76     const unsigned char *s1, *s2, *end = input + ilen;  in convert_pem_to_der()  local
79     s1 = (unsigned char *) strstr( (const char *) input, "-----BEGIN" );  in convert_pem_to_der()
80     if( s1 == NULL )  in convert_pem_to_der()
87     s1 += 10;  in convert_pem_to_der()
88     while( s1 < end && *s1 != '-' )  in convert_pem_to_der()
89         s1++;  in convert_pem_to_der()
90     while( s1 < end && *s1 == '-' )  in convert_pem_to_der()
91         s1++;  in convert_pem_to_der()
92     if( *s1 == '\r' ) s1++;  in convert_pem_to_der()
93     if( *s1 == '\n' ) s1++;  in convert_pem_to_der()
95     if( s2 <= s1 || s2 > end )  in convert_pem_to_der()
98     ret = mbedtls_base64_decode( NULL, 0, &len, (const unsigned char *) s1, s2 - s1 );  in convert_pem_to_der()
105     if( ( ret = mbedtls_base64_decode( output, len, &len, (const unsigned char *) s1,  in convert_pem_to_der()
106                                s2 - s1 ) ) != 0 )  in convert_pem_to_der()