X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=crypto%2Fevp%2Fp5_crpt.c;h=294cc90d878c19f98466d411048fecb1beab82e8;hb=701d593f7095db84459c76265349a83d30a4cae5;hp=11bf88b96d84e64bb23e7622ef6dda4855748b63;hpb=ef8335d900ee5af9d83237ad29d6904a3bb69290;p=oweals%2Fopenssl.git

diff --git a/crypto/evp/p5_crpt.c b/crypto/evp/p5_crpt.c
index 11bf88b96d..294cc90d87 100644
--- 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.
  */
 /* ====================================================================
@@ -58,51 +58,86 @@
 
 #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 NO_DES
-EVP_PBE_alg_add(NID_pbeWithMD5AndDES_CBC, EVP_des_cbc(), EVP_md5(),
-							 PKCS5_PBE_keyivgen);
-EVP_PBE_alg_add(NID_pbeWithMD2AndDES_CBC, EVP_des_cbc(), EVP_md2(),
-							 PKCS5_PBE_keyivgen);
-EVP_PBE_alg_add(NID_pbeWithSHA1AndDES_CBC, EVP_des_cbc(), EVP_sha1(),
-							 PKCS5_PBE_keyivgen);
-#endif
-#ifndef NO_RC2
-EVP_PBE_alg_add(NID_pbeWithMD5AndRC2_CBC, EVP_rc2_64_cbc(), EVP_md5(),
-							 PKCS5_PBE_keyivgen);
-EVP_PBE_alg_add(NID_pbeWithMD2AndRC2_CBC, EVP_rc2_64_cbc(), EVP_md2(),
-							 PKCS5_PBE_keyivgen);
-EVP_PBE_alg_add(NID_pbeWithSHA1AndRC2_CBC, EVP_rc2_64_cbc(), EVP_sha1(),
-							 PKCS5_PBE_keyivgen);
-#endif
 }
 
-int PKCS5_PBE_keyivgen(const char *pass, int passlen, unsigned char *salt,
-			 int saltlen, int iter, EVP_CIPHER *cipher, EVP_MD *md,
-			 unsigned char *key, unsigned char *iv)
+int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *cctx, const char *pass, int passlen,
+			 ASN1_TYPE *param, const EVP_CIPHER *cipher, const EVP_MD *md,
+			 int en_de)
 {
 	EVP_MD_CTX ctx;
 	unsigned char md_tmp[EVP_MAX_MD_SIZE];
+	unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
 	int i;
-	EVP_DigestInit (&ctx, md);
-	EVP_DigestUpdate (&ctx, pass, passlen);
-	EVP_DigestUpdate (&ctx, salt, saltlen);
-	EVP_DigestFinal (&ctx, md_tmp, NULL);
+	PBEPARAM *pbe;
+	int saltlen, iter;
+	unsigned char *salt;
+	const unsigned char *pbuf;
+	int mdsize;
+	int rv = 0;
+	EVP_MD_CTX_init(&ctx);
+
+	/* 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 (!(pbe = d2i_PBEPARAM(NULL, &pbuf, param->value.sequence->length))) {
+		EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN,EVP_R_DECODE_ERROR);
+		return 0;
+	}
+
+	if (!pbe->iter) iter = 1;
+	else iter = ASN1_INTEGER_get (pbe->iter);
+	salt = pbe->salt->data;
+	saltlen = pbe->salt->length;
+
+	if(!pass) passlen = 0;
+	else if(passlen == -1) passlen = strlen(pass);
+
+	if (!EVP_DigestInit_ex(&ctx, md, NULL))
+		goto err;
+	if (!EVP_DigestUpdate(&ctx, pass, passlen))
+		goto err;
+	if (!EVP_DigestUpdate(&ctx, salt, saltlen))
+		goto err;
+	PBEPARAM_free(pbe);
+	if (!EVP_DigestFinal_ex(&ctx, md_tmp, NULL))
+		goto err;
+	mdsize = EVP_MD_size(md);
+	if (mdsize < 0)
+	    return 0;
 	for (i = 1; i < iter; i++) {
-		EVP_DigestInit(&ctx, md);
-		EVP_DigestUpdate(&ctx, md_tmp, EVP_MD_size(md));
-		EVP_DigestFinal (&ctx, md_tmp, NULL);
+		if (!EVP_DigestInit_ex(&ctx, md, NULL))
+			goto err;
+		if (!EVP_DigestUpdate(&ctx, md_tmp, mdsize))
+			goto err;
+		if (!EVP_DigestFinal_ex (&ctx, md_tmp, NULL))
+			goto err;
 	}
-	memcpy (key, md_tmp, EVP_CIPHER_key_length(cipher));
-	memcpy (iv, md_tmp + (16 - EVP_CIPHER_iv_length(cipher)),
+	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));
-	return 1;
+	if (!EVP_CipherInit_ex(cctx, cipher, NULL, key, iv, en_de))
+		goto err;
+	OPENSSL_cleanse(md_tmp, EVP_MAX_MD_SIZE);
+	OPENSSL_cleanse(key, EVP_MAX_KEY_LENGTH);
+	OPENSSL_cleanse(iv, EVP_MAX_IV_LENGTH);
+	rv = 1;
+	err:
+	EVP_MD_CTX_cleanup(&ctx);
+	return rv;
 }