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Niels Möller authored
* ecc-ecdsa-verify.c (ecc_ecdsa_verify): Use ecc_nonsec_add_jjj, to produce correct result in a corner case where point addition needs to use point duplication. Also use ecc_j_to_a rather than ecc->h_to_a, since ecdsa supports only weierstrass curves. * ecc-gostdsa-verify.c (ecc_gostdsa_verify): Analogous change. * testsuite/ecdsa-verify-test.c (test_main): Add corresponding test. * testsuite/ecdsa-sign-test.c (test_main): And a test producing the problematic signature.
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