/* * lws-api-test-jose - RFC7515 jws tests * * Written in 2010-2020 by Andy Green * * This file is made available under the Creative Commons CC0 1.0 * Universal Public Domain Dedication. */ #include /* * JSON Web Signature is defined in RFC7515 * * https://tools.ietf.org/html/rfc7515 * * It's basically a way to wrap some JSON with a JSON "header" describing the * crypto, and a signature, all in a BASE64 wrapper with elided terminating '='. * * The signature stays with the content, it serves a different purpose than eg * a TLS tunnel to transfer it. * */ /* for none, the compact serialization format is b64u(jose hdr).b64u(payload) */ static const char *none_cser = "eyJhbGciOiJub25lIn0" "." "eyJpc3MiOiJqb2UiLA0KICJleHAiOjEzMDA4MTkzODAsDQogImh0dHA6Ly9leGFt" "cGxlLmNvbS9pc19yb290Ijp0cnVlfQ", *none_jose = "{\"alg\":\"none\"}", *none_payload = "{\"iss\":\"joe\",\r\n \"exp\":1300819380,\r\n" " \"http://example.com/is_root\":true}"; int test_jws_none(struct lws_context *context) { struct lws_jws_map map; struct lws_jose jose; char temp[2048]; int n, temp_len = sizeof(temp), ret = -1; lws_jose_init(&jose); /* A.5 Unsecured JSON "none" RFC7515 worked example */ /* decode the b64.b64[.b64] compact serialization blocks */ n = lws_jws_compact_decode(none_cser, (int)strlen(none_cser), &map, NULL, temp, &temp_len); if (n != 2) { lwsl_err("%s: concat_map failed\n", __func__); goto bail; } /* confirm the decoded JOSE header is exactly what we expect */ if (strncmp(none_jose, map.buf[LJWS_JOSE], map.len[LJWS_JOSE])) { lwsl_err("%s: jose b64 decode wrong\n", __func__); goto bail; } /* parse the JOSE header */ if (lws_jws_parse_jose(&jose, map.buf[LJWS_JOSE], (int)map.len[LJWS_JOSE], (char *)lws_concat_temp(temp, temp_len), &temp_len) < 0 || !jose.alg) { lwsl_err("%s: JOSE parse failed\n", __func__); goto bail; } /* confirm we used the "none" alg as expected from JOSE hdr */ if (strcmp(jose.alg->alg, "none")) { lwsl_err("%s: JOSE header has wrong alg\n", __func__); goto bail; } /* confirm the payload is literally what we expect */ if (strncmp(none_payload, map.buf[LJWS_PYLD], map.len[LJWS_PYLD])) { lwsl_err("%s: payload b64 decode wrong\n", __func__); goto bail; } /* end */ ret = 0; bail: lws_jose_destroy(&jose); if (ret) lwsl_err("%s: selftest failed ++++++++++++++++++++\n", __func__); else lwsl_notice("%s: selftest OK\n", __func__); return ret; } static const char *test1 = "{\"typ\":\"JWT\",\r\n \"alg\":\"HS256\"}", *test1_enc = "eyJ0eXAiOiJKV1QiLA0KICJhbGciOiJIUzI1NiJ9", *test2 = "{\"iss\":\"joe\",\r\n \"exp\":1300819380,\r\n" " \"http://example.com/is_root\":true}", *test2_enc = "eyJpc3MiOiJqb2UiLA0KICJleHAiOjEzMDA4MTkzODAsDQ" "ogImh0dHA6Ly9leGFtcGxlLmNvbS9pc19yb290Ijp0cnVlfQ", *key_jwk = "{\"kty\":\"oct\",\r\n" " \"k\":\"AyM1SysPpbyDfgZld3umj1qzKObwVMkoqQ-EstJQ" "Lr_T-1qS0gZH75aKtMN3Yj0iPS4hcgUuTwjAzZr1Z9CAow\"}", *hash_enc = "dBjftJeZ4CVP-mB92K27uhbUJU1p1r_wW1gFWFOEjXk" ; int test_jws_HS256(struct lws_context *context) { char buf[2048], temp[256], *p = buf, *end = buf + sizeof(buf) - 1, *enc_ptr; uint8_t digest[LWS_GENHASH_LARGEST]; struct lws_jws_map map; int temp_len = sizeof(temp); struct lws_genhmac_ctx ctx; struct lws_jose jose; struct lws_jwk jwk; struct lws_jws jws; int n; lws_jose_init(&jose); lws_jws_init(&jws, &jwk, context); /* Test 1: SHA256 on RFC7515 worked example */ /* parse the JOSE header */ if (lws_jws_parse_jose(&jose, test1, (int)strlen(test1), temp, &temp_len) < 0 || !jose.alg) { lwsl_err("%s: JOSE parse failed\n", __func__); goto bail; } /* confirm we used the "none" alg as expected from JOSE hdr */ if (strcmp(jose.alg->alg, "HS256")) { lwsl_err("%s: JOSE header has wrong alg\n", __func__); goto bail; } /* 1.1: import the JWK oct key */ if (lws_jwk_import(&jwk, NULL, NULL, key_jwk, strlen(key_jwk)) < 0) { lwsl_notice("Failed to decode JWK test key\n"); return -1; } if (jwk.kty != LWS_GENCRYPTO_KTY_OCT) { lwsl_err("%s: unexpected kty %d\n", __func__, jwk.kty); return -1; } /* 1.2: create JWS known hdr + known payload */ n = lws_jws_encode_section(test1, strlen(test1), 1, &p, end); if (n < 0) { goto bail; } if (strcmp(buf, test1_enc)) goto bail; enc_ptr = p + 1; /* + 1 skips the . */ n = lws_jws_encode_section(test2, strlen(test2), 0, &p, end); if (n < 0) { goto bail; } if (strcmp(enc_ptr, test2_enc)) goto bail; /* 1.3: use HMAC SHA-256 with known key on the hdr . payload */ if (lws_genhmac_init(&ctx, jose.alg->hmac_type, jwk.e[LWS_GENCRYPTO_OCT_KEYEL_K].buf, jwk.e[LWS_GENCRYPTO_OCT_KEYEL_K].len)) goto bail; if (lws_genhmac_update(&ctx, (uint8_t *)buf, lws_ptr_diff_size_t(p, buf))) goto bail_destroy_hmac; lws_genhmac_destroy(&ctx, digest); /* 1.4: append a base64 encode of the computed HMAC digest */ enc_ptr = p + 1; /* + 1 skips the . */ n = lws_jws_encode_section((const char *)digest, 32, 0, &p, end); if (n < 0) goto bail; if (strcmp(enc_ptr, hash_enc)) { /* check against known B64URL hash */ lwsl_err("%s: b64 enc of computed HMAC mismatches '%s' '%s'\n", __func__, enc_ptr, hash_enc); goto bail; } /* 1.5: Check we can agree the signature matches the payload */ if (lws_jws_sig_confirm_compact_b64(buf, lws_ptr_diff_size_t(p, buf), &map, &jwk, context, lws_concat_temp(temp, temp_len), &temp_len) < 0) { lwsl_notice("%s: confirm sig failed\n", __func__); goto bail; } lws_jws_destroy(&jws); lws_jwk_destroy(&jwk); lws_jose_destroy(&jose); /* end */ lwsl_notice("%s: selftest OK\n", __func__); return 0; bail_destroy_hmac: lws_genhmac_destroy(&ctx, NULL); bail: lws_jws_destroy(&jws); lws_jwk_destroy(&jwk); lws_jose_destroy(&jose); lwsl_err("%s: selftest failed ++++++++++++++++++++\n", __func__); return 1; } static const char /* the key from worked example in RFC7515 A-2, as a JWK */ *rfc7515_rsa_key = "{\"kty\":\"RSA\"," " \"n\":\"ofgWCuLjybRlzo0tZWJjNiuSfb4p4fAkd_wWJcyQoTbji9k0l8W26mPddx" "HmfHQp-Vaw-4qPCJrcS2mJPMEzP1Pt0Bm4d4QlL-yRT-SFd2lZS-pCgNMs" "D1W_YpRPEwOWvG6b32690r2jZ47soMZo9wGzjb_7OMg0LOL-bSf63kpaSH" "SXndS5z5rexMdbBYUsLA9e-KXBdQOS-UTo7WTBEMa2R2CapHg665xsmtdV" "MTBQY4uDZlxvb3qCo5ZwKh9kG4LT6_I5IhlJH7aGhyxXFvUK-DWNmoudF8" "NAco9_h9iaGNj8q2ethFkMLs91kzk2PAcDTW9gb54h4FRWyuXpoQ\"," "\"e\":\"AQAB\"," "\"d\":\"Eq5xpGnNCivDflJsRQBXHx1hdR1k6Ulwe2JZD50LpXyWPEAeP88vLNO97I" "jlA7_GQ5sLKMgvfTeXZx9SE-7YwVol2NXOoAJe46sui395IW_GO-pWJ1O0" "BkTGoVEn2bKVRUCgu-GjBVaYLU6f3l9kJfFNS3E0QbVdxzubSu3Mkqzjkn" "439X0M_V51gfpRLI9JYanrC4D4qAdGcopV_0ZHHzQlBjudU2QvXt4ehNYT" "CBr6XCLQUShb1juUO1ZdiYoFaFQT5Tw8bGUl_x_jTj3ccPDVZFD9pIuhLh" "BOneufuBiB4cS98l2SR_RQyGWSeWjnczT0QU91p1DhOVRuOopznQ\"," "\"p\":\"4BzEEOtIpmVdVEZNCqS7baC4crd0pqnRH_5IB3jw3bcxGn6QLvnEtfdUdi" "YrqBdss1l58BQ3KhooKeQTa9AB0Hw_Py5PJdTJNPY8cQn7ouZ2KKDcmnPG" "BY5t7yLc1QlQ5xHdwW1VhvKn-nXqhJTBgIPgtldC-KDV5z-y2XDwGUc\"," "\"q\":\"uQPEfgmVtjL0Uyyx88GZFF1fOunH3-7cepKmtH4pxhtCoHqpWmT8YAmZxa" "ewHgHAjLYsp1ZSe7zFYHj7C6ul7TjeLQeZD_YwD66t62wDmpe_HlB-TnBA" "-njbglfIsRLtXlnDzQkv5dTltRJ11BKBBypeeF6689rjcJIDEz9RWdc\"," "\"dp\":\"BwKfV3Akq5_MFZDFZCnW-wzl-CCo83WoZvnLQwCTeDv8uzluRSnm71I3Q" "CLdhrqE2e9YkxvuxdBfpT_PI7Yz-FOKnu1R6HsJeDCjn12Sk3vmAktV2zb" "34MCdy7cpdTh_YVr7tss2u6vneTwrA86rZtu5Mbr1C1XsmvkxHQAdYo0\"," "\"dq\":\"h_96-mK1R_7glhsum81dZxjTnYynPbZpHziZjeeHcXYsXaaMwkOlODsWa" "7I9xXDoRwbKgB719rrmI2oKr6N3Do9U0ajaHF-NKJnwgjMd2w9cjz3_-ky" "NlxAr2v4IKhGNpmM5iIgOS1VZnOZ68m6_pbLBSp3nssTdlqvd0tIiTHU\"," "\"qi\":\"IYd7DHOhrWvxkwPQsRM2tOgrjbcrfvtQJipd-DlcxyVuuM9sQLdgjVk2o" "y26F0EmpScGLq2MowX7fhd_QJQ3ydy5cY7YIBi87w93IKLEdfnbJtoOPLU" "W0ITrJReOgo1cq9SbsxYawBgfp_gh6A5603k2-ZQwVK0JKSHuLFkuQ3U\"" "}", *rfc7515_rsa_a1 = /* the signed worked example in RFC7515 A-1 */ "eyJhbGciOiJSUzI1NiJ9" ".eyJpc3MiOiJqb2UiLA0KICJleHAiOjEzMDA4MTkzODAsDQogImh0dHA6Ly9leGFt" "cGxlLmNvbS9pc19yb290Ijp0cnVlfQ" ".cC4hiUPoj9Eetdgtv3hF80EGrhuB__dzERat0XF9g2VtQgr9PJbu3XOiZj5RZmh7" "AAuHIm4Bh-0Qc_lF5YKt_O8W2Fp5jujGbds9uJdbF9CUAr7t1dnZcAcQjbKBYNX4" "BAynRFdiuB--f_nZLgrnbyTyWzO75vRK5h6xBArLIARNPvkSjtQBMHlb1L07Qe7K" "0GarZRmB_eSN9383LcOLn6_dO--xi12jzDwusC-eOkHWEsqtFZESc6BfI7noOPqv" "hJ1phCnvWh6IeYI2w9QOYEUipUTI8np6LbgGY9Fs98rqVt5AXLIhWkWywlVmtVrB" "p0igcN_IoypGlUPQGe77Rw" ; int test_jws_RS256(struct lws_context *context) { struct lws_jws_map map; struct lws_jose jose; struct lws_jwk jwk; struct lws_jws jws; char temp[2048], *in; int n, l, temp_len = sizeof(temp); lws_jose_init(&jose); lws_jws_init(&jws, &jwk, context); /* Test 2: RS256 on RFC7515 worked example */ if (lws_gencrypto_jws_alg_to_definition("RS256", &jose.alg)) { lwsl_err("%s: RS256 not supported\n", __func__); goto bail; } /* 2.1: import the jwk */ if (lws_jwk_import(&jwk, NULL, NULL, rfc7515_rsa_key, strlen(rfc7515_rsa_key))) { lwsl_notice("%s: 2.2: Failed to read JWK key\n", __func__); goto bail2; } if (jwk.kty != LWS_GENCRYPTO_KTY_RSA) { lwsl_err("%s: 2.2: kty: %d instead of RSA\n", __func__, jwk.kty); goto bail; } /* 2.2: check the signature on the test packet from RFC7515 A-1 */ if (lws_jws_sig_confirm_compact_b64(rfc7515_rsa_a1, strlen(rfc7515_rsa_a1), &map, &jwk, context, temp, &temp_len) < 0) { lwsl_notice("%s: 2.2: confirm rsa sig failed\n", __func__); goto bail; } if (lws_jws_b64_compact_map(rfc7515_rsa_a1, (int)strlen(rfc7515_rsa_a1), &jws.map_b64) != 3) { lwsl_notice("%s: lws_jws_b64_compact_map failed\n", __func__); goto bail; } /* 2.3: generate our own signature for a copy of the test packet */ in = lws_concat_temp(temp, temp_len); l = (int)strlen(rfc7515_rsa_a1); if (temp_len < l + 1) goto bail; memcpy(in, rfc7515_rsa_a1, (unsigned int)l + 1); temp_len -= l + 1; if (lws_jws_b64_compact_map(in, l, &jws.map_b64) != 3) { lwsl_notice("%s: lws_jws_b64_compact_map failed\n", __func__); goto bail; } /* overwrite the copy of the known b64 sig (it's all placed inside temp) */ n = lws_jws_sign_from_b64(&jose, &jws, (char *)jws.map_b64.buf[LJWS_SIG], jws.map_b64.len[LJWS_SIG] + 8); if (n < 0) { lwsl_err("%s: failed signing test packet\n", __func__); goto bail; } jws.map_b64.len[LJWS_SIG] = (unsigned int)n; /* 2.4: confirm our signature can be verified */ in[l] = '\0'; if (lws_jws_sig_confirm_compact_b64(in, (unsigned int)l, &map, &jwk, context, lws_concat_temp(temp, temp_len), &temp_len) < 0) { lwsl_notice("%s: 2.2: confirm rsa sig failed\n", __func__); goto bail; } lws_jwk_destroy(&jwk); /* end */ lwsl_notice("%s: selftest OK\n", __func__); return 0; bail: lws_jwk_destroy(&jwk); bail2: lws_jws_destroy(&jws); lwsl_err("%s: selftest failed ++++++++++++++++++++\n", __func__); return 1; } static const char *es256_jose = "{\"alg\":\"ES256\"}", *es256_payload = "{\"iss\":\"joe\",\r\n \"exp\":1300819380,\r\n" " \"http://example.com/is_root\":true}", *es256_cser = "eyJhbGciOiJFUzI1NiJ9" "." "eyJpc3MiOiJqb2UiLA0KICJleHAiOjEzMDA4MTkzODAsDQogImh0dHA6Ly9leGFt" "cGxlLmNvbS9pc19yb290Ijp0cnVlfQ" "." "DtEhU3ljbEg8L38VWAfUAqOyKAM6-Xx-F4GawxaepmXFCgfTjDxw5djxLa8ISlSA" "pmWQxfKTUJqPP3-Kg6NU1Q", *es256_jwk = "{" "\"kty\":\"EC\"," "\"crv\":\"P-256\"," "\"x\":\"f83OJ3D2xF1Bg8vub9tLe1gHMzV76e8Tus9uPHvRVEU\"," "\"y\":\"x_FEzRu9m36HLN_tue659LNpXW6pCyStikYjKIWI5a0\"," "\"d\":\"jpsQnnGQmL-YBIffH1136cspYG6-0iY7X1fCE9-E9LI\"" "}" #if 0 , rfc7515_ec_a3_R[] = { 14, 209, 33, 83, 121, 99, 108, 72, 60, 47, 127, 21, 88, 7, 212, 2, 163, 178, 40, 3, 58, 249, 124, 126, 23, 129, 154, 195, 22, 158, 166, 101 }, rfc7515_ec_a3_S[] = { 197, 10, 7, 211, 140, 60, 112, 229, 216, 241, 45, 175, 8, 74, 84, 128, 166, 101, 144, 197, 242, 147, 80, 154, 143, 63, 127, 138, 131, 163, 84, 213 } #endif ; int test_jws_ES256(struct lws_context *context) { uint8_t digest[LWS_GENHASH_LARGEST]; struct lws_genhash_ctx hash_ctx; struct lws_jws_map map; struct lws_jose jose; struct lws_jwk jwk; struct lws_jws jws; char temp[2048], *p; int ret = -1, l, n, temp_len = sizeof(temp); /* A.3 "ES256" RFC7515 worked example - verify */ lws_jose_init(&jose); /* decode the b64.b64[.b64] compact serialization blocks */ if (lws_jws_compact_decode(es256_cser, (int)strlen(es256_cser), &jws.map, &jws.map_b64, temp, &temp_len) != 3) { lwsl_err("%s: concat_map failed\n", __func__); goto bail; } /* confirm the decoded JOSE header is exactly what we expect */ if (jws.map.len[LJWS_JOSE] != strlen(es256_jose) || strncmp(es256_jose, jws.map.buf[LJWS_JOSE], jws.map.len[LJWS_JOSE])) { lwsl_err("%s: jose b64 decode wrong\n", __func__); goto bail; } /* confirm the decoded payload is exactly what we expect */ if (jws.map.len[LJWS_PYLD] != strlen(es256_payload) || strncmp(es256_payload, jws.map.buf[LJWS_PYLD], jws.map.len[LJWS_PYLD])) { lwsl_err("%s: payload b64 decode wrong\n", __func__); goto bail; } /* parse the JOSE header */ if (lws_jws_parse_jose(&jose, jws.map.buf[LJWS_JOSE], (int)jws.map.len[LJWS_JOSE], (char *)lws_concat_temp(temp, temp_len), &temp_len) < 0) { lwsl_err("%s: JOSE parse failed\n", __func__); goto bail; } /* confirm we used "ES256" alg we expect from the JOSE hdr */ if (strcmp(jose.alg->alg, "ES256")) { lwsl_err("%s: JOSE header has wrong alg\n", __func__); goto bail; } jws.jwk = &jwk; jws.context = context; /* import the ES256 jwk */ if (lws_jwk_import(&jwk, NULL, NULL, es256_jwk, strlen(es256_jwk))) { lwsl_notice("%s: Failed to read JWK key\n", __func__); goto bail; } /* sanity */ if (jwk.kty != LWS_GENCRYPTO_KTY_EC) { lwsl_err("%s: kty: %d instead of EC\n", __func__, jwk.kty); goto bail1; } if (lws_jws_sig_confirm(&jws.map_b64, &jws.map, &jwk, context) < 0) { lwsl_notice("%s: confirm EC sig failed\n", __func__); goto bail1; } /* A.3 "ES256" RFC7515 worked example - sign */ l = (int)strlen(es256_cser); if (temp_len < l + 1) goto bail1; p = lws_concat_temp(temp, temp_len); memcpy(p, es256_cser, (unsigned int)l + 1); temp_len -= l + 1; /* scan the b64 compact serialization string to map the blocks */ if (lws_jws_b64_compact_map(p, l, &jws.map_b64) != 3) goto bail1; /* create the hash of the protected b64 part */ if (lws_genhash_init(&hash_ctx, jose.alg->hash_type) || lws_genhash_update(&hash_ctx, jws.map_b64.buf[LJWS_JOSE], jws.map_b64.len[LJWS_JOSE]) || lws_genhash_update(&hash_ctx, ".", 1) || lws_genhash_update(&hash_ctx, jws.map_b64.buf[LJWS_PYLD], jws.map_b64.len[LJWS_PYLD]) || lws_genhash_destroy(&hash_ctx, digest)) { lws_genhash_destroy(&hash_ctx, NULL); goto bail1; } lwsl_hexdump(jws.map_b64.buf[LJWS_SIG], jws.map_b64.len[LJWS_SIG]); /* overwrite the copy of the known b64 sig (it's placed inside buf) */ n = lws_jws_sign_from_b64(&jose, &jws, (char *)jws.map_b64.buf[LJWS_SIG], jws.map_b64.len[LJWS_SIG] + 8); if (n < 0) { lwsl_err("%s: failed signing test packet\n", __func__); goto bail1; } jws.map_b64.len[LJWS_SIG] = (unsigned int)n; lwsl_hexdump(jws.map_b64.buf[LJWS_SIG], jws.map_b64.len[LJWS_SIG]); /* 2.4: confirm our generated signature can be verified */ // lwsl_err("p %p, l %d\n", p, (int)l); p[l] = '\0'; if (lws_jws_sig_confirm_compact_b64(p, (unsigned int)l, &map, &jwk, context, lws_concat_temp(temp, temp_len), &temp_len) < 0) { lwsl_notice("%s: confirm our EC sig failed\n", __func__); goto bail1; } /* end */ ret = 0; bail1: lws_jwk_destroy(&jwk); lws_jose_destroy(&jose); bail: lwsl_notice("%s: selftest %s\n", __func__, ret ? "FAIL" : "OK"); return ret; } static const char *es512_jose = "{\"alg\":\"ES512\"}", *es512_payload = "Payload", *es512_cser = "eyJhbGciOiJFUzUxMiJ9" "." "UGF5bG9hZA" "." "AdwMgeerwtHoh-l192l60hp9wAHZFVJbLfD_UxMi70cwnZOYaRI1bKPWROc-mZZq" "wqT2SI-KGDKB34XO0aw_7XdtAG8GaSwFKdCAPZgoXD2YBJZCPEX3xKpRwcdOO8Kp" "EHwJjyqOgzDO7iKvU8vcnwNrmxYbSW9ERBXukOXolLzeO_Jn", *es512_jwk = "{" "\"kty\":\"EC\"," "\"crv\":\"P-521\"," "\"x\":\"AekpBQ8ST8a8VcfVOTNl353vSrDCLLJXmPk06wTjxrrjcBpXp5EOnYG_" "NjFZ6OvLFV1jSfS9tsz4qUxcWceqwQGk\"," "\"y\":\"ADSmRA43Z1DSNx_RvcLI87cdL07l6jQyyBXMoxVg_l2Th-x3S1WDhjDl" "y79ajL4Kkd0AZMaZmh9ubmf63e3kyMj2\"," "\"d\":\"AY5pb7A0UFiB3RELSD64fTLOSV_jazdF7fLYyuTw8lOfRhWg6Y6rUrPA" "xerEzgdRhajnu0ferB0d53vM9mE15j2C\"" "}" ; int test_jws_ES512(struct lws_context *context) { uint8_t digest[LWS_GENHASH_LARGEST]; struct lws_genhash_ctx hash_ctx; struct lws_jws_map map; struct lws_jose jose; struct lws_jwk jwk; struct lws_jws jws; char temp[2048], *p; int ret = -1, l, n, temp_len = sizeof(temp); /* A.4 "ES512" RFC7515 worked example - verify */ lws_jose_init(&jose); /* decode the b64.b64[.b64] compact serialization blocks */ if (lws_jws_compact_decode(es512_cser, (int)strlen(es512_cser), &jws.map, &jws.map_b64, temp, &temp_len) != 3) { lwsl_err("%s: concat_map failed\n", __func__); goto bail; } /* confirm the decoded JOSE header is exactly what we expect */ if (jws.map.len[LJWS_JOSE] != strlen(es512_jose) || strncmp(es512_jose, jws.map.buf[LJWS_JOSE], jws.map.len[LJWS_JOSE])) { lwsl_err("%s: jose b64 decode wrong\n", __func__); goto bail; } /* confirm the decoded payload is exactly what we expect */ if (jws.map.len[LJWS_PYLD] != strlen(es512_payload) || strncmp(es512_payload, jws.map.buf[LJWS_PYLD], jws.map.len[LJWS_PYLD])) { lwsl_err("%s: payload b64 decode wrong\n", __func__); goto bail; } /* parse the JOSE header */ if (lws_jws_parse_jose(&jose, jws.map.buf[LJWS_JOSE], (int)jws.map.len[LJWS_JOSE], lws_concat_temp(temp, temp_len), &temp_len) < 0) { lwsl_err("%s: JOSE parse failed\n", __func__); goto bail; } /* confirm we used "es512" alg we expect from the JOSE hdr */ if (strcmp(jose.alg->alg, "ES512")) { lwsl_err("%s: JOSE header has wrong alg\n", __func__); goto bail; } jws.jwk = &jwk; jws.context = context; /* import the es512 jwk */ if (lws_jwk_import(&jwk, NULL, NULL, es512_jwk, strlen(es512_jwk))) { lwsl_notice("%s: Failed to read JWK key\n", __func__); goto bail; } /* sanity */ if (jwk.kty != LWS_GENCRYPTO_KTY_EC) { lwsl_err("%s: kty: %d instead of EC\n", __func__, jwk.kty); goto bail1; } if (lws_jws_sig_confirm(&jws.map_b64, &jws.map, &jwk, context) < 0) { lwsl_notice("%s: confirm EC sig failed\n", __func__); goto bail1; } /* A.3 "es512" RFC7515 worked example - sign */ l = (int)strlen(es512_cser); if (temp_len < l) goto bail1; p = lws_concat_temp(temp, temp_len); memcpy(p, es512_cser, (unsigned int)l + 1); temp_len -= (l + 1); /* scan the b64 compact serialization string to map the blocks */ if (lws_jws_b64_compact_map(p, l, &jws.map_b64) != 3) goto bail1; /* create the hash of the protected b64 part */ if (lws_genhash_init(&hash_ctx, jose.alg->hash_type) || lws_genhash_update(&hash_ctx, jws.map_b64.buf[LJWS_JOSE], jws.map_b64.len[LJWS_JOSE]) || lws_genhash_update(&hash_ctx, ".", 1) || lws_genhash_update(&hash_ctx, jws.map_b64.buf[LJWS_PYLD], jws.map_b64.len[LJWS_PYLD]) || lws_genhash_destroy(&hash_ctx, digest)) { lws_genhash_destroy(&hash_ctx, NULL); goto bail1; } /* overwrite the copy of the known b64 sig (it's placed inside buf) */ n = lws_jws_sign_from_b64(&jose, &jws, (char *)jws.map_b64.buf[LJWS_SIG], 1024); if (n < 0) { lwsl_err("%s: failed signing test packet\n", __func__); goto bail1; } jws.map_b64.len[LJWS_SIG] = (unsigned int)n; /* 2.4: confirm our generated signature can be verified */ p[l] = '\0'; if (lws_jws_sig_confirm_compact_b64(p, (unsigned int)l, &map, &jwk, context, lws_concat_temp(temp, temp_len), &temp_len) < 0) { lwsl_notice("%s: confirm our ECDSA sig failed\n", __func__); goto bail1; } /* jwt test */ { unsigned long long ull = lws_now_secs(); char buf[8192]; size_t cml = 2048, cml2 = 2048; if (lws_jwt_sign_compact(context, &jwk, "ES512", (char *)buf, &cml2, (char *)buf + 2048, 4096, "{\"iss\":\"warmcat.com\",\"aud\":" "\"https://libwebsockets.org/sai\"," "\"iat\":%llu," "\"nbf\":%llu," "\"exp\":%llu," "\"sub\":\"manage\"}", ull, ull - 60, ull + (30 * 24 * 3600) )) { lwsl_err("%s: failed to create JWT\n", __func__); goto bail1; } lwsl_notice("%s: jwt test '%s'\n", __func__, buf); if (lws_jwt_signed_validate(context, &jwk, "ES512", (const char *)buf, cml2, (char *)buf + 2048, 2048, (char *)buf + 4096, &cml)) { lwsl_err("%s: failed to parse JWT\n", __func__); goto bail1; } lwsl_notice("%s: jwt valid, payload '%s'\n", __func__, buf + 4096); } /* end */ ret = 0; bail1: lws_jwk_destroy(&jwk); lws_jose_destroy(&jose); bail: lwsl_notice("%s: selftest %s\n", __func__, ret ? "FAIL" : "OK"); return ret; } static char rsa_cert[] = "-----BEGIN CERTIFICATE-----\n" "MIIF5jCCA86gAwIBAgIJANq50IuwPFKgMA0GCSqGSIb3DQEBCwUAMIGGMQswCQYD\n" "VQQGEwJHQjEQMA4GA1UECAwHRXJld2hvbjETMBEGA1UEBwwKQWxsIGFyb3VuZDEb\n" "MBkGA1UECgwSbGlid2Vic29ja2V0cy10ZXN0MRIwEAYDVQQDDAlsb2NhbGhvc3Qx\n" "HzAdBgkqhkiG9w0BCQEWEG5vbmVAaW52YWxpZC5vcmcwIBcNMTgwMzIwMDQxNjA3\n" "WhgPMjExODAyMjQwNDE2MDdaMIGGMQswCQYDVQQGEwJHQjEQMA4GA1UECAwHRXJl\n" "d2hvbjETMBEGA1UEBwwKQWxsIGFyb3VuZDEbMBkGA1UECgwSbGlid2Vic29ja2V0\n" "cy10ZXN0MRIwEAYDVQQDDAlsb2NhbGhvc3QxHzAdBgkqhkiG9w0BCQEWEG5vbmVA\n" "aW52YWxpZC5vcmcwggIiMA0GCSqGSIb3DQEBAQUAA4ICDwAwggIKAoICAQCjYtuW\n" "aICCY0tJPubxpIgIL+WWmz/fmK8IQr11Wtee6/IUyUlo5I602mq1qcLhT/kmpoR8\n" "Di3DAmHKnSWdPWtn1BtXLErLlUiHgZDrZWInmEBjKM1DZf+CvNGZ+EzPgBv5nTek\n" "LWcfI5ZZtoGuIP1Dl/IkNDw8zFz4cpiMe/BFGemyxdHhLrKHSm8Eo+nT734tItnH\n" "KT/m6DSU0xlZ13d6ehLRm7/+Nx47M3XMTRH5qKP/7TTE2s0U6+M0tsGI2zpRi+m6\n" "jzhNyMBTJ1u58qAe3ZW5/+YAiuZYAB6n5bhUp4oFuB5wYbcBywVR8ujInpF8buWQ\n" "Ujy5N8pSNp7szdYsnLJpvAd0sibrNPjC0FQCNrpNjgJmIK3+mKk4kXX7ZTwefoAz\n" "TK4l2pHNuC53QVc/EF++GBLAxmvCDq9ZpMIYi7OmzkkAKKC9Ue6Ef217LFQCFIBK\n" "Izv9cgi9fwPMLhrKleoVRNsecBsCP569WgJXhUnwf2lon4fEZr3+vRuc9shfqnV0\n" "nPN1IMSnzXCast7I2fiuRXdIz96KjlGQpP4XfNVA+RGL7aMnWOFIaVrKWLzAtgzo\n" "GMTvP/AuehKXncBJhYtW0ltTioVx+5yTYSAZWl+IssmXjefxJqYi2/7QWmv1QC9p\n" "sNcjTMaBQLN03T1Qelbs7Y27sxdEnNUth4kI+wIDAQABo1MwUTAdBgNVHQ4EFgQU\n" "9mYU23tW2zsomkKTAXarjr2vjuswHwYDVR0jBBgwFoAU9mYU23tW2zsomkKTAXar\n" "jr2vjuswDwYDVR0TAQH/BAUwAwEB/zANBgkqhkiG9w0BAQsFAAOCAgEANjIBMrow\n" "YNCbhAJdP7dhlhT2RUFRdeRUJD0IxrH/hkvb6myHHnK8nOYezFPjUlmRKUgNEDuA\n" "xbnXZzPdCRNV9V2mShbXvCyiDY7WCQE2Bn44z26O0uWVk+7DNNLH9BnkwUtOnM9P\n" "wtmD9phWexm4q2GnTsiL6Ul6cy0QlTJWKVLEUQQ6yda582e23J1AXqtqFcpfoE34\n" "H3afEiGy882b+ZBiwkeV+oq6XVF8sFyr9zYrv9CvWTYlkpTQfLTZSsgPdEHYVcjv\n" "xQ2D+XyDR0aRLRlvxUa9dHGFHLICG34Juq5Ai6lM1EsoD8HSsJpMcmrH7MWw2cKk\n" "ujC3rMdFTtte83wF1uuF4FjUC72+SmcQN7A386BC/nk2TTsJawTDzqwOu/VdZv2g\n" "1WpTHlumlClZeP+G/jkSyDwqNnTu1aodDmUa4xZodfhP1HWPwUKFcq8oQr148QYA\n" "AOlbUOJQU7QwRWd1VbnwhDtQWXC92A2w1n/xkZSR1BM/NUSDhkBSUU1WjMbWg6Gg\n" "mnIZLRerQCu1Oozr87rOQqQakPkyt8BUSNK3K42j2qcfhAONdRl8Hq8Qs5pupy+s\n" "8sdCGDlwR3JNCMv6u48OK87F4mcIxhkSefFJUFII25pCGN5WtE4p5l+9cnO1GrIX\n" "e2Hl/7M0c/lbZ4FvXgARlex2rkgS0Ka06HE=\n" "-----END CERTIFICATE-----\n", rsa_key[] = "-----BEGIN PRIVATE KEY-----\n" "MIIJQwIBADANBgkqhkiG9w0BAQEFAASCCS0wggkpAgEAAoICAQCjYtuWaICCY0tJ\n" "PubxpIgIL+WWmz/fmK8IQr11Wtee6/IUyUlo5I602mq1qcLhT/kmpoR8Di3DAmHK\n" "nSWdPWtn1BtXLErLlUiHgZDrZWInmEBjKM1DZf+CvNGZ+EzPgBv5nTekLWcfI5ZZ\n" "toGuIP1Dl/IkNDw8zFz4cpiMe/BFGemyxdHhLrKHSm8Eo+nT734tItnHKT/m6DSU\n" "0xlZ13d6ehLRm7/+Nx47M3XMTRH5qKP/7TTE2s0U6+M0tsGI2zpRi+m6jzhNyMBT\n" "J1u58qAe3ZW5/+YAiuZYAB6n5bhUp4oFuB5wYbcBywVR8ujInpF8buWQUjy5N8pS\n" "Np7szdYsnLJpvAd0sibrNPjC0FQCNrpNjgJmIK3+mKk4kXX7ZTwefoAzTK4l2pHN\n" "uC53QVc/EF++GBLAxmvCDq9ZpMIYi7OmzkkAKKC9Ue6Ef217LFQCFIBKIzv9cgi9\n" "fwPMLhrKleoVRNsecBsCP569WgJXhUnwf2lon4fEZr3+vRuc9shfqnV0nPN1IMSn\n" "zXCast7I2fiuRXdIz96KjlGQpP4XfNVA+RGL7aMnWOFIaVrKWLzAtgzoGMTvP/Au\n" "ehKXncBJhYtW0ltTioVx+5yTYSAZWl+IssmXjefxJqYi2/7QWmv1QC9psNcjTMaB\n" "QLN03T1Qelbs7Y27sxdEnNUth4kI+wIDAQABAoICAFWe8MQZb37k2gdAV3Y6aq8f\n" "qokKQqbCNLd3giGFwYkezHXoJfg6Di7oZxNcKyw35LFEghkgtQqErQqo35VPIoH+\n" "vXUpWOjnCmM4muFA9/cX6mYMc8TmJsg0ewLdBCOZVw+wPABlaqz+0UOiSMMftpk9\n" "fz9JwGd8ERyBsT+tk3Qi6D0vPZVsC1KqxxL/cwIFd3Hf2ZBtJXe0KBn1pktWht5A\n" "Kqx9mld2Ovl7NjgiC1Fx9r+fZw/iOabFFwQA4dr+R8mEMK/7bd4VXfQ1o/QGGbMT\n" "G+ulFrsiDyP+rBIAaGC0i7gDjLAIBQeDhP409ZhswIEc/GBtODU372a2CQK/u4Q/\n" "HBQvuBtKFNkGUooLgCCbFxzgNUGc83GB/6IwbEM7R5uXqsFiE71LpmroDyjKTlQ8\n" "YZkpIcLNVLw0usoGYHFm2rvCyEVlfsE3Ub8cFyTFk50SeOcF2QL2xzKmmbZEpXgl\n" "xBHR0hjgon0IKJDGfor4bHO7Nt+1Ece8u2oTEKvpz5aIn44OeC5mApRGy83/0bvs\n" "esnWjDE/bGpoT8qFuy+0urDEPNId44XcJm1IRIlG56ErxC3l0s11wrIpTmXXckqw\n" "zFR9s2z7f0zjeyxqZg4NTPI7wkM3M8BXlvp2GTBIeoxrWB4V3YArwu8QF80QBgVz\n" "mgHl24nTg00UH1OjZsABAoIBAQDOxftSDbSqGytcWqPYP3SZHAWDA0O4ACEM+eCw\n" "au9ASutl0IDlNDMJ8nC2ph25BMe5hHDWp2cGQJog7pZ/3qQogQho2gUniKDifN77\n" "40QdykllTzTVROqmP8+efreIvqlzHmuqaGfGs5oTkZaWj5su+B+bT+9rIwZcwfs5\n" "YRINhQRx17qa++xh5mfE25c+M9fiIBTiNSo4lTxWMBShnK8xrGaMEmN7W0qTMbFH\n" "PgQz5FcxRjCCqwHilwNBeLDTp/ZECEB7y34khVh531mBE2mNzSVIQcGZP1I/DvXj\n" "W7UUNdgFwii/GW+6M0uUDy23UVQpbFzcV8o1C2nZc4Fb4zwBAoIBAQDKSJkFwwuR\n" "naVJS6WxOKjX8MCu9/cKPnwBv2mmI2jgGxHTw5sr3ahmF5eTb8Zo19BowytN+tr6\n" "2ZFoIBA9Ubc9esEAU8l3fggdfM82cuR9sGcfQVoCh8tMg6BP8IBLOmbSUhN3PG2m\n" "39I802u0fFNVQCJKhx1m1MFFLOu7lVcDS9JN+oYVPb6MDfBLm5jOiPuYkFZ4gH79\n" "J7gXI0/YKhaJ7yXthYVkdrSF6Eooer4RZgma62Dd1VNzSq3JBo6rYjF7Lvd+RwDC\n" "R1thHrmf/IXplxpNVkoMVxtzbrrbgnC25QmvRYc0rlS/kvM4yQhMH3eA7IycDZMp\n" "Y+0xm7I7jTT7AoIBAGKzKIMDXdCxBWKhNYJ8z7hiItNl1IZZMW2TPUiY0rl6yaCh\n" "BVXjM9W0r07QPnHZsUiByqb743adkbTUjmxdJzjaVtxN7ZXwZvOVrY7I7fPWYnCE\n" "fXCr4+IVpZI/ZHZWpGX6CGSgT6EOjCZ5IUufIvEpqVSmtF8MqfXO9o9uIYLokrWQ\n" "x1dBl5UnuTLDqw8bChq7O5y6yfuWaOWvL7nxI8NvSsfj4y635gIa/0dFeBYZEfHI\n" "UlGdNVomwXwYEzgE/c19ruIowX7HU/NgxMWTMZhpazlxgesXybel+YNcfDQ4e3RM\n" "OMz3ZFiaMaJsGGNf4++d9TmMgk4Ns6oDs6Tb9AECggEBAJYzd+SOYo26iBu3nw3L\n" "65uEeh6xou8pXH0Tu4gQrPQTRZZ/nT3iNgOwqu1gRuxcq7TOjt41UdqIKO8vN7/A\n" "aJavCpaKoIMowy/aGCbvAvjNPpU3unU8jdl/t08EXs79S5IKPcgAx87sTTi7KDN5\n" "SYt4tr2uPEe53NTXuSatilG5QCyExIELOuzWAMKzg7CAiIlNS9foWeLyVkBgCQ6S\n" "me/L8ta+mUDy37K6vC34jh9vK9yrwF6X44ItRoOJafCaVfGI+175q/eWcqTX4q+I\n" "G4tKls4sL4mgOJLq+ra50aYMxbcuommctPMXU6CrrYyQpPTHMNVDQy2ttFdsq9iK\n" "TncCggEBAMmt/8yvPflS+xv3kg/ZBvR9JB1In2n3rUCYYD47ReKFqJ03Vmq5C9nY\n" "56s9w7OUO8perBXlJYmKZQhO4293lvxZD2Iq4NcZbVSCMoHAUzhzY3brdgtSIxa2\n" "gGveGAezZ38qKIU26dkz7deECY4vrsRkwhpTW0LGVCpjcQoaKvymAoCmAs8V2oMr\n" "Ziw1YQ9uOUoWwOqm1wZqmVcOXvPIS2gWAs3fQlWjH9hkcQTMsUaXQDOD0aqkSY3E\n" "NqOvbCV1/oUpRi3076khCoAXI1bKSn/AvR3KDP14B5toHI/F5OTSEiGhhHesgRrs\n" "fBrpEY1IATtPq1taBZZogRqI3rOkkPk=\n" "-----END PRIVATE KEY-----\n"; int test_jwt_RS256(struct lws_context *context) { struct lws_jwk jwk; struct lws_x509_cert *pub = NULL; int ret = -1; int ret_encode; char sha1_fingerprint[30]; uint8_t sha1sum[20]; char der_buf[LWS_ARRAY_SIZE(rsa_cert)]; union lws_tls_cert_info_results *der_info = (union lws_tls_cert_info_results *)der_buf; if (lws_x509_create(&pub)) { lwsl_err("%s: failed to create x509 public key\n", __func__); goto bail; } if (lws_x509_parse_from_pem(pub, rsa_cert, LWS_ARRAY_SIZE(rsa_cert))) { lwsl_err("%s: failed to parse x509 public key\n", __func__); goto bail; } if (lws_x509_public_to_jwk(&jwk, pub, NULL, 2048)) { lwsl_err("%s: failed to copy public key to jwk\n", __func__); goto bail; } if (lws_x509_jwk_privkey_pem(context, &jwk, (char *)rsa_key, LWS_ARRAY_SIZE(rsa_key), NULL)) { lwsl_err("%s: failed to copy private key to jwk\n", __func__); goto bail; } if (lws_x509_info(pub, LWS_TLS_CERT_INFO_DER_RAW, der_info, LWS_ARRAY_SIZE(der_buf) - sizeof(*der_info) + sizeof(der_info->ns.name)) || der_info->ns.len <= 0) { lwsl_err("%s: failed to parse x509 public key\n", __func__); goto bail; } if (!lws_SHA1((unsigned char *)der_info->ns.name, (size_t)der_info->ns.len, sha1sum)) { lwsl_err("%s: sha1sum of public key failed\n", __func__); goto bail; } ret_encode = lws_b64_encode_string_url((char *)sha1sum, LWS_ARRAY_SIZE(sha1sum), sha1_fingerprint, LWS_ARRAY_SIZE(sha1_fingerprint)); if (ret_encode < 0) { lwsl_err("%s: failed to encode sha1sum to base64url\n", __func__); goto bail; } while (sha1_fingerprint[--ret_encode] == '=') sha1_fingerprint[ret_encode] = '\0'; lwsl_notice("%s: cert fingerprint '%s'\n", __func__, sha1_fingerprint); /* now produce jwt with some additional header fields */ { unsigned long long ull = lws_now_secs(); char buf[8192]; size_t cml = 2048, cml2 = 2048; const char hdr_fmt[] = "{\"alg\":\"RS256\", \"typ\":\"JWT\", \"x5t\":\"%s\"}"; char jose_hdr[LWS_ARRAY_SIZE(hdr_fmt) + LWS_ARRAY_SIZE(sha1_fingerprint)]; struct lws_jwt_sign_info info = { .alg = NULL, .jose_hdr = jose_hdr, .jose_hdr_len = (size_t)lws_snprintf(jose_hdr, LWS_ARRAY_SIZE(jose_hdr), hdr_fmt, sha1_fingerprint), .out = buf, .out_len = &cml2, .temp = buf + cml2, .tl = 4096 }; lwsl_notice("%s: jose_hdr of len %zu: '%s'\n", __func__, info.jose_hdr_len, info.jose_hdr); if (lws_jwt_sign_via_info(context, &jwk, &info, "{\"iss\":\"warmcat.com\",\"aud\":" "\"https://libwebsockets.org/sai\"," "\"iat\":%llu," "\"nbf\":%llu," "\"exp\":%llu," "\"sub\":\"manage\"}", ull, ull - 60, ull + (30 * 24 * 3600) )) { lwsl_err("%s: failed to create JWT\n", __func__); goto bail1; } lwsl_notice("%s: jwt test '%s'\n", __func__, buf); if (lws_jwt_signed_validate(context, &jwk, "RS256", (const char *)buf, cml2, (char *)buf + 2048, 2048, (char *)buf + 4096, &cml)) { lwsl_err("%s: failed to parse JWT\n", __func__); goto bail1; } lwsl_notice("%s: jwt valid, payload '%s'\n", __func__, buf + 4096); } /* end */ ret = 0; bail1: lws_jwk_destroy(&jwk); lws_x509_destroy(&pub); bail: lwsl_notice("%s: selftest %s\n", __func__, ret ? "FAIL" : "OK"); return ret; } int test_jws(struct lws_context *context) { int n = 0; n |= test_jws_none(context); n |= test_jws_HS256(context); n |= test_jws_RS256(context); n |= test_jws_ES256(context); n |= test_jws_ES512(context); n |= test_jwt_RS256(context); return n; }