Implement and test mbedtls_ecp_write_key
mbedtls_ecp_write_key is a mirror function to mbedtls_ecp_read_key, which
writes a private key back into a byte buffer in the correct format.
This is a helpful convenience function, since the byte order is defined
differently between Montgomery and Weierstrass curves. Since this difference
is accounted for in mbedtls_ecp_read_key, it made sense to add
mbedtls_ecp_write_key for the purpose of abstracting this away such that
psa_export_key doesn't need to take byte order into account.
Signed-off-by: Steven Cooreman <steven.cooreman@silabs.com>
diff --git a/tests/suites/test_suite_ecp.data b/tests/suites/test_suite_ecp.data
index 9219179..c180d37 100644
--- a/tests/suites/test_suite_ecp.data
+++ b/tests/suites/test_suite_ecp.data
@@ -278,65 +278,69 @@
ECP read key #1 (short weierstrass, too small)
depends_on:MBEDTLS_ECP_DP_SECP192R1_ENABLED
-mbedtls_ecp_read_key:MBEDTLS_ECP_DP_SECP192R1:"00":MBEDTLS_ERR_ECP_INVALID_KEY
+mbedtls_ecp_read_key:MBEDTLS_ECP_DP_SECP192R1:"00":MBEDTLS_ERR_ECP_INVALID_KEY:0
ECP read key #2 (short weierstrass, smallest)
depends_on:MBEDTLS_ECP_DP_SECP192R1_ENABLED
-mbedtls_ecp_read_key:MBEDTLS_ECP_DP_SECP192R1:"01":0
+mbedtls_ecp_read_key:MBEDTLS_ECP_DP_SECP192R1:"01":0:1
ECP read key #3 (short weierstrass, biggest)
depends_on:MBEDTLS_ECP_DP_SECP192R1_ENABLED
-mbedtls_ecp_read_key:MBEDTLS_ECP_DP_SECP192R1:"FFFFFFFFFFFFFFFFFFFFFFFF99DEF836146BC9B1B4D22830":0
+mbedtls_ecp_read_key:MBEDTLS_ECP_DP_SECP192R1:"FFFFFFFFFFFFFFFFFFFFFFFF99DEF836146BC9B1B4D22830":0:1
ECP read key #4 (short weierstrass, too big)
depends_on:MBEDTLS_ECP_DP_SECP192R1_ENABLED
-mbedtls_ecp_read_key:MBEDTLS_ECP_DP_SECP192R1:"FFFFFFFFFFFFFFFFFFFFFFFF99DEF836146BC9B1B4D22831":MBEDTLS_ERR_ECP_INVALID_KEY
+mbedtls_ecp_read_key:MBEDTLS_ECP_DP_SECP192R1:"FFFFFFFFFFFFFFFFFFFFFFFF99DEF836146BC9B1B4D22831":MBEDTLS_ERR_ECP_INVALID_KEY:0
ECP read key #5 (Curve25519, most significant bit set)
depends_on:MBEDTLS_ECP_DP_CURVE25519_ENABLED
-mbedtls_ecp_read_key:MBEDTLS_ECP_DP_CURVE25519:"000000000000000000000000000000000000000000000000000000000000000C":0
+mbedtls_ecp_read_key:MBEDTLS_ECP_DP_CURVE25519:"000000000000000000000000000000000000000000000000000000000000000C":0:0
ECP read key #6 (Curve25519, second most significant bit unset)
depends_on:MBEDTLS_ECP_DP_CURVE25519_ENABLED
-mbedtls_ecp_read_key:MBEDTLS_ECP_DP_CURVE25519:"0FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF3":0
+mbedtls_ecp_read_key:MBEDTLS_ECP_DP_CURVE25519:"0FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF3":0:0
ECP read key #7 (Curve25519, msb OK)
depends_on:MBEDTLS_ECP_DP_CURVE25519_ENABLED
-mbedtls_ecp_read_key:MBEDTLS_ECP_DP_CURVE25519:"0000000000000000000000000000000000000000000000000000000000000004":0
+mbedtls_ecp_read_key:MBEDTLS_ECP_DP_CURVE25519:"0000000000000000000000000000000000000000000000000000000000000004":0:1
ECP read key #8 (Curve25519, bit 0 set)
depends_on:MBEDTLS_ECP_DP_CURVE25519_ENABLED
-mbedtls_ecp_read_key:MBEDTLS_ECP_DP_CURVE25519:"1000000000000000000000000000000000000000000000000000000000000000":0
+mbedtls_ecp_read_key:MBEDTLS_ECP_DP_CURVE25519:"1000000000000000000000000000000000000000000000000000000000000000":0:0
ECP read key #9 (Curve25519, bit 1 set)
depends_on:MBEDTLS_ECP_DP_CURVE25519_ENABLED
-mbedtls_ecp_read_key:MBEDTLS_ECP_DP_CURVE25519:"2000000000000000000000000000000000000000000000000000000000000004":0
+mbedtls_ecp_read_key:MBEDTLS_ECP_DP_CURVE25519:"2000000000000000000000000000000000000000000000000000000000000004":0:0
ECP read key #10 (Curve25519, bit 2 set)
depends_on:MBEDTLS_ECP_DP_CURVE25519_ENABLED
-mbedtls_ecp_read_key:MBEDTLS_ECP_DP_CURVE25519:"4000000000000000000000000000000000000000000000000000000000000004":0
+mbedtls_ecp_read_key:MBEDTLS_ECP_DP_CURVE25519:"4000000000000000000000000000000000000000000000000000000000000004":0:0
ECP read key #11 (Curve25519, OK)
depends_on:MBEDTLS_ECP_DP_CURVE25519_ENABLED
-mbedtls_ecp_read_key:MBEDTLS_ECP_DP_CURVE25519:"8FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7":0
+mbedtls_ecp_read_key:MBEDTLS_ECP_DP_CURVE25519:"8FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7":0:1
ECP read key #12 (Curve25519, too long)
depends_on:MBEDTLS_ECP_DP_CURVE25519_ENABLED
-mbedtls_ecp_read_key:MBEDTLS_ECP_DP_CURVE25519:"00000000000000000000000000000000000000000000000000000000000000000C":MBEDTLS_ERR_ECP_INVALID_KEY
+mbedtls_ecp_read_key:MBEDTLS_ECP_DP_CURVE25519:"00000000000000000000000000000000000000000000000000000000000000000C":MBEDTLS_ERR_ECP_INVALID_KEY:0
ECP read key #13 (Curve25519, not long enough)
depends_on:MBEDTLS_ECP_DP_CURVE25519_ENABLED
-mbedtls_ecp_read_key:MBEDTLS_ECP_DP_CURVE25519:"0FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF3":MBEDTLS_ERR_ECP_INVALID_KEY
+mbedtls_ecp_read_key:MBEDTLS_ECP_DP_CURVE25519:"0FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF3":MBEDTLS_ERR_ECP_INVALID_KEY:0
ECP read key #14 (Curve448, not supported)
-mbedtls_ecp_read_key:MBEDTLS_ECP_DP_CURVE448:"FCFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF":MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE
+mbedtls_ecp_read_key:MBEDTLS_ECP_DP_CURVE448:"FCFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF":MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE:0
ECP read key #15 (Curve25519, not supported)
depends_on:!MBEDTLS_ECP_DP_CURVE25519_ENABLED
-mbedtls_ecp_read_key:MBEDTLS_ECP_DP_CURVE25519:"8FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7":MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE
+mbedtls_ecp_read_key:MBEDTLS_ECP_DP_CURVE25519:"8FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7":MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE:0
ECP read key #15 (invalid curve)
-mbedtls_ecp_read_key:INT_MAX:"8FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7":MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE
+mbedtls_ecp_read_key:INT_MAX:"8FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7":MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE:0
+
+ECP read key #16 (Curve25519 RFC, OK)
+depends_on:MBEDTLS_ECP_DP_CURVE25519_ENABLED
+mbedtls_ecp_read_key:MBEDTLS_ECP_DP_CURVE25519:"70076d0a7318a57d3c16c17251b26645df4c2f87ebc0992ab177fba51db92c6a":0:1
ECP mod p192 small (more than 192 bits, less limbs than 2 * 192 bits)
depends_on:MBEDTLS_ECP_DP_SECP192R1_ENABLED