Add ASN1_TYPE_cmp and X509_ALGOR_cmp.

(these are needed for certificate fingerprint fixes)
Reviewed-by: Emilia Käsper <emilia@openssl.org>

4 files changed, 58 insertions, 0 deletions

diff --git a/crypto/asn1/a_type.c b/crypto/asn1/a_type.c
index 36beceacdb..b7a95ad219 100644
--- a/crypto/asn1/a_type.c
+++ b/crypto/asn1/a_type.c
@@ -108,3 +108,49 @@ int ASN1_TYPE_set1(ASN1_TYPE *a, int type, const void *value)
 
 IMPLEMENT_STACK_OF(ASN1_TYPE)
 IMPLEMENT_ASN1_SET_OF(ASN1_TYPE)
+
+/* Returns 0 if they are equal, != 0 otherwise. */
+int ASN1_TYPE_cmp(const ASN1_TYPE *a, const ASN1_TYPE *b)
+	{
+	int result = -1;
+
+	if (!a || !b || a->type != b->type) return -1;
+
+	switch (a->type)
+		{
+	case V_ASN1_OBJECT:
+		result = OBJ_cmp(a->value.object, b->value.object);
+		break;
+	case V_ASN1_NULL:
+		result = 0;	/* They do not have content. */
+		break;
+	case V_ASN1_INTEGER:
+	case V_ASN1_NEG_INTEGER:
+	case V_ASN1_ENUMERATED:
+	case V_ASN1_NEG_ENUMERATED:
+	case V_ASN1_BIT_STRING:
+	case V_ASN1_OCTET_STRING:
+	case V_ASN1_SEQUENCE:
+	case V_ASN1_SET:
+	case V_ASN1_NUMERICSTRING:
+	case V_ASN1_PRINTABLESTRING:
+	case V_ASN1_T61STRING:
+	case V_ASN1_VIDEOTEXSTRING:
+	case V_ASN1_IA5STRING:
+	case V_ASN1_UTCTIME:
+	case V_ASN1_GENERALIZEDTIME:
+	case V_ASN1_GRAPHICSTRING:
+	case V_ASN1_VISIBLESTRING:
+	case V_ASN1_GENERALSTRING:
+	case V_ASN1_UNIVERSALSTRING:
+	case V_ASN1_BMPSTRING:
+	case V_ASN1_UTF8STRING:
+	case V_ASN1_OTHER:
+	default:
+		result = ASN1_STRING_cmp((ASN1_STRING *) a->value.ptr,
+					 (ASN1_STRING *) b->value.ptr);
+		break;
+		}
+
+	return result;
+	}
diff --git a/crypto/asn1/asn1.h b/crypto/asn1/asn1.h
index aeb3f4c1b4..bd7af2d509 100644
--- a/crypto/asn1/asn1.h
+++ b/crypto/asn1/asn1.h
@@ -769,6 +769,7 @@ DECLARE_ASN1_FUNCTIONS_fname(ASN1_TYPE, ASN1_ANY, ASN1_TYPE)
 int ASN1_TYPE_get(ASN1_TYPE *a);
 void ASN1_TYPE_set(ASN1_TYPE *a, int type, void *value);
 int ASN1_TYPE_set1(ASN1_TYPE *a, int type, const void *value);
+int            ASN1_TYPE_cmp(const ASN1_TYPE *a, const ASN1_TYPE *b);
 
 ASN1_OBJECT *	ASN1_OBJECT_new(void );
 void		ASN1_OBJECT_free(ASN1_OBJECT *a);
diff --git a/crypto/asn1/x_algor.c b/crypto/asn1/x_algor.c
index 99e53429b7..acc41bacca 100644
--- a/crypto/asn1/x_algor.c
+++ b/crypto/asn1/x_algor.c
@@ -128,3 +128,13 @@ void X509_ALGOR_get0(ASN1_OBJECT **paobj, int *pptype, void **ppval,
 		}
 	}
 
+int X509_ALGOR_cmp(const X509_ALGOR *a, const X509_ALGOR *b)
+	{
+	int rv;
+	rv = OBJ_cmp(a->algorithm, b->algorithm);
+	if (rv)
+		return rv;
+	if (!a->parameter && !b->parameter)
+		return 0;
+	return ASN1_TYPE_cmp(a->parameter, b->parameter);
+	}
diff --git a/crypto/x509/x509.h b/crypto/x509/x509.h
index c34689a1b3..e77ee69106 100644
--- a/crypto/x509/x509.h
+++ b/crypto/x509/x509.h
@@ -870,6 +870,7 @@ X509_ALGOR *X509_ALGOR_dup(X509_ALGOR *xn);
 int X509_ALGOR_set0(X509_ALGOR *alg, ASN1_OBJECT *aobj, int ptype, void *pval);
 void X509_ALGOR_get0(ASN1_OBJECT **paobj, int *pptype, void **ppval,
 						X509_ALGOR *algor);
+int X509_ALGOR_cmp(const X509_ALGOR *a, const X509_ALGOR *b);
 
 X509_NAME *X509_NAME_dup(X509_NAME *xn);
 X509_NAME_ENTRY *X509_NAME_ENTRY_dup(X509_NAME_ENTRY *ne);