romenskiy2012/curl

mirror of https://github.com/curl/curl.git synced 2026-04-26 06:42:17 +03:00

Daniel Stenberg 08a3e8e19a

TLS: remove support for Secure Transport and BearSSL

These libraries do not support TLS 1.3 and have been marked for removal
for over a year. We want to help users select a TLS dependency that is
future-proof and reliable, and not supporting TLS 1.3 in 2025 does not
infer confidence. Users who build libcurl are likely to be served better
and get something more future-proof with a TLS library that supports
1.3.

Closes #16677

2025-06-11 07:54:19 +02:00

2 KiB

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SPDX-License-Identifier

Title

Section

Source

Protocol

See-also

TLS-backend

Added-in

curl

CURLOPT_CAINFO_BLOB

libcurl

TLS

CURLOPT_CAINFO (3)

CURLOPT_CAPATH (3)

CURLOPT_SSL_VERIFYHOST (3)

CURLOPT_SSL_VERIFYPEER (3)

OpenSSL

mbedTLS

rustls

wolfSSL

Schannel

7.77.0

NAME

CURLOPT_CAINFO_BLOB - Certificate Authority (CA) bundle in PEM format

SYNOPSIS

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CAINFO_BLOB,
                          struct curl_blob *stblob);

DESCRIPTION

Pass a pointer to a curl_blob structure, which contains information (pointer and size) about a memory block with binary data of PEM encoded content holding one or more certificates to verify the HTTPS server with.

If the blob is initialized with the flags member of struct curl_blob set to CURL_BLOB_COPY, the application does not have to keep the buffer around after setting this.

If CURLOPT_SSL_VERIFYPEER(3) is zero and you avoid verifying the server's certificate, CURLOPT_CAINFO_BLOB(3) is not needed.

This option overrides CURLOPT_CAINFO(3).

DEFAULT

NULL

%PROTOCOLS%

EXAMPLE

#include <string.h>

int main(void)
{
  char *strpem = "PEMDATA"; /* strpem must point to a PEM string */
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode res;
    struct curl_blob blob;
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
    blob.data = strpem;
    blob.len = strlen(strpem);
    blob.flags = CURL_BLOB_COPY;
    curl_easy_setopt(curl, CURLOPT_CAINFO_BLOB, &blob);
    res = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
  }
}

HISTORY

This option is supported by the mbedTLS (since 7.81.0), Rustls (since 7.82.0), wolfSSL (since 8.2.0), OpenSSL and Schannel backends.

%AVAILABILITY%

RETURN VALUE

curl_easy_setopt(3) returns a CURLcode indicating success or error.

CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3).

2 KiB Raw Blame History