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Unified Diff: net/third_party/nss/ssl/derive.c

Issue 1882433002: Removing NSS files and USE_OPENSSL flag (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Rebase. Created 4 years, 8 months ago
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Index: net/third_party/nss/ssl/derive.c
diff --git a/net/third_party/nss/ssl/derive.c b/net/third_party/nss/ssl/derive.c
deleted file mode 100644
index 026dbd2e029c0d70593a3eb06a885a47ae432e7c..0000000000000000000000000000000000000000
--- a/net/third_party/nss/ssl/derive.c
+++ /dev/null
@@ -1,896 +0,0 @@
-/*
- * 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_MasterSecretDeriveBypass(
- 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;
-#ifndef NSS_DISABLE_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 (TLS_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 TLS_RSA_EXPORT_WITH_RC4_40_MD5:
- case TLS_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);
- }
-#ifndef NSS_DISABLE_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_DISABLE_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);
- }
-#ifndef NSS_DISABLE_ECC
- if (ecParams.data != NULL) {
- PORT_Free(ecParams.data);
- ecParams.data = NULL;
- }
-#endif /* NSS_DISABLE_ECC */
-
- if (srvPubkey) {
- SECKEY_DestroyPublicKey(srvPubkey);
- srvPubkey = NULL;
- }
-
- return rv;
-#endif /* NO_PKCS11_BYPASS */
-}
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