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-rw-r--r--thirdparty/openssl/crypto/rsa/rsa_sign.c301
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diff --git a/thirdparty/openssl/crypto/rsa/rsa_sign.c b/thirdparty/openssl/crypto/rsa/rsa_sign.c
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+/* 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>
+#include "rsa_locl.h"
+
+/* Size of an SSL signature: MD5+SHA1 */
+#define SSL_SIG_LENGTH 36
+
+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;
+#ifdef OPENSSL_FIPS
+ if (FIPS_mode() && !(rsa->meth->flags & RSA_FLAG_FIPS_METHOD)
+ && !(rsa->flags & RSA_FLAG_NON_FIPS_ALLOW)) {
+ RSAerr(RSA_F_RSA_SIGN, RSA_R_NON_FIPS_RSA_METHOD);
+ return 0;
+ }
+#endif
+ 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 = &parameter;
+
+ 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);
+}
+
+/*
+ * Check DigestInfo structure does not contain extraneous data by reencoding
+ * using DER and checking encoding against original.
+ */
+static int rsa_check_digestinfo(X509_SIG *sig, const unsigned char *dinfo,
+ int dinfolen)
+{
+ unsigned char *der = NULL;
+ int derlen;
+ int ret = 0;
+ derlen = i2d_X509_SIG(sig, &der);
+ if (derlen <= 0)
+ return 0;
+ if (derlen == dinfolen && !memcmp(dinfo, der, derlen))
+ ret = 1;
+ OPENSSL_cleanse(der, derlen);
+ OPENSSL_free(der);
+ return ret;
+}
+
+int int_rsa_verify(int dtype, const unsigned char *m,
+ unsigned int m_len,
+ unsigned char *rm, size_t *prm_len,
+ const unsigned char *sigbuf, size_t siglen, RSA *rsa)
+{
+ int i, ret = 0, sigtype;
+ unsigned char *s;
+ X509_SIG *sig = NULL;
+
+#ifdef OPENSSL_FIPS
+ if (FIPS_mode() && !(rsa->meth->flags & RSA_FLAG_FIPS_METHOD)
+ && !(rsa->flags & RSA_FLAG_NON_FIPS_ALLOW)) {
+ RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_NON_FIPS_RSA_METHOD);
+ return 0;
+ }
+#endif
+
+ if (siglen != (unsigned int)RSA_size(rsa)) {
+ RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_WRONG_SIGNATURE_LENGTH);
+ return (0);
+ }
+
+ if ((dtype == NID_md5_sha1) && rm) {
+ i = RSA_public_decrypt((int)siglen,
+ sigbuf, rm, rsa, RSA_PKCS1_PADDING);
+ if (i <= 0)
+ return 0;
+ *prm_len = i;
+ return 1;
+ }
+
+ s = (unsigned char *)OPENSSL_malloc((unsigned int)siglen);
+ if (s == NULL) {
+ RSAerr(RSA_F_INT_RSA_VERIFY, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ if ((dtype == NID_md5_sha1) && (m_len != SSL_SIG_LENGTH)) {
+ RSAerr(RSA_F_INT_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;
+ /*
+ * Oddball MDC2 case: signature can be OCTET STRING. check for correct
+ * tag and length octets.
+ */
+ if (dtype == NID_mdc2 && i == 18 && s[0] == 0x04 && s[1] == 0x10) {
+ if (rm) {
+ memcpy(rm, s + 2, 16);
+ *prm_len = 16;
+ ret = 1;
+ } else if (memcmp(m, s + 2, 16)) {
+ RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_BAD_SIGNATURE);
+ } else {
+ ret = 1;
+ }
+ } else if (dtype == NID_md5_sha1) {
+ /* Special case: SSL signature */
+ if ((i != SSL_SIG_LENGTH) || memcmp(s, m, SSL_SIG_LENGTH))
+ RSAerr(RSA_F_INT_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 || !rsa_check_digestinfo(sig, s, i)) {
+ RSAerr(RSA_F_INT_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_INT_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) {
+ RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_ALGORITHM_MISMATCH);
+ goto err;
+ }
+ if (rm) {
+ const EVP_MD *md;
+ md = EVP_get_digestbynid(dtype);
+ if (md && (EVP_MD_size(md) != sig->digest->length))
+ RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_INVALID_DIGEST_LENGTH);
+ else {
+ memcpy(rm, sig->digest->data, sig->digest->length);
+ *prm_len = sig->digest->length;
+ ret = 1;
+ }
+ } else if (((unsigned int)sig->digest->length != m_len) ||
+ (memcmp(m, sig->digest->data, m_len) != 0)) {
+ RSAerr(RSA_F_INT_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);
+}
+
+int RSA_verify(int dtype, const unsigned char *m, unsigned int m_len,
+ const unsigned char *sigbuf, unsigned int siglen, RSA *rsa)
+{
+
+ if ((rsa->flags & RSA_FLAG_SIGN_VER) && rsa->meth->rsa_verify) {
+ return rsa->meth->rsa_verify(dtype, m, m_len, sigbuf, siglen, rsa);
+ }
+
+ return int_rsa_verify(dtype, m, m_len, NULL, NULL, sigbuf, siglen, rsa);
+}
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