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pk_write test cases with short/long private key

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Add pk_write test cases where the ASN.1 INTEGER encoding of the
private value would not have the mandatory size for the OCTET STRING
that contains the value.

ec_256_long_prv.pem is a random secp256r1 private key, selected so
that the private value is >= 2^255, i.e. the top bit of the first byte
is set (which would cause the INTEGER encoding to have an extra
leading 0 byte).

ec_521_short_prv.pem is a random secp521r1 private key, selected so
that the private value is < 2^519, i.e. the first byte is 0 and the
top bit of the second byte is 0 (which would cause the INTEGER
encoding to have one less 0 byte at the start).
This commit is contained in:
Gilles Peskine 2018-08-11 00:42:21 +02:00
parent 6c34268e20
commit e082c18389
3 changed files with 20 additions and 0 deletions
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5
tests/data_files/ec_256_long_prv.pem Normal file
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@ -0,0 +1,5 @@
-----BEGIN EC PRIVATE KEY-----
MHcCAQEEIIcex4mqXsQamUKTVf8vXmTAJrQvGjh5mXG8p9+OR4xAoAoGCCqGSM49
AwEHoUQDQgAEqJ2HQjPpc6fDwE/vSa6U35USXawkTo98y4U6NsAl+rOGuqMPEFXf
P1Srm/Jrzwa/RuppRL5kgyAsGJTUmwZEzQ==
-----END EC PRIVATE KEY-----

7
tests/data_files/ec_521_short_prv.pem Normal file
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@ -0,0 +1,7 @@
-----BEGIN EC PRIVATE KEY-----
MIHcAgEBBEIAOXdk7W+Hf5L7Hc9fKe44wmpaRNs5ERFTkv5CrlXv/Bu3y28M673q
vBNo7a/UE/6NNQHu2pQODEYFpMg6R34b5SigBwYFK4EEACOhgYkDgYYABAFUMHXV
KPA4vkMgq+pFgDoH96XoM517gF2GJFV6h2gLhykzIHL/otAyEpAStw7MBvbU0V21
ixB+hjqzO7Snxaj9mwB8g87OKxm5eGfsqvJNPdJ0RZ/EKy06Ukg6KThlhQeyrtIk
g5PTCrPnNszlffAy6/jCOe3Moi59g15H13sSzwfX6g==
-----END EC PRIVATE KEY-----

8
tests/suites/test_suite_pkwrite.data
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@ -30,10 +30,18 @@ Private key write check EC 192 bits
depends_on:MBEDTLS_ECP_C:MBEDTLS_BASE64_C:MBEDTLS_ECP_DP_SECP192R1_ENABLED
pk_write_key_check:"data_files/ec_prv.sec1.pem"
Private key write check EC 256 bits (top bit set)
depends_on:MBEDTLS_ECP_C:MBEDTLS_BASE64_C:MBEDTLS_ECP_DP_SECP192R1_ENABLED
pk_write_key_check:"data_files/ec_256_long_prv.pem"
Private key write check EC 521 bits
depends_on:MBEDTLS_ECP_C:MBEDTLS_BASE64_C:MBEDTLS_ECP_DP_SECP521R1_ENABLED
pk_write_key_check:"data_files/ec_521_prv.pem"
Private key write check EC 521 bits (top byte is 0)
depends_on:MBEDTLS_ECP_C:MBEDTLS_BASE64_C:MBEDTLS_ECP_DP_SECP521R1_ENABLED
pk_write_key_check:"data_files/ec_521_short_prv.pem"
Private key write check EC Brainpool 512 bits
depends_on:MBEDTLS_ECP_C:MBEDTLS_BASE64_C:MBEDTLS_ECP_DP_BP512R1_ENABLED
pk_write_key_check:"data_files/ec_bp512_prv.pem"