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Merge pull request #9495 from minosgalanakis/doc/add_mbedtls_ecp_check_privkey_comment_bp36

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[Backport 3.6] Refactored a minor check in ecp check privkey
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Janos Follath 2025-01-24 09:44:39 +00:00 committed by GitHub
commit 79d5ea234c
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library/ecp.c
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@ -3056,7 +3056,7 @@ int mbedtls_ecp_check_privkey(const mbedtls_ecp_group *grp,
/* see RFC 7748 sec. 5 para. 5 */ /* see RFC 7748 sec. 5 para. 5 */
if (mbedtls_mpi_get_bit(d, 0) != 0 || if (mbedtls_mpi_get_bit(d, 0) != 0 ||
mbedtls_mpi_get_bit(d, 1) != 0 || mbedtls_mpi_get_bit(d, 1) != 0 ||
mbedtls_mpi_bitlen(d) - 1 != grp->nbits) { /* mbedtls_mpi_bitlen is one-based! */ mbedtls_mpi_bitlen(d) != grp->nbits + 1) { /* mbedtls_mpi_bitlen is one-based! */
return MBEDTLS_ERR_ECP_INVALID_KEY; return MBEDTLS_ERR_ECP_INVALID_KEY;
} }