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Improve documentation of mbedtls_x509_crt_parse()

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Fixes #1883.
This commit is contained in:
Hanno Becker 2018-08-23 15:46:33 +01:00
parent 6b7b35b127
commit 3a058e52dd
1 changed files with 26 additions and 11 deletions
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37
include/mbedtls/x509_crt.h
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@ -174,19 +174,34 @@ int mbedtls_x509_crt_parse_der( mbedtls_x509_crt *chain, const unsigned char *bu
size_t buflen );
/**
* \brief Parse 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.
* \brief Parse one DER-encoded or multiple concatenated PEM-encoded
* certificates and add them to the chained list.
*
* \param chain points to the start of the chain
* \param buf buffer holding the certificate data in PEM or DER format
* \param buflen size of the buffer
* (including the terminating null byte for PEM data)
* For PEM-encoded CRTs, 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.
*
* \param chain The chain to which to add the parsed certificates.
* \param buf The buffer holding the certificate data in PEM or DER format.
* For certificates in PEM encoding, this may be a concatenation
* of multiple certificates; for DER encoding, the buffer must
* comprise exactly one certificate.
* \param buflen The size of \p buf, including the terminating \c NULL byte
* in case of PEM encoded data.
*
* \return \c 0 if all certificates were parsed successfully.
* \return The (positive) number of certificates that couldn't
* be parsed if parsing was partly successful (see above).
* \return A negative X509- or PEM-specific error code otherwise.
*
* \return 0 if all certificates parsed successfully, a positive number
* if partly successful or a specific X509 or PEM error code
*/
int mbedtls_x509_crt_parse( mbedtls_x509_crt *chain, const unsigned char *buf, size_t buflen );