275     const unsigned char *s1, *s2, *end;  in mbedtls_pem_read_buffer()  local
288     s1 = (unsigned char *) strstr((const char *) data, header);  in mbedtls_pem_read_buffer()
290     if (s1 == NULL) {  in mbedtls_pem_read_buffer()
296     if (s2 == NULL || s2 <= s1) {  in mbedtls_pem_read_buffer()
300     s1 += strlen(header);  in mbedtls_pem_read_buffer()
301     if (*s1 == ' ') {  in mbedtls_pem_read_buffer()
302         s1++;  in mbedtls_pem_read_buffer()
304     if (*s1 == '\r') {  in mbedtls_pem_read_buffer()
305         s1++;  in mbedtls_pem_read_buffer()
307     if (*s1 == '\n') {  in mbedtls_pem_read_buffer()
308         s1++;  in mbedtls_pem_read_buffer()
328     if (s2 - s1 >= 22 && memcmp(s1, "Proc-Type: 4,ENCRYPTED", 22) == 0) {  in mbedtls_pem_read_buffer()
332         s1 += 22;  in mbedtls_pem_read_buffer()
333         if (*s1 == '\r') {  in mbedtls_pem_read_buffer()
334             s1++;  in mbedtls_pem_read_buffer()
336         if (*s1 == '\n') {  in mbedtls_pem_read_buffer()
337             s1++;  in mbedtls_pem_read_buffer()
344         if (s2 - s1 >= 23 && memcmp(s1, "DEK-Info: DES-EDE3-CBC,", 23) == 0) {  in mbedtls_pem_read_buffer()
347             s1 += 23;  in mbedtls_pem_read_buffer()
348             if (s2 - s1 < 16 || pem_get_iv(s1, pem_iv, 8) != 0) {  in mbedtls_pem_read_buffer()
352             s1 += 16;  in mbedtls_pem_read_buffer()
353         } else if (s2 - s1 >= 18 && memcmp(s1, "DEK-Info: DES-CBC,", 18) == 0) {  in mbedtls_pem_read_buffer()
356             s1 += 18;  in mbedtls_pem_read_buffer()
357             if (s2 - s1 < 16 || pem_get_iv(s1, pem_iv, 8) != 0) {  in mbedtls_pem_read_buffer()
361             s1 += 16;  in mbedtls_pem_read_buffer()
366         if (s2 - s1 >= 14 && memcmp(s1, "DEK-Info: AES-", 14) == 0) {  in mbedtls_pem_read_buffer()
367             if (s2 - s1 < 22) {  in mbedtls_pem_read_buffer()
369             } else if (memcmp(s1, "DEK-Info: AES-128-CBC,", 22) == 0) {  in mbedtls_pem_read_buffer()
371             } else if (memcmp(s1, "DEK-Info: AES-192-CBC,", 22) == 0) {  in mbedtls_pem_read_buffer()
373             } else if (memcmp(s1, "DEK-Info: AES-256-CBC,", 22) == 0) {  in mbedtls_pem_read_buffer()
379             s1 += 22;  in mbedtls_pem_read_buffer()
380             if (s2 - s1 < 32 || pem_get_iv(s1, pem_iv, 16) != 0) {  in mbedtls_pem_read_buffer()
384             s1 += 32;  in mbedtls_pem_read_buffer()
392         if (*s1 == '\r') {  in mbedtls_pem_read_buffer()
393             s1++;  in mbedtls_pem_read_buffer()
395         if (*s1 == '\n') {  in mbedtls_pem_read_buffer()
396             s1++;  in mbedtls_pem_read_buffer()
405     if (s1 >= s2) {  in mbedtls_pem_read_buffer()
409     ret = mbedtls_base64_decode(NULL, 0, &len, s1, (size_t) (s2 - s1));  in mbedtls_pem_read_buffer()
423     if ((ret = mbedtls_base64_decode(buf, len, &len, s1, (size_t) (s2 - s1))) != 0) {  in mbedtls_pem_read_buffer()