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RT3065: automatically generate a missing EC public key

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When d2i_ECPrivateKey reads a private key with a missing (optional) public key,
generate one automatically from the group and private key.

Reviewed-by: Dr Stephen Henson <steve@openssl.org>
This commit is contained in:
Matt Caswell
2014-08-22 18:04:19 +02:00
committed by Emilia Kasper
parent 0388ac4c99
commit f063e30fe9
2 changed files with 24 additions and 8 deletions
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5
doc/crypto/EC_KEY_new.pod
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@@ -74,6 +74,11 @@ flags currently defined - EC_PKEY_NO_PARAMETERS and EC_PKEY_NO_PUBKEY. These fl
converted into ASN1 in a call to i2d_ECPrivateKey. If EC_PKEY_NO_PARAMETERS is set then the public parameters for the curve are not encoded
along with the private key. If EC_PKEY_NO_PUBKEY is set then the public key is not encoded along with the private key.
When reading a private key encoded with EC_PKEY_NO_PUBKEY,
d2i_ECPrivateKey generates the missing public key
automatically. Private keys encoded with EC_PKEY_NO_PARAMETERS cannot
be loaded using d2i_ECPrivateKey.
The functions EC_KEY_get_conv_form and EC_KEY_set_conv_form get and set the point_conversion_form for the B<key>. For a description
of point_conversion_forms please refer to L<EC_POINT_new(3)|EC_POINT_new(3)>.