92 lines
3.9 KiB
Diff
92 lines
3.9 KiB
Diff
diff -up cjose-0.6.1/src/jwe.c.orig cjose-0.6.1/src/jwe.c
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--- cjose-0.6.1/src/jwe.c.orig 2023-07-19 16:23:44.658712950 +0200
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+++ cjose-0.6.1/src/jwe.c 2023-07-19 16:55:02.173914437 +0200
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@@ -1227,6 +1227,12 @@ static bool _cjose_jwe_decrypt_dat_a256g
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goto _cjose_jwe_decrypt_dat_a256gcm_fail;
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}
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+ if (jwe->enc_auth_tag.raw_len != 16)
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+ {
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+ CJOSE_ERROR(err, CJOSE_ERR_CRYPTO);
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+ goto _cjose_jwe_decrypt_dat_a256gcm_fail;
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+ }
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+
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// set the expected GCM-mode authentication tag
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if (EVP_CIPHER_CTX_ctrl(ctx, CJOSE_EVP_CTRL_GCM_SET_TAG, jwe->enc_auth_tag.raw_len, jwe->enc_auth_tag.raw) != 1)
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{
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diff -up cjose-0.6.1/test/check_jwe.c.orig cjose-0.6.1/test/check_jwe.c
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--- cjose-0.6.1/test/check_jwe.c.orig 2018-04-12 00:39:58.000000000 +0200
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+++ cjose-0.6.1/test/check_jwe.c 2023-07-19 16:38:45.412336742 +0200
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@@ -809,6 +809,63 @@ START_TEST(test_cjose_jwe_decrypt_aes)
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}
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END_TEST
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+START_TEST(test_cjose_jwe_decrypt_aes_gcm)
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+{
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+ cjose_err err;
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+
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+ const char *key = JWK_OCT_32;
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+ const char *plain1 = "Live long and prosper.";
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+ char *compact1 = "eyJhbGciOiAiZGlyIiwgImVuYyI6ICJBMjU2R0NNIn0..Du_9fxxV-zrReaWC.aS_rpokeuxkaPc2sykcQDCQuJCYoww.GpeKGEqd8KQ0v6JNea5aSA";
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+ char *compact2 = "eyJhbGciOiAiZGlyIiwgImVuYyI6ICJBMjU2R0NNIn0..Du_9fxxV-zrReaWC.aS_rpokeuxkaPc2sykcQDCQuJCYoww.Gp";
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+
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+ cjose_jwk_t *jwk = cjose_jwk_import(key, strlen(key), &err);
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+ ck_assert_msg(NULL != jwk,
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+ "cjose_jwk_import failed: "
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+ "%s, file: %s, function: %s, line: %ld",
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+ err.message, err.file, err.function, err.line);
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+
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+ cjose_jwe_t *jwe1 = cjose_jwe_import(compact1, strlen(compact1), &err);
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+ ck_assert_msg(NULL != jwe1,
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+ "cjose_jwe_import failed: "
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+ "%s, file: %s, function: %s, line: %ld",
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+ err.message, err.file, err.function, err.line);
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+
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+ uint8_t *plain2 = NULL;
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+ size_t plain2_len = 0;
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+ plain2 = cjose_jwe_decrypt(jwe1, jwk, &plain2_len, &err);
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+ ck_assert_msg(NULL != plain2,
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+ "cjose_jwe_decrypt failed: "
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+ "%s, file: %s, function: %s, line: %ld",
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+ err.message, err.file, err.function, err.line);
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+
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+ ck_assert_msg(plain2_len == strlen(plain1),
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+ "length of decrypted plaintext does not match length of original, "
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+ "expected: %lu, found: %lu",
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+ strlen(plain1), plain2_len);
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+ ck_assert_msg(strncmp(plain1, plain2, plain2_len) == 0, "decrypted plaintext does not match encrypted plaintext");
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+
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+ cjose_get_dealloc()(plain2);
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+ cjose_jwe_release(jwe1);
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+
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+ cjose_jwe_t *jwe2 = cjose_jwe_import(compact2, strlen(compact2), &err);
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+ ck_assert_msg(NULL != jwe2,
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+ "cjose_jwe_import failed: "
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+ "%s, file: %s, function: %s, line: %ld",
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+ err.message, err.file, err.function, err.line);
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+
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+ uint8_t *plain3 = NULL;
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+ size_t plain3_len = 0;
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+ plain3 = cjose_jwe_decrypt(jwe2, jwk, &plain3_len, &err);
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+ ck_assert_msg(NULL == plain3,
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+ "cjose_jwe_decrypt succeeded where it should have failed: "
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+ "%s, file: %s, function: %s, line: %ld",
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+ err.message, err.file, err.function, err.line);
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+
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+ cjose_jwe_release(jwe2);
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+ cjose_jwk_release(jwk);
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+}
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+END_TEST
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+
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START_TEST(test_cjose_jwe_decrypt_rsa)
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{
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struct cjose_jwe_decrypt_rsa
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@@ -1210,6 +1267,7 @@ Suite *cjose_jwe_suite()
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tcase_add_test(tc_jwe, test_cjose_jwe_self_encrypt_self_decrypt_large);
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tcase_add_test(tc_jwe, test_cjose_jwe_self_encrypt_self_decrypt_many);
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tcase_add_test(tc_jwe, test_cjose_jwe_decrypt_aes);
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+ tcase_add_test(tc_jwe, test_cjose_jwe_decrypt_aes_gcm);
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tcase_add_test(tc_jwe, test_cjose_jwe_decrypt_rsa);
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tcase_add_test(tc_jwe, test_cjose_jwe_encrypt_with_bad_header);
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tcase_add_test(tc_jwe, test_cjose_jwe_encrypt_with_bad_key);
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