1 files changed, 657 insertions, 0 deletions

diff --git a/src/lib/libcrypto/srp/srp_vfy.c b/src/lib/libcrypto/srp/srp_vfy.c
new file mode 100644
index 0000000000..c8be907d7f
--- /dev/null
+++ b/src/lib/libcrypto/srp/srp_vfy.c
@@ -0,0 +1,657 @@
+/* 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 = (char **)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 = (char *)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