94 lines
2.7 KiB
C
94 lines
2.7 KiB
C
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/* Copyright (C) 2006, 2007 The Written Word, Inc. All rights reserved.
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* Author: Simon Josefsson
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*
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* Redistribution and use in source and binary forms,
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* with or without modification, are permitted provided
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* that the following conditions are met:
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*
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* Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the
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* following disclaimer.
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*
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* Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* Neither the name of the copyright holder nor the names
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* of any other contributors may be used to endorse or
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* promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*/
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#include "libgcrypt.h"
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int _libssh2_rsa_new(libssh2_rsa_ctx **rsa,
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const unsigned char *edata,
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unsigned long elen,
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const unsigned char *ndata,
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unsigned long nlen)
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{
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int rc;
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rc = gcry_sexp_build (rsa, NULL, "(public-key(rsa(n%b)(e%b)))",
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nlen, ndata, elen, edata);
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if (rc)
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{
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*rsa = NULL;
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return -1;
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}
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return 0;
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}
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int _libssh2_rsa_sha1_verify(libssh2_rsa_ctx *rsa,
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const unsigned char *sig,
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unsigned long sig_len,
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const unsigned char *m,
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unsigned long m_len)
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{
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unsigned char hash[SHA_DIGEST_LENGTH];
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int ret;
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gcry_sexp_t s_sig, s_hash;
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int rc = -1;
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libssh2_sha1(m, m_len, hash);
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rc = gcry_sexp_build (&s_hash, NULL,
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"(data (flags pkcs1) (hash sha1 %b))",
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SHA_DIGEST_LENGTH, hash);
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if (rc != 0)
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{
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return -1;
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}
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rc = gcry_sexp_build (&s_sig, NULL, "(sig-val(rsa(s %b)))",
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sig_len, sig);
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if (rc != 0)
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{
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gcry_sexp_release (s_hash);
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return -1;
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}
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rc = gcry_pk_verify (s_sig, s_hash, rsa);
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gcry_sexp_release (s_sig);
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gcry_sexp_release (s_hash);
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return (rc == 0) ? 0 : -1;
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}
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