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|
/*
*
* Copyright 2015 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include "src/core/lib/security/credentials/jwt/json_token.h"
#include <openssl/evp.h>
#include <string.h>
#include <grpc/grpc_security.h>
#include <grpc/slice.h>
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include "src/core/lib/json/json.h"
#include "src/core/lib/security/credentials/oauth2/oauth2_credentials.h"
#include "src/core/lib/slice/b64.h"
#include "src/core/lib/slice/slice_internal.h"
#include "test/core/util/test_config.h"
/* This JSON key was generated with the GCE console and revoked immediately.
The identifiers have been changed as well.
Maximum size for a string literal is 509 chars in C89, yay! */
static const char test_json_key_str_part1[] =
"{ \"private_key\": \"-----BEGIN PRIVATE KEY-----"
"\\nMIICeAIBADANBgkqhkiG9w0BAQEFAASCAmIwggJeAgEAAoGBAOEvJsnoHnyHkXcp\\n7mJE"
"qg"
"WGjiw71NfXByguekSKho65FxaGbsnSM9SMQAqVk7Q2rG+I0OpsT0LrWQtZ\\nyjSeg/"
"rWBQvS4hle4LfijkP3J5BG+"
"IXDMP8RfziNRQsenAXDNPkY4kJCvKux2xdD\\nOnVF6N7dL3nTYZg+"
"uQrNsMTz9UxVAgMBAAECgYEAzbLewe1xe9vy+2GoSsfib+28\\nDZgSE6Bu/"
"zuFoPrRc6qL9p2SsnV7txrunTyJkkOnPLND9ABAXybRTlcVKP/sGgza\\n/"
"8HpCqFYM9V8f34SBWfD4fRFT+n/"
"73cfRUtGXdXpseva2lh8RilIQfPhNZAncenU\\ngqXjDvpkypEusgXAykECQQD+";
static const char test_json_key_str_part2[] =
"53XxNVnxBHsYb+AYEfklR96yVi8HywjVHP34+OQZ\\nCslxoHQM8s+"
"dBnjfScLu22JqkPv04xyxmt0QAKm9+vTdAkEA4ib7YvEAn2jXzcCI\\nEkoy2L/"
"XydR1GCHoacdfdAwiL2npOdnbvi4ZmdYRPY1LSTO058tQHKVXV7NLeCa3\\nAARh2QJBAMKeDA"
"G"
"W303SQv2cZTdbeaLKJbB5drz3eo3j7dDKjrTD9JupixFbzcGw\\n8FZi5c8idxiwC36kbAL6Hz"
"A"
"ZoX+ofI0CQE6KCzPJTtYNqyShgKAZdJ8hwOcvCZtf\\n6z8RJm0+"
"6YBd38lfh5j8mZd7aHFf6I17j5AQY7oPEc47TjJj/"
"5nZ68ECQQDvYuI3\\nLyK5fS8g0SYbmPOL9TlcHDOqwG0mrX9qpg5DC2fniXNSrrZ64GTDKdzZ"
"Y"
"Ap6LI9W\\nIqv4vr6y38N79TTC\\n-----END PRIVATE KEY-----\\n\", ";
static const char test_json_key_str_part3[] =
"\"private_key_id\": \"e6b5137873db8d2ef81e06a47289e6434ec8a165\", "
"\"client_email\": "
"\"777-abaslkan11hlb6nmim3bpspl31ud@developer.gserviceaccount."
"com\", \"client_id\": "
"\"777-abaslkan11hlb6nmim3bpspl31ud.apps.googleusercontent."
"com\", \"type\": \"service_account\" }";
/* Test refresh token. */
static const char test_refresh_token_str[] =
"{ \"client_id\": \"32555999999.apps.googleusercontent.com\","
" \"client_secret\": \"EmssLNjJy1332hD4KFsecret\","
" \"refresh_token\": \"1/Blahblasj424jladJDSGNf-u4Sua3HDA2ngjd42\","
" \"type\": \"authorized_user\"}";
static const char test_scope[] = "myperm1 myperm2";
static const char test_service_url[] = "https://foo.com/foo.v1";
static char* test_json_key_str(const char* bad_part3) {
const char* part3 =
bad_part3 != nullptr ? bad_part3 : test_json_key_str_part3;
size_t result_len = strlen(test_json_key_str_part1) +
strlen(test_json_key_str_part2) + strlen(part3);
char* result = static_cast<char*>(gpr_malloc(result_len + 1));
char* current = result;
strcpy(result, test_json_key_str_part1);
current += strlen(test_json_key_str_part1);
strcpy(current, test_json_key_str_part2);
current += strlen(test_json_key_str_part2);
strcpy(current, part3);
return result;
}
static void test_parse_json_key_success(void) {
char* json_string = test_json_key_str(nullptr);
grpc_auth_json_key json_key =
grpc_auth_json_key_create_from_string(json_string);
GPR_ASSERT(grpc_auth_json_key_is_valid(&json_key));
GPR_ASSERT(json_key.type != nullptr &&
strcmp(json_key.type, "service_account") == 0);
GPR_ASSERT(json_key.private_key_id != nullptr &&
strcmp(json_key.private_key_id,
"e6b5137873db8d2ef81e06a47289e6434ec8a165") == 0);
GPR_ASSERT(json_key.client_id != nullptr &&
strcmp(json_key.client_id,
"777-abaslkan11hlb6nmim3bpspl31ud.apps."
"googleusercontent.com") == 0);
GPR_ASSERT(json_key.client_email != nullptr &&
strcmp(json_key.client_email,
"777-abaslkan11hlb6nmim3bpspl31ud@developer."
"gserviceaccount.com") == 0);
GPR_ASSERT(json_key.private_key != nullptr);
gpr_free(json_string);
grpc_auth_json_key_destruct(&json_key);
}
static void test_parse_json_key_failure_bad_json(void) {
const char non_closing_part3[] =
"\"private_key_id\": \"e6b5137873db8d2ef81e06a47289e6434ec8a165\", "
"\"client_email\": "
"\"777-abaslkan11hlb6nmim3bpspl31ud@developer.gserviceaccount."
"com\", \"client_id\": "
"\"777-abaslkan11hlb6nmim3bpspl31ud.apps.googleusercontent."
"com\", \"type\": \"service_account\" ";
char* json_string = test_json_key_str(non_closing_part3);
grpc_auth_json_key json_key =
grpc_auth_json_key_create_from_string(json_string);
GPR_ASSERT(!grpc_auth_json_key_is_valid(&json_key));
gpr_free(json_string);
grpc_auth_json_key_destruct(&json_key);
}
static void test_parse_json_key_failure_no_type(void) {
const char no_type_part3[] =
"\"private_key_id\": \"e6b5137873db8d2ef81e06a47289e6434ec8a165\", "
"\"client_email\": "
"\"777-abaslkan11hlb6nmim3bpspl31ud@developer.gserviceaccount."
"com\", \"client_id\": "
"\"777-abaslkan11hlb6nmim3bpspl31ud.apps.googleusercontent."
"com\" }";
char* json_string = test_json_key_str(no_type_part3);
grpc_auth_json_key json_key =
grpc_auth_json_key_create_from_string(json_string);
GPR_ASSERT(!grpc_auth_json_key_is_valid(&json_key));
gpr_free(json_string);
grpc_auth_json_key_destruct(&json_key);
}
static void test_parse_json_key_failure_no_client_id(void) {
const char no_client_id_part3[] =
"\"private_key_id\": \"e6b5137873db8d2ef81e06a47289e6434ec8a165\", "
"\"client_email\": "
"\"777-abaslkan11hlb6nmim3bpspl31ud@developer.gserviceaccount."
"com\", "
"\"type\": \"service_account\" }";
char* json_string = test_json_key_str(no_client_id_part3);
grpc_auth_json_key json_key =
grpc_auth_json_key_create_from_string(json_string);
GPR_ASSERT(!grpc_auth_json_key_is_valid(&json_key));
gpr_free(json_string);
grpc_auth_json_key_destruct(&json_key);
}
static void test_parse_json_key_failure_no_client_email(void) {
const char no_client_email_part3[] =
"\"private_key_id\": \"e6b5137873db8d2ef81e06a47289e6434ec8a165\", "
"\"client_id\": "
"\"777-abaslkan11hlb6nmim3bpspl31ud.apps.googleusercontent."
"com\", \"type\": \"service_account\" }";
char* json_string = test_json_key_str(no_client_email_part3);
grpc_auth_json_key json_key =
grpc_auth_json_key_create_from_string(json_string);
GPR_ASSERT(!grpc_auth_json_key_is_valid(&json_key));
gpr_free(json_string);
grpc_auth_json_key_destruct(&json_key);
}
static void test_parse_json_key_failure_no_private_key_id(void) {
const char no_private_key_id_part3[] =
"\"client_email\": "
"\"777-abaslkan11hlb6nmim3bpspl31ud@developer.gserviceaccount."
"com\", \"client_id\": "
"\"777-abaslkan11hlb6nmim3bpspl31ud.apps.googleusercontent."
"com\", \"type\": \"service_account\" }";
char* json_string = test_json_key_str(no_private_key_id_part3);
grpc_auth_json_key json_key =
grpc_auth_json_key_create_from_string(json_string);
GPR_ASSERT(!grpc_auth_json_key_is_valid(&json_key));
gpr_free(json_string);
grpc_auth_json_key_destruct(&json_key);
}
static void test_parse_json_key_failure_no_private_key(void) {
const char no_private_key_json_string[] =
"{ \"private_key_id\": \"e6b5137873db8d2ef81e06a47289e6434ec8a165\", "
"\"client_email\": "
"\"777-abaslkan11hlb6nmim3bpspl31ud@developer.gserviceaccount."
"com\", \"client_id\": "
"\"777-abaslkan11hlb6nmim3bpspl31ud.apps.googleusercontent."
"com\", \"type\": \"service_account\" }";
grpc_auth_json_key json_key =
grpc_auth_json_key_create_from_string(no_private_key_json_string);
GPR_ASSERT(!grpc_auth_json_key_is_valid(&json_key));
grpc_auth_json_key_destruct(&json_key);
}
static grpc_json* parse_json_part_from_jwt(const char* str, size_t len,
char** scratchpad) {
grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
char* b64;
char* decoded;
grpc_json* json;
grpc_slice slice;
b64 = static_cast<char*>(gpr_malloc(len + 1));
strncpy(b64, str, len);
b64[len] = '\0';
slice = grpc_base64_decode(&exec_ctx, b64, 1);
GPR_ASSERT(!GRPC_SLICE_IS_EMPTY(slice));
decoded = static_cast<char*>(gpr_malloc(GRPC_SLICE_LENGTH(slice) + 1));
strncpy(decoded, (const char*)GRPC_SLICE_START_PTR(slice),
GRPC_SLICE_LENGTH(slice));
decoded[GRPC_SLICE_LENGTH(slice)] = '\0';
json = grpc_json_parse_string(decoded);
gpr_free(b64);
*scratchpad = decoded;
grpc_slice_unref(slice);
grpc_exec_ctx_finish(&exec_ctx);
return json;
}
static void check_jwt_header(grpc_json* header) {
grpc_json* ptr;
grpc_json* alg = nullptr;
grpc_json* typ = nullptr;
grpc_json* kid = nullptr;
for (ptr = header->child; ptr; ptr = ptr->next) {
if (strcmp(ptr->key, "alg") == 0) {
alg = ptr;
} else if (strcmp(ptr->key, "typ") == 0) {
typ = ptr;
} else if (strcmp(ptr->key, "kid") == 0) {
kid = ptr;
}
}
GPR_ASSERT(alg != nullptr);
GPR_ASSERT(alg->type == GRPC_JSON_STRING);
GPR_ASSERT(strcmp(alg->value, "RS256") == 0);
GPR_ASSERT(typ != nullptr);
GPR_ASSERT(typ->type == GRPC_JSON_STRING);
GPR_ASSERT(strcmp(typ->value, "JWT") == 0);
GPR_ASSERT(kid != nullptr);
GPR_ASSERT(kid->type == GRPC_JSON_STRING);
GPR_ASSERT(strcmp(kid->value, "e6b5137873db8d2ef81e06a47289e6434ec8a165") ==
0);
}
static void check_jwt_claim(grpc_json* claim, const char* expected_audience,
const char* expected_scope) {
gpr_timespec expiration = gpr_time_0(GPR_CLOCK_REALTIME);
gpr_timespec issue_time = gpr_time_0(GPR_CLOCK_REALTIME);
gpr_timespec parsed_lifetime;
grpc_json* iss = nullptr;
grpc_json* scope = nullptr;
grpc_json* aud = nullptr;
grpc_json* exp = nullptr;
grpc_json* iat = nullptr;
grpc_json* sub = nullptr;
grpc_json* ptr;
for (ptr = claim->child; ptr; ptr = ptr->next) {
if (strcmp(ptr->key, "iss") == 0) {
iss = ptr;
} else if (strcmp(ptr->key, "sub") == 0) {
sub = ptr;
} else if (strcmp(ptr->key, "scope") == 0) {
scope = ptr;
} else if (strcmp(ptr->key, "aud") == 0) {
aud = ptr;
} else if (strcmp(ptr->key, "exp") == 0) {
exp = ptr;
} else if (strcmp(ptr->key, "iat") == 0) {
iat = ptr;
}
}
GPR_ASSERT(iss != nullptr);
GPR_ASSERT(iss->type == GRPC_JSON_STRING);
GPR_ASSERT(
strcmp(
iss->value,
"777-abaslkan11hlb6nmim3bpspl31ud@developer.gserviceaccount.com") ==
0);
if (expected_scope != nullptr) {
GPR_ASSERT(scope != nullptr);
GPR_ASSERT(sub == nullptr);
GPR_ASSERT(scope->type == GRPC_JSON_STRING);
GPR_ASSERT(strcmp(scope->value, expected_scope) == 0);
} else {
/* Claims without scope must have a sub. */
GPR_ASSERT(scope == nullptr);
GPR_ASSERT(sub != nullptr);
GPR_ASSERT(sub->type == GRPC_JSON_STRING);
GPR_ASSERT(strcmp(iss->value, sub->value) == 0);
}
GPR_ASSERT(aud != nullptr);
GPR_ASSERT(aud->type == GRPC_JSON_STRING);
GPR_ASSERT(strcmp(aud->value, expected_audience) == 0);
GPR_ASSERT(exp != nullptr);
GPR_ASSERT(exp->type == GRPC_JSON_NUMBER);
expiration.tv_sec = strtol(exp->value, nullptr, 10);
GPR_ASSERT(iat != nullptr);
GPR_ASSERT(iat->type == GRPC_JSON_NUMBER);
issue_time.tv_sec = strtol(iat->value, nullptr, 10);
parsed_lifetime = gpr_time_sub(expiration, issue_time);
GPR_ASSERT(parsed_lifetime.tv_sec == grpc_max_auth_token_lifetime().tv_sec);
}
static void check_jwt_signature(const char* b64_signature, RSA* rsa_key,
const char* signed_data,
size_t signed_data_size) {
grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
EVP_MD_CTX* md_ctx = EVP_MD_CTX_create();
EVP_PKEY* key = EVP_PKEY_new();
grpc_slice sig = grpc_base64_decode(&exec_ctx, b64_signature, 1);
GPR_ASSERT(!GRPC_SLICE_IS_EMPTY(sig));
GPR_ASSERT(GRPC_SLICE_LENGTH(sig) == 128);
GPR_ASSERT(md_ctx != nullptr);
GPR_ASSERT(key != nullptr);
EVP_PKEY_set1_RSA(key, rsa_key);
GPR_ASSERT(
EVP_DigestVerifyInit(md_ctx, nullptr, EVP_sha256(), nullptr, key) == 1);
GPR_ASSERT(EVP_DigestVerifyUpdate(md_ctx, signed_data, signed_data_size) ==
1);
GPR_ASSERT(EVP_DigestVerifyFinal(md_ctx, GRPC_SLICE_START_PTR(sig),
GRPC_SLICE_LENGTH(sig)) == 1);
grpc_slice_unref_internal(&exec_ctx, sig);
if (key != nullptr) EVP_PKEY_free(key);
if (md_ctx != nullptr) EVP_MD_CTX_destroy(md_ctx);
grpc_exec_ctx_finish(&exec_ctx);
}
static char* service_account_creds_jwt_encode_and_sign(
const grpc_auth_json_key* key) {
return grpc_jwt_encode_and_sign(key, GRPC_JWT_OAUTH2_AUDIENCE,
grpc_max_auth_token_lifetime(), test_scope);
}
static char* jwt_creds_jwt_encode_and_sign(const grpc_auth_json_key* key) {
return grpc_jwt_encode_and_sign(key, test_service_url,
grpc_max_auth_token_lifetime(), nullptr);
}
static void service_account_creds_check_jwt_claim(grpc_json* claim) {
check_jwt_claim(claim, GRPC_JWT_OAUTH2_AUDIENCE, test_scope);
}
static void jwt_creds_check_jwt_claim(grpc_json* claim) {
check_jwt_claim(claim, test_service_url, nullptr);
}
static void test_jwt_encode_and_sign(
char* (*jwt_encode_and_sign_func)(const grpc_auth_json_key*),
void (*check_jwt_claim_func)(grpc_json*)) {
char* json_string = test_json_key_str(nullptr);
grpc_json* parsed_header = nullptr;
grpc_json* parsed_claim = nullptr;
char* scratchpad;
grpc_auth_json_key json_key =
grpc_auth_json_key_create_from_string(json_string);
const char* b64_signature;
size_t offset = 0;
char* jwt = jwt_encode_and_sign_func(&json_key);
const char* dot = strchr(jwt, '.');
GPR_ASSERT(dot != nullptr);
parsed_header =
parse_json_part_from_jwt(jwt, (size_t)(dot - jwt), &scratchpad);
GPR_ASSERT(parsed_header != nullptr);
check_jwt_header(parsed_header);
offset = (size_t)(dot - jwt) + 1;
grpc_json_destroy(parsed_header);
gpr_free(scratchpad);
dot = strchr(jwt + offset, '.');
GPR_ASSERT(dot != nullptr);
parsed_claim = parse_json_part_from_jwt(
jwt + offset, (size_t)(dot - (jwt + offset)), &scratchpad);
GPR_ASSERT(parsed_claim != nullptr);
check_jwt_claim_func(parsed_claim);
offset = (size_t)(dot - jwt) + 1;
grpc_json_destroy(parsed_claim);
gpr_free(scratchpad);
dot = strchr(jwt + offset, '.');
GPR_ASSERT(dot == nullptr); /* no more part. */
b64_signature = jwt + offset;
check_jwt_signature(b64_signature, json_key.private_key, jwt, offset - 1);
gpr_free(json_string);
grpc_auth_json_key_destruct(&json_key);
gpr_free(jwt);
}
static void test_service_account_creds_jwt_encode_and_sign(void) {
test_jwt_encode_and_sign(service_account_creds_jwt_encode_and_sign,
service_account_creds_check_jwt_claim);
}
static void test_jwt_creds_jwt_encode_and_sign(void) {
test_jwt_encode_and_sign(jwt_creds_jwt_encode_and_sign,
jwt_creds_check_jwt_claim);
}
static void test_parse_refresh_token_success(void) {
grpc_auth_refresh_token refresh_token =
grpc_auth_refresh_token_create_from_string(test_refresh_token_str);
GPR_ASSERT(grpc_auth_refresh_token_is_valid(&refresh_token));
GPR_ASSERT(refresh_token.type != nullptr &&
(strcmp(refresh_token.type, "authorized_user") == 0));
GPR_ASSERT(refresh_token.client_id != nullptr &&
(strcmp(refresh_token.client_id,
"32555999999.apps.googleusercontent.com") == 0));
GPR_ASSERT(
refresh_token.client_secret != nullptr &&
(strcmp(refresh_token.client_secret, "EmssLNjJy1332hD4KFsecret") == 0));
GPR_ASSERT(refresh_token.refresh_token != nullptr &&
(strcmp(refresh_token.refresh_token,
"1/Blahblasj424jladJDSGNf-u4Sua3HDA2ngjd42") == 0));
grpc_auth_refresh_token_destruct(&refresh_token);
}
static void test_parse_refresh_token_failure_no_type(void) {
const char refresh_token_str[] =
"{ \"client_id\": \"32555999999.apps.googleusercontent.com\","
" \"client_secret\": \"EmssLNjJy1332hD4KFsecret\","
" \"refresh_token\": \"1/Blahblasj424jladJDSGNf-u4Sua3HDA2ngjd42\"}";
grpc_auth_refresh_token refresh_token =
grpc_auth_refresh_token_create_from_string(refresh_token_str);
GPR_ASSERT(!grpc_auth_refresh_token_is_valid(&refresh_token));
}
static void test_parse_refresh_token_failure_no_client_id(void) {
const char refresh_token_str[] =
"{ \"client_secret\": \"EmssLNjJy1332hD4KFsecret\","
" \"refresh_token\": \"1/Blahblasj424jladJDSGNf-u4Sua3HDA2ngjd42\","
" \"type\": \"authorized_user\"}";
grpc_auth_refresh_token refresh_token =
grpc_auth_refresh_token_create_from_string(refresh_token_str);
GPR_ASSERT(!grpc_auth_refresh_token_is_valid(&refresh_token));
}
static void test_parse_refresh_token_failure_no_client_secret(void) {
const char refresh_token_str[] =
"{ \"client_id\": \"32555999999.apps.googleusercontent.com\","
" \"refresh_token\": \"1/Blahblasj424jladJDSGNf-u4Sua3HDA2ngjd42\","
" \"type\": \"authorized_user\"}";
grpc_auth_refresh_token refresh_token =
grpc_auth_refresh_token_create_from_string(refresh_token_str);
GPR_ASSERT(!grpc_auth_refresh_token_is_valid(&refresh_token));
}
static void test_parse_refresh_token_failure_no_refresh_token(void) {
const char refresh_token_str[] =
"{ \"client_id\": \"32555999999.apps.googleusercontent.com\","
" \"client_secret\": \"EmssLNjJy1332hD4KFsecret\","
" \"type\": \"authorized_user\"}";
grpc_auth_refresh_token refresh_token =
grpc_auth_refresh_token_create_from_string(refresh_token_str);
GPR_ASSERT(!grpc_auth_refresh_token_is_valid(&refresh_token));
}
int main(int argc, char** argv) {
grpc_test_init(argc, argv);
test_parse_json_key_success();
test_parse_json_key_failure_bad_json();
test_parse_json_key_failure_no_type();
test_parse_json_key_failure_no_client_id();
test_parse_json_key_failure_no_client_email();
test_parse_json_key_failure_no_private_key_id();
test_parse_json_key_failure_no_private_key();
test_service_account_creds_jwt_encode_and_sign();
test_jwt_creds_jwt_encode_and_sign();
test_parse_refresh_token_success();
test_parse_refresh_token_failure_no_type();
test_parse_refresh_token_failure_no_client_id();
test_parse_refresh_token_failure_no_client_secret();
test_parse_refresh_token_failure_no_refresh_token();
return 0;
}
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