/suites/test_suite_psa_crypto.data
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@ -2549,6 +2549,14 @@ PSA raw key agreement: ECDH brainpoolP512r1 (RFC 7027)
depends_on:MBEDTLS_PK_PARSE_C:MBEDTLS_ECP_C:MBEDTLS_ECP_DP_BP512R1_ENABLED:MBEDTLS_ECDH_C
raw_key_agreement:PSA_ALG_ECDH:PSA_KEY_TYPE_ECC_KEY_PAIR(PSA_ECC_FAMILY_BRAINPOOL_P_R1):"16302ff0dbbb5a8d733dab7141c1b45acbc8715939677f6a56850a38bd87bd59b09e80279609ff333eb9d4c061231fb26f92eeb04982a5f1d1764cad57665422":"049d45f66de5d67e2e6db6e93a59ce0bb48106097ff78a081de781cdb31fce8ccbaaea8dd4320c4119f1e9cd437a2eab3731fa9668ab268d871deda55a5473199f2fdc313095bcdd5fb3a91636f07a959c8e86b5636a1e930e8396049cb481961d365cc11453a06c719835475b12cb52fc3c383bce35e27ef194512b71876285fa":"a7927098655f1f9976fa50a9d566865dc530331846381c87256baf3226244b76d36403c024d7bbf0aa0803eaff405d3d24f11a9b5c0bef679fe1454b21c4cd1f"
PSA raw key agreement: X25519 (RFC 7748: Alice)
depends_on:MBEDTLS_ECP_C:MBEDTLS_ECP_DP_CURVE25519_ENABLED:MBEDTLS_ECDH_C
raw_key_agreement:PSA_ALG_ECDH:PSA_KEY_TYPE_ECC_KEY_PAIR(PSA_ECC_FAMILY_MONTGOMERY):"77076d0a7318a57d3c16c17251b26645df4c2f87ebc0992ab177fba51db92c2a":"de9edb7d7b7dc1b4d35b61c2ece435373f8343c85b78674dadfc7e146f882b4f":"4a5d9d5ba4ce2de1728e3bf480350f25e07e21c947d19e3376f09b3c1e161742"
PSA raw key agreement: X25519 (RFC 7748: Bob)
depends_on:MBEDTLS_ECP_C:MBEDTLS_ECP_DP_CURVE25519_ENABLED:MBEDTLS_ECDH_C
raw_key_agreement:PSA_ALG_ECDH:PSA_KEY_TYPE_ECC_KEY_PAIR(PSA_ECC_FAMILY_MONTGOMERY):"5dab087e624a8a4b79e17f8b83800ee66f3bb1292618b6fd1c2f8b27ff88e0eb":"8520f0098930a754748b7ddcb43ef75a0dbf3a0d26381af4eba4a98eaa9b4e6a":"4a5d9d5ba4ce2de1728e3bf480350f25e07e21c947d19e3376f09b3c1e161742"
PSA key agreement: ECDH SECP256R1 (RFC 5903) + HKDF-SHA-256: capacity=8160
depends_on:MBEDTLS_PK_PARSE_C:MBEDTLS_ECP_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECDH_C:MBEDTLS_SHA256_C
key_agreement_capacity:PSA_ALG_KEY_AGREEMENT(PSA_ALG_ECDH, PSA_ALG_HKDF(PSA_ALG_SHA_256)):PSA_KEY_TYPE_ECC_KEY_PAIR(PSA_ECC_FAMILY_SECP_R1):"c88f01f510d9ac3f70a292daa2316de544e9aab8afe84049c62a9c57862d1433":"04d12dfb5289c8d4f81208b70270398c342296970a0bccb74c736fc7554494bf6356fbf3ca366cc23e8157854c13c58d6aac23f046ada30f8353e74f33039872ab":8160
@ -2710,6 +2718,10 @@ depends_on:MBEDTLS_ECP_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECDSA_C
# doesn't fully relate the curve with its size.
generate_key:PSA_KEY_TYPE_ECC_KEY_PAIR(PSA_ECC_FAMILY_SECP_R1):128:PSA_KEY_USAGE_EXPORT | PSA_KEY_USAGE_SIGN_HASH | PSA_KEY_USAGE_VERIFY_HASH:PSA_ALG_ECDSA_ANY:PSA_ERROR_NOT_SUPPORTED
PSA generate key: ECC, Curve25519, good
depends_on:MBEDTLS_ECP_C:MBEDTLS_ECP_DP_CURVE25519_ENABLED:MBEDTLS_ECDH_C
generate_key:PSA_KEY_TYPE_ECC_KEY_PAIR(PSA_ECC_FAMILY_MONTGOMERY):255:PSA_KEY_USAGE_EXPORT | PSA_KEY_USAGE_DERIVE:PSA_ALG_ECDH:PSA_SUCCESS
PSA generate key: RSA, default e
generate_key_rsa:512:"":PSA_SUCCESS