diff --git a/certs/test/cert-too-many-name-constraints.pem b/certs/test/cert-too-many-name-constraints.pem new file mode 100644 index 0000000000..30ee2b8881 --- /dev/null +++ b/certs/test/cert-too-many-name-constraints.pem @@ -0,0 +1,59 @@ +-----BEGIN CERTIFICATE----- +MIIKqTCCCZGgAwIBAgIUFFokI9Yd3KH+eqBsRLhoud4uIc8wDQYJKoZIhvcNAQEL +BQAwgY8xCzAJBgNVBAYTAlVTMQswCQYDVQQIDAJOWTERMA8GA1UEBwwITmV3IFlv +cmsxGDAWBgNVBAoMD0ZvbyBDb21wYW55IExMQzEcMBoGA1UEAwwTZm9vLWNvbXBh +bnktbGxjLmNvbTEoMCYGCSqGSIb3DQEJARYZYWRtaW5AZm9vLWNvbXBhbnktbGxj +LmNvbTAeFw0yNDA1MjkyMjI2NDhaFw0yNDA2MjgyMjI2NDhaMIGPMQswCQYDVQQG +EwJVUzELMAkGA1UECAwCTlkxETAPBgNVBAcMCE5ldyBZb3JrMRgwFgYDVQQKDA9G +b28gQ29tcGFueSBMTEMxHDAaBgNVBAMME2Zvby1jb21wYW55LWxsYy5jb20xKDAm +BgkqhkiG9w0BCQEWGWFkbWluQGZvby1jb21wYW55LWxsYy5jb20wggEiMA0GCSqG +SIb3DQEBAQUAA4IBDwAwggEKAoIBAQDSzHEKxR2tQ8ykY1j0zW3oOmwBgFAPNgyJ +oODAdBKqVCXb2P8UQ1zAaQzZeJj6GS96e6eyBUDGOLtb9V4EcSxtY/KBUEWoYp+7 +UKu4BYOIkzLMxjmea9BLXHM8j4GpD7gSruqlksELXh8xtVUfuABW7gzARJ34dugt 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+ggkuZXg5OC5jb20wC4IJLmV4OTkuY29tMAyCCi5leDEwMC5jb20wDIIKLmV4MTAx +LmNvbTAMggouZXgxMDIuY29tMAyCCi5leDEwMy5jb20wDIIKLmV4MTA0LmNvbTAM +ggouZXgxMDUuY29tMAyCCi5leDEwNi5jb20wDIIKLmV4MTA3LmNvbTAMggouZXgx +MDguY29tMAyCCi5leDEwOS5jb20wDIIKLmV4MTEwLmNvbTAMggouZXgxMTEuY29t +MAyCCi5leDExMi5jb20wDIIKLmV4MTEzLmNvbTAMggouZXgxMTQuY29tMAyCCi5l +eDExNS5jb20wDIIKLmV4MTE2LmNvbTAMggouZXgxMTcuY29tMAyCCi5leDExOC5j +b20wDIIKLmV4MTE5LmNvbTAMggouZXgxMjAuY29tMAyCCi5leDEyMS5jb20wDIIK +LmV4MTIyLmNvbTAMggouZXgxMjMuY29tMAyCCi5leDEyNC5jb20wDIIKLmV4MTI1 +LmNvbTAMggouZXgxMjYuY29tMAyCCi5leDEyNy5jb20wDIIKLmV4MTI4LmNvbTAM +ggouZXgxMjkuY29tMAyCCi5leDEzMC5jb20wHQYDVR0OBBYEFJvjzAGexe5bKTQ1 +CMkebDRYUHXAMA0GCSqGSIb3DQEBCwUAA4IBAQB/5AdXGRIgVuwQBvU/CGMuMFwv +lx62SLuzAKSVMmX08Odpuh0CnGeWBonmu5rZWOqYAwTRypZxksf1Ke0eVp8bRAiR +lMo0iFNm90deH8pPC/jSuH5OGV77F+kQAqHcnCP4unZVzq+XRDLiHEAsyAOjGx8o +9mO9DwzFa1KK8jvCYkNUkgHa9Xow6ExlJ/UJCuG0nvFDXcG4VUcFSSR3zTTOg970 +kcoMOLfPNvFQ/+UPT/XwgySuauHdt38xoBdL3BjdOIU6WWVplg14fiwKg8ut9ZQH +HYDIkDks1kiG9W9tg+9YeG/taUtcCtSfs2NdCmOHJOFHulvqI+A2ADQWgDH9 +-----END CERTIFICATE----- diff --git a/tests/api.c b/tests/api.c index 785924a16a..60706f35f0 100644 --- a/tests/api.c +++ b/tests/api.c @@ -41261,6 +41261,297 @@ static int test_wolfSSL_X509_bad_altname(void) return EXPECT_RESULT(); } +static int test_wolfSSL_X509_max_altnames(void) +{ + EXPECT_DECLS; +#if defined(OPENSSL_EXTRA) && !defined(NO_CERTS) && !defined(NO_RSA) + + /* Only test if max alt names has not been modified */ +#if WOLFSSL_MAX_ALT_NAMES == 128 + /* A certificate encoded with 130 subject alternative names */ + const unsigned char too_many_altnames_cert[] = { + 0x30, 0x82, 0x0b, 0x98, 0x30, 0x82, 0x0a, 0x80, 0xa0, 0x03, 0x02, 0x01, + 0x02, 0x02, 0x14, 0x62, 0x32, 0xa6, 0x54, 0x73, 0x2f, 0xdb, 0x7d, 0x49, + 0x40, 0x69, 0xc0, 0x5a, 0x9b, 0x60, 0xfe, 0x04, 0x4f, 0x02, 0xd5, 0x30, + 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x0b, + 0x05, 0x00, 0x30, 0x81, 0x8f, 0x31, 0x0b, 0x30, 0x09, 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X509* x509 = NULL; + int certSize = (int)sizeof(too_many_altnames_cert) / sizeof(unsigned char); + + ExpectNull(x509 = wolfSSL_X509_load_certificate_buffer( + too_many_altnames_cert, certSize, SSL_FILETYPE_ASN1)); +#endif +#endif + return EXPECT_RESULT(); +} + +static int test_wolfSSL_X509_max_name_constraints(void) +{ + EXPECT_DECLS; +#if !defined(NO_FILESYSTEM) && !defined(NO_CERTS) && !defined(NO_RSA) && \ + !defined(NO_WOLFSSL_CLIENT) + + /* Only test if max name constraints has not been modified */ +#if WOLFSSL_MAX_NAME_CONSTRAINTS == 128 + WOLFSSL_CTX* ctx = NULL; + /* File contains a certificate with 130 name constraints */ + const char* malformed_ca_cert = "./certs/test/cert-too-many-name-constraints.pem"; + + ExpectNotNull(ctx = wolfSSL_CTX_new(wolfSSLv23_client_method())); + + ExpectIntNE(wolfSSL_CTX_load_verify_locations_ex(ctx, malformed_ca_cert, NULL, + WOLFSSL_LOAD_FLAG_NONE), WOLFSSL_SUCCESS); +#endif + +#endif + return EXPECT_RESULT(); +} + static int test_wolfSSL_X509(void) { EXPECT_DECLS; @@ -72838,6 +73129,8 @@ TEST_CASE testCases[] = { TEST_DECL(test_wolfSSL_X509_check_ca), TEST_DECL(test_wolfSSL_X509_check_ip_asc), TEST_DECL(test_wolfSSL_X509_bad_altname), + TEST_DECL(test_wolfSSL_X509_max_altnames), + TEST_DECL(test_wolfSSL_X509_max_name_constraints), TEST_DECL(test_wolfSSL_make_cert), #ifndef NO_BIO diff --git a/wolfcrypt/src/asn.c b/wolfcrypt/src/asn.c index f5ed8804ff..ee019dc505 100644 --- a/wolfcrypt/src/asn.c +++ b/wolfcrypt/src/asn.c @@ -18944,6 +18944,7 @@ static int DecodeAltNames(const byte* input, word32 sz, DecodedCert* cert) word32 idx = 0; int length = 0; int ret = 0; + word32 numNames = 0; WOLFSSL_ENTER("DecodeAltNames"); @@ -18974,6 +18975,13 @@ static int DecodeAltNames(const byte* input, word32 sz, DecodedCert* cert) } while ((ret == 0) && (idx < sz)) { + numNames++; + if (numNames > WOLFSSL_MAX_ALT_NAMES) { + WOLFSSL_MSG("\tToo many subject alternative names"); + ret = ASN_ALT_NAME_E; + break; + } + ASNGetData dataASN[altNameASN_Length]; /* Clear dynamic data items. */ @@ -20086,13 +20094,16 @@ static int DecodeSubtreeGeneralName(const byte* input, word32 sz, byte tag, * @param [in] input Buffer holding data. * @param [in] sz Size of data in buffer. * @param [in, out] head Linked list of subtree names. + * @param [in] limit If > 0, limit on number of tree + * entries to process, exceeding + * is an error. * @param [in] heap Dynamic memory hint. * @return 0 on success. * @return MEMORY_E when dynamic memory allocation fails. * @return ASN_PARSE_E when SEQUENCE is not found as expected. */ static int DecodeSubtree(const byte* input, word32 sz, Base_entry** head, - void* heap) + word32 limit, void* heap) { #ifndef WOLFSSL_ASN_TEMPLATE word32 idx = 0; @@ -20170,6 +20181,7 @@ static int DecodeSubtree(const byte* input, word32 sz, Base_entry** head, DECL_ASNGETDATA(dataASN, subTreeASN_Length); word32 idx = 0; int ret = 0; + word32 cnt = 0; (void)heap; @@ -20179,6 +20191,14 @@ static int DecodeSubtree(const byte* input, word32 sz, Base_entry** head, while ((ret == 0) && (idx < (word32)sz)) { byte minVal = 0; byte maxVal = 0; + if (limit > 0) { + cnt++; + if (cnt > limit) { + WOLFSSL_MSG("too many name constraints"); + ret = ASN_NAME_INVALID_E; + break; + } + } /* Clear dynamic data and set choice for GeneralName and location to * store minimum and maximum. @@ -20277,7 +20297,7 @@ static int DecodeNameConstraints(const byte* input, word32 sz, } if (DecodeSubtree(input + idx, (word32)length, subtree, - cert->heap) < 0) { + WOLFSSL_MAX_NAME_CONSTRAINTS, cert->heap) < 0) { WOLFSSL_MSG("\terror parsing subtree"); return ASN_PARSE_E; } @@ -20304,7 +20324,8 @@ static int DecodeNameConstraints(const byte* input, word32 sz, ret = DecodeSubtree( dataASN[NAMECONSTRAINTSASN_IDX_PERMIT].data.ref.data, dataASN[NAMECONSTRAINTSASN_IDX_PERMIT].data.ref.length, - &cert->permittedNames, cert->heap); + &cert->permittedNames, WOLFSSL_MAX_NAME_CONSTRAINTS, + cert->heap); } } if (ret == 0) { @@ -20313,7 +20334,8 @@ static int DecodeNameConstraints(const byte* input, word32 sz, ret = DecodeSubtree( dataASN[NAMECONSTRAINTSASN_IDX_EXCLUDE].data.ref.data, dataASN[NAMECONSTRAINTSASN_IDX_EXCLUDE].data.ref.length, - &cert->excludedNames, cert->heap); + &cert->excludedNames, WOLFSSL_MAX_NAME_CONSTRAINTS, + cert->heap); } } diff --git a/wolfssl/wolfcrypt/asn.h b/wolfssl/wolfcrypt/asn.h index d848dbc4dc..aa1bae10dc 100644 --- a/wolfssl/wolfcrypt/asn.h +++ b/wolfssl/wolfcrypt/asn.h @@ -780,6 +780,14 @@ extern const WOLFSSL_ObjectInfo wolfssl_object_info[]; #define WOLFSSL_TLS_FEATURE_SUM 92 #endif +#ifndef WOLFSSL_MAX_ALT_NAMES +#define WOLFSSL_MAX_ALT_NAMES 128 +#endif + +#ifndef WOLFSSL_MAX_NAME_CONSTRAINTS +#define WOLFSSL_MAX_NAME_CONSTRAINTS 128 +#endif + #if defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL) /* NIDs */ #define NID_undef 0