+ func_realloc, func_free);
+}
+
+/* Ciphers. */
+
+Gc_rc
+gc_cipher_open (Gc_cipher alg, Gc_cipher_mode mode,
+ gc_cipher_handle * outhandle)
+{
+ int gcryalg, gcrymode;
+ gcry_error_t err;
+
+ switch (alg)
+ {
+ case GC_AES128:
+ gcryalg = GCRY_CIPHER_RIJNDAEL;
+ break;
+
+ case GC_AES192:
+ gcryalg = GCRY_CIPHER_RIJNDAEL;
+ break;
+
+ case GC_AES256:
+ gcryalg = GCRY_CIPHER_RIJNDAEL256;
+ break;
+
+ case GC_3DES:
+ gcryalg = GCRY_CIPHER_3DES;
+ break;
+
+ case GC_DES:
+ gcryalg = GCRY_CIPHER_DES;
+ break;
+
+ case GC_ARCFOUR128:
+ case GC_ARCFOUR40:
+ gcryalg = GCRY_CIPHER_ARCFOUR;
+ break;
+
+ case GC_ARCTWO40:
+ gcryalg = GCRY_CIPHER_RFC2268_40;
+ break;
+
+#ifdef HAVE_CAMELLIA
+ case GC_CAMELLIA128:
+ gcryalg = GCRY_CIPHER_CAMELLIA128;
+ break;
+
+ case GC_CAMELLIA256:
+ gcryalg = GCRY_CIPHER_CAMELLIA256;
+ break;
+#endif
+
+ default:
+ return GC_INVALID_CIPHER;
+ }
+
+ switch (mode)
+ {
+ case GC_ECB:
+ gcrymode = GCRY_CIPHER_MODE_ECB;
+ break;
+
+ case GC_CBC:
+ gcrymode = GCRY_CIPHER_MODE_CBC;
+ break;
+
+ case GC_STREAM:
+ gcrymode = GCRY_CIPHER_MODE_STREAM;
+ break;
+
+ default:
+ return GC_INVALID_CIPHER;
+ }
+
+ err = gcry_cipher_open ((gcry_cipher_hd_t *) outhandle,
+ gcryalg, gcrymode, 0);
+ if (gcry_err_code (err))
+ return GC_INVALID_CIPHER;
+
+ return GC_OK;
+}
+
+Gc_rc
+gc_cipher_setkey (gc_cipher_handle handle, size_t keylen, const char *key)
+{
+ gcry_error_t err;
+
+ err = gcry_cipher_setkey ((gcry_cipher_hd_t) handle, key, keylen);
+ if (gcry_err_code (err))
+ return GC_INVALID_CIPHER;
+
+ return GC_OK;
+}
+
+Gc_rc
+gc_cipher_setiv (gc_cipher_handle handle, size_t ivlen, const char *iv)
+{
+ gcry_error_t err;
+
+ err = gcry_cipher_setiv ((gcry_cipher_hd_t) handle, iv, ivlen);
+ if (gcry_err_code (err))
+ return GC_INVALID_CIPHER;
+
+ return GC_OK;
+}
+
+Gc_rc
+gc_cipher_encrypt_inline (gc_cipher_handle handle, size_t len, char *data)
+{
+ if (gcry_cipher_encrypt ((gcry_cipher_hd_t) handle,
+ data, len, NULL, len) != 0)
+ return GC_INVALID_CIPHER;
+
+ return GC_OK;
+}
+
+Gc_rc
+gc_cipher_decrypt_inline (gc_cipher_handle handle, size_t len, char *data)
+{
+ if (gcry_cipher_decrypt ((gcry_cipher_hd_t) handle,
+ data, len, NULL, len) != 0)
+ return GC_INVALID_CIPHER;
+
+ return GC_OK;
+}
+
+Gc_rc
+gc_cipher_close (gc_cipher_handle handle)
+{
+ gcry_cipher_close (handle);
+
+ return GC_OK;
+}
+
+/* Hashes. */
+
+typedef struct _gc_hash_ctx {
+ Gc_hash alg;
+ Gc_hash_mode mode;
+ gcry_md_hd_t gch;
+#ifdef GNULIB_GC_MD2
+ char hash[GC_MD2_DIGEST_SIZE];
+ struct md2_ctx md2Context;
+#endif
+} _gc_hash_ctx;
+
+Gc_rc
+gc_hash_open (Gc_hash hash, Gc_hash_mode mode, gc_hash_handle * outhandle)
+{
+ _gc_hash_ctx *ctx;
+ int gcryalg = 0, gcrymode = 0;
+ gcry_error_t err;
+ Gc_rc rc = GC_OK;
+
+ ctx = calloc (sizeof (*ctx), 1);
+ if (!ctx)
+ return GC_MALLOC_ERROR;
+
+ ctx->alg = hash;
+ ctx->mode = mode;
+
+ switch (hash)
+ {
+ case GC_MD2:
+ gcryalg = GCRY_MD_NONE;
+ break;
+
+ case GC_MD4:
+ gcryalg = GCRY_MD_MD4;
+ break;
+
+ case GC_MD5:
+ gcryalg = GCRY_MD_MD5;
+ break;
+
+ case GC_SHA1:
+ gcryalg = GCRY_MD_SHA1;
+ break;
+
+ case GC_SHA256:
+ gcryalg = GCRY_MD_SHA256;
+ break;
+
+ case GC_SHA384:
+ gcryalg = GCRY_MD_SHA384;
+ break;
+
+ case GC_SHA512:
+ gcryalg = GCRY_MD_SHA512;
+ break;
+
+ case GC_SHA224:
+ gcryalg = GCRY_MD_SHA224;
+ break;
+
+ case GC_RMD160:
+ gcryalg = GCRY_MD_RMD160;
+ break;
+
+ default:
+ rc = GC_INVALID_HASH;
+ }
+
+ switch (mode)
+ {
+ case 0:
+ gcrymode = 0;
+ break;
+
+ case GC_HMAC:
+ gcrymode = GCRY_MD_FLAG_HMAC;
+ break;
+
+ default:
+ rc = GC_INVALID_HASH;
+ }
+
+ if (rc == GC_OK && gcryalg != GCRY_MD_NONE)
+ {
+ err = gcry_md_open (&ctx->gch, gcryalg, gcrymode);
+ if (gcry_err_code (err))
+ rc = GC_INVALID_HASH;
+ }
+
+ if (rc == GC_OK)
+ *outhandle = ctx;
+ else
+ free (ctx);
+
+ return rc;
+}
+
+Gc_rc
+gc_hash_clone (gc_hash_handle handle, gc_hash_handle * outhandle)
+{
+ _gc_hash_ctx *in = handle;
+ _gc_hash_ctx *out;
+ int err;
+
+ *outhandle = out = calloc (sizeof (*out), 1);
+ if (!out)
+ return GC_MALLOC_ERROR;
+
+ memcpy (out, in, sizeof (*out));
+
+ err = gcry_md_copy (&out->gch, in->gch);
+ if (err)
+ {
+ free (out);
+ return GC_INVALID_HASH;
+ }
+
+ return GC_OK;
+}
+
+size_t
+gc_hash_digest_length (Gc_hash hash)
+{
+ size_t len;
+
+ switch (hash)
+ {
+ case GC_MD2:
+ len = GC_MD2_DIGEST_SIZE;
+ break;
+
+ case GC_MD4:
+ len = GC_MD4_DIGEST_SIZE;
+ break;
+
+ case GC_MD5:
+ len = GC_MD5_DIGEST_SIZE;
+ break;
+
+ case GC_RMD160:
+ len = GC_RMD160_DIGEST_SIZE;
+ break;
+
+ case GC_SHA1:
+ len = GC_SHA1_DIGEST_SIZE;
+ break;
+
+ case GC_SHA256:
+ len = GC_SHA256_DIGEST_SIZE;
+ break;
+
+ case GC_SHA384:
+ len = GC_SHA384_DIGEST_SIZE;
+ break;
+
+ case GC_SHA512:
+ len = GC_SHA512_DIGEST_SIZE;
+ break;
+
+ case GC_SHA224:
+ len = GC_SHA224_DIGEST_SIZE;
+ break;
+
+ default:
+ return 0;
+ }
+
+ return len;
+}
+
+void
+gc_hash_hmac_setkey (gc_hash_handle handle, size_t len, const char *key)
+{
+ _gc_hash_ctx *ctx = handle;
+#ifdef GNULIB_GC_MD2
+ if (ctx->alg != GC_MD2)
+#endif
+ gcry_md_setkey (ctx->gch, key, len);
+}
+
+void
+gc_hash_write (gc_hash_handle handle, size_t len, const char *data)
+{
+ _gc_hash_ctx *ctx = handle;
+
+#ifdef GNULIB_GC_MD2
+ if (ctx->alg == GC_MD2)
+ md2_process_bytes (data, len, &ctx->md2Context);
+ else
+#endif
+ gcry_md_write (ctx->gch, data, len);
+}
+
+const char *
+gc_hash_read (gc_hash_handle handle)
+{
+ _gc_hash_ctx *ctx = handle;
+ const char *digest;
+
+#ifdef GNULIB_GC_MD2
+ if (ctx->alg == GC_MD2)
+ {
+ md2_finish_ctx (&ctx->md2Context, ctx->hash);
+ digest = ctx->hash;
+ }
+ else
+#endif
+ {
+ gcry_md_final (ctx->gch);
+ digest = gcry_md_read (ctx->gch, 0);
+ }
+
+ return digest;
+}
+
+void
+gc_hash_close (gc_hash_handle handle)
+{
+ _gc_hash_ctx *ctx = handle;
+
+#ifdef GNULIB_GC_MD2
+ if (ctx->alg != GC_MD2)
+#endif
+ gcry_md_close (ctx->gch);
+
+ free (ctx);
+}
+
+Gc_rc
+gc_hash_buffer (Gc_hash hash, const void *in, size_t inlen, char *resbuf)
+{
+ int gcryalg;
+
+ switch (hash)
+ {
+#ifdef GNULIB_GC_MD2
+ case GC_MD2:
+ md2_buffer (in, inlen, resbuf);
+ return GC_OK;
+ break;
+#endif
+
+#ifdef GNULIB_GC_MD4
+ case GC_MD4:
+ gcryalg = GCRY_MD_MD4;
+ break;
+#endif
+
+#ifdef GNULIB_GC_MD5
+ case GC_MD5:
+ gcryalg = GCRY_MD_MD5;
+ break;
+#endif
+
+#ifdef GNULIB_GC_SHA1
+ case GC_SHA1:
+ gcryalg = GCRY_MD_SHA1;
+ break;
+#endif
+
+#ifdef GNULIB_GC_SHA256
+ case GC_SHA256:
+ gcryalg = GCRY_MD_SHA256;
+ break;
+#endif
+
+#ifdef GNULIB_GC_SHA384
+ case GC_SHA384:
+ gcryalg = GCRY_MD_SHA384;
+ break;
+#endif
+
+#ifdef GNULIB_GC_SHA512
+ case GC_SHA512:
+ gcryalg = GCRY_MD_SHA512;
+ break;
+#endif
+
+#ifdef GNULIB_GC_SHA224
+ case GC_SHA224:
+ gcryalg = GCRY_MD_SHA224;
+ break;
+#endif
+
+#ifdef GNULIB_GC_RMD160
+ case GC_RMD160:
+ gcryalg = GCRY_MD_RMD160;
+ break;
+#endif
+
+ default:
+ return GC_INVALID_HASH;
+ }
+
+ gcry_md_hash_buffer (gcryalg, resbuf, in, inlen);
+
+ return GC_OK;