Couchbase C Client
2.10.7
Asynchronous C Client for Couchbase
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Shows how to use field-encryption API to decrypt JSON values.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef _WIN32
#define PRIx64 "I64x"
#else
#include <inttypes.h>
#endif
#include "openssl_symmetric_provider.h"
{
fprintf(stderr,
"%s. Received code 0x%X (%s)\n", msg, err,
lcb_strerror(instance, err));
exit(EXIT_FAILURE);
}
{
field.
alg =
"AES-256-HMAC-SHA256";
die(instance, "Couldn't decrypt field 'message'", err);
}
die(instance,
"Crypto provider returned success, but document is NULL",
LCB_EINVAL);
}
if (dcmd.
out[dcmd.
nout - 1] ==
'\n') {
}
printf(
"PLAIN: %.*s\n", (
int)dcmd.
nout, dcmd.
out);
printf(
"CAS: 0x%" PRIx64
"\n", rb->
cas);
} else {
}
}
static void get_encrypted(
lcb_t instance,
const char *key)
{
printf("KEY: %s\n", key);
die(instance, "Couldn't schedule get operation", err);
}
}
int main(int argc, char *argv[])
{
{
if (argc < 2) {
fprintf(stderr, "Usage: %s couchbase://host/bucket [ password [ username ] ]\n", argv[0]);
exit(EXIT_FAILURE);
}
if (argc > 2) {
}
if (argc > 3) {
}
die(NULL, "Couldn't create couchbase handle", err);
}
die(instance, "Couldn't schedule connection", err);
}
die(instance, "Couldn't bootstrap from cluster", err);
}
}
get_encrypted(instance, "secret-1");
printf("\n");
get_encrypted(instance, "secret-2");
printf("\n");
get_encrypted(instance, "secret-3");
printf("\n");
get_encrypted(instance, "secret-4");
printf("\n");
get_encrypted(instance, "secret-5");
return 0;
}
size_t nout
size of the output JSON document
Definition: crypto.h:159
Command for retrieving a single item.
Definition: couchbase.h:840
lcb_error_t lcb_wait(lcb_t instance)
Wait for the execution of all batched requests.
const char * lcb_strerror(lcb_t instance, lcb_error_t error)
Get a textual descrtiption for the given error code.
const void * value
Value buffer for the item.
Definition: couchbase.h:854
const char * passwd
Password for bucket.
Definition: couchbase.h:293
lcb_error_t lcb_get_bootstrap_status(lcb_t instance)
Gets the initial bootstrap status.
const char * doc
pointer to the input JSON document
Definition: crypto.h:156
const char * connstr
Connection string.
Definition: couchbase.h:282
lcb_error_t lcb_connect(lcb_t instance)
Schedule the initial connection This function will schedule the initial connection for the handle.
const char * username
Username to use for authentication.
Definition: couchbase.h:288
lcb_SIZE nvalue
Length of value.
Definition: couchbase.h:855
lcb_error_t
Error codes returned by the library.
Definition: error.h:476
lcb_CAS cas
CAS for response (if applicable)
Definition: couchbase.h:626
lcb_error_t rc
Status code.
Definition: couchbase.h:626
struct lcb_create_st3 v3
Use this field.
Definition: couchbase.h:338
lcb_error_t lcb_get3(lcb_t instance, const void *cookie, const lcb_CMDGET *cmd)
Spool a single get operation.
void lcbcrypto_register(lcb_t instance, const char *name, lcbcrypto_PROVIDER *provider)
Register crypto-provider for specified alias.
const char * lcb_strcbtype(int cbtype)
Returns the type of the callback as a string.
lcbcrypto_FIELDSPEC * fields
list of field specs
Definition: crypto.h:160
Wrapper structure for lcb_create()
Definition: couchbase.h:328
size_t nfields
number of field specs
Definition: crypto.h:161
uint16_t version
version of the structure, currently valid value is 0
Definition: crypto.h:154
#define LCB_CMD_SET_KEY(cmd, keybuf, keylen)
Set the key for the command.
Definition: couchbase.h:556
struct lcb_st * lcb_t
Definition: couchbase.h:41
@ LCB_CALLBACK_GET
lcb_get3()
Definition: couchbase.h:697
Response structure when retrieving a single item.
Definition: couchbase.h:852
lcb_error_t lcb_create(lcb_t *instance, const struct lcb_create_st *options)
Create an instance of lcb.
@ LCB_SUCCESS
Success.
Definition: error.h:478
Base response structure for callbacks.
Definition: couchbase.h:625
char * out
pointer to output JSON document.
Definition: crypto.h:158
void lcb_destroy(lcb_t instance)
Destroy (and release all allocated resources) an instance of lcb.
const char * alg
crypto provider alias (NUL-terminated)
Definition: crypto.h:125
lcb_error_t lcbcrypto_decrypt_fields(lcb_t instance, lcbcrypto_CMDDECRYPT *cmd)
Decrypt all specified fields in the JSON encoded object.
const char * prefix
prefix to encrypted field.
Definition: crypto.h:155
Command to decrypt JSON fields.
Definition: crypto.h:153
int version
Indicates which field in the lcb_CRST_u union should be used.
Definition: couchbase.h:330
lcb_RESPCALLBACK lcb_install_callback3(lcb_t instance, int cbtype, lcb_RESPCALLBACK cb)
@ LCB_EINVAL
If returned from an API call, it indicates invalid values were passed to the function.
Definition: error.h:478
size_t ndoc
size of the input JSON document
Definition: crypto.h:157
Structure for JSON field specification for encrypt/decrypt API.
Definition: crypto.h:123
const char * name
field name (NUL-terminated)
Definition: crypto.h:124