Fix for peer cert verify with IP address

This commit is contained in:
Eric Blankenhorn
2026-04-08 15:47:57 -05:00
parent 1d363f3adc
commit 1e1e34ce8c
2 changed files with 166 additions and 1 deletions
+4 -1
View File
@@ -13488,7 +13488,10 @@ int CheckHostName(DecodedCert* dCert, const char *domainName,
}
#ifndef WOLFSSL_HOSTNAME_VERIFY_ALT_NAME_ONLY
if (checkCN == 1) {
/* RFC 6125: IP address identities must appear in an iPAddress SAN and
* must never be matched against the Subject Common Name. Skip the CN
* fallback when verifying an IP address. */
if (checkCN == 1 && !isIP) {
if (MatchDomainName(dCert->subjectCN, dCert->subjectCNLen,
domainName, (word32)domainNameLen, flags) == 1) {
ret = 0;
+162
View File
@@ -1060,6 +1060,168 @@ int test_wolfSSL_X509_check_ip_asc(void)
ExpectIntEQ(wolfSSL_X509_check_ip_asc(NULL, "0.0.0.0", 0), 0);
ExpectIntEQ(wolfSSL_X509_check_ip_asc(empty, "127.128.0.255", 0), 0);
/* Regression test: a certificate with CN=<ip> and no SAN extension
* must NOT be accepted for IP verification. RFC 6125 requires that IP
* identities appear in an iPAddress SAN; the Subject CN must never be
* matched against an IP address. Likewise a CN of "*.0.0.1" must not
* wildcard-match "127.0.0.1" -- RFC 6125 Section 7.2 prohibits wildcard
* matching for IP addresses. */
{
/* Self-signed cert, Subject CN="127.0.0.1", no extensions. */
static const unsigned char cn_ip_literal_der[] = {
0x30, 0x82, 0x02, 0xaf, 0x30, 0x82, 0x01, 0x97, 0x02, 0x14, 0x03,
0xe8, 0x5c, 0xb5, 0x56, 0x65, 0x58, 0xd4, 0xd9, 0x86, 0x9c, 0xe7,
0x5b, 0x71, 0xe9, 0xd3, 0x33, 0xe1, 0xa2, 0xdc, 0x30, 0x0d, 0x06,
0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x0b, 0x05,
0x00, 0x30, 0x14, 0x31, 0x12, 0x30, 0x10, 0x06, 0x03, 0x55, 0x04,
0x03, 0x0c, 0x09, 0x31, 0x32, 0x37, 0x2e, 0x30, 0x2e, 0x30, 0x2e,
0x31, 0x30, 0x1e, 0x17, 0x0d, 0x32, 0x36, 0x30, 0x34, 0x30, 0x38,
0x32, 0x30, 0x32, 0x35, 0x33, 0x33, 0x5a, 0x17, 0x0d, 0x33, 0x36,
0x30, 0x34, 0x30, 0x35, 0x32, 0x30, 0x32, 0x35, 0x33, 0x33, 0x5a,
0x30, 0x14, 0x31, 0x12, 0x30, 0x10, 0x06, 0x03, 0x55, 0x04, 0x03,
0x0c, 0x09, 0x31, 0x32, 0x37, 0x2e, 0x30, 0x2e, 0x30, 0x2e, 0x31,
0x30, 0x82, 0x01, 0x22, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48,
0x86, 0xf7, 0x0d, 0x01, 0x01, 0x01, 0x05, 0x00, 0x03, 0x82, 0x01,
0x0f, 0x00, 0x30, 0x82, 0x01, 0x0a, 0x02, 0x82, 0x01, 0x01, 0x00,
0xb9, 0xcc, 0x99, 0xf7, 0xbf, 0x7c, 0x4f, 0xec, 0x7f, 0xe6, 0x17,
0x4e, 0xe3, 0xd9, 0xe5, 0x25, 0x7d, 0xab, 0xa8, 0x66, 0xb0, 0x4d,
0x41, 0x5c, 0x20, 0xd8, 0x67, 0xf5, 0xa3, 0xcd, 0x9e, 0x12, 0x7f,
0x09, 0x00, 0xeb, 0x6b, 0xfc, 0x7e, 0x14, 0x10, 0xa0, 0x10, 0x2e,
0x1f, 0xe8, 0xad, 0xec, 0xe8, 0x86, 0x54, 0xa2, 0xc4, 0x58, 0x65,
0x26, 0x95, 0x76, 0xa1, 0xe1, 0x02, 0x52, 0x81, 0xcb, 0x7e, 0x8e,
0xb2, 0x31, 0xc9, 0x58, 0x9a, 0xdc, 0x69, 0xab, 0x8d, 0x23, 0xcd,
0x96, 0x19, 0x1c, 0x68, 0x69, 0xb5, 0x7d, 0x23, 0xe3, 0x58, 0xe6,
0x26, 0xcc, 0x05, 0x40, 0xd2, 0xa9, 0xb1, 0x09, 0x9c, 0xc8, 0x4a,
0xfc, 0x0a, 0x20, 0xba, 0xc0, 0x12, 0x3b, 0x97, 0x44, 0x2b, 0x30,
0x50, 0x86, 0x0b, 0x27, 0x13, 0x76, 0xb5, 0xf7, 0x80, 0xf0, 0xf2,
0xf0, 0x93, 0x3b, 0x8d, 0xa8, 0x4f, 0xa3, 0xa9, 0xd2, 0xea, 0xd3,
0xc3, 0xcb, 0xcc, 0x70, 0xa0, 0x0b, 0xc7, 0xc6, 0x3e, 0xc9, 0x27,
0x4c, 0xb5, 0x23, 0x35, 0x6c, 0xb0, 0x30, 0xa2, 0xc1, 0x6d, 0x07,
0xd0, 0x9b, 0x55, 0x6a, 0xf9, 0x18, 0xf0, 0x30, 0x74, 0x3f, 0xf6,
0x17, 0x85, 0xb7, 0xcf, 0xa5, 0xd4, 0x91, 0xaa, 0x54, 0x85, 0xec,
0xae, 0xc5, 0x32, 0xf2, 0xb0, 0x21, 0x5a, 0x90, 0x22, 0x66, 0x8b,
0x4b, 0x0d, 0xc3, 0x57, 0x81, 0x86, 0xf2, 0xbb, 0xd2, 0x3b, 0x8c,
0xfc, 0xee, 0xbd, 0xed, 0xf0, 0xfb, 0xa5, 0xe1, 0x91, 0x5a, 0x68,
0x07, 0x60, 0x38, 0x38, 0xe7, 0x48, 0xe3, 0x83, 0xd6, 0xaf, 0xf0,
0x03, 0x7e, 0x2e, 0x95, 0x0c, 0x33, 0xcf, 0x13, 0xe9, 0xec, 0xe7,
0xa4, 0x5e, 0xed, 0x02, 0xae, 0xf2, 0x30, 0x6f, 0x3f, 0xc4, 0x1b,
0x3a, 0x0a, 0xe8, 0xd3, 0x66, 0x32, 0xd6, 0xfd, 0x58, 0x3a, 0x65,
0x93, 0x99, 0xc7, 0x02, 0x03, 0x01, 0x00, 0x01, 0x30, 0x0d, 0x06,
0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x0b, 0x05,
0x00, 0x03, 0x82, 0x01, 0x01, 0x00, 0x3c, 0xa7, 0xdf, 0xd1, 0x44,
0xc5, 0x4d, 0x29, 0x38, 0x51, 0x9d, 0xf6, 0xee, 0x2f, 0x0c, 0xa3,
0x8a, 0x2a, 0x7c, 0xa1, 0xb1, 0x26, 0x6d, 0xfb, 0x8b, 0x5d, 0xed,
0xdc, 0x1f, 0xf2, 0xf1, 0x99, 0x3c, 0xd8, 0x36, 0xcd, 0x48, 0xf5,
0x91, 0x5b, 0x42, 0x98, 0x89, 0x29, 0xba, 0x46, 0xad, 0x93, 0xea,
0xea, 0x53, 0x17, 0xe4, 0x6d, 0xb7, 0xdc, 0xb5, 0x4a, 0xd8, 0xed,
0x5c, 0x39, 0x0c, 0xf6, 0x1d, 0x19, 0xfb, 0x22, 0x5d, 0xe4, 0x3f,
0x07, 0x20, 0x6d, 0x2e, 0xdc, 0x92, 0xa5, 0x56, 0xb3, 0x92, 0x74,
0x05, 0xb2, 0x7c, 0xed, 0x73, 0x83, 0x70, 0x5f, 0x0e, 0x75, 0xe1,
0x71, 0x4c, 0xc5, 0xf0, 0x26, 0xc5, 0xa6, 0xd4, 0xb6, 0xb4, 0x79,
0x99, 0x54, 0xd9, 0x21, 0x48, 0x2f, 0x52, 0x6e, 0x47, 0x1d, 0x1c,
0x3a, 0x3b, 0x2a, 0x36, 0xa8, 0x88, 0x95, 0x47, 0x67, 0x59, 0xd5,
0xee, 0xb6, 0xe9, 0x5b, 0x86, 0x1b, 0x8b, 0x6c, 0xa6, 0xb2, 0x91,
0x81, 0x0c, 0xca, 0x91, 0x33, 0x32, 0xe5, 0x0d, 0x8f, 0xda, 0xc7,
0x5b, 0xa6, 0x80, 0x3f, 0x71, 0x50, 0x56, 0xd2, 0x88, 0xfc, 0x53,
0xc5, 0x11, 0x45, 0x1e, 0x8a, 0xb7, 0x0a, 0x83, 0x9e, 0x89, 0x63,
0x24, 0x3e, 0x8c, 0xbd, 0xed, 0xec, 0xf4, 0x19, 0x32, 0x13, 0xcf,
0xe7, 0xdd, 0xe6, 0x84, 0xed, 0xe7, 0xf7, 0xf9, 0x50, 0x2f, 0x7b,
0xac, 0x7d, 0xf9, 0x0f, 0x61, 0xd1, 0xf7, 0x59, 0xf0, 0x91, 0x73,
0x26, 0x5a, 0xba, 0x24, 0xc8, 0x49, 0x86, 0xc1, 0x1a, 0x42, 0x68,
0x70, 0xbf, 0x94, 0x69, 0xd0, 0xd5, 0x26, 0x7e, 0x3c, 0xa9, 0x69,
0x6f, 0xb1, 0xcc, 0xdf, 0x4d, 0xed, 0x91, 0x6d, 0xdf, 0x45, 0x71,
0xf0, 0x88, 0x69, 0x74, 0x49, 0x2c, 0x5e, 0x77, 0xed, 0x92, 0x36,
0x7f, 0x1a, 0x83, 0x36, 0x42, 0x17, 0x5a, 0xda, 0x91
};
/* Self-signed cert, Subject CN="*.0.0.1", no extensions. */
static const unsigned char cn_ip_wildcard_der[] = {
0x30, 0x82, 0x02, 0xab, 0x30, 0x82, 0x01, 0x93, 0x02, 0x14, 0x3a,
0x4e, 0xfc, 0xf1, 0x5f, 0xcb, 0xe3, 0x6a, 0xae, 0x7f, 0xd6, 0x79,
0xbd, 0x40, 0xc9, 0x64, 0x41, 0xc6, 0xf0, 0x56, 0x30, 0x0d, 0x06,
0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x0b, 0x05,
0x00, 0x30, 0x12, 0x31, 0x10, 0x30, 0x0e, 0x06, 0x03, 0x55, 0x04,
0x03, 0x0c, 0x07, 0x2a, 0x2e, 0x30, 0x2e, 0x30, 0x2e, 0x31, 0x30,
0x1e, 0x17, 0x0d, 0x32, 0x36, 0x30, 0x34, 0x30, 0x38, 0x32, 0x30,
0x32, 0x35, 0x33, 0x33, 0x5a, 0x17, 0x0d, 0x33, 0x36, 0x30, 0x34,
0x30, 0x35, 0x32, 0x30, 0x32, 0x35, 0x33, 0x33, 0x5a, 0x30, 0x12,
0x31, 0x10, 0x30, 0x0e, 0x06, 0x03, 0x55, 0x04, 0x03, 0x0c, 0x07,
0x2a, 0x2e, 0x30, 0x2e, 0x30, 0x2e, 0x31, 0x30, 0x82, 0x01, 0x22,
0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01,
0x01, 0x01, 0x05, 0x00, 0x03, 0x82, 0x01, 0x0f, 0x00, 0x30, 0x82,
0x01, 0x0a, 0x02, 0x82, 0x01, 0x01, 0x00, 0xb9, 0xcc, 0x99, 0xf7,
0xbf, 0x7c, 0x4f, 0xec, 0x7f, 0xe6, 0x17, 0x4e, 0xe3, 0xd9, 0xe5,
0x25, 0x7d, 0xab, 0xa8, 0x66, 0xb0, 0x4d, 0x41, 0x5c, 0x20, 0xd8,
0x67, 0xf5, 0xa3, 0xcd, 0x9e, 0x12, 0x7f, 0x09, 0x00, 0xeb, 0x6b,
0xfc, 0x7e, 0x14, 0x10, 0xa0, 0x10, 0x2e, 0x1f, 0xe8, 0xad, 0xec,
0xe8, 0x86, 0x54, 0xa2, 0xc4, 0x58, 0x65, 0x26, 0x95, 0x76, 0xa1,
0xe1, 0x02, 0x52, 0x81, 0xcb, 0x7e, 0x8e, 0xb2, 0x31, 0xc9, 0x58,
0x9a, 0xdc, 0x69, 0xab, 0x8d, 0x23, 0xcd, 0x96, 0x19, 0x1c, 0x68,
0x69, 0xb5, 0x7d, 0x23, 0xe3, 0x58, 0xe6, 0x26, 0xcc, 0x05, 0x40,
0xd2, 0xa9, 0xb1, 0x09, 0x9c, 0xc8, 0x4a, 0xfc, 0x0a, 0x20, 0xba,
0xc0, 0x12, 0x3b, 0x97, 0x44, 0x2b, 0x30, 0x50, 0x86, 0x0b, 0x27,
0x13, 0x76, 0xb5, 0xf7, 0x80, 0xf0, 0xf2, 0xf0, 0x93, 0x3b, 0x8d,
0xa8, 0x4f, 0xa3, 0xa9, 0xd2, 0xea, 0xd3, 0xc3, 0xcb, 0xcc, 0x70,
0xa0, 0x0b, 0xc7, 0xc6, 0x3e, 0xc9, 0x27, 0x4c, 0xb5, 0x23, 0x35,
0x6c, 0xb0, 0x30, 0xa2, 0xc1, 0x6d, 0x07, 0xd0, 0x9b, 0x55, 0x6a,
0xf9, 0x18, 0xf0, 0x30, 0x74, 0x3f, 0xf6, 0x17, 0x85, 0xb7, 0xcf,
0xa5, 0xd4, 0x91, 0xaa, 0x54, 0x85, 0xec, 0xae, 0xc5, 0x32, 0xf2,
0xb0, 0x21, 0x5a, 0x90, 0x22, 0x66, 0x8b, 0x4b, 0x0d, 0xc3, 0x57,
0x81, 0x86, 0xf2, 0xbb, 0xd2, 0x3b, 0x8c, 0xfc, 0xee, 0xbd, 0xed,
0xf0, 0xfb, 0xa5, 0xe1, 0x91, 0x5a, 0x68, 0x07, 0x60, 0x38, 0x38,
0xe7, 0x48, 0xe3, 0x83, 0xd6, 0xaf, 0xf0, 0x03, 0x7e, 0x2e, 0x95,
0x0c, 0x33, 0xcf, 0x13, 0xe9, 0xec, 0xe7, 0xa4, 0x5e, 0xed, 0x02,
0xae, 0xf2, 0x30, 0x6f, 0x3f, 0xc4, 0x1b, 0x3a, 0x0a, 0xe8, 0xd3,
0x66, 0x32, 0xd6, 0xfd, 0x58, 0x3a, 0x65, 0x93, 0x99, 0xc7, 0x02,
0x03, 0x01, 0x00, 0x01, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48,
0x86, 0xf7, 0x0d, 0x01, 0x01, 0x0b, 0x05, 0x00, 0x03, 0x82, 0x01,
0x01, 0x00, 0x7f, 0x3a, 0xf8, 0x93, 0x41, 0x6f, 0xaa, 0xb7, 0xca,
0x17, 0x81, 0xa7, 0x3e, 0x9f, 0x0c, 0x6d, 0x14, 0x7b, 0x6f, 0x13,
0xf8, 0xbf, 0x63, 0x6e, 0x28, 0x57, 0x0b, 0x9a, 0xc2, 0x2a, 0x88,
0xc0, 0x35, 0x4b, 0xe3, 0x77, 0x31, 0x61, 0xff, 0xb4, 0x03, 0xe6,
0x11, 0x80, 0x1f, 0x35, 0x65, 0xf6, 0x47, 0x94, 0xe6, 0xb9, 0x60,
0x1e, 0xae, 0x9c, 0x90, 0xe8, 0x53, 0x8a, 0x46, 0x61, 0x28, 0xfa,
0x4b, 0xe0, 0x71, 0x98, 0xf4, 0x9e, 0xc8, 0x31, 0x98, 0x27, 0x71,
0x6e, 0x3c, 0x85, 0x15, 0x6d, 0x56, 0x20, 0x3b, 0x16, 0xe7, 0x64,
0xb8, 0x51, 0x9a, 0x72, 0x75, 0xa1, 0xd2, 0x2f, 0xcf, 0x2b, 0x61,
0xa2, 0xa8, 0x8b, 0x59, 0x27, 0x4c, 0x18, 0x59, 0x33, 0xbf, 0x9e,
0x5c, 0xef, 0xbe, 0x71, 0x62, 0x62, 0x20, 0xc8, 0xdc, 0xaf, 0x74,
0xaa, 0x7b, 0xaa, 0xaf, 0x37, 0x81, 0x65, 0xca, 0xf1, 0x7d, 0xd4,
0x58, 0x11, 0xd7, 0x18, 0xf7, 0x50, 0xa2, 0xa8, 0x89, 0x90, 0x7c,
0x30, 0xde, 0x2e, 0xf6, 0xbd, 0x3e, 0xbf, 0x14, 0x1e, 0xd4, 0x85,
0x8c, 0x38, 0x1c, 0xa4, 0x26, 0xb7, 0x86, 0xe5, 0x17, 0xfc, 0x67,
0x93, 0x86, 0x1c, 0x1f, 0x91, 0x6f, 0x8c, 0x99, 0xa6, 0x7f, 0x93,
0x92, 0xdb, 0x45, 0x75, 0xbb, 0xb0, 0x78, 0xa3, 0x8b, 0x67, 0xf7,
0x94, 0x26, 0xac, 0xb9, 0x4a, 0xca, 0x1f, 0x73, 0xfc, 0x52, 0x78,
0xb8, 0x14, 0x02, 0xbf, 0x69, 0x6f, 0x70, 0x21, 0xae, 0xd4, 0x12,
0x4f, 0xd1, 0x9f, 0xe6, 0x56, 0x11, 0x80, 0x39, 0x66, 0xe0, 0xd4,
0x56, 0x5b, 0x32, 0xc6, 0x6c, 0xb8, 0xd2, 0xf4, 0x23, 0x7f, 0xbb,
0x62, 0x2f, 0x5d, 0x67, 0x37, 0x38, 0x74, 0xca, 0xb3, 0x3f, 0x17,
0x53, 0x97, 0xa4, 0xbd, 0xda, 0x26, 0x6a, 0xb3, 0xd9, 0x9f, 0xac,
0xd2, 0x58, 0x4f, 0x24, 0x8c
};
WOLFSSL_X509 *cn_lit = NULL;
WOLFSSL_X509 *cn_wild = NULL;
ExpectNotNull(cn_lit = wolfSSL_X509_load_certificate_buffer(
cn_ip_literal_der, (int)sizeof(cn_ip_literal_der),
WOLFSSL_FILETYPE_ASN1));
ExpectNotNull(cn_wild = wolfSSL_X509_load_certificate_buffer(
cn_ip_wildcard_der, (int)sizeof(cn_ip_wildcard_der),
WOLFSSL_FILETYPE_ASN1));
/* CN=127.0.0.1 with no SAN must NOT match the IP "127.0.0.1". */
ExpectIntEQ(wolfSSL_X509_check_ip_asc(cn_lit, "127.0.0.1", 0), 0);
/* CN=*.0.0.1 with no SAN must NOT wildcard-match "127.0.0.1". */
ExpectIntEQ(wolfSSL_X509_check_ip_asc(cn_wild, "127.0.0.1", 0), 0);
/* CN-based hostname matching must still work for hostname checks
* (sanity check that the fix didn't over-correct). */
ExpectIntEQ(wolfSSL_X509_check_host(cn_wild, "1.0.0.1",
XSTRLEN("1.0.0.1"), 0, NULL), 1);
wolfSSL_X509_free(cn_wild);
wolfSSL_X509_free(cn_lit);
}
wolfSSL_X509_free(empty);
wolfSSL_X509_free(x509);
#endif