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-rw-r--r--crypto/asn1/a_int.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/crypto/asn1/a_int.c b/crypto/asn1/a_int.c
index 70c2b8e62c43..7e26704a5479 100644
--- a/crypto/asn1/a_int.c
+++ b/crypto/asn1/a_int.c
@@ -124,6 +124,8 @@ int i2c_ASN1_INTEGER(ASN1_INTEGER *a, unsigned char **pp)
else {
ret = a->length;
i = a->data[0];
+ if (ret == 1 && i == 0)
+ neg = 0;
if (!neg && (i > 127)) {
pad = 1;
pb = 0;
@@ -162,7 +164,7 @@ int i2c_ASN1_INTEGER(ASN1_INTEGER *a, unsigned char **pp)
p += a->length - 1;
i = a->length;
/* Copy zeros to destination as long as source is zero */
- while (!*n) {
+ while (!*n && i > 1) {
*(p--) = 0;
n--;
i--;
@@ -419,7 +421,7 @@ ASN1_INTEGER *BN_to_ASN1_INTEGER(const BIGNUM *bn, ASN1_INTEGER *ai)
ASN1err(ASN1_F_BN_TO_ASN1_INTEGER, ERR_R_NESTED_ASN1_ERROR);
goto err;
}
- if (BN_is_negative(bn))
+ if (BN_is_negative(bn) && !BN_is_zero(bn))
ret->type = V_ASN1_NEG_INTEGER;
else
ret->type = V_ASN1_INTEGER;