parse_attribute_value_hex_der_encoded() function

Parse a hexstring containing a DER-encoded string.

Syntax

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Summary

Declaration

from x509_create.c:202

static int parse_attribute_value_hex_der_encoded(const char *s, size_t len, unsigned char *data, size_t data_size, size_t *data_len, int *tag);

Arguments

Argument

Description

A string of \p len bytes hexadecimal digits.

len

Number of bytes to read from \p s.

data

Output buffer of size \p data_size. On success, it contains the payload that's DER-encoded in the input (content without the tag and length). If the DER tag is a string tag, the payload is guaranteed not to contain null bytes.

data_size

Length of the \p data buffer.

data_len

On success, the length of the parsed string. It is guaranteed to be less than #MBEDTLS_X509_MAX_DN_NAME_SIZE.

tag

The ASN.1 tag that the payload in \p data is encoded in.

Return value

0 on success. #MBEDTLS_ERR_X509_INVALID_NAME if \p s does not contain a valid hexstring, or if the decoded hexstring is not valid DER, or if the payload does not fit in \p data, or if the payload is more than #MBEDTLS_X509_MAX_DN_NAME_SIZE bytes, of if \p *tag is an ASN.1 string tag and the payload contains a null byte. #MBEDTLS_ERR_X509_ALLOC_FAILED on low memory.