Add gcry_pubkey_get_sexp.

* src/gcrypt.h.in (GCRY_PK_GET_PUBKEY): New.
(GCRY_PK_GET_SECKEY): New.
(gcry_pubkey_get_sexp): New.
* src/visibility.c (gcry_pubkey_get_sexp): New.
* src/visibility.h (gcry_pubkey_get_sexp): Mark visible.
* src/libgcrypt.def, src/libgcrypt.vers: Add new function.
* cipher/pubkey-internal.h: New.
* cipher/Makefile.am (libcipher_la_SOURCES): Add new file.
* cipher/ecc.c: Include pubkey-internal.h
(_gcry_pk_ecc_get_sexp): New.
* cipher/pubkey.c: Include pubkey-internal.h and context.h.
(_gcry_pubkey_get_sexp): New.
* src/context.c (_gcry_ctx_find_pointer): New.
* src/cipher-proto.h: Add _gcry_pubkey_get_sexp.
* tests/t-mpi-point.c (print_sexp): New.
(context_param, basic_ec_math_simplified): Add tests for the new
function.

* configure.ac (NEED_GPG_ERROR_VERSION): Set to 1.11.
(AH_BOTTOM) Add error codes from gpg-error 1.12
* src/g10lib.h (fips_not_operational): Use GPG_ERR_NOT_OPERATIONAL.

* mpi/ec.c (_gcry_mpi_ec_get_mpi): Fix computation of Q.
(_gcry_mpi_ec_get_point): Ditto.
--

While checking the new code I figured that the auto-computation of Q
must have led to a segv.  It seems we had no test case for that.

Signed-off-by: Werner Koch <wk@gnupg.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/gcrypt.h.in b/src/gcrypt.h.in
index 72fb6d33..85213ea4 100644
--- a/src/gcrypt.h.in
+++ b/src/gcrypt.h.in
@@ -944,6 +944,10 @@ enum gcry_pk_algos
 #define GCRY_PK_USAGE_AUTH 8   /* Good for authentication. */
 #define GCRY_PK_USAGE_UNKN 128 /* Unknown usage flag. */
 
+/* Modes used with gcry_pubkey_get_sexp.  */
+#define GCRY_PK_GET_PUBKEY 1
+#define GCRY_PK_GET_SECKEY 2
+
 /* Encrypt the DATA using the public key PKEY and store the result as
    a newly created S-expression at RESULT. */
 gcry_error_t gcry_pk_encrypt (gcry_sexp_t *result,
@@ -1007,6 +1011,9 @@ gcry_sexp_t gcry_pk_get_param (int algo, const char *name);
 #define gcry_pk_test_algo(a) \
             gcry_pk_algo_info( (a), GCRYCTL_TEST_ALGO, NULL, NULL )
 
+/* Return an S-expression representing the context CTX.  */
+gcry_error_t gcry_pubkey_get_sexp (gcry_sexp_t *r_sexp,
+                                   int mode, gcry_ctx_t ctx);