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Endi S. Dewata edited this page Jul 11, 2022 · 3 revisions

Ciphers

The list of implemented ciphers are defined in sslenum.c:

const PRUint16 SSL_ImplementedCiphers[] = {
    TLS_AES_128_GCM_SHA256,
    TLS_CHACHA20_POLY1305_SHA256,
    TLS_AES_256_GCM_SHA384,

    TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
    TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
    TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,
    TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
    TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
    TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
    /* TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA must appear before
     * TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA to work around bug 946147.
     */
    TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
    TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
    TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
    TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,
    TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,
    TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
    TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384,
    TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384,
    TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA,
    TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,
    TLS_ECDHE_ECDSA_WITH_RC4_128_SHA,
    TLS_ECDHE_RSA_WITH_RC4_128_SHA,

    TLS_DHE_RSA_WITH_AES_128_GCM_SHA256,
    TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
    TLS_DHE_DSS_WITH_AES_128_GCM_SHA256,
    TLS_DHE_RSA_WITH_AES_256_GCM_SHA384,
    TLS_DHE_DSS_WITH_AES_256_GCM_SHA384,
    TLS_DHE_RSA_WITH_AES_128_CBC_SHA,
    TLS_DHE_DSS_WITH_AES_128_CBC_SHA,
    TLS_DHE_RSA_WITH_AES_128_CBC_SHA256,
    TLS_DHE_DSS_WITH_AES_128_CBC_SHA256,
    TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA,
    TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA,
    TLS_DHE_RSA_WITH_AES_256_CBC_SHA,
    TLS_DHE_DSS_WITH_AES_256_CBC_SHA,
    TLS_DHE_RSA_WITH_AES_256_CBC_SHA256,
    TLS_DHE_DSS_WITH_AES_256_CBC_SHA256,
    TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA,
    TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA,
    TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA,
    TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA,
    TLS_DHE_DSS_WITH_RC4_128_SHA,

    TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA,
    TLS_ECDH_RSA_WITH_AES_128_CBC_SHA,
    TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA,
    TLS_ECDH_RSA_WITH_AES_256_CBC_SHA,
    TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA,
    TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA,
    TLS_ECDH_ECDSA_WITH_RC4_128_SHA,
    TLS_ECDH_RSA_WITH_RC4_128_SHA,

    TLS_RSA_WITH_AES_128_GCM_SHA256,
    TLS_RSA_WITH_AES_256_GCM_SHA384,
    TLS_RSA_WITH_AES_128_CBC_SHA,
    TLS_RSA_WITH_AES_128_CBC_SHA256,
    TLS_RSA_WITH_CAMELLIA_128_CBC_SHA,
    TLS_RSA_WITH_AES_256_CBC_SHA,
    TLS_RSA_WITH_AES_256_CBC_SHA256,
    TLS_RSA_WITH_CAMELLIA_256_CBC_SHA,
    TLS_RSA_WITH_SEED_CBC_SHA,
    TLS_RSA_WITH_3DES_EDE_CBC_SHA,
    TLS_RSA_WITH_RC4_128_SHA,
    TLS_RSA_WITH_RC4_128_MD5,

    /* 56-bit DES "domestic" cipher suites */
    TLS_DHE_RSA_WITH_DES_CBC_SHA,
    TLS_DHE_DSS_WITH_DES_CBC_SHA,
    TLS_RSA_WITH_DES_CBC_SHA,

    /* ciphersuites with no encryption */
    TLS_ECDHE_ECDSA_WITH_NULL_SHA,
    TLS_ECDHE_RSA_WITH_NULL_SHA,
    TLS_ECDH_RSA_WITH_NULL_SHA,
    TLS_ECDH_ECDSA_WITH_NULL_SHA,
    TLS_RSA_WITH_NULL_SHA,
    TLS_RSA_WITH_NULL_SHA256,
    TLS_RSA_WITH_NULL_MD5,

    0
};

const PRUint16 SSL_NumImplementedCiphers =
    (sizeof SSL_ImplementedCiphers) / (sizeof SSL_ImplementedCiphers[0]) - 1;

To get supported SSL version range:

int option = <ssl_variant_stream | ssl_variant_datagram>;
SSLVersionRange range;

SSL_VersionRangeGetSupported(option, &range);

To set SSL version range for all subsequently opened sockets:

int option = <ssl_variant_stream | ssl_variant_datagram>;
SSLVersionRange range;

range.min = <SSL_LIBRARY_VERSION_3_0 | SSL_LIBRARY_VERSION_TLS_1_0 | SSL_LIBRARY_VERSION_TLS_1_1 | SSL_LIBRARY_VERSION_TLS_1_2>;
range.max = <SSL_LIBRARY_VERSION_3_0 | SSL_LIBRARY_VERSION_TLS_1_0 | SSL_LIBRARY_VERSION_TLS_1_1 | SSL_LIBRARY_VERSION_TLS_1_2>;

SSL_VersionRangeSetDefault(option, &range);

To enable or disable SSL 2 or SSL 3 cipher suites:

int cipherID = ...;
int enabled = ...;

SSL_CipherPrefSetDefault(cipher, enabled);

Deprecated

To change the default value of a specified SSL option for all subsequently opened sockets:

int option = <SSL_ENABLE_SSL2 | SSL_ENABLE_SSL3 | SSL_ENABLE_TLS>;
int enabled = ...;

SSL_OptionSetDefault(option, enabled);

SSL Alert Callback

Bad Certificate Handler

Prepare a callback function:

SECStatus badCertHandler(void *arg, PRFileDec *fd) {
    return SECFailure;
}

To register the callback function:

SECStatus status = SSL_BadCertHook(fd, badCertHandler, socket);

See also SSL_BadCertHook.

Handshake Callback

Prepare a callback function:

void handshakeCallback(PRFileDesc *fd, void *arg) {
}

To register the callback function:

status = SSL_HandshakeCallback(fd, handshakeCallback, socket);

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