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author | Matt Caswell <matt@openssl.org> | 2015-02-10 15:45:56 +0000 |
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committer | Matt Caswell <matt@openssl.org> | 2015-02-25 17:13:14 +0000 |
commit | 93b83d0626e73bb09559ce85aefa418ac7318d59 (patch) | |
tree | 757d8315e0577e00e8690f1a33cb06d8394c6540 /doc | |
parent | 9e442d485008046933cdc7da65080f436a4af089 (diff) | |
download | openssl-93b83d0626e73bb09559ce85aefa418ac7318d59.tar.gz |
Provide documentation for i2d_ECPrivateKey and d2i_ECPrivateKey
Reviewed-by: Emilia Käsper <emilia@openssl.org>
Diffstat (limited to 'doc')
-rw-r--r-- | doc/crypto/EC_KEY_new.pod | 22 | ||||
-rw-r--r-- | doc/crypto/EC_POINT_new.pod | 9 | ||||
-rw-r--r-- | doc/crypto/d2i_ECPrivateKey.pod | 67 |
3 files changed, 79 insertions, 19 deletions
diff --git a/doc/crypto/EC_KEY_new.pod b/doc/crypto/EC_KEY_new.pod index 2027569f44..e859689bcb 100644 --- a/doc/crypto/EC_KEY_new.pod +++ b/doc/crypto/EC_KEY_new.pod @@ -24,8 +24,6 @@ EC_KEY_new, EC_KEY_get_flags, EC_KEY_set_flags, EC_KEY_clear_flags, EC_KEY_new_b int EC_KEY_set_private_key(EC_KEY *key, const BIGNUM *prv); const EC_POINT *EC_KEY_get0_public_key(const EC_KEY *key); int EC_KEY_set_public_key(EC_KEY *key, const EC_POINT *pub); - unsigned int EC_KEY_get_enc_flags(const EC_KEY *key); - void EC_KEY_set_enc_flags(EC_KEY *eckey, unsigned int flags); point_conversion_form_t EC_KEY_get_conv_form(const EC_KEY *key); void EC_KEY_set_conv_form(EC_KEY *eckey, point_conversion_form_t cform); void *EC_KEY_get_key_method_data(EC_KEY *key, @@ -69,16 +67,6 @@ on the key to confirm that it is valid. The functions EC_KEY_get0_group, EC_KEY_set_group, EC_KEY_get0_private_key, EC_KEY_set_private_key, EC_KEY_get0_public_key, and EC_KEY_set_public_key get and set the EC_GROUP object, the private key and the EC_POINT public key for the B<key> respectively. -The functions EC_KEY_get_enc_flags and EC_KEY_set_enc_flags get and set the value of the encoding flags for the B<key>. There are two encoding -flags currently defined - EC_PKEY_NO_PARAMETERS and EC_PKEY_NO_PUBKEY. These flags define the behaviour of how the B<key> is -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)>. @@ -106,15 +94,15 @@ EC_KEY_get0_group returns the EC_GROUP associated with the EC_KEY. EC_KEY_get0_private_key returns the private key associated with the EC_KEY. -EC_KEY_get_enc_flags returns the value of the current encoding flags for the EC_KEY. - EC_KEY_get_conv_form return the point_conversion_form for the EC_KEY. =head1 SEE ALSO -L<crypto(3)|crypto(3)>, L<ec(3)|ec(3)>, L<EC_GROUP_new(3)|EC_GROUP_new(3)>, L<EC_GROUP_copy(3)|EC_GROUP_copy(3)>, -L<EC_POINT_new(3)|EC_POINT_new(3)>, L<EC_POINT_add(3)|EC_POINT_add(3)>, -L<EC_GFp_simple_method(3)|EC_GFp_simple_method(3)>, L<d2i_ECPKParameters(3)|d2i_ECPKParameters(3)> +L<crypto(3)|crypto(3)>, L<ec(3)|ec(3)>, L<EC_GROUP_new(3)|EC_GROUP_new(3)>, +L<EC_GROUP_copy(3)|EC_GROUP_copy(3)>, L<EC_POINT_new(3)|EC_POINT_new(3)>, +L<EC_POINT_add(3)|EC_POINT_add(3)>, +L<EC_GFp_simple_method(3)|EC_GFp_simple_method(3)>, +L<d2i_ECPKParameters(3)|d2i_ECPKParameters(3)> =cut diff --git a/doc/crypto/EC_POINT_new.pod b/doc/crypto/EC_POINT_new.pod index 69eb0d1a09..858baf4244 100644 --- a/doc/crypto/EC_POINT_new.pod +++ b/doc/crypto/EC_POINT_new.pod @@ -81,8 +81,13 @@ on the curve there will only ever be two possible values for y. Therefore a poin and EC_POINT_set_compressed_coordinates_GF2m functions where B<x> is the x co-ordinate and B<y_bit> is a value 0 or 1 to identify which of the two possible values for y should be used. -In addition EC_POINTs can be converted to and from various external representations. Supported representations are octet strings, BIGNUMs and hexadecimal. The format of the external representation is described by the point_conversion_form. See L<EC_GROUP_copy(3)|EC_GROUP_copy(3)> for -a description of point_conversion_form. Octet strings are stored in a buffer along with an associated buffer length. A point held in a BIGNUM is calculated by converting the point to an octet string and then converting that octet string into a BIGNUM integer. Points in hexadecimal format are stored in a NULL terminated character string where each character is one of the printable values 0-9 or A-F (or a-f). +In addition EC_POINTs can be converted to and from various external +representations. Supported representations are octet strings, BIGNUMs and +hexadecimal. Octet strings are stored in a buffer along with an associated +buffer length. A point held in a BIGNUM is calculated by converting the point to +an octet string and then converting that octet string into a BIGNUM integer. +Points in hexadecimal format are stored in a NULL terminated character string +where each character is one of the printable values 0-9 or A-F (or a-f). The functions EC_POINT_point2oct, EC_POINT_oct2point, EC_POINT_point2bn, EC_POINT_bn2point, EC_POINT_point2hex and EC_POINT_hex2point convert from and to EC_POINTs for the formats: octet string, BIGNUM and hexadecimal respectively. diff --git a/doc/crypto/d2i_ECPrivateKey.pod b/doc/crypto/d2i_ECPrivateKey.pod new file mode 100644 index 0000000000..928c6fb78c --- /dev/null +++ b/doc/crypto/d2i_ECPrivateKey.pod @@ -0,0 +1,67 @@ +=pod + +=head1 NAME + +i2d_ECPrivateKey, d2i_ECPrivate_key - Encode and decode functions for saving and +reading EC_KEY structures + +=head1 SYNOPSIS + + #include <openssl/ec.h> + + EC_KEY *d2i_ECPrivateKey(EC_KEY **key, const unsigned char **in, long len); + int i2d_ECPrivateKey(EC_KEY *key, unsigned char **out); + + unsigned int EC_KEY_get_enc_flags(const EC_KEY *key); + void EC_KEY_set_enc_flags(EC_KEY *eckey, unsigned int flags); + +=head1 DESCRIPTION + +The ECPrivateKey encode and decode routines encode and parse an +B<EC_KEY> structure into a binary format (ASN.1 DER) and back again. + +These functions are similar to the d2i_X509() functions, and you should refer to +that page for a detailed description (see L<d2i_X509(3)|d2i_X509(3)>). + +The format of the external representation of the public key written by +i2d_ECPrivateKey (such as whether it is stored in a compressed form or not) is +described by the point_conversion_form. See L<EC_GROUP_copy(3)|EC_GROUP_copy(3)> +for a description of point_conversion_form. + +When reading a private key encoded without an associated public key (e.g. if +EC_PKEY_NO_PUBKEY has been used - see below), then d2i_ECPrivateKey generates +the missing public key automatically. Private keys encoded without parameters +(e.g. if EC_PKEY_NO_PARAMETERS has been used - see below) then the key cannot be +loaded using d2i_ECPrivateKey. + +The functions EC_KEY_get_enc_flags and EC_KEY_set_enc_flags get and set the +value of the encoding flags for the B<key>. There are two encoding flags +currently defined - EC_PKEY_NO_PARAMETERS and EC_PKEY_NO_PUBKEY. These flags +define the behaviour of how the B<key> is 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. + +=head1 RETURN VALUES + +d2i_ECPrivateKey() returns a valid B<EC_KEY> structure or B<NULL> if an error +occurs. The error code that can be obtained by +L<ERR_get_error(3)|ERR_get_error(3)>. + +i2d_ECPrivateKey() returns the number of bytes successfully encoded or a +negative value if an error occurs. The error code can be obtained by +L<ERR_get_error(3)|ERR_get_error(3)>. + +EC_KEY_get_enc_flags returns the value of the current encoding flags for the +EC_KEY. + +=head1 SEE ALSO + +L<crypto(3)|crypto(3)>, L<ec(3)|ec(3)>, L<EC_GROUP_new(3)|EC_GROUP_new(3)>, +L<EC_GROUP_copy(3)|EC_GROUP_copy(3)>, L<EC_POINT_new(3)|EC_POINT_new(3)>, +L<EC_POINT_add(3)|EC_POINT_add(3)>, +L<EC_GFp_simple_method(3)|EC_GFp_simple_method(3)>, +L<d2i_ECPKParameters(3)|d2i_ECPKParameters(3)>, +L<d2i_ECPrivateKey(3)|d2i_ECPrivateKey(3)> + +=cut |