Implement internal ASN.1 types INT32, UINT32, INT64, UINT64

Also Z varieties.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3088)

1 files changed, 213 insertions, 0 deletions

diff --git a/crypto/asn1/x_int64.c b/crypto/asn1/x_int64.c
new file mode 100644
index 0000000000..d180a3bb3a
--- /dev/null
+++ b/crypto/asn1/x_int64.c
@@ -0,0 +1,213 @@
+/*
+ * Copyright 2017 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
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <stdio.h>
+#include "internal/cryptlib.h"
+#include "internal/asn1t.h"
+#include "internal/numbers.h"
+#include <openssl/bn.h>
+#include "asn1_locl.h"
+
+/*
+ * Custom primitive types for handling int32_t, int64_t, uint32_t, uint64_t.
+ * This converts between an ASN1_INTEGER and those types directly.
+ * This is preferred to using the LONG / ZLONG primitives.
+ */
+
+/*
+ * We abuse the ASN1_ITEM fields |size| as a flags field
+ */
+#define INTxx_FLAG_ZERO_DEFAULT (1<<0)
+#define INTxx_FLAG_SIGNED       (1<<1)
+
+static int uint64_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
+{
+    *(uint64_t *)pval = 0;
+    return 1;
+}
+
+static void uint64_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
+{
+    *(uint64_t *)pval = 0;
+}
+
+static int uint64_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype,
+                    const ASN1_ITEM *it)
+{
+    uint64_t utmp;
+    int neg = 0;
+    /* this exists to bypass broken gcc optimization */
+    char *cp = (char *)pval;
+
+    /* use memcpy, because we may not be uint64_t aligned */
+    memcpy(&utmp, cp, sizeof(utmp));
+
+    if ((it->size & INTxx_FLAG_ZERO_DEFAULT) == INTxx_FLAG_ZERO_DEFAULT
+        && utmp == 0)
+        return -1;
+    if ((it->size & INTxx_FLAG_SIGNED) == INTxx_FLAG_SIGNED
+        && (int64_t)utmp < 0)
+        neg = 1;
+
+    return i2c_uint64_int(cont, utmp, neg);
+}
+
+static int uint64_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len,
+                    int utype, char *free_cont, const ASN1_ITEM *it)
+{
+    uint64_t utmp = 0;
+    char *cp = (char *)pval;
+    int neg = 0;
+
+    if (!c2i_uint64_int(&utmp, &neg, &cont, len))
+        return 0;
+    if ((it->size & INTxx_FLAG_SIGNED) == 0 && neg) {
+        ASN1err(ASN1_F_UINT64_C2I, ASN1_R_ILLEGAL_NEGATIVE_VALUE);
+        return 0;
+    }
+    memcpy(cp, &utmp, sizeof(utmp));
+    return 1;
+}
+
+static int uint64_print(BIO *out, ASN1_VALUE **pval, const ASN1_ITEM *it,
+                        int indent, const ASN1_PCTX *pctx)
+{
+    if ((it->size & INTxx_FLAG_SIGNED) == INTxx_FLAG_SIGNED)
+        return BIO_printf(out, "%jd\n", *(int64_t *)pval);
+    return BIO_printf(out, "%ju\n", *(uint64_t *)pval);
+}
+
+/* 32-bit variants */
+
+static int uint32_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
+{
+    *(uint32_t *)pval = 0;
+    return 1;
+}
+
+static void uint32_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
+{
+    *(uint32_t *)pval = 0;
+}
+
+static int uint32_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype,
+                    const ASN1_ITEM *it)
+{
+    uint32_t utmp;
+    int neg = 0;
+    /* this exists to bypass broken gcc optimization */
+    char *cp = (char *)pval;
+
+    /* use memcpy, because we may not be uint32_t aligned */
+    memcpy(&utmp, cp, sizeof(utmp));
+
+    if ((it->size & INTxx_FLAG_ZERO_DEFAULT) == INTxx_FLAG_ZERO_DEFAULT
+        && utmp == 0)
+        return -1;
+    if ((it->size & INTxx_FLAG_SIGNED) == INTxx_FLAG_SIGNED
+        && (int32_t)utmp < 0)
+        neg = 1;
+
+    return i2c_uint64_int(cont, (uint64_t)utmp, neg);
+}
+
+static int uint32_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len,
+                    int utype, char *free_cont, const ASN1_ITEM *it)
+{
+    uint64_t utmp = 0;
+    uint32_t utmp2 = 0;
+    char *cp = (char *)pval;
+    int neg = 0;
+
+    if (!c2i_uint64_int(&utmp, &neg, &cont, len))
+        return 0;
+    if ((it->size & INTxx_FLAG_SIGNED) == 0 && neg) {
+        ASN1err(ASN1_F_UINT32_C2I, ASN1_R_ILLEGAL_NEGATIVE_VALUE);
+        return 0;
+    }
+    utmp2 = (uint32_t)utmp;
+    if (utmp != utmp2
+        || ((it->size & INTxx_FLAG_SIGNED) == INTxx_FLAG_SIGNED
+            && !neg && utmp2 > INT32_MAX)) {
+        ASN1err(ASN1_F_UINT32_C2I, ASN1_R_TOO_LARGE);
+        return 0;
+    }
+    memcpy(cp, &utmp2, sizeof(utmp2));
+    return 1;
+}
+
+static int uint32_print(BIO *out, ASN1_VALUE **pval, const ASN1_ITEM *it,
+                        int indent, const ASN1_PCTX *pctx)
+{
+    if ((it->size & INTxx_FLAG_SIGNED) == INTxx_FLAG_SIGNED)
+        return BIO_printf(out, "%d\n", *(int32_t *)pval);
+    return BIO_printf(out, "%u\n", *(uint32_t *)pval);
+}
+
+
+/* Define the primitives themselves */
+
+static ASN1_PRIMITIVE_FUNCS uint32_pf = {
+    NULL, 0,
+    uint32_new,
+    uint32_free,
+    uint32_free,                  /* Clear should set to initial value */
+    uint32_c2i,
+    uint32_i2c,
+    uint32_print
+};
+
+static ASN1_PRIMITIVE_FUNCS uint64_pf = {
+    NULL, 0,
+    uint64_new,
+    uint64_free,
+    uint64_free,                  /* Clear should set to initial value */
+    uint64_c2i,
+    uint64_i2c,
+    uint64_print
+};
+
+ASN1_ITEM_start(INT32)
+    ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &uint32_pf,
+    INTxx_FLAG_SIGNED, "INT32"
+ASN1_ITEM_end(INT32)
+
+ASN1_ITEM_start(UINT32)
+    ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &uint32_pf, 0, "UINT32"
+ASN1_ITEM_end(UINT32)
+
+ASN1_ITEM_start(INT64)
+    ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &uint64_pf,
+    INTxx_FLAG_SIGNED, "INT64"
+ASN1_ITEM_end(INT64)
+
+ASN1_ITEM_start(UINT64)
+    ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &uint64_pf, 0, "UINT64"
+ASN1_ITEM_end(UINT64)
+
+ASN1_ITEM_start(ZINT32)
+    ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &uint32_pf,
+    INTxx_FLAG_ZERO_DEFAULT|INTxx_FLAG_SIGNED, "ZINT32"
+ASN1_ITEM_end(ZINT32)
+
+ASN1_ITEM_start(ZUINT32)
+    ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &uint32_pf,
+    INTxx_FLAG_ZERO_DEFAULT, "ZUINT32"
+ASN1_ITEM_end(ZUINT32)
+
+ASN1_ITEM_start(ZINT64)
+    ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &uint64_pf,
+    INTxx_FLAG_ZERO_DEFAULT|INTxx_FLAG_SIGNED, "ZINT64"
+ASN1_ITEM_end(ZINT64)
+
+ASN1_ITEM_start(ZUINT64)
+    ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &uint64_pf,
+    INTxx_FLAG_ZERO_DEFAULT, "ZUINT64"
+ASN1_ITEM_end(ZUINT64)
+