c-ipfs/test/cid/test_cid.h

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#include <string.h>
#include "mh/hashes.h"
#include "mh/multihash.h"
#include "ipfs/cid/cid.h"
#include "ipfs/multibase/multibase.h"
#include "libp2p/crypto/sha256.h"
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int test_cid_new_free() {
unsigned char* hash = (unsigned char*)"ABC123";
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struct Cid* cid = ipfs_cid_new(0, hash, strlen((char*)hash), CID_DAG_PROTOBUF);
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if (cid == NULL)
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return 0;
if (cid->version != 0)
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return 0;
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if (cid->codec != CID_DAG_PROTOBUF)
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return 0;
if (cid->hash_length != strlen((char*)hash))
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return 0;
if (strncmp((char*)cid->hash, (char*)hash, 6) != 0)
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return 0;
return ipfs_cid_free(cid);
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}
/***
* Test sending a multibase encoded multihash into cid_cast method
* that should return a Cid struct
*/
int test_cid_cast_multihash() {
// first, build a multihash
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char* string_to_hash = "Hello, World!";
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unsigned char hashed[32];
memset(hashed, 0, 32);
// hash the string
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libp2p_crypto_hashing_sha256((unsigned char*)string_to_hash, strlen(string_to_hash), hashed);
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size_t multihash_size = mh_new_length(MH_H_SHA2_256, 32);
unsigned char multihash[multihash_size];
memset(multihash, 0, multihash_size);
unsigned char* ptr = multihash;
int retVal = mh_new(ptr, MH_H_SHA2_256, hashed, 32);
if (retVal < 0)
return 0;
// now call cast
struct Cid cid;
retVal = ipfs_cid_cast(multihash, multihash_size, &cid);
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if (retVal == 0)
return 0;
// check results
if (cid.version != 0)
return 0;
if (cid.hash_length != 32)
return 0;
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if (cid.codec != CID_DAG_PROTOBUF)
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return 0;
if (strncmp((char*)hashed, (char*)cid.hash, 32) != 0)
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return 0;
return 1;
}
int test_cid_cast_non_multihash() {
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// first, build a hash
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char* string_to_hash = "Hello, World!";
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unsigned char hashed[32];
memset(hashed, 0, 32);
// hash the string
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libp2p_crypto_hashing_sha256((unsigned char*)string_to_hash, strlen(string_to_hash), hashed);
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// now make it a hash with a version and codec embedded in varints before the hash
size_t array_size = 34; // 32 for the hash, 2 for the 2 varints
unsigned char array[array_size];
memset(array, 0, array_size);
// first the version
array[0] = 0;
// then the codec
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array[1] = CID_DAG_PROTOBUF;
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// then the hash
memcpy(&array[2], hashed, 32);
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// now call cast
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struct Cid cid;
int retVal = ipfs_cid_cast(array, array_size, &cid);
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if (retVal == 0)
return 0;
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// check results
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if (cid.version != 0)
return 0;
if (cid.hash_length != 32)
return 0;
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if (cid.codec != CID_DAG_PROTOBUF)
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return 0;
if (strncmp((char*)hashed, (char*)cid.hash, 32) != 0)
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return 0;
return 1;
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}
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int test_cid_protobuf_encode_decode() {
struct Cid tester;
tester.version = 1;
tester.codec = CID_ETHEREUM_BLOCK;
tester.hash = (unsigned char*)"ABC123";
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tester.hash_length = 6;
size_t bytes_written_to_buffer;
// encode
size_t buffer_length = ipfs_cid_protobuf_encode_size(&tester);
unsigned char buffer[buffer_length];
ipfs_cid_protobuf_encode(&tester, buffer, buffer_length, &bytes_written_to_buffer);
// decode
struct Cid* results;
ipfs_cid_protobuf_decode(buffer, bytes_written_to_buffer, &results);
// compare
if (tester.version != results->version) {
printf("Version %d does not match version %d\n", tester.version, results->version);
ipfs_cid_free(results);
return 0;
}
if (tester.codec != results->codec) {
printf("Codec %02x does not match %02x\n", tester.codec, results->codec);
ipfs_cid_free(results);
return 0;
}
if (tester.hash_length != results->hash_length) {
printf("Hash length %d does not match %d\n", (int)tester.hash_length, (int)results->hash_length);
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ipfs_cid_free(results);
return 0;
}
for(int i = 0; i < 6; i++) {
if (tester.hash[i] != results->hash[i]) {
printf("Hash character %c does not match %c at position %d", tester.hash[i], results->hash[i], i);
ipfs_cid_free(results);
return 0;
}
}
ipfs_cid_free(results);
return 1;
}