security-and-privacy/gnupg
security-and-privacy/gnupg
1
0
Fork 0
mirror of git://git.gnupg.org/gnupg.git synced 2025-07-03 22:56:33 +02:00
Code Activity

common: Add an easy to use DER builder.

Browse source 
* common/tlv-builder.c: New.
* common/tlv.c: Remove stuff only used by GnuPG 1.
(put_tlv_to_membuf, get_tlv_length): Move to ...
* common/tlv-builder.c: here.
* common/tlv.h (tlv_builder_t): New.
--

Such code should actually go into libksba and we will eventually do
that.  However, for now it is easier to keep it here.

Signed-off-by: Werner Koch <wk@gnupg.org>
(cherry picked from commit 5ea878274e)

- Add coverity meta comment from
  commit a95ddffdcd
This commit is contained in:
Werner Koch 2020-04-24 13:14:05 +02:00
parent 7b1db7192e
commit d21ced1e35
No known key found for this signature in database
GPG key ID: E3FDFF218E45B72B
4 changed files with 417 additions and 12 deletions
Download patch file Download diff file Expand all files Collapse all files

27
common/tlv.h
View file

@ -73,6 +73,11 @@ enum tlv_tag_type {
};
struct tlv_builder_s;
typedef struct tlv_builder_s *tlv_builder_t;
/*-- tlv.c --*/
/* Locate a TLV encoded data object in BUFFER of LENGTH and return a
pointer to value as well as its length in NBYTES. Return NULL if
it was not found or if the object does not fit into the buffer. */
@ -88,7 +93,6 @@ const unsigned char *find_tlv_unchecked (const unsigned char *buffer,
size_t length,
int tag, size_t *nbytes);
/* ASN.1 BER parser: Parse BUFFER of length SIZE and return the tag
and the length part from the TLV triplet. Update BUFFER and SIZE
on success. */
@ -114,5 +118,26 @@ gpg_error_t parse_sexp (unsigned char const **buf, size_t *buflen,
int *depth, unsigned char const **tok, size_t *toklen);
/*-- tlv-builder.c --*/
tlv_builder_t tlv_builder_new (int use_secure);
void tlv_builder_add_ptr (tlv_builder_t tb, int class, int tag,
void *value, size_t valuelen);
void tlv_builder_add_val (tlv_builder_t tb, int class, int tag,
const void *value, size_t valuelen);
void tlv_builder_add_tag (tlv_builder_t tb, int class, int tag);
void tlv_builder_add_end (tlv_builder_t tb);
gpg_error_t tlv_builder_finalize (tlv_builder_t tb,
void **r_obj, size_t *r_objlen);
/* Wite a TLV header to MEMBUF. */
void put_tlv_to_membuf (membuf_t *membuf, int class, int tag,
int constructed, size_t length);
/* Count the length of a to be constructed TLV. */
size_t get_tlv_length (int class, int tag, int constructed, size_t length);
#endif /* SCD_TLV_H */