diff options
Diffstat (limited to 'crypto/openssh/ssh-rsa.c')
| -rw-r--r-- | crypto/openssh/ssh-rsa.c | 181 |
1 files changed, 0 insertions, 181 deletions
diff --git a/crypto/openssh/ssh-rsa.c b/crypto/openssh/ssh-rsa.c deleted file mode 100644 index 782279bad23b..000000000000 --- a/crypto/openssh/ssh-rsa.c +++ /dev/null @@ -1,181 +0,0 @@ -/* - * Copyright (c) 2000 Markus Friedl. 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. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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. - */ - -#include "includes.h" -RCSID("$OpenBSD: ssh-rsa.c,v 1.21 2002/06/23 03:30:17 deraadt Exp $"); - -#include <openssl/evp.h> -#include <openssl/err.h> - -#include "xmalloc.h" -#include "log.h" -#include "buffer.h" -#include "bufaux.h" -#include "key.h" -#include "ssh-rsa.h" -#include "compat.h" -#include "ssh.h" - -/* RSASSA-PKCS1-v1_5 (PKCS #1 v2.0 signature) with SHA1 */ -int -ssh_rsa_sign(Key *key, u_char **sigp, u_int *lenp, - u_char *data, u_int datalen) -{ - const EVP_MD *evp_md; - EVP_MD_CTX md; - u_char digest[EVP_MAX_MD_SIZE], *sig, *ret; - u_int slen, dlen, len; - int ok, nid; - Buffer b; - - if (key == NULL || key->type != KEY_RSA || key->rsa == NULL) { - error("ssh_rsa_sign: no RSA key"); - return -1; - } - nid = (datafellows & SSH_BUG_RSASIGMD5) ? NID_md5 : NID_sha1; - if ((evp_md = EVP_get_digestbynid(nid)) == NULL) { - error("ssh_rsa_sign: EVP_get_digestbynid %d failed", nid); - return -1; - } - EVP_DigestInit(&md, evp_md); - EVP_DigestUpdate(&md, data, datalen); - EVP_DigestFinal(&md, digest, &dlen); - - slen = RSA_size(key->rsa); - sig = xmalloc(slen); - - ok = RSA_sign(nid, digest, dlen, sig, &len, key->rsa); - memset(digest, 'd', sizeof(digest)); - - if (ok != 1) { - int ecode = ERR_get_error(); - error("ssh_rsa_sign: RSA_sign failed: %s", - ERR_error_string(ecode, NULL)); - xfree(sig); - return -1; - } - if (len < slen) { - int diff = slen - len; - debug("slen %u > len %u", slen, len); - memmove(sig + diff, sig, len); - memset(sig, 0, diff); - } else if (len > slen) { - error("ssh_rsa_sign: slen %u slen2 %u", slen, len); - xfree(sig); - return -1; - } - /* encode signature */ - buffer_init(&b); - buffer_put_cstring(&b, "ssh-rsa"); - buffer_put_string(&b, sig, slen); - len = buffer_len(&b); - ret = xmalloc(len); - memcpy(ret, buffer_ptr(&b), len); - buffer_free(&b); - memset(sig, 's', slen); - xfree(sig); - - if (lenp != NULL) - *lenp = len; - if (sigp != NULL) - *sigp = ret; - return 0; -} - -int -ssh_rsa_verify(Key *key, u_char *signature, u_int signaturelen, - u_char *data, u_int datalen) -{ - Buffer b; - const EVP_MD *evp_md; - EVP_MD_CTX md; - char *ktype; - u_char digest[EVP_MAX_MD_SIZE], *sigblob; - u_int len, dlen, modlen; - int rlen, ret, nid; - - if (key == NULL || key->type != KEY_RSA || key->rsa == NULL) { - error("ssh_rsa_verify: no RSA key"); - return -1; - } - if (BN_num_bits(key->rsa->n) < SSH_RSA_MINIMUM_MODULUS_SIZE) { - error("ssh_rsa_verify: RSA modulus too small: %d < minimum %d bits", - BN_num_bits(key->rsa->n), SSH_RSA_MINIMUM_MODULUS_SIZE); - return -1; - } - buffer_init(&b); - buffer_append(&b, signature, signaturelen); - ktype = buffer_get_string(&b, NULL); - if (strcmp("ssh-rsa", ktype) != 0) { - error("ssh_rsa_verify: cannot handle type %s", ktype); - buffer_free(&b); - xfree(ktype); - return -1; - } - xfree(ktype); - sigblob = buffer_get_string(&b, &len); - rlen = buffer_len(&b); - buffer_free(&b); - if (rlen != 0) { - error("ssh_rsa_verify: remaining bytes in signature %d", rlen); - xfree(sigblob); - return -1; - } - /* RSA_verify expects a signature of RSA_size */ - modlen = RSA_size(key->rsa); - if (len > modlen) { - error("ssh_rsa_verify: len %u > modlen %u", len, modlen); - xfree(sigblob); - return -1; - } else if (len < modlen) { - int diff = modlen - len; - debug("ssh_rsa_verify: add padding: modlen %u > len %u", - modlen, len); - sigblob = xrealloc(sigblob, modlen); - memmove(sigblob + diff, sigblob, len); - memset(sigblob, 0, diff); - len = modlen; - } - nid = (datafellows & SSH_BUG_RSASIGMD5) ? NID_md5 : NID_sha1; - if ((evp_md = EVP_get_digestbynid(nid)) == NULL) { - error("ssh_rsa_verify: EVP_get_digestbynid %d failed", nid); - xfree(sigblob); - return -1; - } - EVP_DigestInit(&md, evp_md); - EVP_DigestUpdate(&md, data, datalen); - EVP_DigestFinal(&md, digest, &dlen); - - ret = RSA_verify(nid, digest, dlen, sigblob, len, key->rsa); - memset(digest, 'd', sizeof(digest)); - memset(sigblob, 's', len); - xfree(sigblob); - if (ret == 0) { - int ecode = ERR_get_error(); - error("ssh_rsa_verify: RSA_verify failed: %s", - ERR_error_string(ecode, NULL)); - } - debug("ssh_rsa_verify: signature %scorrect", (ret==0) ? "in" : ""); - return ret; -} |