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git://git.gnupg.org/gnupg.git
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2005-03-02 Moritz Schulte <moritz@g10code.com>
* command-ssh.c (sexp_key_extract): Removed FIXME, since xtrymallos does set errno correctly by now. (sexp_extract_identifier): Remove const attribute from identifier. (ssh_handler_request_identities): Remove const attribute from key_type; removes ugly casts and FIXME. (sexp_key_extract): Remove const attribute from comment. (ssh_send_key_public): Remove const attribute from key_type/comment; removes ugly cast. (data_sign): Remove const attribute from identifier; removes ugly cast. (key_secret_to_public): Remove const attribute from comment; removes ugly cast. (ssh_handler_sign_request): Remove const attribute from p. (sexp_key_extract): Use make_cstring(). (ssh_key_extract_comment): Likewise. (ssh_key_to_buffer): Use secure memory for memory area to hold the key S-Expression. Added more comments.
This commit is contained in:
Moritz Schulte
parent
faef9f929b
commit
843e844d98
@ -1,3 +1,24 @@
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2005-03-02 Moritz Schulte <moritz@g10code.com>
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* command-ssh.c (sexp_key_extract): Removed FIXME, since
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xtrymallos does set errno correctly by now.
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(sexp_extract_identifier): Remove const attribute from identifier.
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(ssh_handler_request_identities): Remove const attribute from
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key_type; removes ugly casts and FIXME.
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(sexp_key_extract): Remove const attribute from comment.
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(ssh_send_key_public): Remove const attribute from
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key_type/comment; removes ugly cast.
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(data_sign): Remove const attribute from identifier; removes ugly
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cast.
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(key_secret_to_public): Remove const attribute from comment;
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removes ugly cast.
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(ssh_handler_sign_request): Remove const attribute from p.
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(sexp_key_extract): Use make_cstring().
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(ssh_key_extract_comment): Likewise.
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(ssh_key_to_buffer): Use secure memory for memory area to hold the
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key S-Expression.
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Added more comments.
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2005-02-25 Werner Koch <wk@g10code.com>
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* findkey.c (modify_description): Keep invalid % escapes, so that
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@ -1075,7 +1075,7 @@ sexp_key_construct (gcry_sexp_t *sexp,
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static gpg_error_t
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sexp_key_extract (gcry_sexp_t sexp,
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ssh_key_type_spec_t key_spec, int *secret,
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gcry_mpi_t **mpis, const char **comment)
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gcry_mpi_t **mpis, char **comment)
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{
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gpg_error_t err;
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gcry_sexp_t value_list;
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@ -1127,7 +1127,7 @@ sexp_key_extract (gcry_sexp_t sexp,
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mpis_new = xtrymalloc (sizeof (*mpis_new) * (elems_n + 1));
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if (! mpis_new)
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{
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err = gpg_error_from_errno (errno); /* FIXME, xtrymalloc+errno. */
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err = gpg_error_from_errno (errno);
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goto out;
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}
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memset (mpis_new, 0, sizeof (*mpis_new) * (elems_n + 1));
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@ -1176,14 +1176,12 @@ sexp_key_extract (gcry_sexp_t sexp,
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data_n = 6;
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}
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comment_new = xtrymalloc (data_n + 1);
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comment_new = make_cstring (data, data_n);
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if (! comment_new)
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{
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err = gpg_error_from_errno (errno);
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goto out;
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}
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strncpy (comment_new, data, data_n);
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comment_new[data_n] = 0;
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if (secret)
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*secret = is_secret;
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@ -1208,7 +1206,7 @@ sexp_key_extract (gcry_sexp_t sexp,
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/* Extract the car from SEXP, and create a newly created C-string
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which is to be stored in IDENTIFIER. */
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static gpg_error_t
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sexp_extract_identifier (gcry_sexp_t sexp, const char **identifier)
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sexp_extract_identifier (gcry_sexp_t sexp, char **identifier)
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{
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char *identifier_new;
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gcry_sexp_t sublist;
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@ -1251,8 +1249,16 @@ sexp_extract_identifier (gcry_sexp_t sexp, const char **identifier)
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/* Key I/O. */
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/*
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Key I/O.
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*/
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/* Search for a key specification entry. If SSH_NAME is not NULL,
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search for an entry whose "ssh_name" is equal to SSH_NAME;
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otherwise, search for an entry whose "name" is equal to NAME.
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Store found entry in SPEC on success, return error otherwise. */
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static gpg_error_t
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ssh_key_type_lookup (const char *ssh_name, const char *name,
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ssh_key_type_spec_t *spec)
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@ -1276,6 +1282,11 @@ ssh_key_type_lookup (const char *ssh_name, const char *name,
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return err;
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}
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/* Receive a key from STREAM, according to the key specification given
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as KEY_SPEC. Depending on SECRET, receive a secret or a public
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key. If READ_COMMENT is true, receive a comment string as well.
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Constructs a new S-Expression from received data and stores it in
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KEY_NEW. Returns zero on success or an error code. */
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static gpg_error_t
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ssh_receive_key (estream_t stream, gcry_sexp_t *key_new, int secret,
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int read_comment, ssh_key_type_spec_t *key_spec)
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@ -1342,6 +1353,9 @@ ssh_receive_key (estream_t stream, gcry_sexp_t *key_new, int secret,
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return err;
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}
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/* Converts a key of type TYPE, whose key material is given in MPIS,
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into a newly created binary blob, which is to be stored in
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BLOB/BLOB_SIZE. Returns zero on success or an error code. */
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static gpg_error_t
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ssh_convert_key_to_blob (unsigned char **blob, size_t *blob_size,
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const char *type, gcry_mpi_t *mpis)
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@ -1417,8 +1431,8 @@ ssh_send_key_public (estream_t stream, gcry_sexp_t key_public,
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{
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ssh_key_type_spec_t spec;
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gcry_mpi_t *mpi_list;
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const char *key_type;
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const char *comment;
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char *key_type;
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char *comment;
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unsigned char *blob;
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size_t blob_n;
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gpg_error_t err;
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@ -1455,13 +1469,16 @@ ssh_send_key_public (estream_t stream, gcry_sexp_t key_public,
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out:
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mpint_list_free (mpi_list);
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xfree ((void *) key_type);
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xfree ((void *) comment);
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xfree (key_type);
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xfree (comment);
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xfree (blob);
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return err;
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}
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/* Read a public key out of BLOB/BLOB_SIZE according to the key
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specification given as KEY_SPEC, storing the new key in KEY_PUBLIC.
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Returns zero on success or an error code. */
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static gpg_error_t
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ssh_read_key_public_from_blob (unsigned char *blob, size_t blob_size,
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gcry_sexp_t *key_public,
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@ -1499,11 +1516,14 @@ ssh_read_key_public_from_blob (unsigned char *blob, size_t blob_size,
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/* Converts the secret key KEY_SECRET into a public key, storing it in
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KEY_PUBLIC. SPEC is the according key specification. Returns zero
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on success or an error code. */
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static gpg_error_t
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key_secret_to_public (gcry_sexp_t *key_public,
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ssh_key_type_spec_t spec, gcry_sexp_t key_secret)
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{
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const char *comment;
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char *comment;
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gcry_mpi_t *mpis;
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gpg_error_t err;
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int is_secret;
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@ -1520,13 +1540,13 @@ key_secret_to_public (gcry_sexp_t *key_public,
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out:
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mpint_list_free (mpis);
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xfree ((char *) comment);
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xfree (comment);
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return err;
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}
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/* Chec whether a smartcard is available and whether it has a usable
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/* Check whether a smartcard is available and whether it has a usable
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key. Store a copy of that key at R_PK and return 0. If no key is
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available store NULL at R_PK and return an error code. If CARDSN
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is no NULL, a string with the serial number of the card will be
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@ -1685,16 +1705,21 @@ card_key_available (ctrl_t ctrl, gcry_sexp_t *r_pk, char **cardsn)
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}
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/*
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Request handler.
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*/
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/* Handler for the "request_identities" command. */
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static gpg_error_t
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ssh_handler_request_identities (ctrl_t ctrl,
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estream_t request, estream_t response)
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{
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const char *key_type;
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char *key_type;
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ssh_key_type_spec_t spec;
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struct dirent *dir_entry;
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char *key_directory;
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@ -1828,7 +1853,7 @@ ssh_handler_request_identities (ctrl_t ctrl,
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if (err)
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goto out;
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xfree ((void *) key_type);
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xfree (key_type);
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key_type = NULL;
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err = key_secret_to_public (&key_public, spec, key_secret);
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@ -1894,13 +1919,12 @@ ssh_handler_request_identities (ctrl_t ctrl,
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free (key_directory);
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xfree (key_path);
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xfree (buffer);
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/* FIXME: Ist is for sure is a Bad Thing to use the const qualifier
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and later cast it away. You can't do that!!! */
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xfree ((void *) key_type); /* FIXME? */
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xfree (key_type);
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return ret_err;
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}
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/* */
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static gpg_error_t
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data_hash (unsigned char *data, size_t data_n,
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int md_algorithm, unsigned char *hash)
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@ -1923,7 +1947,7 @@ data_sign (ctrl_t ctrl, ssh_signature_encoder_t sig_encoder,
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gcry_mpi_t sig_value;
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unsigned char *sig_blob;
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size_t sig_blob_n;
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const char *identifier;
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char *identifier;
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const char *identifier_raw;
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size_t identifier_n;
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ssh_key_type_spec_t spec;
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@ -2064,7 +2088,7 @@ data_sign (ctrl_t ctrl, ssh_signature_encoder_t sig_encoder,
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gcry_sexp_release (signature_sexp);
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gcry_sexp_release (sublist);
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mpint_list_free (mpis);
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xfree ((void *) identifier);
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xfree (identifier);
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return err;
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}
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@ -2084,7 +2108,7 @@ ssh_handler_sign_request (ctrl_t ctrl, estream_t request, estream_t response)
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size_t sig_n;
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u32 data_size;
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u32 flags;
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const void *p;
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void *p;
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gpg_error_t err;
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gpg_error_t ret_err;
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@ -2197,15 +2221,13 @@ ssh_key_extract_comment (gcry_sexp_t key, char **comment)
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goto out;
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}
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comment_new = xtrymalloc (data_n + 1);
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comment_new = make_cstring (data, data_n);
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if (! comment_new)
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{
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err = gpg_error_from_errno (errno);
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goto out;
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}
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strncpy (comment_new, data, data_n);
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comment_new[data_n] = 0;
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*comment = comment_new;
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err = 0;
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@ -2243,8 +2265,7 @@ ssh_key_to_buffer (gcry_sexp_t key, const char *passphrase,
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err = 0;
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buffer_new_n = gcry_sexp_sprint (key, GCRYSEXP_FMT_CANON, NULL, 0);
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buffer_new = xtrymalloc (buffer_new_n);
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/* FIXME: secmem? */
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buffer_new = xtrymalloc_secure (buffer_new_n);
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if (! buffer_new)
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{
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err = gpg_error_from_errno (errno);
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