diff options
Diffstat (limited to 'libs/libsignal/src/fingerprint.c')
| -rw-r--r-- | libs/libsignal/src/fingerprint.c | 851 |
1 files changed, 851 insertions, 0 deletions
diff --git a/libs/libsignal/src/fingerprint.c b/libs/libsignal/src/fingerprint.c new file mode 100644 index 0000000000..1058e90571 --- /dev/null +++ b/libs/libsignal/src/fingerprint.c @@ -0,0 +1,851 @@ +#include "fingerprint.h" + +#include <assert.h> +#include <string.h> + +#include "FingerprintProtocol.pb-c.h" +#include "signal_protocol_internal.h" +#include "vpool.h" + +#define FINGERPRINT_VERSION 0 +#define FINGERPRINT_LENGTH 30 + +#define MAX(a,b) (((a)>(b))?(a):(b)) + +struct fingerprint +{ + signal_type_base base; + displayable_fingerprint *displayable; + scannable_fingerprint *scannable; +}; + +struct displayable_fingerprint +{ + signal_type_base base; + char *local_fingerprint; + char *remote_fingerprint; + char *display_text; +}; + +struct scannable_fingerprint +{ + signal_type_base base; + uint32_t version; + char *local_stable_identifier; + signal_buffer *local_fingerprint; + char *remote_stable_identifier; + signal_buffer *remote_fingerprint; +}; + +struct fingerprint_generator +{ + int iterations; + int scannable_version; + signal_context *global_context; +}; + +static int fingerprint_generator_get_logical_key_bytes(signal_buffer **key_bytes, + const ec_public_key_list *unsorted_key_list); + +static int fingerprint_generator_create_for_impl(fingerprint_generator *generator, + const char *local_stable_identifier, const signal_buffer *local_identity_buffer, + const char *remote_stable_identifier, const signal_buffer *remote_identity_buffer, + fingerprint **fingerprint_val); + +static int fingerprint_generator_get_fingerprint(fingerprint_generator *generator, signal_buffer **fingerprint_buffer, + const char *stable_identifier, const signal_buffer *identity_buffer); + +static int fingerprint_generator_create_display_string(fingerprint_generator *generator, + char **display_string, signal_buffer *fingerprint_buffer); + +int fingerprint_generator_create(fingerprint_generator **generator, + int iterations, int scannable_version, + signal_context *global_context) +{ + fingerprint_generator *result_generator; + + assert(global_context); + + if(scannable_version < 0 || scannable_version > 1) { + return SG_ERR_INVAL; + } + + result_generator = malloc(sizeof(fingerprint_generator)); + if(!result_generator) { + return SG_ERR_NOMEM; + } + memset(result_generator, 0, sizeof(fingerprint_generator)); + + result_generator->iterations = iterations; + result_generator->scannable_version = scannable_version; + result_generator->global_context = global_context; + + *generator = result_generator; + return 0; +} + +int fingerprint_generator_create_for(fingerprint_generator *generator, + const char *local_stable_identifier, const ec_public_key *local_identity_key, + const char *remote_stable_identifier, const ec_public_key *remote_identity_key, + fingerprint **fingerprint_val) +{ + int result = 0; + signal_buffer *local_key_buffer = 0; + signal_buffer *remote_key_buffer = 0; + + result = ec_public_key_serialize(&local_key_buffer, local_identity_key); + if(result < 0) { + goto complete; + } + + result = ec_public_key_serialize(&remote_key_buffer, remote_identity_key); + if(result < 0) { + goto complete; + } + + result = fingerprint_generator_create_for_impl(generator, + local_stable_identifier, local_key_buffer, + remote_stable_identifier, remote_key_buffer, + fingerprint_val); + +complete: + signal_buffer_free(local_key_buffer); + signal_buffer_free(remote_key_buffer); + return result; +} + +int fingerprint_generator_create_for_list(fingerprint_generator *generator, + const char *local_stable_identifier, const ec_public_key_list *local_identity_key_list, + const char *remote_stable_identifier, const ec_public_key_list *remote_identity_key_list, + fingerprint **fingerprint_val) +{ + int result = 0; + signal_buffer *local_key_buffer = 0; + signal_buffer *remote_key_buffer = 0; + + result = fingerprint_generator_get_logical_key_bytes(&local_key_buffer, local_identity_key_list); + if(result < 0) { + goto complete; + } + + result = fingerprint_generator_get_logical_key_bytes(&remote_key_buffer, remote_identity_key_list); + if(result < 0) { + goto complete; + } + + result = fingerprint_generator_create_for_impl(generator, + local_stable_identifier, local_key_buffer, + remote_stable_identifier, remote_key_buffer, + fingerprint_val); + +complete: + signal_buffer_free(local_key_buffer); + signal_buffer_free(remote_key_buffer); + return result; +} + +int fingerprint_generator_create_for_impl(fingerprint_generator *generator, + const char *local_stable_identifier, const signal_buffer *local_identity_buffer, + const char *remote_stable_identifier, const signal_buffer *remote_identity_buffer, + fingerprint **fingerprint_val) +{ + int result = 0; + fingerprint *result_fingerprint = 0; + signal_buffer *local_fingerprint_buffer = 0; + signal_buffer *remote_fingerprint_buffer = 0; + displayable_fingerprint *displayable = 0; + char *displayable_local = 0; + char *displayable_remote = 0; + scannable_fingerprint *scannable = 0; + + result = fingerprint_generator_get_fingerprint(generator, + &local_fingerprint_buffer, local_stable_identifier, local_identity_buffer); + if(result < 0) { + goto complete; + } + + result = fingerprint_generator_get_fingerprint(generator, + &remote_fingerprint_buffer, remote_stable_identifier, remote_identity_buffer); + if(result < 0) { + goto complete; + } + + result = fingerprint_generator_create_display_string(generator, &displayable_local, + local_fingerprint_buffer); + if(result < 0) { + goto complete; + } + + result = fingerprint_generator_create_display_string(generator, &displayable_remote, + remote_fingerprint_buffer); + if(result < 0) { + goto complete; + } + + result = displayable_fingerprint_create(&displayable, displayable_local, displayable_remote); + if(result < 0) { + goto complete; + } + + if(generator->scannable_version == 0) { + result = scannable_fingerprint_create(&scannable, 0, + local_stable_identifier, local_identity_buffer, + remote_stable_identifier, remote_identity_buffer); + } + else if(generator->scannable_version == 1) { + result = scannable_fingerprint_create(&scannable, 1, + 0, local_fingerprint_buffer, + 0, remote_fingerprint_buffer); + } + else { + result = SG_ERR_INVAL; + } + if(result < 0) { + goto complete; + } + + result = fingerprint_create(&result_fingerprint, displayable, scannable); + +complete: + signal_buffer_free(local_fingerprint_buffer); + signal_buffer_free(remote_fingerprint_buffer); + if(displayable_local) { + free(displayable_local); + } + if(displayable_remote) { + free(displayable_remote); + } + SIGNAL_UNREF(displayable); + SIGNAL_UNREF(scannable); + if(result >= 0) { + *fingerprint_val = result_fingerprint; + } + return result; +} + +int fingerprint_generator_get_logical_key_bytes(signal_buffer **key_bytes, + const ec_public_key_list *unsorted_key_list) +{ + int result = 0; + ec_public_key_list *sorted_key_list = 0; + ec_public_key *key_element = 0; + unsigned int list_size = 0; + unsigned int i = 0; + struct vpool vp; + signal_buffer *buffer = 0; + + vpool_init(&vp, 1024, 0); + + sorted_key_list = ec_public_key_list_copy(unsorted_key_list); + if(!sorted_key_list) { + result = SG_ERR_NOMEM; + goto complete; + } + + ec_public_key_list_sort(sorted_key_list); + list_size = ec_public_key_list_size(sorted_key_list); + + for(i = 0; i < list_size; i++) { + key_element = ec_public_key_list_at(sorted_key_list, i); + + result = ec_public_key_serialize(&buffer, key_element); + if (result < 0) { + goto complete; + } + + if(!vpool_insert(&vp, vpool_get_length(&vp), + signal_buffer_data(buffer), signal_buffer_len(buffer))) { + result = SG_ERR_NOMEM; + goto complete; + } + + signal_buffer_free(buffer); + buffer = 0; + } + + buffer = signal_buffer_create(vpool_get_buf(&vp), vpool_get_length(&vp)); + if(!buffer) { + result = SG_ERR_NOMEM; + goto complete; + } + +complete: + ec_public_key_list_free(sorted_key_list); + vpool_final(&vp); + if(result >= 0) { + *key_bytes = buffer; + } + else { + signal_buffer_free(buffer); + } + return result; +} + +int fingerprint_generator_get_fingerprint(fingerprint_generator *generator, signal_buffer **fingerprint_buffer, + const char *stable_identifier, const signal_buffer *identity_buffer) +{ + int result = 0; + void *digest_context = 0; + signal_buffer *hash_buffer = 0; + signal_buffer *hash_out_buffer = 0; + uint8_t *data = 0; + size_t len = 0; + int i = 0; + + assert(generator); + assert(stable_identifier); + assert(identity_buffer); + + result = signal_sha512_digest_init(generator->global_context, &digest_context); + if(result < 0) { + goto complete; + } + + len = 2 + signal_buffer_len(identity_buffer) + strlen(stable_identifier); + + hash_buffer = signal_buffer_alloc(len); + if(!hash_buffer) { + result = SG_ERR_NOMEM; + goto complete; + } + + data = signal_buffer_data(hash_buffer); + + memset(data, 0, len); + + data[0] = 0; + data[1] = (uint8_t)FINGERPRINT_VERSION; + memcpy(data + 2, signal_buffer_const_data(identity_buffer), signal_buffer_len(identity_buffer)); + memcpy(data + 2 + signal_buffer_len(identity_buffer), stable_identifier, strlen(stable_identifier)); + + for(i = 0; i < generator->iterations; i++) { + data = signal_buffer_data(hash_buffer); + len = signal_buffer_len(hash_buffer); + + result = signal_sha512_digest_update(generator->global_context, + digest_context, data, len); + if(result < 0) { + goto complete; + } + + result = signal_sha512_digest_update(generator->global_context, + digest_context, + signal_buffer_const_data(identity_buffer), + signal_buffer_len(identity_buffer)); + if(result < 0) { + goto complete; + } + + result = signal_sha512_digest_final(generator->global_context, + digest_context, &hash_out_buffer); + if(result < 0) { + goto complete; + } + + signal_buffer_free(hash_buffer); + hash_buffer = hash_out_buffer; + hash_out_buffer = 0; + } + + len = signal_buffer_len(hash_buffer); + + if(len < FINGERPRINT_LENGTH) { + result = SG_ERR_UNKNOWN; + goto complete; + } + +complete: + if(digest_context) { + signal_sha512_digest_cleanup(generator->global_context, digest_context); + } + if(result >= 0) { + *fingerprint_buffer = hash_buffer; + } + else { + signal_buffer_free(hash_buffer); + } + return result; +} + +int fingerprint_generator_create_display_string(fingerprint_generator *generator, + char **display_string, signal_buffer *fingerprint_buffer) +{ + int result = 0; + char *result_string = 0; + uint8_t *data = 0; + size_t len = 0; + int i = 0; + + assert(generator); + assert(fingerprint_buffer); + + data = signal_buffer_data(fingerprint_buffer); + len = signal_buffer_len(fingerprint_buffer); + + if(len < FINGERPRINT_LENGTH) { + result = SG_ERR_UNKNOWN; + goto complete; + } + + result_string = malloc(FINGERPRINT_LENGTH+1); + if(!result_string) { + result = SG_ERR_NOMEM; + goto complete; + } + + for(i = 0; i < FINGERPRINT_LENGTH; i += 5) { + uint64_t chunk = ((uint64_t)data[i] & 0xFFL) << 32 | + ((uint64_t)data[i + 1] & 0xFFL) << 24 | + ((uint64_t)data[i + 2] & 0xFFL) << 16 | + ((uint64_t)data[i + 3] & 0xFFL) << 8 | + ((uint64_t)data[i + 4] & 0xFFL); +#if _WINDOWS + sprintf_s(result_string + i, 6, "%05d", (int)(chunk % 100000)); +#else + snprintf(result_string + i, 6, "%05d", (int)(chunk % 100000)); +#endif + } + +complete: + if(result >= 0) { + *display_string = result_string; + } + return result; +} + +void fingerprint_generator_free(fingerprint_generator *generator) +{ + if(generator) { + free(generator); + } +} + +int fingerprint_create(fingerprint **fingerprint_val, displayable_fingerprint *displayable, scannable_fingerprint *scannable) +{ + fingerprint *result = malloc(sizeof(fingerprint)); + if(!result) { + return SG_ERR_NOMEM; + } + + memset(result, 0, sizeof(fingerprint)); + SIGNAL_INIT(result, fingerprint_destroy); + if(displayable) { + result->displayable = displayable; + SIGNAL_REF(displayable); + } + if(scannable) { + result->scannable = scannable; + SIGNAL_REF(scannable); + } + + *fingerprint_val = result; + + return 0; +} + +displayable_fingerprint *fingerprint_get_displayable(const fingerprint *fingerprint_val) +{ + assert(fingerprint_val); + return fingerprint_val->displayable; +} + +scannable_fingerprint *fingerprint_get_scannable(const fingerprint *fingerprint_val) +{ + assert(fingerprint_val); + return fingerprint_val->scannable; +} + +void fingerprint_destroy(signal_type_base *type) +{ + fingerprint *fingerprint_val = (fingerprint *)type; + SIGNAL_UNREF(fingerprint_val->displayable); + SIGNAL_UNREF(fingerprint_val->scannable); + free(fingerprint_val); +} + +int displayable_fingerprint_create(displayable_fingerprint **displayable, const char *local_fingerprint, const char *remote_fingerprint) +{ + int result = 0; + size_t local_len = 0; + size_t remote_len = 0; + displayable_fingerprint *result_displayable = 0; + char *display_text = 0; + + if(!local_fingerprint || !remote_fingerprint) { + return SG_ERR_INVAL; + } + + result_displayable = malloc(sizeof(displayable_fingerprint)); + if(!result_displayable) { + return SG_ERR_NOMEM; + } + + memset(result_displayable, 0, sizeof(displayable_fingerprint)); + SIGNAL_INIT(result_displayable, displayable_fingerprint_destroy); + + result_displayable->local_fingerprint = strdup(local_fingerprint); + if(!result_displayable->local_fingerprint) { + result = SG_ERR_NOMEM; + goto complete; + } + + result_displayable->remote_fingerprint = strdup(remote_fingerprint); + if(!result_displayable->remote_fingerprint) { + result = SG_ERR_NOMEM; + goto complete; + } + + local_len = strlen(local_fingerprint); + remote_len = strlen(remote_fingerprint); + + display_text = malloc(local_len + remote_len + 1); + if(!display_text) { + result = SG_ERR_NOMEM; + goto complete; + } + + if(strcmp(local_fingerprint, remote_fingerprint) <= 0) { + memcpy(display_text, local_fingerprint, local_len); + memcpy(display_text + local_len, remote_fingerprint, remote_len + 1); + } + else { + memcpy(display_text, remote_fingerprint, remote_len); + memcpy(display_text + remote_len, local_fingerprint, local_len + 1); + } + + result_displayable->display_text = display_text; + +complete: + if(result < 0) { + SIGNAL_UNREF(result_displayable); + } + else { + *displayable = result_displayable; + } + + return result; +} + +const char *displayable_fingerprint_local(const displayable_fingerprint *displayable) +{ + assert(displayable); + return displayable->local_fingerprint; +} + +const char *displayable_fingerprint_remote(const displayable_fingerprint *displayable) +{ + assert(displayable); + return displayable->remote_fingerprint; +} + +const char *displayable_fingerprint_text(const displayable_fingerprint *displayable) +{ + assert(displayable); + return displayable->display_text; +} + +void displayable_fingerprint_destroy(signal_type_base *type) +{ + displayable_fingerprint *displayable = (displayable_fingerprint *)type; + if(displayable->local_fingerprint) { + free(displayable->local_fingerprint); + } + if(displayable->remote_fingerprint) { + free(displayable->remote_fingerprint); + } + if(displayable->display_text) { + free(displayable->display_text); + } + free(displayable); +} + +int scannable_fingerprint_create(scannable_fingerprint **scannable, + uint32_t version, + const char *local_stable_identifier, const signal_buffer *local_fingerprint, + const char *remote_stable_identifier, const signal_buffer *remote_fingerprint) +{ + int result = 0; + scannable_fingerprint *result_scannable = 0; + + if(version == 0 && (!local_stable_identifier || !remote_stable_identifier)) { + return SG_ERR_INVAL; + } + + if(!local_fingerprint || !remote_fingerprint) { + return SG_ERR_INVAL; + } + + result_scannable = malloc(sizeof(scannable_fingerprint)); + if(!result_scannable) { + return SG_ERR_NOMEM; + } + + memset(result_scannable, 0, sizeof(scannable_fingerprint)); + SIGNAL_INIT(result_scannable, scannable_fingerprint_destroy); + + result_scannable->version = version; + + if(version == 0 && local_stable_identifier) { + result_scannable->local_stable_identifier = strdup(local_stable_identifier); + if(!result_scannable->local_stable_identifier) { + result = SG_ERR_NOMEM; + goto complete; + } + } + + if(version == 0) { + result_scannable->local_fingerprint = signal_buffer_copy(local_fingerprint); + } + else { + result_scannable->local_fingerprint = signal_buffer_n_copy(local_fingerprint, 32); + } + if(!result_scannable->local_fingerprint) { + result = SG_ERR_NOMEM; + goto complete; + } + + if(version == 0 && remote_stable_identifier) { + result_scannable->remote_stable_identifier = strdup(remote_stable_identifier); + if(!result_scannable->remote_stable_identifier) { + result = SG_ERR_NOMEM; + goto complete; + } + } + + if(version == 0) { + result_scannable->remote_fingerprint = signal_buffer_copy(remote_fingerprint); + } + else { + result_scannable->remote_fingerprint = signal_buffer_n_copy(remote_fingerprint, 32); + } + if(!result_scannable->remote_fingerprint) { + result = SG_ERR_NOMEM; + goto complete; + } + +complete: + if(result < 0) { + SIGNAL_UNREF(result_scannable); + } + else { + *scannable = result_scannable; + } + + return result; +} + +int scannable_fingerprint_serialize(signal_buffer **buffer, const scannable_fingerprint *scannable) +{ + int result = 0; + size_t result_size = 0; + signal_buffer *result_buf = 0; + Textsecure__CombinedFingerprints combined_fingerprint = TEXTSECURE__COMBINED_FINGERPRINTS__INIT; + Textsecure__LogicalFingerprint local_fingerprint = TEXTSECURE__LOGICAL_FINGERPRINT__INIT; + Textsecure__LogicalFingerprint remote_fingerprint = TEXTSECURE__LOGICAL_FINGERPRINT__INIT; + size_t len = 0; + uint8_t *data = 0; + + combined_fingerprint.version = scannable->version; + combined_fingerprint.has_version = 1; + + if(scannable->local_fingerprint) { + if(scannable->version == 0 && scannable->local_stable_identifier) { + signal_protocol_str_serialize_protobuf(&local_fingerprint.identifier, scannable->local_stable_identifier); + local_fingerprint.has_identifier = 1; + } + + local_fingerprint.content.data = signal_buffer_data(scannable->local_fingerprint); + local_fingerprint.content.len = signal_buffer_len(scannable->local_fingerprint); + local_fingerprint.has_content = 1; + + combined_fingerprint.localfingerprint = &local_fingerprint; + } + + if(scannable->remote_fingerprint) { + if(scannable->version == 0 && scannable->remote_stable_identifier) { + signal_protocol_str_serialize_protobuf(&remote_fingerprint.identifier, scannable->remote_stable_identifier); + remote_fingerprint.has_identifier = 1; + } + + remote_fingerprint.content.data = signal_buffer_data(scannable->remote_fingerprint); + remote_fingerprint.content.len = signal_buffer_len(scannable->remote_fingerprint); + remote_fingerprint.has_content = 1; + + combined_fingerprint.remotefingerprint = &remote_fingerprint; + } + + len = textsecure__combined_fingerprints__get_packed_size(&combined_fingerprint); + + result_buf = signal_buffer_alloc(len); + if(!result_buf) { + result = SG_ERR_NOMEM; + goto complete; + } + + data = signal_buffer_data(result_buf); + result_size = textsecure__combined_fingerprints__pack(&combined_fingerprint, data); + if(result_size != len) { + signal_buffer_free(result_buf); + result = SG_ERR_INVALID_PROTO_BUF; + result_buf = 0; + goto complete; + } + +complete: + if(result >= 0) { + *buffer = result_buf; + } + return result; +} + +int scannable_fingerprint_deserialize(scannable_fingerprint **scannable, const uint8_t *data, size_t len, signal_context *global_context) +{ + int result = 0; + Textsecure__CombinedFingerprints *combined_fingerprint = 0; + uint32_t version = 0; + char *local_stable_identifier = 0; + signal_buffer *local_fingerprint = 0; + char *remote_stable_identifier = 0; + signal_buffer *remote_fingerprint = 0; + + combined_fingerprint = textsecure__combined_fingerprints__unpack(0, len, data); + if(!combined_fingerprint) { + result = SG_ERR_INVALID_PROTO_BUF; + goto complete; + } + + if(combined_fingerprint->has_version) { + version = combined_fingerprint->version; + } + + if(combined_fingerprint->localfingerprint) { + if(combined_fingerprint->localfingerprint->has_identifier) { + local_stable_identifier = signal_protocol_str_deserialize_protobuf(&combined_fingerprint->localfingerprint->identifier); + if(!local_stable_identifier) { + result = SG_ERR_NOMEM; + goto complete; + } + } + if(combined_fingerprint->localfingerprint->has_content) { + local_fingerprint = signal_buffer_create( + combined_fingerprint->localfingerprint->content.data, + combined_fingerprint->localfingerprint->content.len); + if(!local_fingerprint) { + result = SG_ERR_NOMEM; + goto complete; + } + } + } + + if(combined_fingerprint->remotefingerprint) { + if(combined_fingerprint->remotefingerprint->has_identifier) { + remote_stable_identifier = signal_protocol_str_deserialize_protobuf(&combined_fingerprint->remotefingerprint->identifier); + if(!remote_stable_identifier) { + result = SG_ERR_NOMEM; + goto complete; + } + } + if(combined_fingerprint->remotefingerprint->has_content) { + remote_fingerprint = signal_buffer_create( + combined_fingerprint->remotefingerprint->content.data, + combined_fingerprint->remotefingerprint->content.len); + if(!remote_fingerprint) { + result = SG_ERR_NOMEM; + goto complete; + } + } + } + + result = scannable_fingerprint_create(scannable, version, + local_stable_identifier, local_fingerprint, + remote_stable_identifier, remote_fingerprint); + +complete: + if(combined_fingerprint) { + textsecure__combined_fingerprints__free_unpacked(combined_fingerprint, 0); + } + if(local_stable_identifier) { + free(local_stable_identifier); + } + if(remote_stable_identifier) { + free(remote_stable_identifier); + } + signal_buffer_free(local_fingerprint); + signal_buffer_free(remote_fingerprint); + return result; +} + +uint32_t scannable_fingerprint_get_version(const scannable_fingerprint *scannable) +{ + assert(scannable); + return scannable->version; +} + +const char *scannable_fingerprint_get_local_stable_identifier(const scannable_fingerprint *scannable) +{ + assert(scannable); + return scannable->local_stable_identifier; +} + +signal_buffer *scannable_fingerprint_get_local_fingerprint(const scannable_fingerprint *scannable) +{ + assert(scannable); + return scannable->local_fingerprint; +} + +const char *scannable_fingerprint_get_remote_stable_identifier(const scannable_fingerprint *scannable) +{ + assert(scannable); + return scannable->remote_stable_identifier; +} + +signal_buffer *scannable_fingerprint_get_remote_fingerprint(const scannable_fingerprint *scannable) +{ + assert(scannable); + return scannable->remote_fingerprint; +} + +int scannable_fingerprint_compare(const scannable_fingerprint *scannable, const scannable_fingerprint *other_scannable) +{ + if(!other_scannable->remote_fingerprint || !other_scannable->local_fingerprint || + other_scannable->version != scannable->version) { + return SG_ERR_FP_VERSION_MISMATCH; + } + + if(scannable->version == 0) { + if(strcmp(scannable->local_stable_identifier, other_scannable->remote_stable_identifier) != 0) { + return SG_ERR_FP_IDENT_MISMATCH; + } + + if(strcmp(scannable->remote_stable_identifier, other_scannable->local_stable_identifier) != 0) { + return SG_ERR_FP_IDENT_MISMATCH; + } + } + + if(signal_buffer_compare(scannable->local_fingerprint, other_scannable->remote_fingerprint) != 0) { + return 0; + } + + if(signal_buffer_compare(scannable->remote_fingerprint, other_scannable->local_fingerprint) != 0) { + return 0; + } + + return 1; +} + +void scannable_fingerprint_destroy(signal_type_base *type) +{ + scannable_fingerprint *scannable = (scannable_fingerprint *)type; + + if(scannable->local_stable_identifier) { + free(scannable->local_stable_identifier); + } + if(scannable->remote_stable_identifier) { + free(scannable->remote_stable_identifier); + } + + signal_buffer_free(scannable->local_fingerprint); + signal_buffer_free(scannable->remote_fingerprint); + + free(scannable); +} |