forked from wolfSSL/wolfssl
internal.c: refactoring SendServerKeyExchange to reduce stack usage:
--- variable md5 moved to the heap (sizeof(Md5) saved) --- variable sha moved to the heap (sizeof(Sha) saved) --- variable hash moved to the heap (36 bytes saved) --- variable sha256 moved to the heap (sizeof(Sha256) saved) --- variable hash256 moved to the heap (32 bytes saved) --- variable sha384 moved to the heap (sizeof(sha384) saved) --- variable hash256 moved to the heap (48 bytes saved) --- variable encodedSig moved to the heap (512 bytes saved) *** the variables above appear twice in the code
This commit is contained in:
Moisés Guimarães
410
src/internal.c
410
src/internal.c
@@ -11405,84 +11405,140 @@ int DoSessionTicket(CYASSL* ssl,
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/* do signature */
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{
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#ifndef NO_OLD_TLS
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Md5 md5;
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Sha sha;
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#endif
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#ifndef NO_OLD_TLS
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#ifdef CYASSL_SMALL_STACK
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Md5* md5 = NULL;
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Sha* sha = NULL;
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#else
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Md5 md5[1];
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Sha sha[1];
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#endif
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#endif
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#ifdef CYASSL_SMALL_STACK
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byte* hash = NULL;
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#else
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byte hash[FINISHED_SZ];
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#ifndef NO_SHA256
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Sha256 sha256;
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byte hash256[SHA256_DIGEST_SIZE];
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#endif
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#ifdef CYASSL_SHA384
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Sha384 sha384;
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byte hash384[SHA384_DIGEST_SIZE];
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#endif
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#endif
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#ifndef NO_SHA256
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#ifdef CYASSL_SMALL_STACK
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Sha256* sha256 = NULL;
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byte* hash256 = NULL;
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#else
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Sha256 sha256[1];
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byte hash256[SHA256_DIGEST_SIZE];
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#endif
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#endif
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#ifdef CYASSL_SHA384
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#ifdef CYASSL_SMALL_STACK
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Sha384* sha384 = NULL;
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byte* hash384 = NULL;
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#else
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Sha384 sha384[1];
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byte hash384[SHA384_DIGEST_SIZE];
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#endif
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#endif
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#ifndef NO_OLD_TLS
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#ifdef CYASSL_SMALL_STACK
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hash = (byte*)XMALLOC(FINISHED_SZ, NULL,
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DYNAMIC_TYPE_TMP_BUFFER);
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if (hash == NULL)
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ERROR_OUT(MEMORY_E, done_a);
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#endif
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#ifndef NO_OLD_TLS
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/* md5 */
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InitMd5(&md5);
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Md5Update(&md5, ssl->arrays->clientRandom, RAN_LEN);
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Md5Update(&md5, ssl->arrays->serverRandom, RAN_LEN);
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Md5Update(&md5, output + preSigIdx, preSigSz);
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Md5Final(&md5, hash);
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#ifdef CYASSL_SMALL_STACK
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md5 = (Md5*)XMALLOC(sizeof(Md5), NULL, DYNAMIC_TYPE_TMP_BUFFER);
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if (md5 == NULL)
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ERROR_OUT(MEMORY_E, done_a2);
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#endif
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InitMd5(md5);
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Md5Update(md5, ssl->arrays->clientRandom, RAN_LEN);
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Md5Update(md5, ssl->arrays->serverRandom, RAN_LEN);
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Md5Update(md5, output + preSigIdx, preSigSz);
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Md5Final(md5, hash);
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/* sha */
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ret = InitSha(&sha);
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#ifdef CYASSL_SMALL_STACK
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sha = (Sha*)XMALLOC(sizeof(Sha), NULL, DYNAMIC_TYPE_TMP_BUFFER);
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if (sha == NULL)
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ERROR_OUT(MEMORY_E, done_a2);
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#endif
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ret = InitSha(sha);
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if (ret != 0)
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goto done_a;
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ShaUpdate(&sha, ssl->arrays->clientRandom, RAN_LEN);
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ShaUpdate(&sha, ssl->arrays->serverRandom, RAN_LEN);
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ShaUpdate(&sha, output + preSigIdx, preSigSz);
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ShaFinal(&sha, &hash[MD5_DIGEST_SIZE]);
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#endif
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goto done_a2;
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ShaUpdate(sha, ssl->arrays->clientRandom, RAN_LEN);
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ShaUpdate(sha, ssl->arrays->serverRandom, RAN_LEN);
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ShaUpdate(sha, output + preSigIdx, preSigSz);
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ShaFinal(sha, &hash[MD5_DIGEST_SIZE]);
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#endif
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#ifndef NO_SHA256
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ret = InitSha256(&sha256);
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if (ret != 0)
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goto done_a;
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ret = Sha256Update(&sha256, ssl->arrays->clientRandom, RAN_LEN);
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if (ret != 0)
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goto done_a;
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ret = Sha256Update(&sha256, ssl->arrays->serverRandom, RAN_LEN);
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if (ret != 0)
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goto done_a;
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ret = Sha256Update(&sha256, output + preSigIdx, preSigSz);
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if (ret != 0)
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goto done_a;
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ret = Sha256Final(&sha256, hash256);
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if (ret != 0)
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goto done_a;
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#endif
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#ifndef NO_SHA256
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#ifdef CYASSL_SMALL_STACK
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sha256 = (Sha256*)XMALLOC(sizeof(Sha256), NULL,
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DYNAMIC_TYPE_TMP_BUFFER);
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hash256 = (byte*)XMALLOC(SHA256_DIGEST_SIZE, NULL,
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DYNAMIC_TYPE_TMP_BUFFER);
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if (sha256 == NULL || hash256 == NULL)
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ERROR_OUT(MEMORY_E, done_a2);
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#endif
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#ifdef CYASSL_SHA384
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ret = InitSha384(&sha384);
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if (ret != 0)
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goto done_a;
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ret = Sha384Update(&sha384, ssl->arrays->clientRandom, RAN_LEN);
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if (ret != 0)
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goto done_a;
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ret = Sha384Update(&sha384, ssl->arrays->serverRandom, RAN_LEN);
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if (ret != 0)
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goto done_a;
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ret = Sha384Update(&sha384, output + preSigIdx, preSigSz);
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if (ret != 0)
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goto done_a;
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ret = Sha384Final(&sha384, hash384);
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if (ret != 0)
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goto done_a;
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#endif
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#ifndef NO_RSA
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if (!(ret = InitSha256(sha256))
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&& !(ret = Sha256Update(sha256, ssl->arrays->clientRandom,
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RAN_LEN))
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&& !(ret = Sha256Update(sha256, ssl->arrays->serverRandom,
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RAN_LEN))
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&& !(ret = Sha256Update(sha256, output + preSigIdx, preSigSz)))
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ret = Sha256Final(sha256, hash256);
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if (ret != 0)
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goto done_a2;
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#endif
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#ifdef CYASSL_SHA384
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#ifdef CYASSL_SMALL_STACK
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sha384 = (Sha384*)XMALLOC(sizeof(Sha384), NULL,
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DYNAMIC_TYPE_TMP_BUFFER);
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hash384 = (byte*)XMALLOC(SHA384_DIGEST_SIZE, NULL,
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DYNAMIC_TYPE_TMP_BUFFER);
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if (sha384 == NULL || hash384 == NULL)
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ERROR_OUT(MEMORY_E, done_a2);
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#endif
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if (!(ret = InitSha384(sha384))
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&& !(ret = Sha384Update(sha384, ssl->arrays->clientRandom,
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RAN_LEN))
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&& !(ret = Sha384Update(sha384, ssl->arrays->serverRandom,
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RAN_LEN))
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&& !(ret = Sha384Update(sha384, output + preSigIdx, preSigSz)))
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ret = Sha384Final(sha384, hash384);
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if (ret != 0)
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goto done_a2;
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#endif
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#ifndef NO_RSA
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if (ssl->suites->sigAlgo == rsa_sa_algo) {
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byte* signBuffer = hash;
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word32 signSz = sizeof(hash);
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byte encodedSig[MAX_ENCODED_SIG_SZ];
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word32 signSz = FINISHED_SZ;
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byte doUserRsa = 0;
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#ifdef CYASSL_SMALL_STACK
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byte* encodedSig = NULL;
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#else
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byte encodedSig[MAX_ENCODED_SIG_SZ];
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#endif
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#ifdef HAVE_PK_CALLBACKS
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if (ssl->ctx->RsaSignCb)
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doUserRsa = 1;
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#endif /*HAVE_PK_CALLBACKS */
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#endif
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#ifdef CYASSL_SMALL_STACK
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encodedSig = (byte*)XMALLOC(MAX_ENCODED_SIG_SZ, NULL,
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DYNAMIC_TYPE_TMP_BUFFER);
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if (encodedSig == NULL)
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ERROR_OUT(MEMORY_E, done_a2);
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#endif
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if (IsAtLeastTLSv1_2(ssl)) {
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byte* digest = &hash[MD5_DIGEST_SIZE];
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@@ -11528,8 +11584,13 @@ int DoSessionTicket(CYASSL* ssl,
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FreeRsaKey(&rsaKey);
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ecc_free(&dsaKey);
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#ifdef CYASSL_SMALL_STACK
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XFREE(encodedSig, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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#endif
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if (ret < 0)
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goto done_a;
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goto done_a2;
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} else
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#endif
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@@ -11587,8 +11648,9 @@ int DoSessionTicket(CYASSL* ssl,
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FreeRsaKey(&rsaKey);
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#endif
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ecc_free(&dsaKey);
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if (ret < 0)
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goto done_a;
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goto done_a2;
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/* Now that we know the real sig size, write it. */
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c16toa((word16)sz, output + idx);
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@@ -11597,6 +11659,26 @@ int DoSessionTicket(CYASSL* ssl,
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length += sz - sigSz;
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sendSz += sz - sigSz;
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}
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done_a2:
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#ifdef CYASSL_SMALL_STACK
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#ifndef NO_OLD_TLS
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XFREE(md5, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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XFREE(sha, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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#endif
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XFREE(hash, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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#ifndef NO_SHA256
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XFREE(sha256, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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XFREE(hash256, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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#endif
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#ifdef CYASSL_SHA384
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XFREE(sha384, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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XFREE(hash384, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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#endif
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#endif
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if (ret < 0)
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goto done_a;
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}
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AddHeaders(output, length, server_key_exchange, ssl);
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@@ -11765,78 +11847,130 @@ int DoSessionTicket(CYASSL* ssl,
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/* do signature */
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{
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#ifndef NO_OLD_TLS
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Md5 md5;
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Sha sha;
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#endif
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#ifndef NO_OLD_TLS
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#ifdef CYASSL_SMALL_STACK
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Md5* md5 = NULL;
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Sha* sha = NULL;
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#else
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Md5 md5[1];
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Sha sha[1];
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#endif
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#endif
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#ifdef CYASSL_SMALL_STACK
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byte* hash = NULL;
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#else
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byte hash[FINISHED_SZ];
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#ifndef NO_SHA256
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Sha256 sha256;
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byte hash256[SHA256_DIGEST_SIZE];
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#endif
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#ifdef CYASSL_SHA384
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Sha384 sha384;
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byte hash384[SHA384_DIGEST_SIZE];
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#endif
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#endif
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#ifndef NO_SHA256
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#ifdef CYASSL_SMALL_STACK
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Sha256* sha256 = NULL;
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byte* hash256 = NULL;
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#else
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Sha256 sha256[1];
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byte hash256[SHA256_DIGEST_SIZE];
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#endif
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#endif
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#ifdef CYASSL_SHA384
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#ifdef CYASSL_SMALL_STACK
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Sha384* sha384 = NULL;
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byte* hash384 = NULL;
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#else
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Sha384 sha384[1];
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byte hash384[SHA384_DIGEST_SIZE];
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#endif
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#endif
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#ifndef NO_OLD_TLS
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#ifdef CYASSL_SMALL_STACK
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hash = (byte*)XMALLOC(FINISHED_SZ, NULL,
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DYNAMIC_TYPE_TMP_BUFFER);
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if (hash == NULL)
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return MEMORY_E; /* No heap commitment before this point,
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from now on, the resources are freed
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at done_b. */
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#endif
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#ifndef NO_OLD_TLS
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/* md5 */
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InitMd5(&md5);
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Md5Update(&md5, ssl->arrays->clientRandom, RAN_LEN);
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Md5Update(&md5, ssl->arrays->serverRandom, RAN_LEN);
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Md5Update(&md5, output + preSigIdx, preSigSz);
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Md5Final(&md5, hash);
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#ifdef CYASSL_SMALL_STACK
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md5 = (Md5*)XMALLOC(sizeof(Md5), NULL, DYNAMIC_TYPE_TMP_BUFFER);
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if (md5 == NULL)
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ERROR_OUT(MEMORY_E, done_b);
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#endif
|
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InitMd5(md5);
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Md5Update(md5, ssl->arrays->clientRandom, RAN_LEN);
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Md5Update(md5, ssl->arrays->serverRandom, RAN_LEN);
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Md5Update(md5, output + preSigIdx, preSigSz);
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Md5Final(md5, hash);
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|
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/* sha */
|
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ret = InitSha(&sha);
|
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#ifdef CYASSL_SMALL_STACK
|
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sha = (Sha*)XMALLOC(sizeof(Sha), NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
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if (sha == NULL)
|
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ERROR_OUT(MEMORY_E, done_b);
|
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#endif
|
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|
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if ((ret = InitSha(sha) != 0))
|
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goto done_b;
|
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|
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ShaUpdate(sha, ssl->arrays->clientRandom, RAN_LEN);
|
||||
ShaUpdate(sha, ssl->arrays->serverRandom, RAN_LEN);
|
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ShaUpdate(sha, output + preSigIdx, preSigSz);
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ShaFinal(sha, &hash[MD5_DIGEST_SIZE]);
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#endif
|
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|
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#ifndef NO_SHA256
|
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#ifdef CYASSL_SMALL_STACK
|
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sha256 = (Sha256*)XMALLOC(sizeof(Sha256), NULL,
|
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DYNAMIC_TYPE_TMP_BUFFER);
|
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hash256 = (byte*)XMALLOC(SHA256_DIGEST_SIZE, NULL,
|
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DYNAMIC_TYPE_TMP_BUFFER);
|
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if (sha256 == NULL || hash256 == NULL)
|
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ERROR_OUT(MEMORY_E, done_b);
|
||||
#endif
|
||||
|
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if (!(ret = InitSha256(sha256))
|
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&& !(ret = Sha256Update(sha256, ssl->arrays->clientRandom,
|
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RAN_LEN))
|
||||
&& !(ret = Sha256Update(sha256, ssl->arrays->serverRandom,
|
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RAN_LEN))
|
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&& !(ret = Sha256Update(sha256, output + preSigIdx, preSigSz)))
|
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ret = Sha256Final(sha256, hash256);
|
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|
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if (ret != 0)
|
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return ret;
|
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ShaUpdate(&sha, ssl->arrays->clientRandom, RAN_LEN);
|
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ShaUpdate(&sha, ssl->arrays->serverRandom, RAN_LEN);
|
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ShaUpdate(&sha, output + preSigIdx, preSigSz);
|
||||
ShaFinal(&sha, &hash[MD5_DIGEST_SIZE]);
|
||||
#endif
|
||||
goto done_b;
|
||||
#endif
|
||||
|
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#ifndef NO_SHA256
|
||||
ret = InitSha256(&sha256);
|
||||
if (ret != 0)
|
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return ret;
|
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ret = Sha256Update(&sha256, ssl->arrays->clientRandom, RAN_LEN);
|
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if (ret != 0)
|
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return ret;
|
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ret = Sha256Update(&sha256, ssl->arrays->serverRandom, RAN_LEN);
|
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if (ret != 0)
|
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return ret;
|
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ret = Sha256Update(&sha256, output + preSigIdx, preSigSz);
|
||||
if (ret != 0)
|
||||
return ret;
|
||||
ret = Sha256Final(&sha256, hash256);
|
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if (ret != 0)
|
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return ret;
|
||||
#endif
|
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#ifdef CYASSL_SHA384
|
||||
#ifdef CYASSL_SMALL_STACK
|
||||
sha384 = (Sha384*)XMALLOC(sizeof(Sha384), NULL,
|
||||
DYNAMIC_TYPE_TMP_BUFFER);
|
||||
hash384 = (byte*)XMALLOC(SHA384_DIGEST_SIZE, NULL,
|
||||
DYNAMIC_TYPE_TMP_BUFFER);
|
||||
if (sha384 == NULL || hash384 == NULL)
|
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ERROR_OUT(MEMORY_E, done_b);
|
||||
#endif
|
||||
|
||||
if (!(ret = InitSha384(sha384))
|
||||
&& !(ret = Sha384Update(sha384, ssl->arrays->clientRandom,
|
||||
RAN_LEN))
|
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&& !(ret = Sha384Update(sha384, ssl->arrays->serverRandom,
|
||||
RAN_LEN))
|
||||
&& !(ret = Sha384Update(sha384, output + preSigIdx, preSigSz)))
|
||||
ret = Sha384Final(sha384, hash384);
|
||||
|
||||
if (ret != 0)
|
||||
goto done_b;
|
||||
#endif
|
||||
|
||||
#ifdef CYASSL_SHA384
|
||||
ret = InitSha384(&sha384);
|
||||
if (ret != 0)
|
||||
return ret;
|
||||
ret = Sha384Update(&sha384, ssl->arrays->clientRandom, RAN_LEN);
|
||||
if (ret != 0)
|
||||
return ret;
|
||||
ret = Sha384Update(&sha384, ssl->arrays->serverRandom, RAN_LEN);
|
||||
if (ret != 0)
|
||||
return ret;
|
||||
ret = Sha384Update(&sha384, output + preSigIdx, preSigSz);
|
||||
if (ret != 0)
|
||||
return ret;
|
||||
ret = Sha384Final(&sha384, hash384);
|
||||
if (ret != 0)
|
||||
return ret;
|
||||
#endif
|
||||
#ifndef NO_RSA
|
||||
if (ssl->suites->sigAlgo == rsa_sa_algo) {
|
||||
byte* signBuffer = hash;
|
||||
word32 signSz = FINISHED_SZ;
|
||||
#ifdef CYASSL_SMALL_STACK
|
||||
byte* encodedSig = NULL;
|
||||
#else
|
||||
byte encodedSig[MAX_ENCODED_SIG_SZ];
|
||||
#endif
|
||||
byte doUserRsa = 0;
|
||||
|
||||
#ifdef HAVE_PK_CALLBACKS
|
||||
@@ -11844,6 +11978,13 @@ int DoSessionTicket(CYASSL* ssl,
|
||||
doUserRsa = 1;
|
||||
#endif
|
||||
|
||||
#ifdef CYASSL_SMALL_STACK
|
||||
encodedSig = (byte*)XMALLOC(MAX_ENCODED_SIG_SZ, NULL,
|
||||
DYNAMIC_TYPE_TMP_BUFFER);
|
||||
if (encodedSig == NULL)
|
||||
ERROR_OUT(MEMORY_E, done_b);
|
||||
#endif
|
||||
|
||||
if (IsAtLeastTLSv1_2(ssl)) {
|
||||
byte* digest = &hash[MD5_DIGEST_SIZE];
|
||||
int typeH = SHAh;
|
||||
@@ -11883,9 +12024,30 @@ int DoSessionTicket(CYASSL* ssl,
|
||||
sigSz, &rsaKey, ssl->rng);
|
||||
|
||||
FreeRsaKey(&rsaKey);
|
||||
|
||||
#ifdef CYASSL_SMALL_STACK
|
||||
XFREE(encodedSig, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
||||
#endif
|
||||
}
|
||||
#endif
|
||||
|
||||
done_b:
|
||||
#ifdef CYASSL_SMALL_STACK
|
||||
#ifndef NO_OLD_TLS
|
||||
XFREE(md5, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
||||
XFREE(sha, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
||||
#endif
|
||||
XFREE(hash, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
||||
#ifndef NO_SHA256
|
||||
XFREE(sha256, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
||||
XFREE(hash256, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
||||
#endif
|
||||
#ifdef CYASSL_SHA384
|
||||
XFREE(sha384, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
||||
XFREE(hash384, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
||||
#endif
|
||||
#endif
|
||||
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user