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08a3e8e19a
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
92 lines
2 KiB
Markdown
92 lines
2 KiB
Markdown
---
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Title: CURLOPT_CAINFO_BLOB
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Section: 3
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Source: libcurl
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Protocol:
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- TLS
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See-also:
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- CURLOPT_CAINFO (3)
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- CURLOPT_CAPATH (3)
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- CURLOPT_SSL_VERIFYHOST (3)
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- CURLOPT_SSL_VERIFYPEER (3)
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TLS-backend:
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- OpenSSL
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- mbedTLS
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- rustls
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- wolfSSL
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- Schannel
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Added-in: 7.77.0
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---
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# NAME
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CURLOPT_CAINFO_BLOB - Certificate Authority (CA) bundle in PEM format
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# SYNOPSIS
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~~~c
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CAINFO_BLOB,
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struct curl_blob *stblob);
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~~~
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# DESCRIPTION
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Pass a pointer to a curl_blob structure, which contains information (pointer
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and size) about a memory block with binary data of PEM encoded content holding
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one or more certificates to verify the HTTPS server with.
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If the blob is initialized with the flags member of struct curl_blob set to
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CURL_BLOB_COPY, the application does not have to keep the buffer around after
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setting this.
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If CURLOPT_SSL_VERIFYPEER(3) is zero and you avoid verifying the
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server's certificate, CURLOPT_CAINFO_BLOB(3) is not needed.
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This option overrides CURLOPT_CAINFO(3).
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# DEFAULT
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NULL
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# %PROTOCOLS%
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# EXAMPLE
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~~~c
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#include <string.h>
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int main(void)
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{
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char *strpem = "PEMDATA"; /* strpem must point to a PEM string */
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CURL *curl = curl_easy_init();
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if(curl) {
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CURLcode res;
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struct curl_blob blob;
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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
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blob.data = strpem;
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blob.len = strlen(strpem);
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blob.flags = CURL_BLOB_COPY;
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curl_easy_setopt(curl, CURLOPT_CAINFO_BLOB, &blob);
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res = curl_easy_perform(curl);
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curl_easy_cleanup(curl);
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}
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}
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~~~
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# HISTORY
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This option is supported by the mbedTLS (since 7.81.0), Rustls (since 7.82.0),
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wolfSSL (since 8.2.0), OpenSSL and Schannel backends.
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# %AVAILABILITY%
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# RETURN VALUE
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curl_easy_setopt(3) returns a CURLcode indicating success or error.
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CURLE_OK (0) means everything was OK, non-zero means an error occurred, see
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libcurl-errors(3).
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