Delete bundled copy of OpenSSL and replace with README.

openssl/crypto/srp/srp_vfy.c

Index: openssl/crypto/srp/srp_vfy.c
diff --git a/openssl/crypto/srp/srp_vfy.c b/openssl/crypto/srp/srp_vfy.c
deleted file mode 100644
index 4a3d13edf6cbf4482e007a060267d9702b73f3b3..0000000000000000000000000000000000000000
--- a/openssl/crypto/srp/srp_vfy.c
+++ /dev/null
@@ -1,658 +0,0 @@
-/* crypto/srp/srp_vfy.c */
-/* Written by Christophe Renou (christophe.renou@edelweb.fr) with 
- * the precious help of Peter Sylvester (peter.sylvester@edelweb.fr) 
- * for the EdelKey project and contributed to the OpenSSL project 2004.
- */
-/* ====================================================================
- * Copyright (c) 2004 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).
- *
- */
-#ifndef OPENSSL_NO_SRP
-#include "cryptlib.h"
-#include "srp_lcl.h"
-#include <openssl/srp.h>
-#include <openssl/evp.h>
-#include <openssl/buffer.h>
-#include <openssl/rand.h>
-#include <openssl/txt_db.h>
-
-#define SRP_RANDOM_SALT_LEN 20
-#define MAX_LEN 2500
-
-static char b64table[] =
-  "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz./";
-
-/* the following two conversion routines have been inspired by code from Stanford */ 
-
-/*
- * Convert a base64 string into raw byte array representation.
- */
-static int t_fromb64(unsigned char *a, const char *src)
-	{
-	char *loc;
-	int i, j;
-	int size;
-
-	while(*src && (*src == ' ' || *src == '\t' || *src == '\n'))
-		++src;
-	size = strlen(src);
-	i = 0;
-	while(i < size)
-		{
-		loc = strchr(b64table, src[i]);
-		if(loc == (char *) 0) break;
-		else a[i] = loc - b64table;
-		++i;
-		}
-	size = i;
-	i = size - 1;
-	j = size;
-	while(1)
-		{
-		a[j] = a[i];
-		if(--i < 0) break;
-		a[j] |= (a[i] & 3) << 6;
-		--j;
-		a[j] = (unsigned char) ((a[i] & 0x3c) >> 2);
-		if(--i < 0) break;
-		a[j] |= (a[i] & 0xf) << 4;
-		--j;
-		a[j] = (unsigned char) ((a[i] & 0x30) >> 4);
-		if(--i < 0) break;
-		a[j] |= (a[i] << 2);
-
-		a[--j] = 0;
-		if(--i < 0) break;
-		}
-	while(a[j] == 0 && j <= size) ++j;
-	i = 0;
-	while (j <= size) a[i++] = a[j++];
-	return i;
-	}
-
-
-/*
- * Convert a raw byte string into a null-terminated base64 ASCII string.
- */
-static char *t_tob64(char *dst, const unsigned char *src, int size)
-	{
-	int c, pos = size % 3;
-	unsigned char b0 = 0, b1 = 0, b2 = 0, notleading = 0;
-	char *olddst = dst;
-
-	switch(pos)
-		{
-	case 1:
-		b2 = src[0];
-		break;
-	case 2:
-		b1 = src[0];
-		b2 = src[1];
-		break;
-		}
-
-	while(1)
-		{
-		c = (b0 & 0xfc) >> 2;
-		if(notleading || c != 0)
-			{
-			*dst++ = b64table[c];
-			notleading = 1;
-			}
-		c = ((b0 & 3) << 4) | ((b1 & 0xf0) >> 4);
-		if(notleading || c != 0)
-			{
-			*dst++ = b64table[c];
-			notleading = 1;
-			}
-		c = ((b1 & 0xf) << 2) | ((b2 & 0xc0) >> 6);
-		if(notleading || c != 0)
-			{
-			*dst++ = b64table[c];
-			notleading = 1;
-			}
-		c = b2 & 0x3f;
-		if(notleading || c != 0)
-			{
-			*dst++ = b64table[c];
-			notleading = 1;
-			}
-		if(pos >= size) break;
-		else
-			{
-			b0 = src[pos++];
-			b1 = src[pos++];
-			b2 = src[pos++];
-			}
-		}
-
-	*dst++ = '\0';
-	return olddst;
-	}
-
-static void SRP_user_pwd_free(SRP_user_pwd *user_pwd)
-	{
-	if (user_pwd == NULL) 
-		return;
-	BN_free(user_pwd->s);
-	BN_clear_free(user_pwd->v);
-	OPENSSL_free(user_pwd->id);
-	OPENSSL_free(user_pwd->info);
-	OPENSSL_free(user_pwd);
-	}
-
-static SRP_user_pwd *SRP_user_pwd_new()
-	{
-	SRP_user_pwd *ret = OPENSSL_malloc(sizeof(SRP_user_pwd));
-	if (ret == NULL)
-		return NULL;								
-	ret->N = NULL;
-	ret->g = NULL;	
-	ret->s = NULL;
-	ret->v = NULL;
-	ret->id = NULL ;
-	ret->info = NULL;
-	return ret;
-	}
-
-static void SRP_user_pwd_set_gN(SRP_user_pwd *vinfo, const BIGNUM *g,
-				const BIGNUM *N)
-	{
-	vinfo->N = N;
-	vinfo->g = g;	
-	}
-
-static int SRP_user_pwd_set_ids(SRP_user_pwd *vinfo, const char *id,
-				const char *info)
-	{
-	if (id != NULL && NULL == (vinfo->id = BUF_strdup(id)))
-		return 0;
-	return (info == NULL || NULL != (vinfo->info = BUF_strdup(info))) ;
-	}
-
-static int SRP_user_pwd_set_sv(SRP_user_pwd *vinfo, const char *s,
-			       const char *v)
-	{
-	unsigned char tmp[MAX_LEN];
-	int len;
-
-	if (strlen(s) > MAX_LEN || strlen(v) > MAX_LEN) 
-		return 0; 
-	len = t_fromb64(tmp, v);
-	if (NULL == (vinfo->v = BN_bin2bn(tmp, len, NULL)) )
-		return 0;
-	len = t_fromb64(tmp, s);
-	return ((vinfo->s = BN_bin2bn(tmp, len, NULL)) != NULL) ;
-	}
-
-static int SRP_user_pwd_set_sv_BN(SRP_user_pwd *vinfo, BIGNUM *s, BIGNUM *v)
-	{
-	vinfo->v = v;
-	vinfo->s = s;
-	return (vinfo->s != NULL && vinfo->v != NULL) ;
-	}
-
-SRP_VBASE *SRP_VBASE_new(char *seed_key)
-	{
-	SRP_VBASE *vb = (SRP_VBASE *) OPENSSL_malloc(sizeof(SRP_VBASE));
-
-	if (vb == NULL)
-		return NULL;
-	if (!(vb->users_pwd = sk_SRP_user_pwd_new_null()) ||
-		!(vb->gN_cache = sk_SRP_gN_cache_new_null()))
-		{
-		OPENSSL_free(vb);
-		return NULL;
-		}
-	vb->default_g = NULL;
-	vb->default_N = NULL;
-	vb->seed_key = NULL;
-	if ((seed_key != NULL) && 
-		(vb->seed_key = BUF_strdup(seed_key)) == NULL)
-		{
-		sk_SRP_user_pwd_free(vb->users_pwd);
-		sk_SRP_gN_cache_free(vb->gN_cache);
-		OPENSSL_free(vb);
-		return NULL;
-		}
-	return vb;
-	}
-
-
-int SRP_VBASE_free(SRP_VBASE *vb)
-	{
-	sk_SRP_user_pwd_pop_free(vb->users_pwd,SRP_user_pwd_free);
-	sk_SRP_gN_cache_free(vb->gN_cache);
-	OPENSSL_free(vb->seed_key);
-	OPENSSL_free(vb);
-	return 0;
-	}
-
-
-static SRP_gN_cache *SRP_gN_new_init(const char *ch)
-	{
-	unsigned char tmp[MAX_LEN];
-	int len;
-
-	SRP_gN_cache *newgN = (SRP_gN_cache *)OPENSSL_malloc(sizeof(SRP_gN_cache));
-	if (newgN == NULL)
-		return NULL;
-
-	if ((newgN->b64_bn = BUF_strdup(ch)) == NULL)
-		goto err;
-
-	len = t_fromb64(tmp, ch);
-	if ((newgN->bn = BN_bin2bn(tmp, len, NULL)))
-		return newgN;
-
-	OPENSSL_free(newgN->b64_bn);
-err:
-	OPENSSL_free(newgN);
-	return NULL;
-	}
-
-
-static void SRP_gN_free(SRP_gN_cache *gN_cache)
-	{
-	if (gN_cache == NULL)
-		return;
-	OPENSSL_free(gN_cache->b64_bn);
-	BN_free(gN_cache->bn);
-	OPENSSL_free(gN_cache);
-	}
-
-static SRP_gN *SRP_get_gN_by_id(const char *id, STACK_OF(SRP_gN) *gN_tab)
-	{
-	int i;
-
-	SRP_gN *gN;
-	if (gN_tab != NULL) 
-	for(i = 0; i < sk_SRP_gN_num(gN_tab); i++)
-		{
-		gN = sk_SRP_gN_value(gN_tab, i);
-		if (gN && (id == NULL || strcmp(gN->id,id)==0))
-			return gN;
-		}
-	
-	return SRP_get_default_gN(id);
-	}
-
-static BIGNUM *SRP_gN_place_bn(STACK_OF(SRP_gN_cache) *gN_cache, char *ch)
-	{
-	int i;
-	if (gN_cache == NULL)
-		return NULL;
-
-	/* search if we have already one... */
-	for(i = 0; i < sk_SRP_gN_cache_num(gN_cache); i++)
-		{
-		SRP_gN_cache *cache = sk_SRP_gN_cache_value(gN_cache, i);
-		if (strcmp(cache->b64_bn,ch)==0)
-			return cache->bn;
-		}
-		{		/* it is the first time that we find it */
-		SRP_gN_cache *newgN = SRP_gN_new_init(ch);
-		if (newgN)
-			{
-			if (sk_SRP_gN_cache_insert(gN_cache,newgN,0)>0)
-				return newgN->bn;
-			SRP_gN_free(newgN);
-			}
-		}
-	return NULL;
-	}
-
-/* this function parses verifier file. Format is:
- * string(index):base64(N):base64(g):0
- * string(username):base64(v):base64(salt):int(index)
- */
-
-
-int SRP_VBASE_init(SRP_VBASE *vb, char *verifier_file)
-	{
-	int error_code ;
-	STACK_OF(SRP_gN) *SRP_gN_tab = sk_SRP_gN_new_null();
-	char *last_index = NULL;
-	int i;
-	char **pp;
-
-	SRP_gN *gN = NULL;
-	SRP_user_pwd *user_pwd = NULL ;
-
-	TXT_DB *tmpdb = NULL;
-	BIO *in = BIO_new(BIO_s_file());
-
-	error_code = SRP_ERR_OPEN_FILE;
-
-	if (in == NULL || BIO_read_filename(in,verifier_file) <= 0)
-		goto err;
-
-	error_code = SRP_ERR_VBASE_INCOMPLETE_FILE;
-
-	if ((tmpdb =TXT_DB_read(in,DB_NUMBER)) == NULL)
-		goto err;
-
-	error_code = SRP_ERR_MEMORY;
-
-
-	if (vb->seed_key)
-		{
-		last_index = SRP_get_default_gN(NULL)->id;
-		}
-	for (i = 0; i < sk_OPENSSL_PSTRING_num(tmpdb->data); i++)
-		{
-		pp = sk_OPENSSL_PSTRING_value(tmpdb->data,i);
-		if (pp[DB_srptype][0] == DB_SRP_INDEX)
-			{
-			/*we add this couple in the internal Stack */
-
-			if ((gN = (SRP_gN *)OPENSSL_malloc(sizeof(SRP_gN))) == NULL) 
- 				goto err;
-
-			if  (!(gN->id = BUF_strdup(pp[DB_srpid]))
-	                ||  !(gN->N = SRP_gN_place_bn(vb->gN_cache,pp[DB_srpverifier]))
-			||  !(gN->g = SRP_gN_place_bn(vb->gN_cache,pp[DB_srpsalt]))
-			||  sk_SRP_gN_insert(SRP_gN_tab,gN,0) == 0)
-				goto err;
-
-			gN = NULL;
-
-			if (vb->seed_key != NULL)
-				{
-				last_index = pp[DB_srpid];
-				}
-			}
-		else if (pp[DB_srptype][0] == DB_SRP_VALID)
-			{
-			/* it is a user .... */
-			SRP_gN *lgN;
-			if ((lgN = SRP_get_gN_by_id(pp[DB_srpgN],SRP_gN_tab))!=NULL)
-				{
-				error_code = SRP_ERR_MEMORY;
-				if ((user_pwd = SRP_user_pwd_new()) == NULL) 
-					goto err;
-				
-				SRP_user_pwd_set_gN(user_pwd,lgN->g,lgN->N);
-				if (!SRP_user_pwd_set_ids(user_pwd, pp[DB_srpid],pp[DB_srpinfo]))
-					goto err;
-				
-				error_code = SRP_ERR_VBASE_BN_LIB;
-				if (!SRP_user_pwd_set_sv(user_pwd, pp[DB_srpsalt],pp[DB_srpverifier]))
-					goto err;
-
-				if (sk_SRP_user_pwd_insert(vb->users_pwd, user_pwd, 0) == 0)
-					goto err;
-				user_pwd = NULL; /* abandon responsability */
-				}
-			}
-		}
-	
-	if (last_index != NULL)
-		{
-		/* this means that we want to simulate a default user */
-
-		if (((gN = SRP_get_gN_by_id(last_index,SRP_gN_tab))==NULL))
-			{
-			error_code = SRP_ERR_VBASE_BN_LIB;
-			goto err;
-			}
-		vb->default_g = gN->g ;
-		vb->default_N = gN->N ;
-		gN = NULL ;
-		}
-	error_code = SRP_NO_ERROR;
-
- err:
-	/* there may be still some leaks to fix, if this fails, the application terminates most likely */
-
-	if (gN != NULL)
-		{
-		OPENSSL_free(gN->id);
-		OPENSSL_free(gN);
-		}
-
-	SRP_user_pwd_free(user_pwd);
-
-	if (tmpdb) TXT_DB_free(tmpdb);
-	if (in) BIO_free_all(in);
-
-	sk_SRP_gN_free(SRP_gN_tab);
-
-	return error_code;
-
-	}
-
-
-SRP_user_pwd *SRP_VBASE_get_by_user(SRP_VBASE *vb, char *username)
-	{
-	int i;
-	SRP_user_pwd *user;
-	unsigned char digv[SHA_DIGEST_LENGTH];
-	unsigned char digs[SHA_DIGEST_LENGTH];
-	EVP_MD_CTX ctxt;
-
-	if (vb == NULL)
-		return NULL;
-	for(i = 0; i < sk_SRP_user_pwd_num(vb->users_pwd); i++)
-		{
-		user = sk_SRP_user_pwd_value(vb->users_pwd, i);
-		if (strcmp(user->id,username)==0)
-			return user;
-		}
-	if ((vb->seed_key == NULL) ||
-		(vb->default_g == NULL) ||
-		(vb->default_N == NULL))
-		return NULL;
-
-/* if the user is unknown we set parameters as well if we have a seed_key */
-
-	if ((user = SRP_user_pwd_new()) == NULL) 
-		return NULL;
-
-	SRP_user_pwd_set_gN(user,vb->default_g,vb->default_N);
-				
-	if (!SRP_user_pwd_set_ids(user,username,NULL))
-		goto err;
-		
-	RAND_pseudo_bytes(digv, SHA_DIGEST_LENGTH);
-	EVP_MD_CTX_init(&ctxt);
-	EVP_DigestInit_ex(&ctxt, EVP_sha1(), NULL);
-	EVP_DigestUpdate(&ctxt, vb->seed_key, strlen(vb->seed_key));
-	EVP_DigestUpdate(&ctxt, username, strlen(username));
-	EVP_DigestFinal_ex(&ctxt, digs, NULL);
-	EVP_MD_CTX_cleanup(&ctxt);
-	if (SRP_user_pwd_set_sv_BN(user, BN_bin2bn(digs,SHA_DIGEST_LENGTH,NULL), BN_bin2bn(digv,SHA_DIGEST_LENGTH, NULL))) 
-		return user;
-
-err:    SRP_user_pwd_free(user);
-	return NULL;
-	}
-
-
-/*
-   create a verifier (*salt,*verifier,g and N are in base64)
-*/
-char *SRP_create_verifier(const char *user, const char *pass, char **salt,
-			  char **verifier, const char *N, const char *g)
-	{
-	int len;
-	char * result=NULL;
-	char *vf;
-	BIGNUM *N_bn = NULL, *g_bn = NULL, *s = NULL, *v = NULL;
-	unsigned char tmp[MAX_LEN];
-	unsigned char tmp2[MAX_LEN];
-	char * defgNid = NULL;
-
-	if ((user == NULL)||
-		(pass == NULL)||
-		(salt == NULL)||
-		(verifier == NULL))
-		goto err;
-
-	if (N)
-		{
-		if (!(len = t_fromb64(tmp, N))) goto err;
-		N_bn = BN_bin2bn(tmp, len, NULL);
-		if (!(len = t_fromb64(tmp, g))) goto err;
-		g_bn = BN_bin2bn(tmp, len, NULL);
-		defgNid = "*";
-		}
-	else
-		{ 
-		SRP_gN * gN = SRP_get_gN_by_id(g, NULL) ;
-		if (gN == NULL)
-			goto err;
-		N_bn = gN->N;
-		g_bn = gN->g;
-		defgNid = gN->id;
-		}
-
-	if (*salt == NULL)
-		{
-		RAND_pseudo_bytes(tmp2, SRP_RANDOM_SALT_LEN);
-
-		s = BN_bin2bn(tmp2, SRP_RANDOM_SALT_LEN, NULL);
-		}
-	else
-		{
-		if (!(len = t_fromb64(tmp2, *salt)))
-			goto err;
-		s = BN_bin2bn(tmp2, len, NULL);
-		}
-
-
-	if(!SRP_create_verifier_BN(user, pass, &s, &v, N_bn, g_bn)) goto err;
-
-	BN_bn2bin(v,tmp);
-	if (((vf = OPENSSL_malloc(BN_num_bytes(v)*2)) == NULL))
-		goto err;
-	t_tob64(vf, tmp, BN_num_bytes(v));
-
-	*verifier = vf;
-	if (*salt == NULL)
-		{
-		char *tmp_salt;
-
-		if ((tmp_salt = OPENSSL_malloc(SRP_RANDOM_SALT_LEN * 2)) == NULL)
-			{
-			OPENSSL_free(vf);
-			goto err;
-			}
-		t_tob64(tmp_salt, tmp2, SRP_RANDOM_SALT_LEN);
-		*salt = tmp_salt;
-		}
-
-	result=defgNid;
-
-err:
-	if(N)
-		{
-		BN_free(N_bn);
-		BN_free(g_bn);
-		}
-	return result;
-	}
-
-/*
-   create a verifier (*salt,*verifier,g and N are BIGNUMs)
-*/
-int SRP_create_verifier_BN(const char *user, const char *pass, BIGNUM **salt, BIGNUM **verifier, BIGNUM *N, BIGNUM *g)
-	{
-	int result=0;
-	BIGNUM *x = NULL;
-	BN_CTX *bn_ctx = BN_CTX_new();
-	unsigned char tmp2[MAX_LEN];
-
-	if ((user == NULL)||
-		(pass == NULL)||
-		(salt == NULL)||
-		(verifier == NULL)||
-		(N == NULL)||
-		(g == NULL)||
-		(bn_ctx == NULL))
-		goto err;
-
-	srp_bn_print(N);
-	srp_bn_print(g);
-
-	if (*salt == NULL)
-		{
-		RAND_pseudo_bytes(tmp2, SRP_RANDOM_SALT_LEN);
-
-		*salt = BN_bin2bn(tmp2,SRP_RANDOM_SALT_LEN,NULL);
-		}
-
-	x = SRP_Calc_x(*salt,user,pass);
-
-	*verifier = BN_new();
-	if(*verifier == NULL) goto err;
-
-	if (!BN_mod_exp(*verifier,g,x,N,bn_ctx))
-		{
-		BN_clear_free(*verifier);
-		goto err;
-		}
-
-	srp_bn_print(*verifier);
-
-	result=1;
-
-err:
-
-	BN_clear_free(x);
-	BN_CTX_free(bn_ctx);
-	return result;
-	}
-
-
-
-#endif