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OpenSSL: Use connection certificate chain with PKCS#12 extra certs

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When using OpenSSL 1.0.2 or newer, this replaces the older
SSL_CTX_add_extra_chain_cert() design with SSL_add1_chain_cert() to keep
the extra chain certificates out from SSL_CTX and specific to each
connection. In addition, build and rearrange extra certificates with
SSL_build_cert_chain() to avoid incorrect certificates and incorrect
order of certificates in the TLS handshake.

Signed-off-by: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2015-08-11 01:02:27 +03:00
parent 0d2c0e6776
commit de2a7b796d
1 changed files with 30 additions and 0 deletions
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30
src/crypto/tls_openssl.c
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@ -2112,6 +2112,35 @@ static int tls_parse_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, PKCS12 *p12,
} }
if (certs) { if (certs) {
#if OPENSSL_VERSION_NUMBER >= 0x10002000L
SSL_clear_chain_certs(ssl);
while ((cert = sk_X509_pop(certs)) != NULL) {
X509_NAME_oneline(X509_get_subject_name(cert), buf,
sizeof(buf));
wpa_printf(MSG_DEBUG, "TLS: additional certificate"
" from PKCS12: subject='%s'", buf);
if (SSL_add1_chain_cert(ssl, cert) != 1) {
res = -1;
break;
}
}
sk_X509_free(certs);
res = SSL_build_cert_chain(ssl,
SSL_BUILD_CHAIN_FLAG_CHECK |
SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR);
if (!res) {
tls_show_errors(MSG_DEBUG, __func__,
"Failed to build certificate chain");
} else if (res == 2) {
wpa_printf(MSG_DEBUG,
"TLS: Ignore certificate chain verification error when building chain with PKCS#12 extra certificates");
}
/*
* Try to continue regardless of result since it is possible for
* the extra certificates not to be required.
*/
res = 0;
#else /* OPENSSL_VERSION_NUMBER >= 0x10002000L */
#if OPENSSL_VERSION_NUMBER >= 0x10001000L #if OPENSSL_VERSION_NUMBER >= 0x10001000L
SSL_CTX_clear_extra_chain_certs(ssl_ctx); SSL_CTX_clear_extra_chain_certs(ssl_ctx);
#endif /* OPENSSL_VERSION_NUMBER >= 0x10001000L */ #endif /* OPENSSL_VERSION_NUMBER >= 0x10001000L */
@ -2130,6 +2159,7 @@ static int tls_parse_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, PKCS12 *p12,
} }
} }
sk_X509_free(certs); sk_X509_free(certs);
#endif /* OPENSSL_VERSION_NUMBER >= 0x10002000L */
} }
PKCS12_free(p12); PKCS12_free(p12);