diff --git a/src/headers/tomcrypt.h b/src/headers/tomcrypt.h
index 96b0e3a..e736a54 100644
--- a/src/headers/tomcrypt.h
+++ b/src/headers/tomcrypt.h
@@ -68,7 +68,8 @@ enum {
    CRYPT_OVERFLOW,         /* An overflow of a value was detected/prevented */
 
    CRYPT_UNUSED1,          /* UNUSED1 */
-   CRYPT_UNUSED2,          /* UNUSED2 */
+
+   CRYPT_INPUT_TOO_LONG,   /* The input was longer than expected. */
 
    CRYPT_PK_INVALID_SIZE,  /* Invalid size input for PK parameters */
 
diff --git a/src/misc/crypt/crypt_constants.c b/src/misc/crypt/crypt_constants.c
index f866f3e..c63d3f8 100644
--- a/src/misc/crypt/crypt_constants.c
+++ b/src/misc/crypt/crypt_constants.c
@@ -48,7 +48,7 @@ static const crypt_constant _crypt_constants[] = {
     _C_STRINGIFY(CRYPT_PK_INVALID_TYPE),
     _C_STRINGIFY(CRYPT_OVERFLOW),
     _C_STRINGIFY(CRYPT_UNUSED1),
-    _C_STRINGIFY(CRYPT_UNUSED2),
+    _C_STRINGIFY(CRYPT_INPUT_TOO_LONG),
     _C_STRINGIFY(CRYPT_PK_INVALID_SIZE),
     _C_STRINGIFY(CRYPT_INVALID_PRIME_SIZE),
     _C_STRINGIFY(CRYPT_PK_INVALID_PADDING),
diff --git a/src/misc/error_to_string.c b/src/misc/error_to_string.c
index 2a0d3f8..707f835 100644
--- a/src/misc/error_to_string.c
+++ b/src/misc/error_to_string.c
@@ -47,7 +47,8 @@ static const char * const err_2_str[] =
    "An overflow of a value was detected/prevented.",
 
    "UNUSED1.",
-   "UNUSED2.",
+
+   "The input was longer than expected.",
 
    "Invalid sized parameter.",
 
diff --git a/src/pk/asn1/der/sequence/der_decode_sequence_ex.c b/src/pk/asn1/der/sequence/der_decode_sequence_ex.c
index 8a6755e..b820c68 100644
--- a/src/pk/asn1/der/sequence/der_decode_sequence_ex.c
+++ b/src/pk/asn1/der/sequence/der_decode_sequence_ex.c
@@ -314,7 +314,7 @@ int der_decode_sequence_ex(const unsigned char *in, unsigned long  inlen,
    if (inlen == 0) {
       err = CRYPT_OK;
    } else {
-      err = CRYPT_PK_INVALID_SIZE;
+      err = CRYPT_INPUT_TOO_LONG;
    }
 
 LBL_ERR:
diff --git a/src/pk/dh/dh_import.c b/src/pk/dh/dh_import.c
index b600b5c..601e5e7 100644
--- a/src/pk/dh/dh_import.c
+++ b/src/pk/dh/dh_import.c
@@ -32,14 +32,12 @@ int dh_import(const unsigned char *in, unsigned long inlen, dh_key *key)
       return err;
    }
 
-   version = 666;
-   flags[0] = 0xff;
    /* find out what type of key it is */
    err = der_decode_sequence_multi(in, inlen,
                                    LTC_ASN1_SHORT_INTEGER, 1UL, &version,
                                    LTC_ASN1_BIT_STRING, 1UL, &flags,
                                    LTC_ASN1_EOL, 0UL, NULL);
-   if (err != CRYPT_OK && err != CRYPT_PK_INVALID_SIZE) {
+   if (err != CRYPT_OK && err != CRYPT_INPUT_TOO_LONG) {
       goto error;
    }
 
diff --git a/src/pk/dsa/dsa_decrypt_key.c b/src/pk/dsa/dsa_decrypt_key.c
index 67426b8..ef4e1dd 100644
--- a/src/pk/dsa/dsa_decrypt_key.c
+++ b/src/pk/dsa/dsa_decrypt_key.c
@@ -48,7 +48,7 @@ int dsa_decrypt_key(const unsigned char *in,  unsigned long  inlen,
    /* decode to find out hash */
    LTC_SET_ASN1(decode, 0, LTC_ASN1_OBJECT_IDENTIFIER, hashOID, sizeof(hashOID)/sizeof(hashOID[0]));
    err = der_decode_sequence(in, inlen, decode, 1);
-   if (err != CRYPT_OK && err != CRYPT_PK_INVALID_SIZE) {
+   if (err != CRYPT_OK && err != CRYPT_INPUT_TOO_LONG) {
       return err;
    }
 
diff --git a/src/pk/dsa/dsa_import.c b/src/pk/dsa/dsa_import.c
index 8d949eb..f1f0633 100644
--- a/src/pk/dsa/dsa_import.c
+++ b/src/pk/dsa/dsa_import.c
@@ -38,12 +38,11 @@ int dsa_import(const unsigned char *in, unsigned long inlen, dsa_key *key)
       return CRYPT_MEM;
    }
 
-   flags[0] = 0xff;
    /* try to match the old libtomcrypt format */
    err = der_decode_sequence_multi(in, inlen, LTC_ASN1_BIT_STRING, 1UL, flags,
                                               LTC_ASN1_EOL,        0UL, NULL);
 
-   if (err == CRYPT_OK || err == CRYPT_PK_INVALID_SIZE) {
+   if (err == CRYPT_OK || err == CRYPT_INPUT_TOO_LONG) {
        /* private key */
        if (flags[0] == 1) {
            if ((err = der_decode_sequence_multi(in, inlen,
diff --git a/src/pk/ecc/ecc_decrypt_key.c b/src/pk/ecc/ecc_decrypt_key.c
index 9492401..51b894b 100644
--- a/src/pk/ecc/ecc_decrypt_key.c
+++ b/src/pk/ecc/ecc_decrypt_key.c
@@ -54,7 +54,7 @@ int ecc_decrypt_key(const unsigned char *in,  unsigned long  inlen,
    /* decode to find out hash */
    LTC_SET_ASN1(decode, 0, LTC_ASN1_OBJECT_IDENTIFIER, hashOID, sizeof(hashOID)/sizeof(hashOID[0]));
    err = der_decode_sequence(in, inlen, decode, 1);
-   if (err != CRYPT_OK && err != CRYPT_PK_INVALID_SIZE) {
+   if (err != CRYPT_OK && err != CRYPT_INPUT_TOO_LONG) {
       return err;
    }
 
diff --git a/src/pk/ecc/ecc_import.c b/src/pk/ecc/ecc_import.c
index fce70e2..c6d474f 100644
--- a/src/pk/ecc/ecc_import.c
+++ b/src/pk/ecc/ecc_import.c
@@ -104,11 +104,10 @@ int ecc_import_ex(const unsigned char *in, unsigned long inlen, ecc_key *key, co
       return CRYPT_MEM;
    }
 
-   flags[0] = 0xff;
    /* find out what type of key it is */
    err = der_decode_sequence_multi(in, inlen, LTC_ASN1_BIT_STRING, 1UL, flags,
                                               LTC_ASN1_EOL,        0UL, NULL);
-   if (err != CRYPT_OK && err != CRYPT_PK_INVALID_SIZE) {
+   if (err != CRYPT_OK && err != CRYPT_INPUT_TOO_LONG) {
       goto done;
    }
 
diff --git a/src/pk/rsa/rsa_import.c b/src/pk/rsa/rsa_import.c
index db432b5..7140a73 100644
--- a/src/pk/rsa/rsa_import.c
+++ b/src/pk/rsa/rsa_import.c
@@ -65,12 +65,11 @@ int rsa_import(const unsigned char *in, unsigned long inlen, rsa_key *key)
       goto LBL_FREE;
    }
 
-   mp_set_int(key->N, 666);
    /* not SSL public key, try to match against PKCS #1 standards */
    err = der_decode_sequence_multi(in, inlen, LTC_ASN1_INTEGER, 1UL, key->N,
                                               LTC_ASN1_EOL,     0UL, NULL);
 
-   if (err != CRYPT_OK && err != CRYPT_PK_INVALID_SIZE) {
+   if (err != CRYPT_OK && err != CRYPT_INPUT_TOO_LONG) {
       goto LBL_ERR;
    }