--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libtomcrypt/tests/no_prng.c	Fri Feb 09 21:44:05 2018 +0800
@@ -0,0 +1,185 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis
+ *
+ * LibTomCrypt is a library that provides various cryptographic
+ * algorithms in a highly modular and flexible manner.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ */
+#include "tomcrypt.h"
+
+/**
+  @file no_prng.c
+  NO PRNG, Steffen Jaeckel
+*/
+
+#ifdef LTC_PKCS_1
+
+typedef struct
+{
+   struct ltc_prng_descriptor desc;
+   char name[64];
+   unsigned char entropy[1024];
+   unsigned long len;
+   unsigned long offset;
+} no_prng_desc_t;
+
+/**
+  Start the PRNG
+  @param prng     [out] The PRNG state to initialize
+  @return CRYPT_OK if successful
+*/
+int no_prng_start(prng_state *prng)
+{
+   no_prng_desc_t *no_prng = (no_prng_desc_t*) prng;
+   LTC_ARGCHK(no_prng != NULL);
+   LTC_ARGCHK(no_prng->name == (char*)no_prng + offsetof(no_prng_desc_t, name));
+   no_prng->len = 0;
+   no_prng->offset = 0;
+
+   return CRYPT_OK;
+}
+
+/**
+  Add entropy to the PRNG state
+  @param in       The data to add
+  @param inlen    Length of the data to add
+  @param prng     PRNG state to update
+  @return CRYPT_OK if successful
+*/
+int no_prng_add_entropy(const unsigned char *in, unsigned long inlen, prng_state *prng)
+{
+   no_prng_desc_t *no_prng = (no_prng_desc_t*) prng;
+   LTC_ARGCHK(no_prng != NULL);
+   LTC_ARGCHK(no_prng->name == (char*)no_prng + offsetof(no_prng_desc_t, name));
+   LTC_ARGCHK(in != NULL);
+   LTC_ARGCHK(inlen <= sizeof(no_prng->entropy));
+
+   no_prng->len = MIN(inlen, sizeof(no_prng->entropy));
+   memcpy(no_prng->entropy, in, no_prng->len);
+   no_prng->offset = 0;
+
+   return CRYPT_OK;
+
+}
+
+/**
+  Make the PRNG ready to read from
+  @param prng   The PRNG to make active
+  @return CRYPT_OK if successful
+*/
+int no_prng_ready(prng_state *prng)
+{
+    LTC_ARGCHK(prng != NULL);
+
+    return CRYPT_OK;
+}
+
+/**
+  Read from the PRNG
+  @param out      Destination
+  @param outlen   Length of output
+  @param prng     The active PRNG to read from
+  @return Number of octets read
+*/
+unsigned long no_prng_read(unsigned char *out, unsigned long outlen, prng_state *prng)
+{
+   no_prng_desc_t *no_prng = (no_prng_desc_t*) prng;
+   LTC_ARGCHK(no_prng != NULL);
+   LTC_ARGCHK(no_prng->name == (char*)no_prng + offsetof(no_prng_desc_t, name));
+   LTC_ARGCHK(out != NULL);
+
+   outlen = MIN(outlen, no_prng->len - no_prng->offset);
+   memcpy(out, &no_prng->entropy[no_prng->offset], outlen);
+   no_prng->offset += outlen;
+
+   return outlen;
+}
+
+/**
+  Terminate the PRNG
+  @param prng   The PRNG to terminate
+  @return CRYPT_OK if successful
+*/
+int no_prng_done(prng_state *prng)
+{
+   LTC_UNUSED_PARAM(prng);
+   return CRYPT_OK;
+}
+
+/**
+  Export the PRNG state
+  @param out       [out] Destination
+  @param outlen    [in/out] Max size and resulting size of the state
+  @param prng      The PRNG to export
+  @return CRYPT_OK if successful
+*/
+int no_prng_export(unsigned char *out, unsigned long *outlen, prng_state *prng)
+{
+   LTC_UNUSED_PARAM(out);
+   LTC_UNUSED_PARAM(outlen);
+   LTC_UNUSED_PARAM(prng);
+   return CRYPT_OK;
+}
+
+/**
+  Import a PRNG state
+  @param in       The PRNG state
+  @param inlen    Size of the state
+  @param prng     The PRNG to import
+  @return CRYPT_OK if successful
+*/
+int no_prng_import(const unsigned char *in, unsigned long inlen, prng_state *prng)
+{
+   LTC_UNUSED_PARAM(in);
+   LTC_UNUSED_PARAM(inlen);
+   LTC_UNUSED_PARAM(prng);
+   return CRYPT_OK;
+}
+
+/**
+  PRNG self-test
+  @return CRYPT_OK if successful, CRYPT_NOP if self-testing has been disabled
+*/
+int no_prng_test(void)
+{
+   return CRYPT_OK;
+}
+
+static const struct ltc_prng_descriptor no_prng_desc =
+{
+    NULL, 0,
+    &no_prng_start,
+    &no_prng_add_entropy,
+    &no_prng_ready,
+    &no_prng_read,
+    &no_prng_done,
+    &no_prng_export,
+    &no_prng_import,
+    &no_prng_test
+};
+
+struct ltc_prng_descriptor* no_prng_desc_get(void)
+{
+   no_prng_desc_t* no_prng = XMALLOC(sizeof(*no_prng));
+   LTC_ARGCHK(no_prng != NULL);
+   XMEMCPY(&no_prng->desc, &no_prng_desc, sizeof(no_prng_desc));
+   LTC_ARGCHK(snprintf(no_prng->name, sizeof(no_prng->name), "no_prng@%p", no_prng) < (int)sizeof(no_prng->name));
+   no_prng->desc.name = no_prng->name;
+   return &no_prng->desc;
+}
+
+void no_prng_desc_free(struct ltc_prng_descriptor* prng)
+{
+   no_prng_desc_t *no_prng = (no_prng_desc_t*) prng;
+   LTC_ARGCHK(no_prng != NULL);
+   LTC_ARGCHK(no_prng->name == (char*)no_prng + offsetof(no_prng_desc_t, name));
+   XFREE(no_prng);
+}
+
+#endif
+
+
+/* ref:         $Format:%D$ */
+/* git commit:  $Format:%H$ */
+/* commit time: $Format:%ai$ */