add ECDSA_size to ec_asn1.c

[openssl.git] / include / openssl / ec.h

diff --git a/include/openssl/ec.h b/include/openssl/ec.h
index ed1fea95753af1a637e7c90ba3e4e2b00542df3c..f0f2ba60df93cd48c33a2ca38a4e860c8da01ba3 100644 (file)
--- a/include/openssl/ec.h
+++ b/include/openssl/ec.h
@@ -1089,6 +1089,12 @@ int ECDSA_sign_ex(int type, const unsigned char *dgst, int dgstlen,
 int ECDSA_verify(int type, const unsigned char *dgst, int dgstlen,
                  const unsigned char *sig, int siglen, EC_KEY *eckey);
 
+/** Returns the maximum length of the DER encoded signature
+ *  \param  eckey  EC_KEY object
+ *  \return numbers of bytes required for the DER encoded signature
+ */
+int ECDSA_size(const EC_KEY *eckey);
+
 # define ECParameters_dup(x) ASN1_dup_of(EC_KEY,i2d_ECParameters,d2i_ECParameters,x)
 
 # ifndef __cplusplus