If we're going to return errors (no matter how stupid), then we should

[openssl.git] / crypto / evp / p5_crpt.c

diff --git a/crypto/evp/p5_crpt.c b/crypto/evp/p5_crpt.c
index cbe904d4953081896d496bbfe309c4725d233915..7ecfa8dad97a43615c2b6b13049ac18ecbb832b8 100644 (file)
--- a/crypto/evp/p5_crpt.c
+++ b/crypto/evp/p5_crpt.c
@@ -1,5 +1,5 @@
 /* p5_crpt.c */
-/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
+/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
  * project 1999.
  */
 /* ====================================================================
@@ -58,46 +58,15 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include "cryptlib.h"
 #include <openssl/x509.h>
 #include <openssl/evp.h>
-#include "cryptlib.h"
 
-/* PKCS#5 v1.5 compatible PBE functions: see PKCS#5 v2.0 for more info.
+/* Doesn't do anything now: Builtin PBE algorithms in static table.
  */
 
 void PKCS5_PBE_add(void)
 {
-#ifndef OPENSSL_NO_DES
-#  ifndef OPENSSL_NO_MD5
-EVP_PBE_alg_add(NID_pbeWithMD5AndDES_CBC, EVP_des_cbc(), EVP_md5(),
-                                                        PKCS5_PBE_keyivgen);
-#  endif
-#  ifndef OPENSSL_NO_MD2
-EVP_PBE_alg_add(NID_pbeWithMD2AndDES_CBC, EVP_des_cbc(), EVP_md2(),
-                                                        PKCS5_PBE_keyivgen);
-#  endif
-#  ifndef OPENSSL_NO_SHA
-EVP_PBE_alg_add(NID_pbeWithSHA1AndDES_CBC, EVP_des_cbc(), EVP_sha1(),
-                                                        PKCS5_PBE_keyivgen);
-#  endif
-#endif
-#ifndef OPENSSL_NO_RC2
-#  ifndef OPENSSL_NO_MD5
-EVP_PBE_alg_add(NID_pbeWithMD5AndRC2_CBC, EVP_rc2_64_cbc(), EVP_md5(),
-                                                        PKCS5_PBE_keyivgen);
-#  endif
-#  ifndef OPENSSL_NO_MD2
-EVP_PBE_alg_add(NID_pbeWithMD2AndRC2_CBC, EVP_rc2_64_cbc(), EVP_md2(),
-                                                        PKCS5_PBE_keyivgen);
-#  endif
-#  ifndef OPENSSL_NO_SHA
-EVP_PBE_alg_add(NID_pbeWithSHA1AndRC2_CBC, EVP_rc2_64_cbc(), EVP_sha1(),
-                                                        PKCS5_PBE_keyivgen);
-#  endif
-#endif
-#ifndef OPENSSL_NO_HMAC
-EVP_PBE_alg_add(NID_pbes2, NULL, NULL, PKCS5_v2_PBE_keyivgen);
-#endif
 }
 
 int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *cctx, const char *pass, int passlen,
@@ -110,12 +79,19 @@ int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *cctx, const char *pass, int passlen,
        int i;
        PBEPARAM *pbe;
        int saltlen, iter;
-       unsigned char *salt, *pbuf;
+       unsigned char *salt;
+       const unsigned char *pbuf;
+       int mdsize;
 
        /* Extract useful info from parameter */
+       if (param == NULL || param->type != V_ASN1_SEQUENCE ||
+           param->value.sequence == NULL) {
+               EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN,EVP_R_DECODE_ERROR);
+               return 0;
+       }
+
        pbuf = param->value.sequence->data;
-       if (!param || (param->type != V_ASN1_SEQUENCE) ||
-          !(pbe = d2i_PBEPARAM (NULL, &pbuf, param->value.sequence->length))) {
+       if (!(pbe = d2i_PBEPARAM(NULL, &pbuf, param->value.sequence->length))) {
                EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN,EVP_R_DECODE_ERROR);
                return 0;
        }
@@ -134,18 +110,23 @@ int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *cctx, const char *pass, int passlen,
        EVP_DigestUpdate(&ctx, salt, saltlen);
        PBEPARAM_free(pbe);
        EVP_DigestFinal_ex(&ctx, md_tmp, NULL);
+       mdsize = EVP_MD_size(md);
+       if (mdsize < 0)
+           return 0;
        for (i = 1; i < iter; i++) {
                EVP_DigestInit_ex(&ctx, md, NULL);
-               EVP_DigestUpdate(&ctx, md_tmp, EVP_MD_size(md));
+               EVP_DigestUpdate(&ctx, md_tmp, mdsize);
                EVP_DigestFinal_ex (&ctx, md_tmp, NULL);
        }
        EVP_MD_CTX_cleanup(&ctx);
+       OPENSSL_assert(EVP_CIPHER_key_length(cipher) <= (int)sizeof(md_tmp));
        memcpy(key, md_tmp, EVP_CIPHER_key_length(cipher));
+       OPENSSL_assert(EVP_CIPHER_iv_length(cipher) <= 16);
        memcpy(iv, md_tmp + (16 - EVP_CIPHER_iv_length(cipher)),
                                                 EVP_CIPHER_iv_length(cipher));
-       EVP_CipherInit(cctx, cipher, key, iv, en_de);
-       memset(md_tmp, 0, EVP_MAX_MD_SIZE);
-       memset(key, 0, EVP_MAX_KEY_LENGTH);
-       memset(iv, 0, EVP_MAX_IV_LENGTH);
+       EVP_CipherInit_ex(cctx, cipher, NULL, key, iv, en_de);
+       OPENSSL_cleanse(md_tmp, EVP_MAX_MD_SIZE);
+       OPENSSL_cleanse(key, EVP_MAX_KEY_LENGTH);
+       OPENSSL_cleanse(iv, EVP_MAX_IV_LENGTH);
        return 1;
 }