[taler-exchange] 08/13: add query param functions for blind sign private and public keys

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grothoff pushed a commit to branch master
in repository exchange.

commit 9b27ee9c8d7d2bda08c795d9ae60cd2523bd8ffe
Author: Christian Blättler <blatc2@bfh.ch>
AuthorDate: Tue Dec 5 12:44:05 2023 +0100

    add query param functions for blind sign private and public keys
---
 src/include/taler_pq_lib.h |  50 ++++++++++++
 src/pq/pq_query_helper.c   | 199 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 249 insertions(+)

diff --git a/src/include/taler_pq_lib.h b/src/include/taler_pq_lib.h
index 86d458e0..06e7d53e 100644
--- a/src/include/taler_pq_lib.h
+++ b/src/include/taler_pq_lib.h
@@ -149,6 +149,7 @@ TALER_PQ_query_param_array_blinded_denom_sig (
   struct GNUNET_PQ_Context *db
   );
 
+
 /**
  * Generate query parameter for an array of blinded hashes of coin envelopes
  *
@@ -162,6 +163,7 @@ TALER_PQ_query_param_array_blinded_coin_hash (
   const struct TALER_BlindedCoinHashP *coin_evs,
   struct GNUNET_PQ_Context *db);
 
+
 /**
  * Generate query parameter for an array of mounts
  *
@@ -176,6 +178,26 @@ TALER_PQ_query_param_array_amount (
   struct GNUNET_PQ_Context *db);
 
 
+/**
+ * Generate query parameter for a blind sign public key of variable size.
+ *
+ * @param public_key pointer to the query parameter to pass
+ */
+struct GNUNET_PQ_QueryParam
+TALER_PQ_query_param_blind_sign_pub (
+  const struct GNUNET_CRYPTO_BlindSignPublicKey *public_key);
+
+
+/**
+ * Generate query parameter for a blind sign private key of variable size.
+ *
+ * @param private_key pointer to the query parameter to pass
+ */
+struct GNUNET_PQ_QueryParam
+TALER_PQ_query_param_blind_sign_priv (
+  const struct GNUNET_CRYPTO_BlindSignPrivateKey *private_key);
+
+
 /**
  * Currency amount expected, from a record-field of (DB)
  * taler_amount_with_currency type. The currency must be stored in the
@@ -298,6 +320,7 @@ TALER_PQ_result_spec_array_blinded_denom_sig (
   size_t *num,
   struct TALER_BlindedDenominationSignature **denom_sigs);
 
+
 /**
  * Array of blinded hashes of coin envelopes
  *
@@ -314,6 +337,7 @@ TALER_PQ_result_spec_array_blinded_coin_hash (
   size_t *num,
   struct TALER_BlindedCoinHashP **h_coin_evs);
 
+
 /**
  * Array of hashes of denominations
  *
@@ -330,6 +354,7 @@ TALER_PQ_result_spec_array_denom_hash (
   size_t *num,
   struct TALER_DenominationHashP **denom_hs);
 
+
 /**
  * Array of amounts
  *
@@ -349,6 +374,31 @@ TALER_PQ_result_spec_array_amount (
   struct TALER_Amount **amounts);
 
 
+/**
+ * Blind sign public key expected.
+ *
+ * @param name name of the field in the table
+ * @param[out] public_key where to store the denomination signature
+ * @return array entry for the result specification to use
+ */
+struct GNUNET_PQ_ResultSpec
+TALER_PQ_result_spec_blind_sign_pub (
+  const char *name,
+  struct GNUNET_CRYPTO_BlindSignPublicKey *public_key);
+
+
+/**
+ * Blind sign private key expected.
+ *
+ * @param name name of the field in the table
+ * @param[out] private_key where to store the denomination signature
+ * @return array entry for the result specification to use
+ */
+struct GNUNET_PQ_ResultSpec
+TALER_PQ_result_spec_blind_sign_priv (
+  const char *name,
+  struct GNUNET_CRYPTO_BlindSignPrivateKey *private_key);
+
 #endif  /* TALER_PQ_LIB_H_ */
 
 /* end of include/taler_pq_lib.h */
diff --git a/src/pq/pq_query_helper.c b/src/pq/pq_query_helper.c
index f6684451..4764f7d1 100644
--- a/src/pq/pq_query_helper.c
+++ b/src/pq/pq_query_helper.c
@@ -1191,4 +1191,203 @@ TALER_PQ_query_param_array_amount (
 }
 
 
+/**
+ * Function called to convert input argument into SQL parameters.
+ *
+ * @param cls closure
+ * @param data pointer to input argument
+ * @param data_len number of bytes in @a data (if applicable)
+ * @param[out] param_values SQL data to set
+ * @param[out] param_lengths SQL length data to set
+ * @param[out] param_formats SQL format data to set
+ * @param param_length number of entries available in the @a param_values, @a 
param_lengths and @a param_formats arrays
+ * @param[out] scratch buffer for dynamic allocations (to be done via 
#GNUNET_malloc()
+ * @param scratch_length number of entries left in @a scratch
+ * @return -1 on error, number of offsets used in @a scratch otherwise
+ */
+static int
+qconv_blind_sign_pub (void *cls,
+                      const void *data,
+                      size_t data_len,
+                      void *param_values[],
+                      int param_lengths[],
+                      int param_formats[],
+                      unsigned int param_length,
+                      void *scratch[],
+                      unsigned int scratch_length)
+{
+  const struct GNUNET_CRYPTO_BlindSignPublicKey *public_key = data;
+  size_t tlen;
+  size_t len;
+  uint32_t be;
+  char *buf;
+  void *tbuf;
+
+  (void) cls;
+  (void) data_len;
+  GNUNET_assert (1 == param_length);
+  GNUNET_assert (scratch_length > 0);
+  GNUNET_break (NULL == cls);
+  be = htonl ((uint32_t) public_key->cipher);
+  switch (public_key->cipher)
+  {
+  case GNUNET_CRYPTO_BSA_RSA:
+    tlen = GNUNET_CRYPTO_rsa_public_key_encode (
+      public_key->details.rsa_public_key,
+      &tbuf);
+    break;
+  case GNUNET_CRYPTO_BSA_CS:
+    tlen = sizeof (public_key->details.cs_public_key);
+    break;
+  default:
+    GNUNET_assert (0);
+  }
+  len = tlen + sizeof (be);
+  buf = GNUNET_malloc (len);
+  GNUNET_memcpy (buf,
+                 &be,
+                 sizeof (be));
+  switch (public_key->cipher)
+  {
+  case GNUNET_CRYPTO_BSA_RSA:
+    GNUNET_memcpy (&buf[sizeof (be)],
+                   tbuf,
+                   tlen);
+    GNUNET_free (tbuf);
+    break;
+  case GNUNET_CRYPTO_BSA_CS:
+    GNUNET_memcpy (&buf[sizeof (be)],
+                   &public_key->details.cs_public_key,
+                   tlen);
+    break;
+  default:
+    GNUNET_assert (0);
+  }
+
+  scratch[0] = buf;
+  param_values[0] = (void *) buf;
+  param_lengths[0] = len;
+  param_formats[0] = 1;
+  return 1;
+}
+
+/**
+ * Generate query parameter for a blind sign public key of variable size.
+ *
+ * @param public_key pointer to the query parameter to pass
+ */
+struct GNUNET_PQ_QueryParam
+TALER_PQ_query_param_blind_sign_pub (
+  const struct GNUNET_CRYPTO_BlindSignPublicKey *public_key)
+{
+  struct GNUNET_PQ_QueryParam res = {
+    .conv = &qconv_blind_sign_pub,
+    .data = public_key,
+    .num_params = 1
+  };
+
+  return res;
+}
+
+
+/**
+ * Function called to convert input argument into SQL parameters.
+ *
+ * @param cls closure
+ * @param data pointer to input argument
+ * @param data_len number of bytes in @a data (if applicable)
+ * @param[out] param_values SQL data to set
+ * @param[out] param_lengths SQL length data to set
+ * @param[out] param_formats SQL format data to set
+ * @param param_length number of entries available in the @a param_values, @a 
param_lengths and @a param_formats arrays
+ * @param[out] scratch buffer for dynamic allocations (to be done via 
#GNUNET_malloc()
+ * @param scratch_length number of entries left in @a scratch
+ * @return -1 on error, number of offsets used in @a scratch otherwise
+ */
+static int
+qconv_blind_sign_priv (void *cls,
+                       const void *data,
+                       size_t data_len,
+                       void *param_values[],
+                       int param_lengths[],
+                       int param_formats[],
+                       unsigned int param_length,
+                       void *scratch[],
+                       unsigned int scratch_length)
+{
+  const struct GNUNET_CRYPTO_BlindSignPrivateKey *private_key = data;
+  size_t tlen;
+  size_t len;
+  uint32_t be;
+  char *buf;
+  void *tbuf;
+
+  (void) cls;
+  (void) data_len;
+  GNUNET_assert (1 == param_length);
+  GNUNET_assert (scratch_length > 0);
+  GNUNET_break (NULL == cls);
+  be = htonl ((uint32_t) private_key->cipher);
+  switch (private_key->cipher)
+  {
+  case GNUNET_CRYPTO_BSA_RSA:
+    tlen = GNUNET_CRYPTO_rsa_private_key_encode (
+      private_key->details.rsa_private_key,
+      &tbuf);
+    break;
+  case GNUNET_CRYPTO_BSA_CS:
+    tlen = sizeof (private_key->details.cs_private_key);
+    break;
+  default:
+    GNUNET_assert (0);
+  }
+  len = tlen + sizeof (be);
+  buf = GNUNET_malloc (len);
+  GNUNET_memcpy (buf,
+                 &be,
+                 sizeof (be));
+  switch (private_key->cipher)
+  {
+  case GNUNET_CRYPTO_BSA_RSA:
+    GNUNET_memcpy (&buf[sizeof (be)],
+                   tbuf,
+                   tlen);
+    GNUNET_free (tbuf);
+    break;
+  case GNUNET_CRYPTO_BSA_CS:
+    GNUNET_memcpy (&buf[sizeof (be)],
+                   &private_key->details.cs_private_key,
+                   tlen);
+    break;
+  default:
+    GNUNET_assert (0);
+  }
+
+  scratch[0] = buf;
+  param_values[0] = (void *) buf;
+  param_lengths[0] = len;
+  param_formats[0] = 1;
+  return 1;
+}
+
+
+/**
+ * Generate query parameter for a blind sign private key of variable size.
+ *
+ * @param private_key pointer to the query parameter to pass
+ */
+struct GNUNET_PQ_QueryParam
+TALER_PQ_query_param_blind_sign_priv (
+  const struct GNUNET_CRYPTO_BlindSignPrivateKey *private_key)
+{
+  struct GNUNET_PQ_QueryParam res = {
+    .conv = &qconv_blind_sign_priv,
+    .data = private_key,
+    .num_params = 1
+  };
+
+  return res;
+}
+
+
 /* end of pq/pq_query_helper.c */

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