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-rw-r--r--lib/vauth/cleartext.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/lib/vauth/cleartext.c b/lib/vauth/cleartext.c
index 0017d5836..8f972e31c 100644
--- a/lib/vauth/cleartext.c
+++ b/lib/vauth/cleartext.c
@@ -73,7 +73,7 @@ CURLcode Curl_auth_create_plain_message(struct Curl_easy *data,
*outlen = 0;
*outptr = NULL;
- zlen = strlen(authzid);
+ zlen = (authzid == NULL ? 0 : strlen(authzid));
clen = strlen(authcid);
plen = strlen(passwd);
@@ -87,7 +87,8 @@ CURLcode Curl_auth_create_plain_message(struct Curl_easy *data,
return CURLE_OUT_OF_MEMORY;
/* Calculate the reply */
- memcpy(plainauth, authzid, zlen);
+ if(zlen != 0)
+ memcpy(plainauth, authzid, zlen);
plainauth[zlen] = '\0';
memcpy(plainauth + zlen + 1, authcid, clen);
plainauth[zlen + clen + 1] = '\0';