int KSI_Integer_fromTlv(KSI_TLV *tlv, KSI_Integer **o) {
int res = KSI_UNKNOWN_ERROR;
KSI_CTX *ctx = NULL;
KSI_Integer *tmp = NULL;
const unsigned char *raw = NULL;
size_t len;
size_t i;
KSI_uint64_t val = 0;
ctx = KSI_TLV_getCtx(tlv);
KSI_ERR_clearErrors(ctx);
if (tlv == NULL || o == NULL) {
KSI_pushError(ctx, res = KSI_INVALID_ARGUMENT, NULL);
goto cleanup;
}
res = KSI_TLV_getRawValue(tlv, &raw, &len);
if (res != KSI_OK) {
KSI_pushError(ctx, res, NULL);
goto cleanup;
}
if (len > 8) {
KSI_pushError(ctx, res = KSI_INVALID_FORMAT, "Integer larger than 64bit");
goto cleanup;
}
/* Encode the up-to 64bit unsigned integer. */
for (i = 0; i < len; i++) {
val = val << 8 | raw[i];
}
/* Make sure the integer was coded properly. */
if (len != KSI_UINT64_MINSIZE(val)) {
KSI_pushError(ctx, res = KSI_INVALID_FORMAT, "Integer not properly formated.");
goto cleanup;
}
res = KSI_Integer_new(ctx, val, &tmp);
if (res != KSI_OK) {
KSI_pushError(ctx, res, NULL);
goto cleanup;
}
*o = tmp;
tmp = NULL;
res = KSI_OK;
cleanup:
KSI_nofree(ctx);
KSI_Integer_free(tmp);
return res;
}
static int publicationsFileTLV_getSignatureTLVLength(KSI_TLV *pubFileTlv, size_t *len) {
int res;
KSI_TLVList *list = NULL;
KSI_TLV *tlvSig = NULL;
const unsigned char *raw = NULL;
size_t raw_len;
size_t sig_len;
KSI_CTX *ctx = NULL;
if (pubFileTlv == NULL && len == NULL) {
KSI_pushError(ctx, res = KSI_INVALID_ARGUMENT, NULL);
goto cleanup;
}
ctx = KSI_TLV_getCtx(pubFileTlv);
KSI_ERR_clearErrors(ctx);
res = KSI_TLV_getNestedList(pubFileTlv, &list);
if (res != KSI_OK) {
KSI_pushError(ctx, res, NULL);
goto cleanup;
}
res = KSI_TLVList_elementAt(list, KSI_TLVList_length(list) - 1, &tlvSig);
if (res != KSI_OK) {
KSI_pushError(ctx, res, NULL);
goto cleanup;
}
if (KSI_TLV_getTag(tlvSig) != 0x704) {
KSI_pushError(ctx, res, "Last TLV in publications file must be signature (0x704)");
goto cleanup;
}
res = KSI_TLV_getRawValue(tlvSig, &raw, &raw_len);
if (res != KSI_OK) {
KSI_pushError(ctx, res, NULL);
goto cleanup;
}
sig_len = raw_len;
sig_len += 4;
*len = sig_len;
cleanup:
return res;
}
int KSI_PKISignature_fromTlv(KSI_TLV *tlv, KSI_PKISignature **sig) {
KSI_CTX *ctx = NULL;
int res = KSI_UNKNOWN_ERROR;
KSI_PKISignature *tmp = NULL;
const unsigned char *raw = NULL;
unsigned int raw_len = 0;
if (tlv == NULL || sig == NULL){
res = KSI_INVALID_ARGUMENT;
goto cleanup;
}
ctx = KSI_TLV_getCtx(tlv);
KSI_ERR_clearErrors(ctx);
res = KSI_TLV_getRawValue(tlv, &raw, &raw_len);
if (res != KSI_OK){
KSI_pushError(ctx, res, NULL);
goto cleanup;
}
res = KSI_PKISignature_new(ctx, raw, raw_len, &tmp);
if (res != KSI_OK){
KSI_pushError(ctx, res, NULL);
goto cleanup;
}
*sig = tmp;
tmp = NULL;
res = KSI_OK;
cleanup:
KSI_nofree(raw);
KSI_PKISignature_free(tmp);
return res;
}
int KSI_Utf8String_fromTlv(KSI_TLV *tlv, KSI_Utf8String **o) {
int res = KSI_UNKNOWN_ERROR;
KSI_CTX *ctx = NULL;
const char *cstr = NULL;
KSI_Utf8String *tmp = NULL;
size_t len;
ctx = KSI_TLV_getCtx(tlv);
KSI_ERR_clearErrors(ctx);
if (tlv == NULL || o == NULL) {
KSI_pushError(ctx, res = KSI_INVALID_ARGUMENT, NULL);
goto cleanup;
}
res = KSI_TLV_getRawValue(tlv, (const unsigned char **)&cstr, &len);
if (res != KSI_OK) {
KSI_pushError(ctx, res, NULL);
goto cleanup;
}
res = KSI_Utf8String_new(ctx, cstr, len, &tmp);
if (res != KSI_OK) {
KSI_pushError(ctx, res, NULL);
goto cleanup;
}
*o = tmp;
tmp = NULL;
res = KSI_OK;
cleanup:
KSI_nofree(ctx);
KSI_nofree(cstr);
KSI_Utf8String_free(tmp);
return res;
}
int KSI_DataHash_fromTlv(KSI_TLV *tlv, KSI_DataHash **hsh) {
int res = KSI_UNKNOWN_ERROR;
KSI_CTX *ctx = NULL;
const unsigned char *raw = NULL;
size_t raw_len = 0;
KSI_DataHash *tmp = NULL;
ctx = KSI_TLV_getCtx(tlv);
KSI_ERR_clearErrors(ctx);
if (tlv == NULL || hsh == NULL) {
res = KSI_INVALID_ARGUMENT;
goto cleanup;
}
res = KSI_TLV_getRawValue(tlv, &raw, &raw_len);
if (res != KSI_OK) {
KSI_pushError(ctx, res, NULL);
goto cleanup;
}
res = KSI_DataHash_fromImprint(ctx, raw, raw_len, &tmp);
if (res != KSI_OK) {
KSI_pushError(ctx, res, NULL);
goto cleanup;
}
*hsh = tmp;
tmp = NULL;
res = KSI_OK;
cleanup:
KSI_nofree(ctx);
KSI_nofree(raw);
KSI_DataHash_free(tmp);
return res;
}
int KSI_PublicationsFile_serialize(KSI_CTX *ctx, KSI_PublicationsFile *pubFile, char **raw, size_t *raw_len) {
int res;
const unsigned char *buf = NULL;
size_t buf_len = 0;
KSI_TLV *tlv = NULL;
unsigned char *tmp = NULL;
size_t tmp_len = 0;
size_t sig_len = 0;
KSI_ERR_clearErrors(ctx);
if (ctx == NULL || pubFile == 0 || raw == NULL || raw_len == NULL) {
KSI_pushError(ctx, res = KSI_INVALID_ARGUMENT, NULL);
goto cleanup;
}
/**
* Create TLV 0x700 that contains nested list of publication file TLVs.
* Calculate signed data length assuming that signature TLV is always the last.
*/
res = KSI_TLV_new(ctx, 0x700, 0, 0, &tlv);
if (res != KSI_OK) {
KSI_pushError(ctx, res, NULL);
goto cleanup;
}
res = KSI_TlvTemplate_construct(ctx, tlv, pubFile, KSI_TLV_TEMPLATE(KSI_PublicationsFile));
if (res != KSI_OK) {
KSI_pushError(ctx, res, NULL);
goto cleanup;
}
res = publicationsFileTLV_getSignatureTLVLength(tlv, &sig_len);
if (res != KSI_OK) {
KSI_pushError(ctx, res, NULL);
goto cleanup;
}
res = KSI_TLV_getRawValue(tlv, &buf, &buf_len);
if (res != KSI_OK) {
KSI_pushError(ctx, res, NULL);
goto cleanup;
}
/**
* Append raw value to publication file header. Copy raw publication file into
* internal and external buffer.
*/
tmp_len = buf_len + sizeof(PUB_FILE_HEADER_ID) - 1;
tmp = (unsigned char *) KSI_malloc(tmp_len);
if (tmp == NULL) {
KSI_pushError(ctx, res = KSI_OUT_OF_MEMORY, NULL);
goto cleanup;
}
if (KSI_strncpy((char *)tmp, PUB_FILE_HEADER_ID, tmp_len) == NULL) {
KSI_pushError(ctx, res = KSI_UNKNOWN_ERROR, NULL);
goto cleanup;
}
memcpy(tmp + sizeof(PUB_FILE_HEADER_ID) - 1, buf, buf_len);
if (pubFile->raw != NULL) KSI_free(pubFile->raw);
pubFile->raw = tmp;
pubFile->raw_len = tmp_len;
pubFile->signedDataLength = tmp_len - sig_len;
tmp = NULL;
tmp = (unsigned char *) KSI_malloc(pubFile->raw_len);
if (tmp == NULL) {
KSI_pushError(ctx, res = KSI_OUT_OF_MEMORY, NULL);
goto cleanup;
}
memcpy(tmp, pubFile->raw, pubFile->raw_len);
*raw = (char *)tmp;
*raw_len = pubFile->raw_len;
tmp = NULL;
res = KSI_OK;
cleanup:
KSI_TLV_free(tlv);
KSI_free(tmp);
return res;
}
