--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/ssl/libcrypto/src/crypto/rsa/rsa_sign.c Fri Jun 04 16:20:51 2010 +0100
@@ -0,0 +1,248 @@
+/* crypto/rsa/rsa_sign.c */
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to. The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code. The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * "This product includes cryptographic software written by
+ * Eric Young (eay@cryptsoft.com)"
+ * The word 'cryptographic' can be left out if the rouines from the library
+ * being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ * the apps directory (application code) you must include an acknowledgement:
+ * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+
+#include <stdio.h>
+#include "cryptlib.h"
+#include <openssl/bn.h>
+#include <openssl/rsa.h>
+#include <openssl/objects.h>
+#include <openssl/x509.h>
+
+/* Size of an SSL signature: MD5+SHA1 */
+#define SSL_SIG_LENGTH 36
+
+EXPORT_C int RSA_sign(int type, const unsigned char *m, unsigned int m_len,
+ unsigned char *sigret, unsigned int *siglen, RSA *rsa)
+ {
+ X509_SIG sig;
+ ASN1_TYPE parameter;
+ int i,j,ret=1;
+ unsigned char *p, *tmps = NULL;
+ const unsigned char *s = NULL;
+ X509_ALGOR algor;
+ ASN1_OCTET_STRING digest;
+ if((rsa->flags & RSA_FLAG_SIGN_VER) && rsa->meth->rsa_sign)
+ {
+ return rsa->meth->rsa_sign(type, m, m_len,
+ sigret, siglen, rsa);
+ }
+ /* Special case: SSL signature, just check the length */
+ if(type == NID_md5_sha1) {
+ if(m_len != SSL_SIG_LENGTH) {
+ RSAerr(RSA_F_RSA_SIGN,RSA_R_INVALID_MESSAGE_LENGTH);
+ return(0);
+ }
+ i = SSL_SIG_LENGTH;
+ s = m;
+ } else {
+ sig.algor= &algor;
+ sig.algor->algorithm=OBJ_nid2obj(type);
+ if (sig.algor->algorithm == NULL)
+ {
+ RSAerr(RSA_F_RSA_SIGN,RSA_R_UNKNOWN_ALGORITHM_TYPE);
+ return(0);
+ }
+ if (sig.algor->algorithm->length == 0)
+ {
+ RSAerr(RSA_F_RSA_SIGN,RSA_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD);
+ return(0);
+ }
+ parameter.type=V_ASN1_NULL;
+ parameter.value.ptr=NULL;
+ sig.algor->parameter= ¶meter;
+
+ sig.digest= &digest;
+ sig.digest->data=(unsigned char *)m; /* TMP UGLY CAST */
+ sig.digest->length=m_len;
+
+ i=i2d_X509_SIG(&sig,NULL);
+ }
+ j=RSA_size(rsa);
+ if (i > (j-RSA_PKCS1_PADDING_SIZE))
+ {
+ RSAerr(RSA_F_RSA_SIGN,RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY);
+ return(0);
+ }
+ if(type != NID_md5_sha1) {
+ tmps=(unsigned char *)OPENSSL_malloc((unsigned int)j+1);
+ if (tmps == NULL)
+ {
+ RSAerr(RSA_F_RSA_SIGN,ERR_R_MALLOC_FAILURE);
+ return(0);
+ }
+ p=tmps;
+ i2d_X509_SIG(&sig,&p);
+ s=tmps;
+ }
+ i=RSA_private_encrypt(i,s,sigret,rsa,RSA_PKCS1_PADDING);
+ if (i <= 0)
+ ret=0;
+ else
+ *siglen=i;
+
+ if(type != NID_md5_sha1) {
+ OPENSSL_cleanse(tmps,(unsigned int)j+1);
+ OPENSSL_free(tmps);
+ }
+ return(ret);
+ }
+
+EXPORT_C int RSA_verify(int dtype, const unsigned char *m, unsigned int m_len,
+ unsigned char *sigbuf, unsigned int siglen, RSA *rsa)
+ {
+ int i,ret=0,sigtype;
+ unsigned char *s;
+ X509_SIG *sig=NULL;
+
+ if (siglen != (unsigned int)RSA_size(rsa))
+ {
+ RSAerr(RSA_F_RSA_VERIFY,RSA_R_WRONG_SIGNATURE_LENGTH);
+ return(0);
+ }
+
+ if((rsa->flags & RSA_FLAG_SIGN_VER) && rsa->meth->rsa_verify)
+ {
+ return rsa->meth->rsa_verify(dtype, m, m_len,
+ sigbuf, siglen, rsa);
+ }
+
+ s=(unsigned char *)OPENSSL_malloc((unsigned int)siglen);
+ if (s == NULL)
+ {
+ RSAerr(RSA_F_RSA_VERIFY,ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ if((dtype == NID_md5_sha1) && (m_len != SSL_SIG_LENGTH) ) {
+ RSAerr(RSA_F_RSA_VERIFY,RSA_R_INVALID_MESSAGE_LENGTH);
+ goto err;
+ }
+ i=RSA_public_decrypt((int)siglen,sigbuf,s,rsa,RSA_PKCS1_PADDING);
+
+ if (i <= 0) goto err;
+
+ /* Special case: SSL signature */
+ if(dtype == NID_md5_sha1) {
+ if((i != SSL_SIG_LENGTH) || memcmp(s, m, SSL_SIG_LENGTH))
+ RSAerr(RSA_F_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
+ else ret = 1;
+ } else {
+ const unsigned char *p=s;
+ sig=d2i_X509_SIG(NULL,&p,(long)i);
+
+ if (sig == NULL) goto err;
+
+ /* Excess data can be used to create forgeries */
+ if(p != s+i)
+ {
+ RSAerr(RSA_F_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
+ goto err;
+ }
+
+ /* Parameters to the signature algorithm can also be used to
+ create forgeries */
+ if(sig->algor->parameter
+ && ASN1_TYPE_get(sig->algor->parameter) != V_ASN1_NULL)
+ {
+ RSAerr(RSA_F_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
+ goto err;
+ }
+ sigtype=OBJ_obj2nid(sig->algor->algorithm);
+
+
+ #ifdef RSA_DEBUG
+ /* put a backward compatibility flag in EAY */
+ fprintf(stderr,"in(%s) expect(%s)\n",OBJ_nid2ln(sigtype),
+ OBJ_nid2ln(dtype));
+ #endif
+ if (sigtype != dtype)
+ {
+ if (((dtype == NID_md5) &&
+ (sigtype == NID_md5WithRSAEncryption)) ||
+ ((dtype == NID_md2) &&
+ (sigtype == NID_md2WithRSAEncryption)))
+ {
+ /* ok, we will let it through */
+#if !defined(OPENSSL_NO_STDIO) && !defined(OPENSSL_SYS_WIN16)
+ fprintf(stderr,"signature has problems, re-make with post SSLeay045\n");
+#endif
+ }
+ else
+ {
+ RSAerr(RSA_F_RSA_VERIFY,
+ RSA_R_ALGORITHM_MISMATCH);
+ goto err;
+ }
+ }
+ if ( ((unsigned int)sig->digest->length != m_len) ||
+ (memcmp(m,sig->digest->data,m_len) != 0))
+ {
+ RSAerr(RSA_F_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
+ }
+ else
+ ret=1;
+ }
+err:
+ if (sig != NULL) X509_SIG_free(sig);
+ if (s != NULL)
+ {
+ OPENSSL_cleanse(s,(unsigned int)siglen);
+ OPENSSL_free(s);
+ }
+ return(ret);
+ }
+