Initial import.

1 files changed, 896 insertions, 0 deletions

diff --git a/chromium/net/third_party/nss/ssl/derive.c b/chromium/net/third_party/nss/ssl/derive.c
new file mode 100644
index 00000000000..35cfe25122f
--- /dev/null
+++ b/chromium/net/third_party/nss/ssl/derive.c
@@ -0,0 +1,896 @@
+/*
+ * Key Derivation that doesn't use PKCS11
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "ssl.h" 	/* prereq to sslimpl.h */
+#include "certt.h"	/* prereq to sslimpl.h */
+#include "keythi.h"	/* prereq to sslimpl.h */
+#include "sslimpl.h"
+#ifndef NO_PKCS11_BYPASS
+#include "blapi.h"
+#endif
+
+#include "keyhi.h"
+#include "pk11func.h"
+#include "secasn1.h"
+#include "cert.h"
+#include "secmodt.h"
+
+#include "sslproto.h"
+#include "sslerr.h"
+
+#ifndef NO_PKCS11_BYPASS
+/* make this a macro! */
+#ifdef NOT_A_MACRO
+static void
+buildSSLKey(unsigned char * keyBlock, unsigned int keyLen, SECItem * result,
+            const char * label)
+{
+    result->type = siBuffer;
+    result->data = keyBlock;
+    result->len  = keyLen;
+    PRINT_BUF(100, (NULL, label, keyBlock, keyLen));
+}
+#else
+#define buildSSLKey(keyBlock, keyLen, result, label) \
+{ \
+    (result)->type = siBuffer; \
+    (result)->data = keyBlock; \
+    (result)->len  = keyLen; \
+    PRINT_BUF(100, (NULL, label, keyBlock, keyLen)); \
+}
+#endif
+
+/*
+ * SSL Key generation given pre master secret
+ */
+#ifndef NUM_MIXERS
+#define NUM_MIXERS 9
+#endif
+static const char * const mixers[NUM_MIXERS] = { 
+    "A", 
+    "BB", 
+    "CCC", 
+    "DDDD", 
+    "EEEEE", 
+    "FFFFFF", 
+    "GGGGGGG",
+    "HHHHHHHH",
+    "IIIIIIIII" 
+};
+
+
+SECStatus
+ssl3_KeyAndMacDeriveBypass(
+    ssl3CipherSpec *      pwSpec,
+    const unsigned char * cr,
+    const unsigned char * sr,
+    PRBool                isTLS,
+    PRBool                isExport)
+{
+    const ssl3BulkCipherDef *cipher_def = pwSpec->cipher_def;
+    unsigned char * key_block    = pwSpec->key_block;
+    unsigned char * key_block2   = NULL;
+    unsigned int    block_bytes  = 0;
+    unsigned int    block_needed = 0;
+    unsigned int    i;
+    unsigned int    keySize;            /* actual    size of cipher keys */
+    unsigned int    effKeySize;		/* effective size of cipher keys */
+    unsigned int    macSize;		/* size of MAC secret */
+    unsigned int    IVSize;		/* size of IV */
+    PRBool          explicitIV = PR_FALSE;
+    SECStatus       rv    = SECFailure;
+    SECStatus       status = SECSuccess;
+    PRBool          isFIPS = PR_FALSE;
+    PRBool          isTLS12 = pwSpec->version >= SSL_LIBRARY_VERSION_TLS_1_2;
+
+    SECItem         srcr;
+    SECItem         crsr;
+
+    unsigned char     srcrdata[SSL3_RANDOM_LENGTH * 2];
+    unsigned char     crsrdata[SSL3_RANDOM_LENGTH * 2];
+    PRUint64          md5buf[22];
+    PRUint64          shabuf[40];
+
+#define md5Ctx ((MD5Context *)md5buf)
+#define shaCtx ((SHA1Context *)shabuf)
+
+    static const SECItem zed  = { siBuffer, NULL, 0 };
+
+    if (pwSpec->msItem.data == NULL ||
+        pwSpec->msItem.len  != SSL3_MASTER_SECRET_LENGTH) {
+	PORT_SetError(SEC_ERROR_INVALID_ARGS);
+	return rv;
+    }
+
+    PRINT_BUF(100, (NULL, "Master Secret", pwSpec->msItem.data, 
+                                           pwSpec->msItem.len));
+
+    /* figure out how much is needed */
+    macSize    = pwSpec->mac_size;
+    keySize    = cipher_def->key_size;
+    effKeySize = cipher_def->secret_key_size;
+    IVSize     = cipher_def->iv_size;
+    if (keySize == 0) {
+	effKeySize = IVSize = 0; /* only MACing */
+    }
+    if (cipher_def->type == type_block &&
+	pwSpec->version >= SSL_LIBRARY_VERSION_TLS_1_1) {
+	/* Block ciphers in >= TLS 1.1 use a per-record, explicit IV. */
+	explicitIV = PR_TRUE;
+    }
+    block_needed =
+	2 * (macSize + effKeySize + ((!isExport && !explicitIV) * IVSize));
+
+    /*
+     * clear out our returned keys so we can recover on failure
+     */
+    pwSpec->client.write_key_item     = zed;
+    pwSpec->client.write_mac_key_item = zed;
+    pwSpec->server.write_key_item     = zed;
+    pwSpec->server.write_mac_key_item = zed;
+
+    /* initialize the server random, client random block */
+    srcr.type   = siBuffer;
+    srcr.data   = srcrdata;
+    srcr.len    = sizeof srcrdata;
+    PORT_Memcpy(srcrdata, sr, SSL3_RANDOM_LENGTH);
+    PORT_Memcpy(srcrdata + SSL3_RANDOM_LENGTH, cr, SSL3_RANDOM_LENGTH);
+
+    /* initialize the client random, server random block */
+    crsr.type   = siBuffer;
+    crsr.data   = crsrdata;
+    crsr.len    = sizeof crsrdata;
+    PORT_Memcpy(crsrdata, cr, SSL3_RANDOM_LENGTH);
+    PORT_Memcpy(crsrdata + SSL3_RANDOM_LENGTH, sr, SSL3_RANDOM_LENGTH);
+    PRINT_BUF(100, (NULL, "Key & MAC CRSR", crsr.data, crsr.len));
+
+    /*
+     * generate the key material:
+     */
+    if (isTLS) {
+	SECItem       keyblk;
+
+	keyblk.type = siBuffer;
+	keyblk.data = key_block;
+	keyblk.len  = block_needed;
+
+	if (isTLS12) {
+	    status = TLS_P_hash(HASH_AlgSHA256, &pwSpec->msItem,
+				"key expansion", &srcr, &keyblk, isFIPS);
+	} else {
+	    status = TLS_PRF(&pwSpec->msItem, "key expansion", &srcr, &keyblk,
+			     isFIPS);
+	}
+	if (status != SECSuccess) {
+	    goto key_and_mac_derive_fail;
+	}
+	block_bytes = keyblk.len;
+    } else {
+	/* key_block = 
+	 *     MD5(master_secret + SHA('A' + master_secret + 
+	 *                      ServerHello.random + ClientHello.random)) +
+	 *     MD5(master_secret + SHA('BB' + master_secret + 
+	 *                      ServerHello.random + ClientHello.random)) +
+	 *     MD5(master_secret + SHA('CCC' + master_secret + 
+	 *                      ServerHello.random + ClientHello.random)) +
+	 *     [...];
+	 */
+	unsigned int made = 0;
+	for (i = 0; made < block_needed && i < NUM_MIXERS; ++i) {
+	    unsigned int    outLen;
+	    unsigned char   sha_out[SHA1_LENGTH];
+
+	    SHA1_Begin(shaCtx);
+	    SHA1_Update(shaCtx, (unsigned char*)(mixers[i]), i+1);
+	    SHA1_Update(shaCtx, pwSpec->msItem.data, pwSpec->msItem.len);
+	    SHA1_Update(shaCtx, srcr.data, srcr.len);
+	    SHA1_End(shaCtx, sha_out, &outLen, SHA1_LENGTH);
+	    PORT_Assert(outLen == SHA1_LENGTH);
+
+	    MD5_Begin(md5Ctx);
+	    MD5_Update(md5Ctx, pwSpec->msItem.data, pwSpec->msItem.len);
+	    MD5_Update(md5Ctx, sha_out, outLen);
+	    MD5_End(md5Ctx, key_block + made, &outLen, MD5_LENGTH);
+	    PORT_Assert(outLen == MD5_LENGTH);
+	    made += MD5_LENGTH;
+	}
+	block_bytes = made;
+    }
+    PORT_Assert(block_bytes >= block_needed);
+    PORT_Assert(block_bytes <= sizeof pwSpec->key_block);
+    PRINT_BUF(100, (NULL, "key block", key_block, block_bytes));
+
+    /*
+     * Put the key material where it goes.
+     */
+    key_block2 = key_block + block_bytes;
+    i = 0;			/* now shows how much consumed */
+
+    /* 
+     * The key_block is partitioned as follows:
+     * client_write_MAC_secret[CipherSpec.hash_size]
+     */
+    buildSSLKey(&key_block[i],macSize, &pwSpec->client.write_mac_key_item, \
+                "Client Write MAC Secret");
+    i += macSize;
+
+    /* 
+     * server_write_MAC_secret[CipherSpec.hash_size]
+     */
+    buildSSLKey(&key_block[i],macSize, &pwSpec->server.write_mac_key_item, \
+                "Server Write MAC Secret");
+    i += macSize;
+
+    if (!keySize) {
+	/* only MACing */
+	buildSSLKey(NULL, 0, &pwSpec->client.write_key_item, \
+	            "Client Write Key (MAC only)");
+	buildSSLKey(NULL, 0, &pwSpec->server.write_key_item, \
+	            "Server Write Key (MAC only)");
+	buildSSLKey(NULL, 0, &pwSpec->client.write_iv_item, \
+	            "Client Write IV (MAC only)");
+	buildSSLKey(NULL, 0, &pwSpec->server.write_iv_item, \
+	            "Server Write IV (MAC only)");
+    } else if (!isExport) {
+	/* 
+	** Generate Domestic write keys and IVs.
+	** client_write_key[CipherSpec.key_material]
+	*/
+	buildSSLKey(&key_block[i], keySize, &pwSpec->client.write_key_item, \
+	            "Domestic Client Write Key");
+	i += keySize;
+
+	/* 
+	** server_write_key[CipherSpec.key_material]
+	*/
+	buildSSLKey(&key_block[i], keySize, &pwSpec->server.write_key_item, \
+	            "Domestic Server Write Key");
+	i += keySize;
+
+	if (IVSize > 0) {
+	    if (explicitIV) {
+		static unsigned char zero_block[32];
+		PORT_Assert(IVSize <= sizeof zero_block);
+		buildSSLKey(&zero_block[0], IVSize, \
+			    &pwSpec->client.write_iv_item, \
+			    "Domestic Client Write IV");
+		buildSSLKey(&zero_block[0], IVSize, \
+			    &pwSpec->server.write_iv_item, \
+			    "Domestic Server Write IV");
+	    } else {
+		/* 
+		** client_write_IV[CipherSpec.IV_size]
+		*/
+		buildSSLKey(&key_block[i], IVSize, \
+			    &pwSpec->client.write_iv_item, \
+			    "Domestic Client Write IV");
+		i += IVSize;
+
+		/* 
+		** server_write_IV[CipherSpec.IV_size]
+		*/
+		buildSSLKey(&key_block[i], IVSize, \
+			    &pwSpec->server.write_iv_item, \
+			    "Domestic Server Write IV");
+		i += IVSize;
+	    }
+	}
+	PORT_Assert(i <= block_bytes);
+    } else if (!isTLS) { 
+	/*
+	** Generate SSL3 Export write keys and IVs.
+	*/
+	unsigned int    outLen;
+
+	/*
+	** client_write_key[CipherSpec.key_material]
+	** final_client_write_key = MD5(client_write_key +
+	**                   ClientHello.random + ServerHello.random);
+	*/
+	MD5_Begin(md5Ctx);
+	MD5_Update(md5Ctx, &key_block[i], effKeySize);
+	MD5_Update(md5Ctx, crsr.data, crsr.len);
+	MD5_End(md5Ctx, key_block2, &outLen, MD5_LENGTH);
+	i += effKeySize;
+	buildSSLKey(key_block2, keySize, &pwSpec->client.write_key_item, \
+	            "SSL3 Export Client Write Key");
+	key_block2 += keySize;
+
+	/*
+	** server_write_key[CipherSpec.key_material]
+	** final_server_write_key = MD5(server_write_key +
+	**                    ServerHello.random + ClientHello.random);
+	*/
+	MD5_Begin(md5Ctx);
+	MD5_Update(md5Ctx, &key_block[i], effKeySize);
+	MD5_Update(md5Ctx, srcr.data, srcr.len);
+	MD5_End(md5Ctx, key_block2, &outLen, MD5_LENGTH);
+	i += effKeySize;
+	buildSSLKey(key_block2, keySize, &pwSpec->server.write_key_item, \
+	            "SSL3 Export Server Write Key");
+	key_block2 += keySize;
+	PORT_Assert(i <= block_bytes);
+
+	if (IVSize) {
+	    /*
+	    ** client_write_IV = 
+	    **	MD5(ClientHello.random + ServerHello.random);
+	    */
+	    MD5_Begin(md5Ctx);
+	    MD5_Update(md5Ctx, crsr.data, crsr.len);
+	    MD5_End(md5Ctx, key_block2, &outLen, MD5_LENGTH);
+	    buildSSLKey(key_block2, IVSize, &pwSpec->client.write_iv_item, \
+	                "SSL3 Export Client Write IV");
+	    key_block2 += IVSize;
+
+	    /*
+	    ** server_write_IV = 
+	    **	MD5(ServerHello.random + ClientHello.random);
+	    */
+	    MD5_Begin(md5Ctx);
+	    MD5_Update(md5Ctx, srcr.data, srcr.len);
+	    MD5_End(md5Ctx, key_block2, &outLen, MD5_LENGTH);
+	    buildSSLKey(key_block2, IVSize, &pwSpec->server.write_iv_item, \
+	                "SSL3 Export Server Write IV");
+	    key_block2 += IVSize;
+	}
+
+	PORT_Assert(key_block2 - key_block <= sizeof pwSpec->key_block);
+    } else {
+	/*
+	** Generate TLS Export write keys and IVs.
+	*/
+	SECItem       secret ;
+	SECItem       keyblk ;
+
+	secret.type = siBuffer;
+	keyblk.type = siBuffer;
+	/*
+	** client_write_key[CipherSpec.key_material]
+	** final_client_write_key = PRF(client_write_key, 
+	**                              "client write key",
+	**                              client_random + server_random);
+	*/
+	secret.data = &key_block[i];
+	secret.len  = effKeySize;
+	i          += effKeySize;
+	keyblk.data = key_block2;
+	keyblk.len  = keySize;
+	status = TLS_PRF(&secret, "client write key", &crsr, &keyblk, isFIPS);
+	if (status != SECSuccess) {
+	    goto key_and_mac_derive_fail;
+	}
+	buildSSLKey(key_block2, keySize, &pwSpec->client.write_key_item, \
+	            "TLS Export Client Write Key");
+	key_block2 += keySize;
+
+	/*
+	** server_write_key[CipherSpec.key_material]
+	** final_server_write_key = PRF(server_write_key,
+	**                              "server write key",
+	**                              client_random + server_random);
+	*/
+	secret.data = &key_block[i];
+	secret.len  = effKeySize;
+	i          += effKeySize;
+	keyblk.data = key_block2;
+	keyblk.len  = keySize;
+	status = TLS_PRF(&secret, "server write key", &crsr, &keyblk, isFIPS);
+	if (status != SECSuccess) {
+	    goto key_and_mac_derive_fail;
+	}
+	buildSSLKey(key_block2, keySize, &pwSpec->server.write_key_item, \
+	            "TLS Export Server Write Key");
+	key_block2 += keySize;
+
+	/*
+	** iv_block = PRF("", "IV block", client_random + server_random);
+	** client_write_IV[SecurityParameters.IV_size]
+	** server_write_IV[SecurityParameters.IV_size]
+	*/
+	if (IVSize) {
+	    secret.data = NULL;
+	    secret.len  = 0;
+	    keyblk.data = key_block2;
+	    keyblk.len  = 2 * IVSize;
+	    status = TLS_PRF(&secret, "IV block", &crsr, &keyblk, isFIPS);
+	    if (status != SECSuccess) {
+		goto key_and_mac_derive_fail;
+	    }
+	    buildSSLKey(key_block2,          IVSize, \
+	                &pwSpec->client.write_iv_item, \
+			"TLS Export Client Write IV");
+	    buildSSLKey(key_block2 + IVSize, IVSize, \
+	                &pwSpec->server.write_iv_item, \
+			"TLS Export Server Write IV");
+	    key_block2 += 2 * IVSize;
+	}
+	PORT_Assert(key_block2 - key_block <= sizeof pwSpec->key_block);
+    }
+    rv = SECSuccess;
+
+key_and_mac_derive_fail:
+
+    MD5_DestroyContext(md5Ctx, PR_FALSE);
+    SHA1_DestroyContext(shaCtx, PR_FALSE);
+
+    if (rv != SECSuccess) {
+	PORT_SetError(SSL_ERROR_SESSION_KEY_GEN_FAILURE);
+    }
+
+    return rv;
+}
+
+
+/* derive the Master Secret from the PMS */
+/* Presently, this is only done wtih RSA PMS, and only on the server side,
+ * so isRSA is always true. 
+ */
+SECStatus
+ssl3_MasterKeyDeriveBypass( 
+    ssl3CipherSpec *      pwSpec,
+    const unsigned char * cr,
+    const unsigned char * sr,
+    const SECItem *       pms,
+    PRBool                isTLS,
+    PRBool                isRSA)
+{
+    unsigned char * key_block    = pwSpec->key_block;
+    SECStatus       rv    = SECSuccess;
+    PRBool          isFIPS = PR_FALSE;
+    PRBool          isTLS12 = pwSpec->version >= SSL_LIBRARY_VERSION_TLS_1_2;
+
+    SECItem         crsr;
+
+    unsigned char     crsrdata[SSL3_RANDOM_LENGTH * 2];
+    PRUint64          md5buf[22];
+    PRUint64          shabuf[40];
+
+#define md5Ctx ((MD5Context *)md5buf)
+#define shaCtx ((SHA1Context *)shabuf)
+
+    /* first do the consistancy checks */
+    if (isRSA) { 
+	PORT_Assert(pms->len == SSL3_RSA_PMS_LENGTH);
+	if (pms->len != SSL3_RSA_PMS_LENGTH) {
+	    PORT_SetError(SEC_ERROR_INVALID_ARGS);
+	    return SECFailure;
+	}
+	/* caller must test PMS version for rollback */
+    }
+
+    /* initialize the client random, server random block */
+    crsr.type   = siBuffer;
+    crsr.data   = crsrdata;
+    crsr.len    = sizeof crsrdata;
+    PORT_Memcpy(crsrdata, cr, SSL3_RANDOM_LENGTH);
+    PORT_Memcpy(crsrdata + SSL3_RANDOM_LENGTH, sr, SSL3_RANDOM_LENGTH);
+    PRINT_BUF(100, (NULL, "Master Secret CRSR", crsr.data, crsr.len));
+
+    /* finally do the key gen */
+    if (isTLS) {
+	SECItem master = { siBuffer, NULL, 0 };
+
+	master.data = key_block;
+	master.len = SSL3_MASTER_SECRET_LENGTH;
+
+	if (isTLS12) {
+	    rv = TLS_P_hash(HASH_AlgSHA256, pms, "master secret", &crsr,
+			    &master, isFIPS);
+	} else {
+	    rv = TLS_PRF(pms, "master secret", &crsr, &master, isFIPS);
+	}
+	if (rv != SECSuccess) {
+	    PORT_SetError(SSL_ERROR_SESSION_KEY_GEN_FAILURE);
+	}
+    } else {
+	int i;
+	unsigned int made = 0;
+	for (i = 0; i < 3; i++) {
+	    unsigned int    outLen;
+	    unsigned char   sha_out[SHA1_LENGTH];
+
+	    SHA1_Begin(shaCtx);
+	    SHA1_Update(shaCtx, (unsigned char*) mixers[i], i+1);
+	    SHA1_Update(shaCtx, pms->data, pms->len);
+	    SHA1_Update(shaCtx, crsr.data, crsr.len);
+	    SHA1_End(shaCtx, sha_out, &outLen, SHA1_LENGTH);
+	    PORT_Assert(outLen == SHA1_LENGTH);
+
+	    MD5_Begin(md5Ctx);
+	    MD5_Update(md5Ctx, pms->data, pms->len);
+	    MD5_Update(md5Ctx, sha_out, outLen);
+	    MD5_End(md5Ctx, key_block + made, &outLen, MD5_LENGTH);
+	    PORT_Assert(outLen == MD5_LENGTH);
+	    made += outLen;
+	}
+    }
+
+    /* store the results */
+    PORT_Memcpy(pwSpec->raw_master_secret, key_block, 
+		SSL3_MASTER_SECRET_LENGTH);
+    pwSpec->msItem.data = pwSpec->raw_master_secret;
+    pwSpec->msItem.len  = SSL3_MASTER_SECRET_LENGTH;
+    PRINT_BUF(100, (NULL, "Master Secret", pwSpec->msItem.data, 
+                                           pwSpec->msItem.len));
+
+    return rv;
+}
+
+static SECStatus
+ssl_canExtractMS(PK11SymKey *pms, PRBool isTLS, PRBool isDH, PRBool *pcbp)
+{   SECStatus	      rv;
+    PK11SymKey *    ms = NULL;
+    SECItem         params = {siBuffer, NULL, 0};
+    CK_SSL3_MASTER_KEY_DERIVE_PARAMS master_params;
+    unsigned char   rand[SSL3_RANDOM_LENGTH];
+    CK_VERSION      pms_version;
+    CK_MECHANISM_TYPE master_derive;
+    CK_MECHANISM_TYPE key_derive;
+    CK_FLAGS          keyFlags;
+    
+    if (pms == NULL)
+	return(SECFailure);
+
+    PORT_Memset(rand, 0, SSL3_RANDOM_LENGTH);
+
+    if (isTLS) {
+	if(isDH) master_derive = CKM_TLS_MASTER_KEY_DERIVE_DH;
+	else master_derive = CKM_TLS_MASTER_KEY_DERIVE;
+	key_derive    = CKM_TLS_KEY_AND_MAC_DERIVE;
+	keyFlags      = CKF_SIGN | CKF_VERIFY;
+    } else {
+	if (isDH) master_derive = CKM_SSL3_MASTER_KEY_DERIVE_DH;
+	else master_derive = CKM_SSL3_MASTER_KEY_DERIVE;
+	key_derive    = CKM_SSL3_KEY_AND_MAC_DERIVE;
+	keyFlags      = 0;
+    }
+
+    master_params.pVersion                     = &pms_version;
+    master_params.RandomInfo.pClientRandom     = rand;
+    master_params.RandomInfo.ulClientRandomLen = SSL3_RANDOM_LENGTH;
+    master_params.RandomInfo.pServerRandom     = rand;
+    master_params.RandomInfo.ulServerRandomLen = SSL3_RANDOM_LENGTH;
+
+    params.data = (unsigned char *) &master_params;
+    params.len  = sizeof master_params;
+
+    ms = PK11_DeriveWithFlags(pms, master_derive, &params, key_derive,
+			      CKA_DERIVE, 0, keyFlags);
+    if (ms == NULL)
+	return(SECFailure);
+
+    rv = PK11_ExtractKeyValue(ms);
+    *pcbp = (rv == SECSuccess);
+    PK11_FreeSymKey(ms);
+    
+    return(rv);
+
+}
+#endif  /* !NO_PKCS11_BYPASS */
+
+/* Check the key exchange algorithm for each cipher in the list to see if
+ * a master secret key can be extracted. If the KEA will use keys from the 
+ * specified cert make sure the extract operation is attempted from the slot
+ * where the private key resides.
+ * If MS can be extracted for all ciphers, (*pcanbypass) is set to TRUE and
+ * SECSuccess is returned. In all other cases but one (*pcanbypass) is
+ * set to FALSE and SECFailure is returned.
+ * In that last case Derive() has been called successfully but the MS is null, 
+ * CanBypass sets (*pcanbypass) to FALSE and returns SECSuccess indicating the
+ * arguments were all valid but the slot cannot be bypassed.
+ */
+
+/* XXX Add SSL_CBP_TLS1_1 and test it in protocolmask when setting isTLS. */
+
+SECStatus 
+SSL_CanBypass(CERTCertificate *cert, SECKEYPrivateKey *srvPrivkey,
+	      PRUint32 protocolmask, PRUint16 *ciphersuites, int nsuites,
+              PRBool *pcanbypass, void *pwArg)
+{
+#ifdef NO_PKCS11_BYPASS
+    if (!pcanbypass) {
+        PORT_SetError(SEC_ERROR_INVALID_ARGS);
+        return SECFailure;
+    }
+    *pcanbypass = PR_FALSE;
+    return SECSuccess;
+#else
+    SECStatus	      rv;
+    int		      i;
+    PRUint16	      suite;
+    PK11SymKey *      pms = NULL;
+    SECKEYPublicKey * srvPubkey = NULL;
+    KeyType	      privKeytype;
+    PK11SlotInfo *    slot = NULL;
+    SECItem           param;
+    CK_VERSION 	      version;
+    CK_MECHANISM_TYPE mechanism_array[2];
+    SECItem           enc_pms = {siBuffer, NULL, 0};
+    PRBool	      isTLS = PR_FALSE;
+    SSLCipherSuiteInfo csdef;
+    PRBool	      testrsa = PR_FALSE;
+    PRBool	      testrsa_export = PR_FALSE;
+    PRBool	      testecdh = PR_FALSE;
+    PRBool	      testecdhe = PR_FALSE;
+#ifdef NSS_ENABLE_ECC
+    SECKEYECParams ecParams = { siBuffer, NULL, 0 };
+#endif
+
+    if (!cert || !srvPrivkey || !ciphersuites || !pcanbypass) {
+	PORT_SetError(SEC_ERROR_INVALID_ARGS);
+        return SECFailure;
+    }
+    
+    srvPubkey = CERT_ExtractPublicKey(cert);
+    if (!srvPubkey)
+        return SECFailure;
+	
+    *pcanbypass = PR_TRUE;
+    rv = SECFailure;
+    
+    /* determine which KEAs to test */
+    /* 0 (SSL_NULL_WITH_NULL_NULL) is used as a list terminator because
+     * SSL3 and TLS specs forbid negotiating that cipher suite number.
+     */
+    for (i=0; i < nsuites && (suite = *ciphersuites++) != 0; i++) {
+	/* skip SSL2 cipher suites and ones NSS doesn't support */
+	if (SSL_GetCipherSuiteInfo(suite, &csdef, sizeof(csdef)) != SECSuccess
+	    || SSL_IS_SSL2_CIPHER(suite) )
+	    continue;
+	switch (csdef.keaType) {
+	case ssl_kea_rsa:
+	    switch (csdef.cipherSuite) {
+	    case TLS_RSA_EXPORT1024_WITH_RC4_56_SHA:
+	    case TLS_RSA_EXPORT1024_WITH_DES_CBC_SHA:
+	    case SSL_RSA_EXPORT_WITH_RC4_40_MD5:
+	    case SSL_RSA_EXPORT_WITH_RC2_CBC_40_MD5:
+		testrsa_export = PR_TRUE;
+	    }
+	    if (!testrsa_export)
+		testrsa = PR_TRUE;
+	    break;
+	case ssl_kea_ecdh:
+	    if (strcmp(csdef.keaTypeName, "ECDHE") == 0) /* ephemeral? */
+		testecdhe = PR_TRUE;
+	    else
+		testecdh = PR_TRUE;
+	    break;
+	case ssl_kea_dh:
+	    /* this is actually DHE */
+	default:
+	    continue;
+	}
+    }
+    
+    /* For each protocol try to derive and extract an MS.
+     * Failure of function any function except MS extract means
+     * continue with the next cipher test. Stop testing when the list is
+     * exhausted or when the first MS extract--not derive--fails.
+     */
+    privKeytype = SECKEY_GetPrivateKeyType(srvPrivkey);
+    protocolmask &= SSL_CBP_SSL3|SSL_CBP_TLS1_0;
+    while (protocolmask) {
+	if (protocolmask & SSL_CBP_SSL3) {
+	    isTLS = PR_FALSE;
+	    protocolmask ^= SSL_CBP_SSL3;
+	} else {
+	    isTLS = PR_TRUE;
+	    protocolmask ^= SSL_CBP_TLS1_0;
+	}
+
+	if (privKeytype == rsaKey && testrsa_export) {
+	    if (PK11_GetPrivateModulusLen(srvPrivkey) > EXPORT_RSA_KEY_LENGTH) {
+		*pcanbypass = PR_FALSE;
+		rv = SECSuccess;
+		break;
+	    } else
+		testrsa = PR_TRUE;
+	}
+	for (; privKeytype == rsaKey && testrsa; ) {
+	    /* TLS_RSA */
+	    unsigned char     rsaPmsBuf[SSL3_RSA_PMS_LENGTH];
+	    unsigned int      outLen = 0;
+	    CK_MECHANISM_TYPE target;
+	    SECStatus	      irv;
+	    
+	    mechanism_array[0] = CKM_SSL3_PRE_MASTER_KEY_GEN;
+	    mechanism_array[1] = CKM_RSA_PKCS;
+
+	    slot = PK11_GetBestSlotMultiple(mechanism_array, 2, pwArg);
+	    if (slot == NULL) {
+		PORT_SetError(SSL_ERROR_TOKEN_SLOT_NOT_FOUND);
+		break;
+	    }
+
+	    /* Generate the pre-master secret ...  (client side) */
+	    version.major = 3 /*MSB(clientHelloVersion)*/;
+	    version.minor = 0 /*LSB(clientHelloVersion)*/;
+	    param.data = (unsigned char *)&version;
+	    param.len  = sizeof version;
+	    pms = PK11_KeyGen(slot, CKM_SSL3_PRE_MASTER_KEY_GEN, &param, 0, pwArg);
+	    PK11_FreeSlot(slot);
+	    if (!pms)
+		break;
+	    /* now wrap it */
+	    enc_pms.len  = SECKEY_PublicKeyStrength(srvPubkey);
+	    enc_pms.data = (unsigned char*)PORT_Alloc(enc_pms.len);
+	    if (enc_pms.data == NULL) {
+	        PORT_SetError(PR_OUT_OF_MEMORY_ERROR);
+	        break;
+	    }
+	    irv = PK11_PubWrapSymKey(CKM_RSA_PKCS, srvPubkey, pms, &enc_pms);
+	    if (irv != SECSuccess) 
+		break;
+	    PK11_FreeSymKey(pms);
+	    pms = NULL;
+	    /* now do the server side--check the triple bypass first */
+	    rv = PK11_PrivDecryptPKCS1(srvPrivkey, rsaPmsBuf, &outLen,
+				       sizeof rsaPmsBuf,
+				       (unsigned char *)enc_pms.data,
+				       enc_pms.len);
+	    /* if decrypt worked we're done with the RSA test */
+	    if (rv == SECSuccess) {
+		*pcanbypass = PR_TRUE;
+		break;
+	    }
+	    /* check for fallback to double bypass */
+	    target = isTLS ? CKM_TLS_MASTER_KEY_DERIVE
+			: CKM_SSL3_MASTER_KEY_DERIVE;
+	    pms = PK11_PubUnwrapSymKey(srvPrivkey, &enc_pms,
+				       target, CKA_DERIVE, 0);
+	    rv = ssl_canExtractMS(pms, isTLS, PR_FALSE, pcanbypass);
+	    if (rv == SECSuccess && *pcanbypass == PR_FALSE)
+		goto done;
+	    break;
+	}
+
+	/* Check for NULL to avoid double free. 
+	 * SECItem_FreeItem sets data NULL in secitem.c#265 
+	 */
+	if (enc_pms.data != NULL) {
+	    SECITEM_FreeItem(&enc_pms, PR_FALSE);
+        }
+#ifdef NSS_ENABLE_ECC
+	for (; (privKeytype == ecKey && ( testecdh || testecdhe)) ||
+	       (privKeytype == rsaKey && testecdhe); ) {
+	    CK_MECHANISM_TYPE target;
+	    SECKEYPublicKey  *keapub = NULL;
+	    SECKEYPrivateKey *keapriv;
+	    SECKEYPublicKey  *cpub = NULL; /* client's ephemeral ECDH keys */
+	    SECKEYPrivateKey *cpriv = NULL;
+	    SECKEYECParams   *pecParams = NULL;
+
+	    if (privKeytype == ecKey && testecdhe) {
+		/* TLS_ECDHE_ECDSA */
+		pecParams = &srvPubkey->u.ec.DEREncodedParams;
+	    } else if (privKeytype == rsaKey && testecdhe) {
+		/* TLS_ECDHE_RSA */
+		ECName       ec_curve;
+		int		 serverKeyStrengthInBits;
+		int		 signatureKeyStrength;
+		int		 requiredECCbits;
+
+		/* find a curve of equivalent strength to the RSA key's */
+		requiredECCbits = PK11_GetPrivateModulusLen(srvPrivkey);
+		if (requiredECCbits < 0)
+		    break;
+		requiredECCbits *= BPB;
+		serverKeyStrengthInBits = srvPubkey->u.rsa.modulus.len;
+		if (srvPubkey->u.rsa.modulus.data[0] == 0) {
+		    serverKeyStrengthInBits--;
+		}
+		/* convert to strength in bits */
+		serverKeyStrengthInBits *= BPB;
+
+		signatureKeyStrength =
+		    SSL_RSASTRENGTH_TO_ECSTRENGTH(serverKeyStrengthInBits);
+
+		if ( requiredECCbits > signatureKeyStrength ) 
+		     requiredECCbits = signatureKeyStrength;
+
+		ec_curve =
+		    ssl3_GetCurveWithECKeyStrength(
+					ssl3_GetSupportedECCurveMask(NULL),
+				  	requiredECCbits);
+		rv = ssl3_ECName2Params(NULL, ec_curve, &ecParams);
+		if (rv == SECFailure) {
+		    break;
+		}
+		pecParams = &ecParams;
+	    }
+
+	    if (testecdhe) {
+		/* generate server's ephemeral keys */
+		keapriv = SECKEY_CreateECPrivateKey(pecParams, &keapub, NULL); 
+		if (!keapriv || !keapub) {
+		    if (keapriv)
+			SECKEY_DestroyPrivateKey(keapriv);
+		    if (keapub)
+			SECKEY_DestroyPublicKey(keapub);
+		    PORT_SetError(SEC_ERROR_KEYGEN_FAIL);
+		    rv = SECFailure;
+		    break;
+		}
+	    } else {
+		/* TLS_ECDH_ECDSA */
+		keapub = srvPubkey;
+		keapriv = srvPrivkey;
+		pecParams = &srvPubkey->u.ec.DEREncodedParams;
+	    }
+
+	    /* perform client side ops */
+	    /* generate a pair of ephemeral keys using server's parms */
+	    cpriv = SECKEY_CreateECPrivateKey(pecParams, &cpub, NULL);
+	    if (!cpriv || !cpub) {
+		if (testecdhe) {
+		    SECKEY_DestroyPrivateKey(keapriv);
+		    SECKEY_DestroyPublicKey(keapub);
+		}
+		PORT_SetError(SEC_ERROR_KEYGEN_FAIL);
+		rv = SECFailure;
+		break;
+	    }
+	    /* now do the server side */
+	    /* determine the PMS using client's public value */
+	    target = isTLS ? CKM_TLS_MASTER_KEY_DERIVE_DH
+			   : CKM_SSL3_MASTER_KEY_DERIVE_DH;
+	    pms = PK11_PubDeriveWithKDF(keapriv, cpub, PR_FALSE, NULL, NULL,
+				    CKM_ECDH1_DERIVE,
+				    target,
+				    CKA_DERIVE, 0, CKD_NULL, NULL, NULL);
+	    rv = ssl_canExtractMS(pms, isTLS, PR_TRUE, pcanbypass);
+	    SECKEY_DestroyPrivateKey(cpriv);
+	    SECKEY_DestroyPublicKey(cpub);
+	    if (testecdhe) {
+		SECKEY_DestroyPrivateKey(keapriv);
+		SECKEY_DestroyPublicKey(keapub);
+	    }
+	    if (rv == SECSuccess && *pcanbypass == PR_FALSE)
+		goto done;
+	    break;
+	}
+	/* Check for NULL to avoid double free. */
+	if (ecParams.data != NULL) {
+	    PORT_Free(ecParams.data);
+	    ecParams.data = NULL;
+	}
+#endif /* NSS_ENABLE_ECC */
+	if (pms)
+	    PK11_FreeSymKey(pms);
+    }
+
+    /* *pcanbypass has been set */
+    rv = SECSuccess;
+    
+  done:
+    if (pms)
+	PK11_FreeSymKey(pms);
+
+    /* Check for NULL to avoid double free. 
+     * SECItem_FreeItem sets data NULL in secitem.c#265 
+     */
+    if (enc_pms.data != NULL) {
+    	SECITEM_FreeItem(&enc_pms, PR_FALSE);
+    }
+#ifdef NSS_ENABLE_ECC
+    if (ecParams.data != NULL) {
+        PORT_Free(ecParams.data);
+        ecParams.data = NULL;
+    }
+#endif /* NSS_ENABLE_ECC */
+
+    if (srvPubkey) {
+    	SECKEY_DestroyPublicKey(srvPubkey);
+	srvPubkey = NULL;
+    }
+
+
+    return rv;
+#endif /* NO_PKCS11_BYPASS */
+}
+