Include PKCS5_PBKDF2_HMAC() for compatibility with OpenSSL <1.0.0

util.c

@@ -288,6 +288,118 @@ vg_decode_privkey(const char *b58encoded, EC_KEY *pkey, int *addrtype)
 	return res;
 }
 
+#if OPENSSL_VERSION_NUMBER < 0x10000000L
+/* The generic PBKDF2 function first appeared in OpenSSL 1.0 */
+/* ====================================================================
+ * Copyright (c) 1999-2006 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).
+ *
+ */
+int
+PKCS5_PBKDF2_HMAC(const char *pass, int passlen,
+		  const unsigned char *salt, int saltlen, int iter,
+		  const EVP_MD *digest,
+		  int keylen, unsigned char *out)
+{
+	unsigned char digtmp[EVP_MAX_MD_SIZE], *p, itmp[4];
+	int cplen, j, k, tkeylen, mdlen;
+	unsigned long i = 1;
+	HMAC_CTX hctx;
+
+	mdlen = EVP_MD_size(digest);
+	if (mdlen < 0)
+		return 0;
+
+	HMAC_CTX_init(&hctx);
+	p = out;
+	tkeylen = keylen;
+	if(!pass)
+		passlen = 0;
+	else if(passlen == -1)
+		passlen = strlen(pass);
+	while(tkeylen)
+		{
+		if(tkeylen > mdlen)
+			cplen = mdlen;
+		else
+			cplen = tkeylen;
+		/* We are unlikely to ever use more than 256 blocks (5120 bits!)
+		 * but just in case...
+		 */
+		itmp[0] = (unsigned char)((i >> 24) & 0xff);
+		itmp[1] = (unsigned char)((i >> 16) & 0xff);
+		itmp[2] = (unsigned char)((i >> 8) & 0xff);
+		itmp[3] = (unsigned char)(i & 0xff);
+		HMAC_Init_ex(&hctx, pass, passlen, digest, NULL);
+		HMAC_Update(&hctx, salt, saltlen);
+		HMAC_Update(&hctx, itmp, 4);
+		HMAC_Final(&hctx, digtmp, NULL);
+		memcpy(p, digtmp, cplen);
+		for(j = 1; j < iter; j++)
+			{
+			HMAC(digest, pass, passlen,
+				 digtmp, mdlen, digtmp, NULL);
+			for(k = 0; k < cplen; k++)
+				p[k] ^= digtmp[k];
+			}
+		tkeylen-= cplen;
+		i++;
+		p+= cplen;
+		}
+	HMAC_CTX_cleanup(&hctx);
+	return 1;
+}
+#endif  /* OPENSSL_VERSION_NUMBER < 0x10000000L */
+
+
 #define VG_PROTKEY_SALT_SIZE 4
 #define VG_PROTKEY_HMAC_SIZE 8
 #define VG_PROTKEY_HMAC_KEY_SIZE 16
@@ -418,10 +530,11 @@ vg_protect_decode_privkey(EC_KEY *pkey, int *keytype,
 	int res;
 
 	res = vg_b58_decode_check(encoded, ecenc, sizeof(ecenc));
-	if (res != 45)
+	if (res != (33 + VG_PROTKEY_HMAC_SIZE + VG_PROTKEY_SALT_SIZE))
 		return 0;
 
-	memcpy(salt, ecenc + 41, VG_PROTKEY_SALT_SIZE);
+	memcpy(salt, ecenc + 33 + VG_PROTKEY_HMAC_SIZE,
+	       VG_PROTKEY_SALT_SIZE);
 
 	ctx = EVP_CIPHER_CTX_new();