eddsa_pk_new(3) - NetBSD Manual Pages

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EDDSA_PK_NEW(3)         NetBSD Library Functions Manual        EDDSA_PK_NEW(3)


NAME

     eddsa_pk_new, eddsa_pk_free, eddsa_pk_from_EVP_PKEY, eddsa_pk_from_ptr,
     eddsa_pk_to_EVP_PKEY -- FIDO2 COSE EDDSA API


SYNOPSIS

     #include <openssl/evp.h>
     #include <fido/eddsa.h>

     eddsa_pk_t *
     eddsa_pk_new(void);

     void
     eddsa_pk_free(eddsa_pk_t **pkp);

     int
     eddsa_pk_from_EVP_PKEY(eddsa_pk_t *pk, const EVP_PKEY *pkey);

     int
     eddsa_pk_from_ptr(eddsa_pk_t *pk, const void *ptr, size_t len);

     EVP_PKEY *
     eddsa_pk_to_EVP_PKEY(const eddsa_pk_t *pk);


DESCRIPTION

     EDDSA is the name given in the CBOR Object Signing and Encryption (COSE)
     RFC to EDDSA over Curve25519 with SHA-512.  The COSE EDDSA API of
     libfido2 is an auxiliary API with routines to convert between the differ-
     ent EDDSA public key types used in libfido2 and OpenSSL.

     In libfido2, EDDSA public keys are abstracted by the eddsa_pk_t type.

     The eddsa_pk_new() function returns a pointer to a newly allocated, empty
     eddsa_pk_t type.  If memory cannot be allocated, NULL is returned.

     The eddsa_pk_free() function releases the memory backing *pkp, where *pkp
     must have been previously allocated by eddsa_pk_new().  On return, *pkp
     is set to NULL.  Either pkp or *pkp may be NULL, in which case
     eddsa_pk_free() is a NOP.

     The eddsa_pk_from_EVP_PKEY() function fills pk with the contents of pkey.
     No references to pkey are kept.

     The eddsa_pk_from_ptr() function fills pk with the contents of ptr, where
     ptr points to len bytes.  No references to ptr are kept.

     The eddsa_pk_to_EVP_PKEY() function converts pk to a newly allocated
     EVP_PKEY type with a reference count of 1.  No internal references to the
     returned pointer are kept.  If an error occurs, eddsa_pk_to_EVP_PKEY()
     returns NULL.


RETURN VALUES

     The eddsa_pk_from_EVP_PKEY() and eddsa_pk_from_ptr() functions return
     FIDO_OK on success.  On error, a different error code defined in
     <fido/err.h> is returned.


SEE ALSO

     es256_pk_new(3), es384_pk_new(3), fido_assert_verify(3),
     fido_cred_pubkey_ptr(3), rs256_pk_new(3)

NetBSD 10.99                   December 26, 2024                  NetBSD 10.99