Check PKCS7 structures in PKCS#12 files are of type data.

[openssl.git] / crypto / pkcs12 / p12_key.c

diff --git a/crypto/pkcs12/p12_key.c b/crypto/pkcs12/p12_key.c
index b364671ed2264b3b8807daa67be37a7ef1640748..18e72d0a1b8188e06a76ffe24decd960603ef236 100644 (file)
--- a/crypto/pkcs12/p12_key.c
+++ b/crypto/pkcs12/p12_key.c
@@ -59,7 +59,7 @@
 #include <stdio.h>
 #include "cryptlib.h"
 #include <openssl/pkcs12.h>
-
+#include <openssl/bn.h>
 
 /* Uncomment out this line to get debugging info about key generation */
 /*#define DEBUG_KEYGEN*/
@@ -74,30 +74,35 @@ void h__dump (unsigned char *p, int len);
 #define min(a,b) ((a) < (b) ? (a) : (b))
 #endif
 
-int PKCS12_key_gen_asc (const char *pass, int passlen, unsigned char *salt,
+int PKCS12_key_gen_asc(const char *pass, int passlen, unsigned char *salt,
             int saltlen, int id, int iter, int n, unsigned char *out,
             const EVP_MD *md_type)
 {
        int ret;
        unsigned char *unipass;
        int uniplen;
-       if (!asc2uni (pass, &unipass, &uniplen)) {
+       if(!pass) {
+               unipass = NULL;
+               uniplen = 0;
+       } else if (!asc2uni(pass, passlen, &unipass, &uniplen)) {
                PKCS12err(PKCS12_F_PKCS12_KEY_GEN_ASC,ERR_R_MALLOC_FAILURE);
                return 0;
        }
-       ret = PKCS12_key_gen_uni (unipass, uniplen, salt, saltlen,
+       ret = PKCS12_key_gen_uni(unipass, uniplen, salt, saltlen,
                                                 id, iter, n, out, md_type);
-       memset(unipass, 0, uniplen);    /* Clear password from memory */
-       Free(unipass);
+       if(unipass) {
+               OPENSSL_cleanse(unipass, uniplen);      /* Clear password from memory */
+               OPENSSL_free(unipass);
+       }
        return ret;
 }
 
-int PKCS12_key_gen_uni (unsigned char *pass, int passlen, unsigned char *salt,
+int PKCS12_key_gen_uni(unsigned char *pass, int passlen, unsigned char *salt,
             int saltlen, int id, int iter, int n, unsigned char *out,
             const EVP_MD *md_type)
 {
        unsigned char *B, *D, *I, *p, *Ai;
-       int Slen, Plen, Ilen;
+       int Slen, Plen, Ilen, Ijlen;
        int i, j, u, v;
        BIGNUM *Ij, *Bpl1;      /* These hold Ij and B + 1 */
        EVP_MD_CTX ctx;
@@ -106,11 +111,14 @@ int PKCS12_key_gen_uni (unsigned char *pass, int passlen, unsigned char *salt,
        int tmpn = n;
 #endif
 
+#if 0
        if (!pass) {
                PKCS12err(PKCS12_F_PKCS12_KEY_GEN_UNI,ERR_R_PASSED_NULL_PARAMETER);
                return 0;
        }
+#endif
 
+       EVP_MD_CTX_init(&ctx);
 #ifdef  DEBUG_KEYGEN
        fprintf(stderr, "KEYGEN DEBUG\n");
        fprintf(stderr, "ID %d, ITER %d\n", id, iter);
@@ -121,13 +129,14 @@ int PKCS12_key_gen_uni (unsigned char *pass, int passlen, unsigned char *salt,
 #endif
        v = EVP_MD_block_size (md_type);
        u = EVP_MD_size (md_type);
-       D = Malloc (v);
-       Ai = Malloc (u);
-       B = Malloc (v + 1);
+       D = OPENSSL_malloc (v);
+       Ai = OPENSSL_malloc (u);
+       B = OPENSSL_malloc (v + 1);
        Slen = v * ((saltlen+v-1)/v);
-       Plen = v * ((passlen+v-1)/v);
+       if(passlen) Plen = v * ((passlen+v-1)/v);
+       else Plen = 0;
        Ilen = Slen + Plen;
-       I = Malloc (Ilen);
+       I = OPENSSL_malloc (Ilen);
        Ij = BN_new();
        Bpl1 = BN_new();
        if (!D || !Ai || !B || !I || !Ij || !Bpl1) {
@@ -139,23 +148,24 @@ int PKCS12_key_gen_uni (unsigned char *pass, int passlen, unsigned char *salt,
        for (i = 0; i < Slen; i++) *p++ = salt[i % saltlen];
        for (i = 0; i < Plen; i++) *p++ = pass[i % passlen];
        for (;;) {
-               EVP_DigestInit (&ctx, md_type);
-               EVP_DigestUpdate (&ctx, D, v);
-               EVP_DigestUpdate (&ctx, I, Ilen);
-               EVP_DigestFinal (&ctx, Ai, NULL);
+               EVP_DigestInit_ex(&ctx, md_type, NULL);
+               EVP_DigestUpdate(&ctx, D, v);
+               EVP_DigestUpdate(&ctx, I, Ilen);
+               EVP_DigestFinal_ex(&ctx, Ai, NULL);
                for (j = 1; j < iter; j++) {
-                       EVP_DigestInit (&ctx, md_type);
-                       EVP_DigestUpdate (&ctx, Ai, u);
-                       EVP_DigestFinal (&ctx, Ai, NULL);
+                       EVP_DigestInit_ex(&ctx, md_type, NULL);
+                       EVP_DigestUpdate(&ctx, Ai, u);
+                       EVP_DigestFinal_ex(&ctx, Ai, NULL);
                }
                memcpy (out, Ai, min (n, u));
                if (u >= n) {
-                       Free (Ai);
-                       Free (B);
-                       Free (D);
-                       Free (I);
+                       OPENSSL_free (Ai);
+                       OPENSSL_free (B);
+                       OPENSSL_free (D);
+                       OPENSSL_free (I);
                        BN_free (Ij);
                        BN_free (Bpl1);
+                       EVP_MD_CTX_cleanup(&ctx);
 #ifdef DEBUG_KEYGEN
                        fprintf(stderr, "Output KEY (length %d)\n", tmpn);
                        h__dump(tmpout, tmpn);
@@ -172,10 +182,17 @@ int PKCS12_key_gen_uni (unsigned char *pass, int passlen, unsigned char *salt,
                        BN_bin2bn (I + j, v, Ij);
                        BN_add (Ij, Ij, Bpl1);
                        BN_bn2bin (Ij, B);
+                       Ijlen = BN_num_bytes (Ij);
                        /* If more than 2^(v*8) - 1 cut off MSB */
-                       if (BN_num_bytes (Ij) > v) {
+                       if (Ijlen > v) {
                                BN_bn2bin (Ij, B);
                                memcpy (I + j, B + 1, v);
+#ifndef PKCS12_BROKEN_KEYGEN
+                       /* If less than v bytes pad with zeroes */
+                       } else if (Ijlen < v) {
+                               memset(I + j, 0, v - Ijlen);
+                               BN_bn2bin(Ij, I + j + v - Ijlen); 
+#endif
                        } else BN_bn2bin (Ij, I + j);
                }
        }