From 057193dcc2089520ab36d95f42d12f4ffd8127b5 Mon Sep 17 00:00:00 2001 From: Kurt Roeckx Date: Sun, 20 Apr 2014 16:50:01 +0200 Subject: Make _asn1_ordering_* return error values and check them. --- lib/coding.c | 48 ++++++++++++++++++++++++++++++------------------ 1 file changed, 30 insertions(+), 18 deletions(-) (limited to 'lib/coding.c') diff --git a/lib/coding.c b/lib/coding.c index 052c947..fda94a7 100644 --- a/lib/coding.c +++ b/lib/coding.c @@ -327,7 +327,8 @@ _asn1_get_utctime_der(unsigned char *der,int *der_len,unsigned char *str) /* must store the length of DER. */ /* Return: */ /* ASN1_MEM_ERROR when DER isn't big enough */ -/* ASN1_SUCCESS otherwise */ +/* ASN1_SUCCESS if succesful */ +/* or an error value. */ /******************************************************/ static int _asn1_objectid_der (unsigned char *str, unsigned char *der, int *der_len) @@ -695,8 +696,10 @@ _asn1_insert_tag_der (asn1_node node, unsigned char *der, int *counter, /* der: string with the DER coding. */ /* node: pointer to the SET element. */ /* Return: */ +/* ASN1_SUCCESS if successful */ +/* or an error value. */ /******************************************************/ -static void +static int _asn1_ordering_set (unsigned char *der, int der_len, asn1_node node) { struct vet @@ -715,7 +718,7 @@ _asn1_ordering_set (unsigned char *der, int der_len, asn1_node node) counter = 0; if (type_field (node->type) != ASN1_ETYPE_SET) - return; + return ASN1_VALUE_NOT_VALID; p = node->down; while (p && ((type_field (p->type) == ASN1_ETYPE_TAG) || @@ -723,14 +726,14 @@ _asn1_ordering_set (unsigned char *der, int der_len, asn1_node node) p = p->right; if ((p == NULL) || (p->right == NULL)) - return; + return ASN1_SUCCESS; first = last = NULL; while (p) { p_vet = malloc (sizeof (struct vet)); if (p_vet == NULL) - return; + return ASN1_MEM_ALLOC_ERROR; p_vet->next = NULL; p_vet->prev = last; @@ -744,7 +747,7 @@ _asn1_ordering_set (unsigned char *der, int der_len, asn1_node node) if (asn1_get_tag_der (der + counter, der_len - counter, &class, &len2, &tag) != ASN1_SUCCESS) - return; + return ASN1_DER_ERROR; t = class << 24; p_vet->value = t | tag; @@ -753,7 +756,7 @@ _asn1_ordering_set (unsigned char *der, int der_len, asn1_node node) /* extraction and length */ len2 = asn1_get_length_der (der + counter, der_len - counter, &len); if (len2 < 0) - return; + return ASN1_DER_ERROR; counter += len + len2; p_vet->end = counter; @@ -773,7 +776,7 @@ _asn1_ordering_set (unsigned char *der, int der_len, asn1_node node) /* change position */ temp = malloc (p_vet->end - counter); if (temp == NULL) - return; + return ASN1_MEM_ALLOC_ERROR; memcpy (temp, der + counter, p_vet->end - counter); memcpy (der + counter, der + p_vet->end, @@ -801,6 +804,7 @@ _asn1_ordering_set (unsigned char *der, int der_len, asn1_node node) free (p_vet); p_vet = first; } + return ASN1_SUCCESS; } /******************************************************/ @@ -811,8 +815,10 @@ _asn1_ordering_set (unsigned char *der, int der_len, asn1_node node) /* der: string with the DER coding. */ /* node: pointer to the SET OF element. */ /* Return: */ +/* ASN1_SUCCESS if successful */ +/* or an error value. */ /******************************************************/ -static void +static int _asn1_ordering_set_of (unsigned char *der, int der_len, asn1_node node) { struct vet @@ -830,23 +836,22 @@ _asn1_ordering_set_of (unsigned char *der, int der_len, asn1_node node) counter = 0; if (type_field (node->type) != ASN1_ETYPE_SET_OF) - return; + return ASN1_VALUE_NOT_VALID; p = node->down; while (p && ((type_field (p->type) == ASN1_ETYPE_TAG) || (type_field (p->type) == ASN1_ETYPE_SIZE))) p = p->right; - p = p->right; if ((p == NULL) || (p->right == NULL)) - return; + return ASN1_SUCCESS; first = last = NULL; while (p) { p_vet = malloc (sizeof (struct vet)); if (p_vet == NULL) - return; + return ASN1_MEM_ALLOC_ERROR; p_vet->next = NULL; p_vet->prev = last; @@ -863,12 +868,12 @@ _asn1_ordering_set_of (unsigned char *der, int der_len, asn1_node node) if (asn1_get_tag_der (der + counter, der_len - counter, &class, &len, NULL) != ASN1_SUCCESS) - return; + return ASN1_DER_ERROR; counter += len; len2 = asn1_get_length_der (der + counter, der_len - counter, &len); if (len2 < 0) - return; + return ASN1_DER_ERROR; counter += len + len2; } @@ -911,7 +916,7 @@ _asn1_ordering_set_of (unsigned char *der, int der_len, asn1_node node) /* change position */ temp = malloc (p_vet->end - counter); if (temp == NULL) - return; + return ASN1_MEM_ALLOC_ERROR; memcpy (temp, der + counter, (p_vet->end) - counter); memcpy (der + counter, der + (p_vet->end), @@ -935,6 +940,7 @@ _asn1_ordering_set_of (unsigned char *der, int der_len, asn1_node node) free (p_vet); p_vet = first; } + return ASN1_SUCCESS; } /** @@ -1167,7 +1173,11 @@ asn1_der_coding (asn1_node element, const char *name, void *ider, int *len, len2 = _asn1_strtol (p->value, NULL, 10); _asn1_set_value (p, NULL, 0); if ((type_field (p->type) == ASN1_ETYPE_SET) && (max_len >= 0)) - _asn1_ordering_set (der + len2, counter - len2, p); + { + err = _asn1_ordering_set (der + len2, counter - len2, p); + if (err != ASN1_SUCCESS) + goto error; + } asn1_length_der (counter - len2, temp, &len3); max_len -= len3; if (max_len >= 0) @@ -1209,7 +1219,9 @@ asn1_der_coding (asn1_node element, const char *name, void *ider, int *len, if ((type_field (p->type) == ASN1_ETYPE_SET_OF) && (counter - len2 > 0) && (max_len >= 0)) { - _asn1_ordering_set_of (der + len2, max_len - len2, p); + err = _asn1_ordering_set_of (der + len2, counter - len2, p); + if (err != ASN1_SUCCESS) + goto error; } asn1_length_der (counter - len2, temp, &len3); max_len -= len3; -- cgit v1.2.3