New module: crypto/gc-sm3

* lib/gc.h: Declare SM3-related stuffs.
* lib/gc-gnulib.c: Support sm3 in internal functions.
* lib/gc-libgcrypt.c: Support sm3 with libgcrypt.
* m4/gc-sm3.m4: m4 file for gc-sm3 module.
* modules/crypto/gc-sm3: Define gc-sm3 module.
* tests/test-gc-sm3.c: Implement SM3 test case with libgcrypt.
* modules/crypto/gc-sm3-tests: Define gc-sm3 test module.
* MODULES.html.sh: List gc-sm3 module.

1 files changed, 46 insertions, 0 deletions

diff --git a/lib/gc-libgcrypt.c b/lib/gc-libgcrypt.c
index f0c8d82293..49ba0e13cb 100644
--- a/lib/gc-libgcrypt.c
+++ b/lib/gc-libgcrypt.c
@@ -304,6 +304,10 @@ gc_hash_open (Gc_hash hash, Gc_hash_mode mode, gc_hash_handle * outhandle)
       gcryalg = GCRY_MD_RMD160;
       break;
 
+    case GC_SM3:
+      gcryalg = GCRY_MD_SM3;
+      break;
+
     default:
       rc = GC_INVALID_HASH;
     }
@@ -403,6 +407,10 @@ gc_hash_digest_length (Gc_hash hash)
       len = GC_SHA224_DIGEST_SIZE;
       break;
 
+    case GC_SM3:
+      len = GC_SM3_DIGEST_SIZE;
+      break;
+
     default:
       return 0;
     }
@@ -530,6 +538,12 @@ gc_hash_buffer (Gc_hash hash, const void *in, size_t inlen, char *resbuf)
       break;
 #endif
 
+#ifdef GNULIB_GC_SM3
+    case GC_SM3:
+      gcryalg = GCRY_MD_SM3;
+      break;
+#endif
+
     default:
       return GC_INVALID_HASH;
     }
@@ -646,6 +660,38 @@ gc_sha1 (const void *in, size_t inlen, void *resbuf)
 }
 #endif
 
+#ifdef GNULIB_GC_SM3
+Gc_rc
+gc_sm3  (const void *in, size_t inlen, void *resbuf)
+{
+  size_t outlen = gcry_md_get_algo_dlen (GCRY_MD_SM3);
+  gcry_md_hd_t hd;
+  gpg_error_t err;
+  unsigned char *p;
+
+  assert (outlen == GC_SM3_DIGEST_SIZE);
+
+  err = gcry_md_open (&hd, GCRY_MD_SM3, 0);
+  if (err != GPG_ERR_NO_ERROR)
+    return GC_INVALID_HASH;
+
+  gcry_md_write (hd, in, inlen);
+
+  p = gcry_md_read (hd, GCRY_MD_SM3);
+  if (p == NULL)
+    {
+      gcry_md_close (hd);
+      return GC_INVALID_HASH;
+    }
+
+  memcpy (resbuf, p, outlen);
+
+  gcry_md_close (hd);
+
+  return GC_OK;
+}
+#endif
+
 #ifdef GNULIB_GC_HMAC_MD5
 Gc_rc
 gc_hmac_md5 (const void *key, size_t keylen,