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-rw-r--r--crypto/asn1/a_verify.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/crypto/asn1/a_verify.c b/crypto/asn1/a_verify.c
index fc84cd3d191b..78dde1d05371 100644
--- a/crypto/asn1/a_verify.c
+++ b/crypto/asn1/a_verify.c
@@ -90,6 +90,12 @@ int ASN1_verify(i2d_of_void *i2d, X509_ALGOR *a, ASN1_BIT_STRING *signature,
ASN1err(ASN1_F_ASN1_VERIFY,ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM);
goto err;
}
+
+ if (signature->type == V_ASN1_BIT_STRING && signature->flags & 0x7)
+ {
+ ASN1err(ASN1_F_ASN1_VERIFY, ASN1_R_INVALID_BIT_STRING_BITS_LEFT);
+ goto err;
+ }
inl=i2d(data,NULL);
buf_in=OPENSSL_malloc((unsigned int)inl);
@@ -146,6 +152,12 @@ int ASN1_item_verify(const ASN1_ITEM *it, X509_ALGOR *a,
return -1;
}
+ if (signature->type == V_ASN1_BIT_STRING && signature->flags & 0x7)
+ {
+ ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ASN1_R_INVALID_BIT_STRING_BITS_LEFT);
+ return -1;
+ }
+
EVP_MD_CTX_init(&ctx);
/* Convert signature OID into digest and public key OIDs */