278     const unsigned char *s1, *s2, *end;  in mbedtls_pem_read_buffer()  local
297     s2 = (unsigned char *) strstr((const char *) data, footer);  in mbedtls_pem_read_buffer()
299     if (s2 == NULL || s2 <= s1) {  in mbedtls_pem_read_buffer()
316     end = s2;  in mbedtls_pem_read_buffer()
331     if (s2 - s1 >= 22 && memcmp(s1, "Proc-Type: 4,ENCRYPTED", 22) == 0) {  in mbedtls_pem_read_buffer()
347         if (s2 - s1 >= 23 && memcmp(s1, "DEK-Info: DES-EDE3-CBC,", 23) == 0) {  in mbedtls_pem_read_buffer()
351             if (s2 - s1 < 16 || pem_get_iv(s1, pem_iv, 8) != 0) {  in mbedtls_pem_read_buffer()
356         } else if (s2 - s1 >= 18 && memcmp(s1, "DEK-Info: DES-CBC,", 18) == 0) {  in mbedtls_pem_read_buffer()
360             if (s2 - s1 < 16 || pem_get_iv(s1, pem_iv, 8) != 0) {  in mbedtls_pem_read_buffer()
369         if (s2 - s1 >= 14 && memcmp(s1, "DEK-Info: AES-", 14) == 0) {  in mbedtls_pem_read_buffer()
370             if (s2 - s1 < 22) {  in mbedtls_pem_read_buffer()
383             if (s2 - s1 < 32 || pem_get_iv(s1, pem_iv, 16) != 0) {  in mbedtls_pem_read_buffer()
408     if (s1 >= s2) {  in mbedtls_pem_read_buffer()
412     ret = mbedtls_base64_decode(NULL, 0, &len, s1, (size_t) (s2 - s1));  in mbedtls_pem_read_buffer()
426     if ((ret = mbedtls_base64_decode(buf, len, &len, s1, (size_t) (s2 - s1))) != 0) {  in mbedtls_pem_read_buffer()