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diff --git a/man/fido_cred_new.3 b/man/fido_cred_new.3 new file mode 100644 index 0000000..4f8b1be --- /dev/null +++ b/man/fido_cred_new.3 @@ -0,0 +1,316 @@ +.\" Copyright (c) 2018-2021 Yubico AB. All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions are +.\" met: +.\" +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in +.\" the documentation and/or other materials provided with the +.\" distribution. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +.\" "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +.\" LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +.\" A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +.\" HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +.\" SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +.\" LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +.\" OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +.\" +.\" SPDX-License-Identifier: BSD-2-Clause +.\" +.Dd $Mdocdate: May 23 2018 $ +.Dt FIDO_CRED_NEW 3 +.Os +.Sh NAME +.Nm fido_cred_new , +.Nm fido_cred_free , +.Nm fido_cred_pin_minlen , +.Nm fido_cred_prot , +.Nm fido_cred_fmt , +.Nm fido_cred_rp_id , +.Nm fido_cred_rp_name , +.Nm fido_cred_user_name , +.Nm fido_cred_display_name , +.Nm fido_cred_authdata_ptr , +.Nm fido_cred_authdata_raw_ptr , +.Nm fido_cred_clientdata_hash_ptr , +.Nm fido_cred_id_ptr , +.Nm fido_cred_aaguid_ptr , +.Nm fido_cred_largeblob_key_ptr , +.Nm fido_cred_pubkey_ptr , +.Nm fido_cred_sig_ptr , +.Nm fido_cred_user_id_ptr , +.Nm fido_cred_x5c_ptr , +.Nm fido_cred_attstmt_ptr , +.Nm fido_cred_authdata_len , +.Nm fido_cred_authdata_raw_len , +.Nm fido_cred_clientdata_hash_len , +.Nm fido_cred_id_len , +.Nm fido_cred_aaguid_len , +.Nm fido_cred_largeblob_key_len , +.Nm fido_cred_pubkey_len , +.Nm fido_cred_sig_len , +.Nm fido_cred_user_id_len , +.Nm fido_cred_x5c_len , +.Nm fido_cred_attstmt_len , +.Nm fido_cred_type , +.Nm fido_cred_flags , +.Nm fido_cred_sigcount +.Nd FIDO2 credential API +.Sh SYNOPSIS +.In fido.h +.Ft fido_cred_t * +.Fn fido_cred_new "void" +.Ft void +.Fn fido_cred_free "fido_cred_t **cred_p" +.Ft size_t +.Fn fido_cred_pin_minlen "const fido_cred_t *cred" +.Ft int +.Fn fido_cred_prot "const fido_cred_t *cred" +.Ft const char * +.Fn fido_cred_fmt "const fido_cred_t *cred" +.Ft const char * +.Fn fido_cred_rp_id "const fido_cred_t *cred" +.Ft const char * +.Fn fido_cred_rp_name "const fido_cred_t *cred" +.Ft const char * +.Fn fido_cred_user_name "const fido_cred_t *cred" +.Ft const char * +.Fn fido_cred_display_name "const fido_cred_t *cred" +.Ft const unsigned char * +.Fn fido_cred_authdata_ptr "const fido_cred_t *cred" +.Ft const unsigned char * +.Fn fido_cred_authdata_raw_ptr "const fido_cred_t *cred" +.Ft const unsigned char * +.Fn fido_cred_clientdata_hash_ptr "const fido_cred_t *cred" +.Ft const unsigned char * +.Fn fido_cred_id_ptr "const fido_cred_t *cred" +.Ft const unsigned char * +.Fn fido_cred_aaguid_ptr "const fido_cred_t *cred" +.Ft const unsigned char * +.Fn fido_cred_largeblob_key_ptr "const fido_cred_t *cred" +.Ft const unsigned char * +.Fn fido_cred_pubkey_ptr "const fido_cred_t *cred" +.Ft const unsigned char * +.Fn fido_cred_sig_ptr "const fido_cred_t *cred" +.Ft const unsigned char * +.Fn fido_cred_user_id_ptr "const fido_cred_t *cred" +.Ft const unsigned char * +.Fn fido_cred_x5c_ptr "const fido_cred_t *cred" +.Ft const unsigned char * +.Fn fido_cred_attstmt_ptr "const fido_cred_t *cred" +.Ft size_t +.Fn fido_cred_authdata_len "const fido_cred_t *cred" +.Ft size_t +.Fn fido_cred_authdata_raw_len "const fido_cred_t *cred" +.Ft size_t +.Fn fido_cred_clientdata_hash_len "const fido_cred_t *cred" +.Ft size_t +.Fn fido_cred_id_len "const fido_cred_t *cred" +.Ft size_t +.Fn fido_cred_aaguid_len "const fido_cred_t *cred" +.Ft size_t +.Fn fido_cred_largeblob_key_len "const fido_cred_t *cred" +.Ft size_t +.Fn fido_cred_pubkey_len "const fido_cred_t *cred" +.Ft size_t +.Fn fido_cred_sig_len "const fido_cred_t *cred" +.Ft size_t +.Fn fido_cred_user_id_len "const fido_cred_t *cred" +.Ft size_t +.Fn fido_cred_x5c_len "const fido_cred_t *cred" +.Ft size_t +.Fn fido_cred_attstmt_len "const fido_cred_t *cred" +.Ft int +.Fn fido_cred_type "const fido_cred_t *cred" +.Ft uint8_t +.Fn fido_cred_flags "const fido_cred_t *cred" +.Ft uint32_t +.Fn fido_cred_sigcount "const fido_cred_t *cred" +.Sh DESCRIPTION +FIDO2 credentials are abstracted in +.Em libfido2 +by the +.Vt fido_cred_t +type. +The functions described in this page allow a +.Vt fido_cred_t +type to be allocated, deallocated, and inspected. +For other operations on +.Vt fido_cred_t , +please refer to +.Xr fido_cred_set_authdata 3 , +.Xr fido_cred_exclude 3 , +.Xr fido_cred_verify 3 , +and +.Xr fido_dev_make_cred 3 . +.Pp +The +.Fn fido_cred_new +function returns a pointer to a newly allocated, empty +.Vt fido_cred_t +type. +If memory cannot be allocated, NULL is returned. +.Pp +The +.Fn fido_cred_free +function releases the memory backing +.Fa *cred_p , +where +.Fa *cred_p +must have been previously allocated by +.Fn fido_cred_new . +On return, +.Fa *cred_p +is set to NULL. +Either +.Fa cred_p +or +.Fa *cred_p +may be NULL, in which case +.Fn fido_cred_free +is a NOP. +.Pp +If the CTAP 2.1 +.Dv FIDO_EXT_MINPINLEN +extension is enabled on +.Fa cred , +then the +.Fn fido_cred_pin_minlen +function returns the minimum PIN length of +.Fa cred . +Otherwise, +.Fn fido_cred_pin_minlen +returns zero. +See +.Xr fido_cred_set_pin_minlen 3 +on how to enable this extension. +.Pp +If the CTAP 2.1 +.Dv FIDO_EXT_CRED_PROTECT +extension is enabled on +.Fa cred , +then the +.Fn fido_cred_prot +function returns the protection of +.Fa cred . +Otherwise, +.Fn fido_cred_prot +returns zero. +See +.Xr fido_cred_set_prot 3 +for the protection policies understood by +.Em libfido2 . +.Pp +The +.Fn fido_cred_fmt +function returns a pointer to a NUL-terminated string containing +the attestation statement format identifier of +.Fa cred , +or NULL if +.Fa cred +does not have a format set. +.Pp +The +.Fn fido_cred_rp_id , +.Fn fido_cred_rp_name , +.Fn fido_cred_user_name , +and +.Fn fido_cred_display_name +functions return pointers to NUL-terminated strings holding the +relying party ID, relying party name, user name, and user display +name attributes of +.Fa cred , +or NULL if the respective entry is not set. +.Pp +The +.Fn fido_cred_authdata_ptr , +.Fn fido_cred_authdata_raw_ptr , +.Fn fido_cred_clientdata_hash_ptr , +.Fn fido_cred_id_ptr , +.Fn fido_cred_aaguid_ptr , +.Fn fido_cred_largeblob_key_ptr , +.Fn fido_cred_pubkey_ptr , +.Fn fido_cred_sig_ptr , +.Fn fido_cred_user_id_ptr , +.Fn fido_cred_x5c_ptr , +and +.Fn fido_cred_attstmt_ptr +functions return pointers to the CBOR-encoded and raw authenticator +data, client data hash, ID, authenticator attestation GUID, +.Dq largeBlobKey , +public key, signature, user ID, x509 certificate, and attestation +statement parts of +.Fa cred , +or NULL if the respective entry is not set. +.Pp +The corresponding length can be obtained by +.Fn fido_cred_authdata_len , +.Fn fido_cred_authdata_raw_len , +.Fn fido_cred_clientdata_hash_len , +.Fn fido_cred_id_len , +.Fn fido_cred_aaguid_len , +.Fn fido_cred_largeblob_key_len , +.Fn fido_cred_pubkey_len , +.Fn fido_cred_sig_len , +.Fn fido_cred_user_id_len , +.Fn fido_cred_x5c_len , +and +.Fn fido_cred_attstmt_len . +.Pp +The authenticator data, x509 certificate, and signature parts of a +credential are typically passed to a FIDO2 server for verification. +.Pp +The +.Fn fido_cred_type +function returns the COSE algorithm of +.Fa cred . +.Pp +The +.Fn fido_cred_flags +function returns the authenticator data flags of +.Fa cred . +.Pp +The +.Fn fido_cred_sigcount +function returns the authenticator data signature counter of +.Fa cred . +.Sh RETURN VALUES +The authenticator data returned by +.Fn fido_cred_authdata_ptr +is a CBOR-encoded byte string, as obtained from the authenticator. +To obtain the decoded byte string, use +.Fn fido_cred_authdata_raw_ptr . +.Pp +If not NULL, pointers returned by +.Fn fido_cred_fmt , +.Fn fido_cred_authdata_ptr , +.Fn fido_cred_clientdata_hash_ptr , +.Fn fido_cred_id_ptr , +.Fn fido_cred_aaguid_ptr , +.Fn fido_cred_largeblob_key_ptr , +.Fn fido_cred_pubkey_ptr , +.Fn fido_cred_sig_ptr , +and +.Fn fido_cred_x5c_ptr +are guaranteed to exist until any API function that takes +.Fa cred +without the +.Em const +qualifier is invoked. +.Sh SEE ALSO +.Xr fido_cred_exclude 3 , +.Xr fido_cred_set_authdata 3 , +.Xr fido_cred_set_pin_minlen 3 , +.Xr fido_cred_set_prot 3 , +.Xr fido_cred_verify 3 , +.Xr fido_credman_metadata_new 3 , +.Xr fido_dev_largeblob_get 3 , +.Xr fido_dev_make_cred 3 |