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Split PBES2 into cipher and PBKDF2 versions. This tidies the code somewhat

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and is a pre-requisite to adding password based CMS support.
This commit is contained in:
Dr. Stephen Henson 2009-11-25 22:01:06 +00:00
parent 451038b40c
commit 3d63b3966f
9 changed files with 165 additions and 91 deletions
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22
CHANGES
View File

@ -2,14 +2,12 @@
OpenSSL CHANGES
_______________
Changes between 0.9.8l and 1.0 [xx XXX xxxx]
Changes between 1.0 and 1.1 [xx XXX xxxx]
*) Add load_crls() function to apps tidying load_certs() too. Add option
to verify utility to allow additional CRLs to be included.
[Steve Henson]
*) Update OCSP request code to permit adding custom headers to the request:
some responders need this.
*) Split password based encryption into PBES2 and PBKDF2 functions. This
neatly separates the code into cipher and PBE sections and is required
for some algorithms that split PBES2 into separate pieces (such as
password based CMS).
[Steve Henson]
*) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where
@ -25,6 +23,16 @@
whose return value is often ignored.
[Steve Henson]
Changes between 0.9.8l and 1.0 [xx XXX xxxx]
*) Add load_crls() function to apps tidying load_certs() too. Add option
to verify utility to allow additional CRLs to be included.
[Steve Henson]
*) Update OCSP request code to permit adding custom headers to the request:
some responders need this.
[Steve Henson]
*) The function EVP_PKEY_sign() returns <=0 on error: check return code
correctly.
[Julia Lawall <julia@diku.dk>]

1
crypto/asn1/asn1.h
View File

@ -1266,6 +1266,7 @@ void ERR_load_ASN1_strings(void);
#define ASN1_F_PKCS5_PBE2_SET_IV 167
#define ASN1_F_PKCS5_PBE_SET 202
#define ASN1_F_PKCS5_PBE_SET0_ALGOR 215
#define ASN1_F_PKCS5_PBKDF2_SET 219
#define ASN1_F_SMIME_READ_ASN1 212
#define ASN1_F_SMIME_TEXT 213
#define ASN1_F_X509_CINF_NEW 168

1
crypto/asn1/asn1_err.c
View File

@ -179,6 +179,7 @@ static ERR_STRING_DATA ASN1_str_functs[]=
{ERR_FUNC(ASN1_F_PKCS5_PBE2_SET_IV), "PKCS5_pbe2_set_iv"},
{ERR_FUNC(ASN1_F_PKCS5_PBE_SET), "PKCS5_pbe_set"},
{ERR_FUNC(ASN1_F_PKCS5_PBE_SET0_ALGOR), "PKCS5_pbe_set0_algor"},
{ERR_FUNC(ASN1_F_PKCS5_PBKDF2_SET), "PKCS5_pbkdf2_set"},
{ERR_FUNC(ASN1_F_SMIME_READ_ASN1), "SMIME_read_ASN1"},
{ERR_FUNC(ASN1_F_SMIME_TEXT), "SMIME_text"},
{ERR_FUNC(ASN1_F_X509_CINF_NEW), "X509_CINF_NEW"},

142
crypto/asn1/p5_pbev2.c
View File

@ -91,12 +91,10 @@ X509_ALGOR *PKCS5_pbe2_set_iv(const EVP_CIPHER *cipher, int iter,
unsigned char *aiv, int prf_nid)
{
X509_ALGOR *scheme = NULL, *kalg = NULL, *ret = NULL;
int alg_nid;
int alg_nid, keylen;
EVP_CIPHER_CTX ctx;
unsigned char iv[EVP_MAX_IV_LENGTH];
PBKDF2PARAM *kdf = NULL;
PBE2PARAM *pbe2 = NULL;
ASN1_OCTET_STRING *osalt = NULL;
ASN1_OBJECT *obj;
alg_nid = EVP_CIPHER_type(cipher);
@ -146,55 +144,19 @@ X509_ALGOR *PKCS5_pbe2_set_iv(const EVP_CIPHER *cipher, int iter,
}
EVP_CIPHER_CTX_cleanup(&ctx);
if(!(kdf = PBKDF2PARAM_new())) goto merr;
if(!(osalt = M_ASN1_OCTET_STRING_new())) goto merr;
if (!saltlen) saltlen = PKCS5_SALT_LEN;
if (!(osalt->data = OPENSSL_malloc (saltlen))) goto merr;
osalt->length = saltlen;
if (salt) memcpy (osalt->data, salt, saltlen);
else if (RAND_pseudo_bytes (osalt->data, saltlen) < 0) goto merr;
if(iter <= 0) iter = PKCS5_DEFAULT_ITER;
if(!ASN1_INTEGER_set(kdf->iter, iter)) goto merr;
/* Now include salt in kdf structure */
kdf->salt->value.octet_string = osalt;
kdf->salt->type = V_ASN1_OCTET_STRING;
osalt = NULL;
/* If its RC2 then we'd better setup the key length */
if(alg_nid == NID_rc2_cbc) {
if(!(kdf->keylength = M_ASN1_INTEGER_new())) goto merr;
if(!ASN1_INTEGER_set (kdf->keylength,
EVP_CIPHER_key_length(cipher))) goto merr;
}
if(alg_nid == NID_rc2_cbc)
keylen = EVP_CIPHER_key_length(cipher);
else
keylen = -1;
/* prf can stay NULL if we are using hmacWithSHA1 */
if (prf_nid != NID_hmacWithSHA1)
{
kdf->prf = X509_ALGOR_new();
if (!kdf->prf)
/* Setup keyfunc */
pbe2->keyfunc = PKCS5_pbkdf2_set(iter, salt, saltlen, prf_nid, keylen);
if (!pbe2->keyfunc)
goto merr;
X509_ALGOR_set0(kdf->prf, OBJ_nid2obj(prf_nid),
V_ASN1_NULL, NULL);
}
/* Now setup the PBE2PARAM keyfunc structure */
pbe2->keyfunc->algorithm = OBJ_nid2obj(NID_id_pbkdf2);
/* Encode PBKDF2PARAM into parameter of pbe2 */
if(!(pbe2->keyfunc->parameter = ASN1_TYPE_new())) goto merr;
if(!ASN1_item_pack(kdf, ASN1_ITEM_rptr(PBKDF2PARAM),
&pbe2->keyfunc->parameter->value.sequence)) goto merr;
pbe2->keyfunc->parameter->type = V_ASN1_SEQUENCE;
PBKDF2PARAM_free(kdf);
kdf = NULL;
/* Now set up top level AlgorithmIdentifier */
@ -220,8 +182,6 @@ X509_ALGOR *PKCS5_pbe2_set_iv(const EVP_CIPHER *cipher, int iter,
err:
PBE2PARAM_free(pbe2);
/* Note 'scheme' is freed as part of pbe2 */
M_ASN1_OCTET_STRING_free(osalt);
PBKDF2PARAM_free(kdf);
X509_ALGOR_free(kalg);
X509_ALGOR_free(ret);
@ -234,3 +194,85 @@ X509_ALGOR *PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter,
{
return PKCS5_pbe2_set_iv(cipher, iter, salt, saltlen, NULL, -1);
}
X509_ALGOR *PKCS5_pbkdf2_set(int iter, unsigned char *salt, int saltlen,
int prf_nid, int keylen)
{
X509_ALGOR *keyfunc = NULL;
PBKDF2PARAM *kdf = NULL;
ASN1_OCTET_STRING *osalt = NULL;
if(!(kdf = PBKDF2PARAM_new()))
goto merr;
if(!(osalt = M_ASN1_OCTET_STRING_new()))
goto merr;
kdf->salt->value.octet_string = osalt;
kdf->salt->type = V_ASN1_OCTET_STRING;
if (!saltlen)
saltlen = PKCS5_SALT_LEN;
if (!(osalt->data = OPENSSL_malloc (saltlen)))
goto merr;
osalt->length = saltlen;
if (salt)
memcpy (osalt->data, salt, saltlen);
else if (RAND_pseudo_bytes (osalt->data, saltlen) < 0)
goto merr;
if(iter <= 0)
iter = PKCS5_DEFAULT_ITER;
if(!ASN1_INTEGER_set(kdf->iter, iter))
goto merr;
/* If have a key len set it up */
if(keylen > 0)
{
if(!(kdf->keylength = M_ASN1_INTEGER_new()))
goto merr;
if(!ASN1_INTEGER_set (kdf->keylength, keylen))
goto merr;
}
/* prf can stay NULL if we are using hmacWithSHA1 */
if (prf_nid > 0 && prf_nid != NID_hmacWithSHA1)
{
kdf->prf = X509_ALGOR_new();
if (!kdf->prf)
goto merr;
X509_ALGOR_set0(kdf->prf, OBJ_nid2obj(prf_nid),
V_ASN1_NULL, NULL);
}
/* Finally setup the keyfunc structure */
keyfunc = X509_ALGOR_new();
if (!keyfunc)
goto merr;
keyfunc->algorithm = OBJ_nid2obj(NID_id_pbkdf2);
/* Encode PBKDF2PARAM into parameter of pbe2 */
if(!(keyfunc->parameter = ASN1_TYPE_new()))
goto merr;
if(!ASN1_item_pack(kdf, ASN1_ITEM_rptr(PBKDF2PARAM),
&keyfunc->parameter->value.sequence))
goto merr;
keyfunc->parameter->type = V_ASN1_SEQUENCE;
PBKDF2PARAM_free(kdf);
return keyfunc;
merr:
ASN1err(ASN1_F_PKCS5_PBKDF2_SET,ERR_R_MALLOC_FAILURE);
PBKDF2PARAM_free(kdf);
X509_ALGOR_free(keyfunc);
return NULL;
}

1
crypto/evp/evp.h
View File

@ -1236,6 +1236,7 @@ void ERR_load_EVP_strings(void);
#define EVP_F_INT_CTX_NEW 157
#define EVP_F_PKCS5_PBE_KEYIVGEN 117
#define EVP_F_PKCS5_V2_PBE_KEYIVGEN 118
#define EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN 164
#define EVP_F_PKCS8_SET_BROKEN 112
#define EVP_F_PKEY_SET_TYPE 158
#define EVP_F_RC2_MAGIC_TO_METH 109

1
crypto/evp/evp_err.c
View File

@ -129,6 +129,7 @@ static ERR_STRING_DATA EVP_str_functs[]=
{ERR_FUNC(EVP_F_INT_CTX_NEW), "INT_CTX_NEW"},
{ERR_FUNC(EVP_F_PKCS5_PBE_KEYIVGEN), "PKCS5_PBE_keyivgen"},
{ERR_FUNC(EVP_F_PKCS5_V2_PBE_KEYIVGEN), "PKCS5_v2_PBE_keyivgen"},
{ERR_FUNC(EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN), "PKCS5_V2_PBKDF2_KEYIVGEN"},
{ERR_FUNC(EVP_F_PKCS8_SET_BROKEN), "PKCS8_set_broken"},
{ERR_FUNC(EVP_F_PKEY_SET_TYPE), "PKEY_SET_TYPE"},
{ERR_FUNC(EVP_F_RC2_MAGIC_TO_METH), "RC2_MAGIC_TO_METH"},

4
crypto/evp/evp_locl.h
View File

@ -343,3 +343,7 @@ struct evp_pkey_method_st
} /* EVP_PKEY_METHOD */;
void evp_pkey_set_cb_translate(BN_GENCB *cb, EVP_PKEY_CTX *ctx);
int PKCS5_v2_PBKDF2_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass, int passlen,
ASN1_TYPE *param,
const EVP_CIPHER *c, const EVP_MD *md, int en_de);

5
crypto/evp/evp_pbe.c
View File

@ -61,6 +61,7 @@
#include <openssl/evp.h>
#include <openssl/pkcs12.h>
#include <openssl/x509.h>
#include "evp_locl.h"
/* Password based encryption (PBE) functions */
@ -87,6 +88,10 @@ static const EVP_PBE_CTL builtin_pbe[] =
{EVP_PBE_TYPE_OUTER, NID_pbeWithSHA1AndRC2_CBC,
NID_rc2_64_cbc, NID_sha1, PKCS5_PBE_keyivgen},
#ifndef OPENSSL_NO_HMAC
{EVP_PBE_TYPE_OUTER, NID_id_pbkdf2, -1, -1, PKCS5_v2_PBKDF2_keyivgen},
#endif
{EVP_PBE_TYPE_OUTER, NID_pbe_WithSHA1And128BitRC4,
NID_rc4, NID_sha1, PKCS12_PBE_keyivgen},
{EVP_PBE_TYPE_OUTER, NID_pbe_WithSHA1And40BitRC4,

81
crypto/evp/p5_crpt2.c
View File

@ -62,6 +62,7 @@
#include <openssl/x509.h>
#include <openssl/evp.h>
#include <openssl/hmac.h>
#include "evp_locl.h"
/* set this to print out info about the keygen algorithm */
/* #define DEBUG_PKCS5V2 */
@ -172,27 +173,24 @@ int PKCS5_v2_PBE_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass, int passlen,
ASN1_TYPE *param, const EVP_CIPHER *c, const EVP_MD *md,
int en_de)
{
unsigned char *salt, key[EVP_MAX_KEY_LENGTH];
const unsigned char *pbuf;
int saltlen, iter, plen;
unsigned int keylen;
int plen;
PBE2PARAM *pbe2 = NULL;
const EVP_CIPHER *cipher;
PBKDF2PARAM *kdf = NULL;
const EVP_MD *prfmd;
int prf_nid, hmac_md_nid;
int rv = 0;
if (param == NULL || param->type != V_ASN1_SEQUENCE ||
param->value.sequence == NULL) {
EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN,EVP_R_DECODE_ERROR);
return 0;
goto err;
}
pbuf = param->value.sequence->data;
plen = param->value.sequence->length;
if(!(pbe2 = d2i_PBE2PARAM(NULL, &pbuf, plen))) {
EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN,EVP_R_DECODE_ERROR);
return 0;
goto err;
}
/* See if we recognise the key derivation function */
@ -216,41 +214,62 @@ int PKCS5_v2_PBE_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass, int passlen,
/* Fixup cipher based on AlgorithmIdentifier */
if (!EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, en_de))
{
EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN, ERR_R_EVP_LIB);
goto err;
}
if(EVP_CIPHER_asn1_to_param(ctx, pbe2->encryption->parameter) < 0) {
EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN,
EVP_R_CIPHER_PARAMETER_ERROR);
goto err;
}
rv = PKCS5_v2_PBKDF2_keyivgen(ctx, pass, passlen,
pbe2->keyfunc->parameter, c, md, en_de);
err:
PBE2PARAM_free(pbe2);
return rv;
}
int PKCS5_v2_PBKDF2_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass, int passlen,
ASN1_TYPE *param,
const EVP_CIPHER *c, const EVP_MD *md, int en_de)
{
unsigned char *salt, key[EVP_MAX_KEY_LENGTH];
const unsigned char *pbuf;
int saltlen, iter, plen;
int rv = 0;
unsigned int keylen;
int prf_nid, hmac_md_nid;
PBKDF2PARAM *kdf = NULL;
const EVP_MD *prfmd;
if (EVP_CIPHER_CTX_cipher(ctx) == NULL)
{
EVPerr(EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN,EVP_R_NO_CIPHER_SET);
goto err;
}
keylen = EVP_CIPHER_CTX_key_length(ctx);
OPENSSL_assert(keylen <= sizeof key);
/* Now decode key derivation function */
/* Decode parameter */
if(!pbe2->keyfunc->parameter ||
(pbe2->keyfunc->parameter->type != V_ASN1_SEQUENCE))
if(!param || (param->type != V_ASN1_SEQUENCE))
{
EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN,EVP_R_DECODE_ERROR);
EVPerr(EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN,EVP_R_DECODE_ERROR);
goto err;
}
pbuf = pbe2->keyfunc->parameter->value.sequence->data;
plen = pbe2->keyfunc->parameter->value.sequence->length;
pbuf = param->value.sequence->data;
plen = param->value.sequence->length;
if(!(kdf = d2i_PBKDF2PARAM(NULL, &pbuf, plen)) ) {
EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN,EVP_R_DECODE_ERROR);
EVPerr(EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN,EVP_R_DECODE_ERROR);
goto err;
}
PBE2PARAM_free(pbe2);
pbe2 = NULL;
keylen = EVP_CIPHER_CTX_key_length(ctx);
/* Now check the parameters of the kdf */
if(kdf->keylength && (ASN1_INTEGER_get(kdf->keylength) != (int)keylen)){
EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN,
EVPerr(EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN,
EVP_R_UNSUPPORTED_KEYLENGTH);
goto err;
}
@ -262,19 +281,19 @@ int PKCS5_v2_PBE_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass, int passlen,
if (!EVP_PBE_find(EVP_PBE_TYPE_PRF, prf_nid, NULL, &hmac_md_nid, 0))
{
EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN, EVP_R_UNSUPPORTED_PRF);
EVPerr(EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN, EVP_R_UNSUPPORTED_PRF);
goto err;
}
prfmd = EVP_get_digestbynid(hmac_md_nid);
if (prfmd == NULL)
{
EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN, EVP_R_UNSUPPORTED_PRF);
EVPerr(EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN, EVP_R_UNSUPPORTED_PRF);
goto err;
}
if(kdf->salt->type != V_ASN1_OCTET_STRING) {
EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN,
EVPerr(EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN,
EVP_R_UNSUPPORTED_SALT_TYPE);
goto err;
}
@ -286,19 +305,11 @@ int PKCS5_v2_PBE_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass, int passlen,
if(!PKCS5_PBKDF2_HMAC(pass, passlen, salt, saltlen, iter, prfmd,
keylen, key))
goto err;
if (!EVP_CipherInit_ex(ctx, NULL, NULL, key, NULL, en_de))
{
EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN, ERR_R_EVP_LIB);
goto err;
}
rv = EVP_CipherInit_ex(ctx, NULL, NULL, key, NULL, en_de);
err:
OPENSSL_cleanse(key, keylen);
PBKDF2PARAM_free(kdf);
return 1;
err:
PBE2PARAM_free(pbe2);
PBKDF2PARAM_free(kdf);
return 0;
return rv;
}
#ifdef DEBUG_PKCS5V2