esp_crt_check_signature() function

Unallocate all certificate data

Initialize a certificate (chain)

Parse one DER-encoded or one or more concatenated PEM-encoded certificates and add them to the chained list. For CRTs in PEM encoding, the function parses permissively: if at least one certificate can be parsed, the function returns the number of certificates for which parsing failed (hence \c 0 if all certificates were parsed successfully). If no certificate could be parsed, the function returns the first (negative) error encountered during parsing. PEM encoded certificates may be interleaved by other data such as human readable descriptions of their content, as long as the certificates are enclosed in the PEM specific '-----{BEGIN/END} CERTIFICATE-----' delimiters.

Set the data required to verify peer certificate

Parse a single DER formatted certificate and add it to the end of the provided chained list.

Check usage of certificate against keyUsage extension.

Set own certificate chain and private key

Verify a chain of certificates. The verify callback is a user-supplied callback that can clear / modify / add flags for a certificate. If set, the verification callback is called for each certificate in the chain (from the trust-ca down to the presented crt). The parameters for the callback are: (void *parameter, mbedtls_x509_crt *crt, int certificate_depth, int *flags). With the flags representing current flags for that specific certificate and the certificate depth from the bottom (Peer cert depth = 0). All flags left after returning from the callback are also returned to the application. The function should return 0 for anything (including invalid certificates) other than fatal error, as a non-zero return code immediately aborts the verification process. For fatal errors, a specific error code should be used (different from MBEDTLS_ERR_X509_CERT_VERIFY_FAILED which should not be returned at this point), or MBEDTLS_ERR_X509_FATAL_ERROR can be used if no better code is available.

Load one or more certificates and add them to the chained list. Parses permissively. If some certificates can be parsed, the result is the number of failed certificates it encountered. If none complete correctly, the first error is returned.

Restartable version of \c mbedtls_crt_verify_with_profile()

Check usage of certificate against extendedKeyUsage.

Verify the certificate revocation status

Set own certificate and key for the current handshake

Set the data required to verify peer certificate for the current handshake

Set DN hints sent to client in CertificateRequest message

Parse a single DER formatted certificate and add it to the end of the provided chained list.

Parse a single DER formatted certificate and add it to the end of the provided chained list. This is a variant of mbedtls_x509_crt_parse_der() which takes temporary ownership of the CRT buffer until the CRT is destroyed.

Load one or more certificate files from a path and add them to the chained list. Parses permissively. If some certificates can be parsed, the result is the number of failed certificates it encountered. If none complete correctly, the first error is returned.

Returns an informational string about the certificate.

Verify a chain of certificates with respect to a configurable security profile.

Access the ca_istrue field

Check if the given CA certificate chain is the default "dummy" certificate chain attached by the esp_crt_bundle

Verification of PKCS #7 signature against a caller-supplied certificate. For each signer in the PKCS structure, this function computes a signature over the supplied data, using the supplied certificate and the same digest algorithm as specified by the signer. It then compares this signature against the signer's signature; verification succeeds if any comparison matches. This function does not use the certificates held within the PKCS #7 structure itself, and does not check that the certificate is signed by a trusted certification authority.

Verification of PKCS #7 signature against a caller-supplied certificate. For each signer in the PKCS structure, this function validates a signature over the supplied hash, using the supplied certificate and the same digest algorithm as specified by the signer. Verification succeeds if any signature is good. This function does not use the certificates held within the PKCS #7 structure itself, and does not check that the certificate is signed by a trusted certification authority.

certificates :: SET OF ExtendedCertificateOrCertificate, ExtendedCertificateOrCertificate ::= CHOICE { certificate Certificate -- x509, extendedCertificate[0] IMPLICIT ExtendedCertificate } Return number of certificates added to the signed data, 0 or higher is valid. Return negative error code for failure.

Set DN hints sent to client in CertificateRequest message

Query certificate for given extension type

Print a X.509 certificate structure to the debug output. This function is always used through the MBEDTLS_SSL_DEBUG_CRT() macro, which supplies the ssl context, file and line number parameters. \attention This function is intended for INTERNAL usage within the library only.