Clean up error message reported after \password encryption failure.

Experimenting with FIPS mode enabled, I saw

regression=# \password joe
Enter new password for user "joe":
Enter it again:
could not encrypt password: disabled for FIPS
out of memory

because PQencryptPasswordConn was still of the opinion that "out of
memory" is always appropriate to print.

Minor oversight in b69aba745.  Like that one, back-patch to v14.

diff --git a/src/interfaces/libpq/fe-auth.c b/src/interfaces/libpq/fe-auth.c
index 2e6b2e8f04e92241f525e01fdd831ca92cabeff6..82fc7cdb9867c1cdc44fedd6eaf03f0b00f1fe50 100644 (file)
--- a/src/interfaces/libpq/fe-auth.c
+++ b/src/interfaces/libpq/fe-auth.c
@@ -1290,6 +1290,10 @@ PQencryptPasswordConn(PGconn *conn, const char *passwd, const char *user,
    if (strcmp(algorithm, "scram-sha-256") == 0)
    {
        crypt_pwd = pg_fe_scram_build_secret(passwd);
+       /* We assume the only possible failure is OOM */
+       if (!crypt_pwd)
+           appendPQExpBufferStr(&conn->errorMessage,
+                                libpq_gettext("out of memory\n"));
    }
    else if (strcmp(algorithm, "md5") == 0)
    {
@@ -1307,6 +1311,9 @@ PQencryptPasswordConn(PGconn *conn, const char *passwd, const char *user,
                crypt_pwd = NULL;
            }
        }
+       else
+           appendPQExpBufferStr(&conn->errorMessage,
+                                libpq_gettext("out of memory\n"));
    }
    else
    {
@@ -1316,9 +1323,5 @@ PQencryptPasswordConn(PGconn *conn, const char *passwd, const char *user,
        return NULL;
    }
 
-   if (!crypt_pwd)
-       appendPQExpBufferStr(&conn->errorMessage,
-                            libpq_gettext("out of memory\n"));
-
    return crypt_pwd;
 }