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Add accurate asn.1 siganture/ciphertext size

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This commit is contained in:
Zhi Guan
2018-12-04 15:56:21 +08:00
parent c0ee87b077
commit bc2bb8a335
13 changed files with 5628 additions and 131 deletions
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48
crypto/sm2/sm2_asn1.c
View File

@@ -67,8 +67,50 @@ ASN1_SEQUENCE(SM2CiphertextValue) = {
IMPLEMENT_ASN1_FUNCTIONS(SM2CiphertextValue)
IMPLEMENT_ASN1_DUP_FUNCTION(SM2CiphertextValue)
int SM2CiphertextValue_size(const EC_GROUP *group, int inlen)
int SM2CiphertextValue_size(const EC_GROUP *group, size_t inlen)
{
return 1024;
}
int ret;
ASN1_OCTET_STRING s;
int len = 0, i;
if (inlen > SM2_MAX_PLAINTEXT_LENGTH) {
SM2err(SM2_F_SM2CIPHERTEXTVALUE_SIZE, SM2_R_PLAINTEXT_TOO_LONG);
return 0;
}
if (group) {
ASN1_INTEGER a;
unsigned char buf[4] = {0xff};
/* ASN1_INTEGER xCoordinate, yCoordinate */
if (!(i = EC_GROUP_order_bits(group))) {
SM2err(SM2_F_SM2CIPHERTEXTVALUE_SIZE, ERR_R_EC_LIB);
return 0;
}
a.length = (i + 7)/8;
a.data = buf;
a.type = V_ASN1_INTEGER;
i = i2d_ASN1_INTEGER(&a, NULL);
len = i + i;
/* ASN1_OCTET_STRING hash 32 */
s.length = SM3_DIGEST_LENGTH;
s.data = NULL;
s.type = V_ASN1_OCTET_STRING;
i = i2d_ASN1_OCTET_STRING(&s, NULL);
len += i;
} else {
len += 104;
}
/* ASN1_OCTET_STRING ciphertext inlen */
s.length = inlen;
s.data = NULL;
s.type = V_ASN1_OCTET_STRING;
i = i2d_ASN1_OCTET_STRING(&s, NULL);
len += i;
ret = ASN1_object_size(1, len, V_ASN1_SEQUENCE);
return ret;
}

4
crypto/sm2/sm2_err.c
View File

@@ -1,6 +1,6 @@
/*
* Generated by util/mkerr.pl DO NOT EDIT
* Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
* Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
@@ -21,6 +21,7 @@
static ERR_STRING_DATA SM2_str_functs[] = {
{ERR_FUNC(SM2_F_I2O_SM2CIPHERTEXTVALUE), "i2o_SM2CiphertextValue"},
{ERR_FUNC(SM2_F_O2I_SM2CIPHERTEXTVALUE), "o2i_SM2CiphertextValue"},
{ERR_FUNC(SM2_F_SM2CIPHERTEXTVALUE_SIZE), "SM2CiphertextValue_size"},
{ERR_FUNC(SM2_F_SM2_DECRYPT), "SM2_decrypt"},
{ERR_FUNC(SM2_F_SM2_DO_DECRYPT), "SM2_do_decrypt"},
{ERR_FUNC(SM2_F_SM2_DO_ENCRYPT), "SM2_do_encrypt"},
@@ -45,6 +46,7 @@ static ERR_STRING_DATA SM2_str_reasons[] = {
{ERR_REASON(SM2_R_KDF_FAILURE), "kdf failure"},
{ERR_REASON(SM2_R_MISSING_PARAMETERS), "missing parameters"},
{ERR_REASON(SM2_R_NEED_NEW_SETUP_VALUES), "need new setup values"},
{ERR_REASON(SM2_R_PLAINTEXT_TOO_LONG), "plaintext too long"},
{ERR_REASON(SM2_R_RANDOM_NUMBER_GENERATION_FAILED),
"random number generation failed"},
{0, NULL}