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Import OpenSSL 1.0.2p

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This commit is contained in:
Steve Dower
2018-08-14 08:51:39 -07:00
parent 4933cd8231
commit 4b1c388f4d
157 changed files with 2471 additions and 1482 deletions
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62
crypto/rsa/rsa_pk1.c
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@@ -98,6 +98,27 @@ int RSA_padding_check_PKCS1_type_1(unsigned char *to, int tlen,
const unsigned char *p;
p = from;
/*
* The format is
* 00 || 01 || PS || 00 || D
* PS - padding string, at least 8 bytes of FF
* D - data.
*/
if (num < 11)
return -1;
/* Accept inputs with and without the leading 0-byte. */
if (num == flen) {
if ((*p++) != 0x00) {
RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1,
RSA_R_INVALID_PADDING);
return -1;
}
flen--;
}
if ((num != (flen + 1)) || (*(p++) != 01)) {
RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1,
RSA_R_BLOCK_TYPE_IS_NOT_01);
@@ -203,28 +224,31 @@ int RSA_padding_check_PKCS1_type_2(unsigned char *to, int tlen,
if (num < 11)
goto err;
em = OPENSSL_malloc(num);
if (em == NULL) {
RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_2, ERR_R_MALLOC_FAILURE);
return -1;
if (flen != num) {
em = OPENSSL_malloc(num);
if (em == NULL) {
RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_2, ERR_R_MALLOC_FAILURE);
return -1;
}
/*
* Caller is encouraged to pass zero-padded message created with
* BN_bn2binpad, but if it doesn't, we do this zero-padding copy
* to avoid leaking that information. The copy still leaks some
* side-channel information, but it's impossible to have a fixed
* memory access pattern since we can't read out of the bounds of
* |from|.
*/
memset(em, 0, num);
memcpy(em + num - flen, from, flen);
from = em;
}
memset(em, 0, num);
/*
* Always do this zero-padding copy (even when num == flen) to avoid
* leaking that information. The copy still leaks some side-channel
* information, but it's impossible to have a fixed memory access
* pattern since we can't read out of the bounds of |from|.
*
* TODO(emilia): Consider porting BN_bn2bin_padded from BoringSSL.
*/
memcpy(em + num - flen, from, flen);
good = constant_time_is_zero(em[0]);
good &= constant_time_eq(em[1], 2);
good = constant_time_is_zero(from[0]);
good &= constant_time_eq(from[1], 2);
found_zero_byte = 0;
for (i = 2; i < num; i++) {
unsigned int equals0 = constant_time_is_zero(em[i]);
unsigned int equals0 = constant_time_is_zero(from[i]);
zero_index =
constant_time_select_int(~found_zero_byte & equals0, i,
zero_index);
@@ -232,7 +256,7 @@ int RSA_padding_check_PKCS1_type_2(unsigned char *to, int tlen,
}
/*
* PS must be at least 8 bytes long, and it starts two bytes into |em|.
* PS must be at least 8 bytes long, and it starts two bytes into |from|.
* If we never found a 0-byte, then |zero_index| is 0 and the check
* also fails.
*/
@@ -261,7 +285,7 @@ int RSA_padding_check_PKCS1_type_2(unsigned char *to, int tlen,
goto err;
}
memcpy(to, em + msg_index, mlen);
memcpy(to, from + msg_index, mlen);
err:
if (em != NULL) {