--- /dev/null
+/* fips_rsa_sign.c */
+/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
+ * project 2007.
+ */
+/* ====================================================================
+ * Copyright (c) 2007 The OpenSSL Project. All rights reserved.
+ *
+ * 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 above 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 acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED 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 OpenSSL PROJECT OR
+ * ITS 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.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+#define OPENSSL_FIPSEVP
+
+#include <string.h>
+#include <openssl/evp.h>
+#include <openssl/rsa.h>
+#include <openssl/err.h>
+#include <openssl/sha.h>
+
+#ifdef OPENSSL_FIPS
+
+/* FIPS versions of RSA_sign() and RSA_verify().
+ * These will only have to deal with SHA* signatures and by including
+ * pregenerated encodings all ASN1 dependencies can be avoided
+ */
+
+/* Standard encodings including NULL parameter */
+
+static const unsigned char sha1_bin[] = {
+ 0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2b, 0x0e, 0x03, 0x02, 0x1a, 0x05,
+ 0x00, 0x04, 0x14
+};
+
+static const unsigned char sha224_bin[] = {
+ 0x30, 0x2d, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
+ 0x04, 0x02, 0x04, 0x05, 0x00, 0x04, 0x1c
+};
+
+static const unsigned char sha256_bin[] = {
+ 0x30, 0x31, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
+ 0x04, 0x02, 0x01, 0x05, 0x00, 0x04, 0x20
+};
+
+static const unsigned char sha384_bin[] = {
+ 0x30, 0x41, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
+ 0x04, 0x02, 0x02, 0x05, 0x00, 0x04, 0x30
+};
+
+static const unsigned char sha512_bin[] = {
+ 0x30, 0x51, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
+ 0x04, 0x02, 0x03, 0x05, 0x00, 0x04, 0x40
+};
+
+/* Alternate encodings with absent parameters. We don't generate signature
+ * using this format but do tolerate received signatures of this form.
+ */
+
+static unsigned char sha1_nn_bin[] = {
+ 0x30, 0x1f, 0x30, 0x07, 0x06, 0x05, 0x2b, 0x0e, 0x03, 0x02, 0x1a, 0x04,
+ 0x14
+};
+
+static unsigned char sha224_nn_bin[] = {
+ 0x30, 0x2b, 0x30, 0x0b, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
+ 0x04, 0x02, 0x04, 0x04, 0x1c
+};
+
+static unsigned char sha256_nn_bin[] = {
+ 0x30, 0x2f, 0x30, 0x0b, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
+ 0x04, 0x02, 0x01, 0x04, 0x20
+};
+
+static unsigned char sha384_nn_bin[] = {
+ 0x30, 0x3f, 0x30, 0x0b, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
+ 0x04, 0x02, 0x02, 0x04, 0x30
+};
+
+static unsigned char sha512_nn_bin[] = {
+ 0x30, 0x4f, 0x30, 0x0b, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
+ 0x04, 0x02, 0x03, 0x04, 0x40
+};
+
+
+static const unsigned char *fips_digestinfo_encoding(int nid, unsigned int *len)
+ {
+ switch (nid)
+ {
+
+ case NID_sha1:
+ *len = sizeof(sha1_bin);
+ return sha1_bin;
+
+ case NID_sha224:
+ *len = sizeof(sha224_bin);
+ return sha224_bin;
+
+ case NID_sha256:
+ *len = sizeof(sha256_bin);
+ return sha256_bin;
+
+ case NID_sha384:
+ *len = sizeof(sha384_bin);
+ return sha384_bin;
+
+ case NID_sha512:
+ *len = sizeof(sha512_bin);
+ return sha512_bin;
+
+ default:
+ return NULL;
+
+ }
+ }
+
+static const unsigned char *fips_digestinfo_nn_encoding(int nid, unsigned int *len)
+ {
+ switch (nid)
+ {
+
+ case NID_sha1:
+ *len = sizeof(sha1_nn_bin);
+ return sha1_nn_bin;
+
+ case NID_sha224:
+ *len = sizeof(sha224_nn_bin);
+ return sha224_nn_bin;
+
+ case NID_sha256:
+ *len = sizeof(sha256_nn_bin);
+ return sha256_nn_bin;
+
+ case NID_sha384:
+ *len = sizeof(sha384_nn_bin);
+ return sha384_nn_bin;
+
+ case NID_sha512:
+ *len = sizeof(sha512_nn_bin);
+ return sha512_nn_bin;
+
+ default:
+ return NULL;
+
+ }
+ }
+
+
+int FIPS_rsa_sign_ctx(RSA *rsa, EVP_MD_CTX *ctx,
+ int rsa_pad_mode, int saltlen, const EVP_MD *mgf1Hash,
+ unsigned char *sigret, unsigned int *siglen)
+ {
+ int i=0,j,ret=0;
+ unsigned int dlen;
+ const unsigned char *der;
+ unsigned int m_len;
+ const EVP_MD *mhash;
+ int md_type;
+ /* Largest DigestInfo: 19 (max encoding) + max MD */
+ unsigned char tmpdinfo[19 + EVP_MAX_MD_SIZE];
+ unsigned char md[EVP_MAX_MD_SIZE + 1];
+
+ EVP_DigestFinal_ex(ctx, md, &m_len);
+
+ mhash = M_EVP_MD_CTX_md(ctx);
+ md_type = M_EVP_MD_type(mhash);
+
+ if (rsa_pad_mode == RSA_X931_PADDING)
+ {
+ int hash_id;
+ memcpy(tmpdinfo, md, m_len);
+ hash_id = RSA_X931_hash_id(md_type);
+ if (hash_id == -1)
+ {
+ RSAerr(RSA_F_FIPS_RSA_SIGN,RSA_R_UNKNOWN_ALGORITHM_TYPE);
+ return 0;
+ }
+ tmpdinfo[m_len] = (unsigned char)hash_id;
+ i = m_len + 1;
+ }
+ else if (rsa_pad_mode == RSA_PKCS1_PADDING)
+ {
+
+ der = fips_digestinfo_encoding(md_type, &dlen);
+
+ if (!der)
+ {
+ RSAerr(RSA_F_FIPS_RSA_SIGN,RSA_R_UNKNOWN_ALGORITHM_TYPE);
+ return 0;
+ }
+ memcpy(tmpdinfo, der, dlen);
+ memcpy(tmpdinfo + dlen, md, m_len);
+
+ i = dlen + m_len;
+
+ }
+ else if (rsa_pad_mode == RSA_PKCS1_PSS_PADDING)
+ {
+ unsigned char *sbuf;
+ i = RSA_size(rsa);
+ sbuf = OPENSSL_malloc(RSA_size(rsa));
+ if (!sbuf)
+ {
+ RSAerr(RSA_F_FIPS_RSA_SIGN,ERR_R_MALLOC_FAILURE);
+ goto psserr;
+ }
+ if (!RSA_padding_add_PKCS1_PSS_mgf1(rsa, sbuf, md, mhash,
+ mgf1Hash, saltlen))
+ goto psserr;
+ j=rsa->meth->rsa_priv_enc(i,sbuf,sigret,rsa,RSA_NO_PADDING);
+ if (j > 0)
+ {
+ ret=1;
+ *siglen=j;
+ }
+ psserr:
+ OPENSSL_cleanse(md,m_len);
+ OPENSSL_cleanse(sbuf, i);
+ OPENSSL_free(sbuf);
+ return ret;
+ }
+
+ j=RSA_size(rsa);
+ if (i > (j-RSA_PKCS1_PADDING_SIZE))
+ {
+ RSAerr(RSA_F_FIPS_RSA_SIGN,RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY);
+ goto done;
+ }
+ /* NB: call underlying method directly to avoid FIPS blocking */
+ j=rsa->meth->rsa_priv_enc(i,tmpdinfo,sigret,rsa,rsa_pad_mode);
+ if (j > 0)
+ {
+ ret=1;
+ *siglen=j;
+ }
+
+ done:
+ OPENSSL_cleanse(tmpdinfo,i);
+ OPENSSL_cleanse(md,m_len);
+ return ret;
+ }
+
+int FIPS_rsa_verify_ctx(RSA *rsa, EVP_MD_CTX *ctx,
+ int rsa_pad_mode, int saltlen, const EVP_MD *mgf1Hash,
+ unsigned char *sigbuf, unsigned int siglen)
+ {
+ int i,ret=0;
+ unsigned int dlen, diglen;
+ unsigned char *s;
+ const unsigned char *der;
+ unsigned char dig[EVP_MAX_MD_SIZE];
+ const EVP_MD *mhash;
+ int md_type;
+ int rsa_dec_pad_mode;
+
+ if (siglen != (unsigned int)RSA_size(rsa))
+ {
+ RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_WRONG_SIGNATURE_LENGTH);
+ return(0);
+ }
+
+ mhash = M_EVP_MD_CTX_md(ctx);
+ md_type = M_EVP_MD_type(mhash);
+
+ EVP_DigestFinal_ex(ctx, dig, &diglen);
+
+ s= OPENSSL_malloc((unsigned int)siglen);
+ if (s == NULL)
+ {
+ RSAerr(RSA_F_FIPS_RSA_VERIFY,ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ if (rsa_pad_mode == RSA_PKCS1_PSS_PADDING)
+ rsa_dec_pad_mode = RSA_NO_PADDING;
+ else
+ rsa_dec_pad_mode = rsa_pad_mode;
+
+ /* NB: call underlying method directly to avoid FIPS blocking */
+ i=rsa->meth->rsa_pub_dec((int)siglen,sigbuf,s, rsa, rsa_dec_pad_mode);
+
+ if (i <= 0) goto err;
+
+ if (rsa_pad_mode == RSA_X931_PADDING)
+ {
+ int hash_id;
+ if (i != (int)(diglen + 1))
+ {
+ RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
+ goto err;
+ }
+ hash_id = RSA_X931_hash_id(md_type);
+ if (hash_id == -1)
+ {
+ RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_UNKNOWN_ALGORITHM_TYPE);
+ goto err;
+ }
+ if (s[diglen] != (unsigned char)hash_id)
+ {
+ RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
+ goto err;
+ }
+ if (memcmp(s, dig, diglen))
+ {
+ RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
+ goto err;
+ }
+ ret = 1;
+ }
+ else if (rsa_pad_mode == RSA_PKCS1_PADDING)
+ {
+
+ der = fips_digestinfo_encoding(md_type, &dlen);
+
+ if (!der)
+ {
+ RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_UNKNOWN_ALGORITHM_TYPE);
+ return(0);
+ }
+
+ /* Compare, DigestInfo length, DigestInfo header and finally
+ * digest value itself
+ */
+
+ /* If length mismatch try alternate encoding */
+ if (i != (int)(dlen + diglen))
+ der = fips_digestinfo_nn_encoding(md_type, &dlen);
+
+ if ((i != (int)(dlen + diglen)) || memcmp(der, s, dlen)
+ || memcmp(s + dlen, dig, diglen))
+ {
+ RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
+ goto err;
+ }
+ ret = 1;
+
+ }
+ else if (rsa_pad_mode == RSA_PKCS1_PSS_PADDING)
+ {
+ ret = RSA_verify_PKCS1_PSS_mgf1(rsa, dig, mhash, mgf1Hash,
+ s, saltlen);
+ if (ret < 0)
+ ret = 0;
+ }
+err:
+ if (s != NULL)
+ {
+ OPENSSL_cleanse(s, siglen);
+ OPENSSL_free(s);
+ }
+ return(ret);
+ }
+
+#endif
projects / openssl.git / blobdiff