Remove ASN1_BIT_STRING_check

This was added with the TS code for no discernible reason. I could not
find a single consumer. In the unlikely event that you need this, it is
easy enough to write a better version of it yourself.

ok jsing

2 files changed, 2 insertions, 31 deletions

diff --git a/src/lib/libcrypto/asn1/a_bitstr.c b/src/lib/libcrypto/asn1/a_bitstr.c
index 8076723de8..b985db60da 100644
--- a/src/lib/libcrypto/asn1/a_bitstr.c
+++ b/src/lib/libcrypto/asn1/a_bitstr.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: a_bitstr.c,v 1.39 2023/07/05 21:23:36 beck Exp $ */
+/* $OpenBSD: a_bitstr.c,v 1.40 2023/07/28 10:30:16 tb Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -162,33 +162,6 @@ ASN1_BIT_STRING_get_bit(const ASN1_BIT_STRING *a, int n)
 }
 LCRYPTO_ALIAS(ASN1_BIT_STRING_get_bit);
 
-/*
- * Checks if the given bit string contains only bits specified by
- * the flags vector. Returns 0 if there is at least one bit set in 'a'
- * which is not specified in 'flags', 1 otherwise.
- * 'len' is the length of 'flags'.
- */
-int
-ASN1_BIT_STRING_check(const ASN1_BIT_STRING *a, const unsigned char *flags,
-    int flags_len)
-{
-        int i, ok;
-
-        /* Check if there is one bit set at all. */
-        if (!a || !a->data)
-                return 1;
-
-        /* Check each byte of the internal representation of the bit string. */
-        ok = 1;
-        for (i = 0; i < a->length && ok; ++i) {
-                unsigned char mask = i < flags_len ? ~flags[i] : 0xff;
-                /* We are done if there is an unneeded bit set. */
-                ok = (a->data[i] & mask) == 0;
-        }
-        return ok;
-}
-LCRYPTO_ALIAS(ASN1_BIT_STRING_check);
-
 int
 ASN1_BIT_STRING_name_print(BIO *out, ASN1_BIT_STRING *bs,
     BIT_STRING_BITNAME *tbl, int indent)
diff --git a/src/lib/libcrypto/asn1/asn1.h b/src/lib/libcrypto/asn1/asn1.h
index bef5cb4808..51fb2862cd 100644
--- a/src/lib/libcrypto/asn1/asn1.h
+++ b/src/lib/libcrypto/asn1/asn1.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: asn1.h,v 1.78 2023/07/28 10:02:11 tb Exp $ */
+/* $OpenBSD: asn1.h,v 1.79 2023/07/28 10:30:16 tb Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -576,8 +576,6 @@ extern const ASN1_ITEM ASN1_BIT_STRING_it;
 int ASN1_BIT_STRING_set(ASN1_BIT_STRING *a, unsigned char *d, int length);
 int ASN1_BIT_STRING_set_bit(ASN1_BIT_STRING *a, int n, int value);
 int ASN1_BIT_STRING_get_bit(const ASN1_BIT_STRING *a, int n);
-int ASN1_BIT_STRING_check(const ASN1_BIT_STRING *a,
-    const unsigned char *flags, int flags_len);
 
 #ifndef OPENSSL_NO_BIO
 int ASN1_BIT_STRING_name_print(BIO *out, ASN1_BIT_STRING *bs,