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SourceVuESP-IDF Framework and ExamplesmbedTLSmbedtls_asn1_get_tag()

mbedtls_asn1_get_tag() function

Get the tag and length of the element. Check for the requested tag. Updates the pointer to immediately behind the tag and length.

Syntax

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Summary

Declaration

Definition

from asn1.h:245

int mbedtls_asn1_get_tag(unsigned char **p, const unsigned char *end, size_t *len, int tag);

Implemented in asn1parse.c:61

Arguments

Argument

Description

p

On entry, \c *p points to the start of the ASN.1 element. On successful completion, \c *p points to the first byte after the length, i.e. the first byte of the content. On error, the value of \c *p is undefined.

end

End of data.

len

On successful completion, \c *len contains the length read from the ASN.1 input.

tag

The expected tag.

Return value

0 if successful. #MBEDTLS_ERR_ASN1_UNEXPECTED_TAG if the data does not start with the requested tag. #MBEDTLS_ERR_ASN1_OUT_OF_DATA if the ASN.1 element would end beyond \p end. #MBEDTLS_ERR_ASN1_INVALID_LENGTH if the length is unparsable.

References

Code

Location

Referrer

int mbedtls_asn1_get_tag(unsigned char **p,

int mbedtls_asn1_get_tag(unsigned char **p,

if ((ret = mbedtls_asn1_get_tag(p, end, &len, MBEDTLS_ASN1_BOOLEAN)) != 0) {

mbedtls_asn1_get_bool()

if ((ret = mbedtls_asn1_get_tag(p, end, &len, tag)) != 0) {

asn1parse.c:108

asn1_get_tagged_int()

if ((ret = mbedtls_asn1_get_tag(p, end, &len, MBEDTLS_ASN1_INTEGER)) != 0) {

asn1parse.c:170

mbedtls_asn1_get_mpi()

if ((ret = mbedtls_asn1_get_tag(p, end, &bs->len, MBEDTLS_ASN1_BIT_STRING)) != 0) {

asn1parse.c:188

mbedtls_asn1_get_bitstring()

if ((ret = mbedtls_asn1_get_tag(p, end, &len,

asn1parse.c:233

mbedtls_asn1_traverse_sequence_of()

if ((ret = mbedtls_asn1_get_tag(p, end, len, MBEDTLS_ASN1_BIT_STRING)) != 0) {

asn1parse.c:276

mbedtls_asn1_get_bitstring_null()

if ((ret = mbedtls_asn1_get_tag(p, end, &len,

asn1parse.c:358

mbedtls_asn1_get_alg()

if ((ret = mbedtls_asn1_get_tag(p, end, &alg->len, MBEDTLS_ASN1_OID)) != 0) {

asn1parse.c:370

mbedtls_asn1_get_alg()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len,

mbedtls_dhm_parse_dhm()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len,

mbedtls_ecdsa_read_signature_restartable()

if ((ret = mbedtls_asn1_get_tag(p, end, &salt->len, MBEDTLS_ASN1_OCTET_STRING)) != 0) {

pkcs12_parse_pbe_params()

if ((ret = mbedtls_asn1_get_tag(&p, end, &salt->len,

pkcs5_parse_pbkdf2_params()

ret = mbedtls_asn1_get_tag(p, end, len, MBEDTLS_ASN1_CONSTRUCTED

pkcs7_get_next_content_len()

ret = mbedtls_asn1_get_tag(p, end, &len, MBEDTLS_ASN1_CONSTRUCTED

pkcs7_get_content_info_type()

ret = mbedtls_asn1_get_tag(p, *seq_end, &len, MBEDTLS_ASN1_OID);

pkcs7_get_content_info_type()

ret = mbedtls_asn1_get_tag(p, end, &len, MBEDTLS_ASN1_CONSTRUCTED

pkcs7_get_digest_algorithm_set()

ret = mbedtls_asn1_get_tag(p, end, &len1, MBEDTLS_ASN1_CONSTRUCTED

pkcs7_get_certificates()

ret = mbedtls_asn1_get_tag(p, end_set, &len2, MBEDTLS_ASN1_CONSTRUCTED

pkcs7_get_certificates()

ret = mbedtls_asn1_get_tag(p, end, &len, MBEDTLS_ASN1_OCTET_STRING);

pkcs7_get_signature()

asn1_ret = mbedtls_asn1_get_tag(p, end, &len, MBEDTLS_ASN1_CONSTRUCTED

pkcs7_get_signer_info()

asn1_ret = mbedtls_asn1_get_tag(p, end_signer, &len,

pkcs7_get_signer_info()

asn1_ret = mbedtls_asn1_get_tag(p, end_issuer_and_sn, &len,

pkcs7_get_signer_info()

ret = mbedtls_asn1_get_tag(p, end, &len, MBEDTLS_ASN1_CONSTRUCTED

pkcs7_get_signers_info_set()

ret = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_CONSTRUCTED

pkcs7_get_signed_data()

ret = mbedtls_asn1_get_tag(&p,

pkcs7_get_signed_data()

ret = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_CONSTRUCTED

mbedtls_pkcs7_parse_der()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_OID)) != 0) {

mbedtls_pkcs7_parse_der()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len,

pk_group_from_specified()

if ((ret = mbedtls_asn1_get_tag(&p, end_field, &len, MBEDTLS_ASN1_OID)) != 0) {

pk_group_from_specified()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len,

pk_group_from_specified()

if ((ret = mbedtls_asn1_get_tag(&p, end_curve, &len, MBEDTLS_ASN1_OCTET_STRING)) != 0 ||

pk_group_from_specified()

if ((ret = mbedtls_asn1_get_tag(&p, end_curve, &len, MBEDTLS_ASN1_OCTET_STRING)) != 0 ||

pk_group_from_specified()

if ((ret = mbedtls_asn1_get_tag(&p, end_curve, &len, MBEDTLS_ASN1_BIT_STRING)) == 0) {

pk_group_from_specified()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_OCTET_STRING)) != 0) {

pk_group_from_specified()

if ((ret = mbedtls_asn1_get_tag(p, end, &params->len, params->tag)) != 0) {

pk_get_ecparams()

if ((ret = mbedtls_asn1_get_tag(&key, (key + keylen), &len, MBEDTLS_ASN1_OCTET_STRING)) != 0) {

pk_parse_key_rfc8410_der()

if ((ret = mbedtls_asn1_get_tag(p, end, &len,

mbedtls_pk_parse_subpubkey()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len,

pk_parse_key_sec1_der()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_OCTET_STRING)) != 0) {

pk_parse_key_sec1_der()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len,

pk_parse_key_sec1_der()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len,

pk_parse_key_sec1_der()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len,

pk_parse_key_pkcs8_unencrypted_der()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_OCTET_STRING)) != 0) {

pk_parse_key_pkcs8_unencrypted_der()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len,

mbedtls_pk_parse_key_pkcs8_encrypted_der()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_OCTET_STRING)) != 0) {

mbedtls_pk_parse_key_pkcs8_encrypted_der()

ret = mbedtls_asn1_get_tag(&p, p + der_len, &unpadded_len,

convert_der_to_raw_single_int()

ret = mbedtls_asn1_get_tag(&p, der + der_len, &data_len,

mbedtls_ecdsa_der_to_raw()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len,

mbedtls_rsa_parse_key()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len,

mbedtls_rsa_parse_pubkey()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_INTEGER)) != 0) {

mbedtls_rsa_parse_pubkey()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_INTEGER)) != 0) {

mbedtls_rsa_parse_pubkey()

if ((ret = mbedtls_asn1_get_tag(&p, end, &md_oid.len, MBEDTLS_ASN1_OID)) != 0) {

x509_get_hash_alg()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_NULL)) != 0 || len != 0) {

x509_get_hash_alg()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len,

mbedtls_x509_get_rsassa_pss_params()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len,

mbedtls_x509_get_rsassa_pss_params()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len,

mbedtls_x509_get_rsassa_pss_params()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len,

mbedtls_x509_get_rsassa_pss_params()

if ((ret = mbedtls_asn1_get_tag(p, end, &len,

x509_get_attr_type_value()

if ((ret = mbedtls_asn1_get_tag(p, end, &oid->len, MBEDTLS_ASN1_OID)) != 0) {

x509_get_attr_type_value()

if ((ret = mbedtls_asn1_get_tag(p, end, &set_len,

mbedtls_x509_get_name()

ret = mbedtls_asn1_get_tag(p, end, &ext->len,

mbedtls_x509_get_ext()

if ((ret = mbedtls_asn1_get_tag(p, end, &len,

mbedtls_x509_get_ext()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len,

x509_get_other_name()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len,

x509_get_other_name()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len,

x509_get_other_name()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_OID)) != 0) {

x509_get_other_name()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len,

x509_get_other_name()

if ((ret = mbedtls_asn1_get_tag(p, end, &len,

mbedtls_x509_get_subject_alt_name()

ret = mbedtls_asn1_get_tag(&p, p + san_buf->len, &name_len,

mbedtls_x509_parse_subject_alt_name()

if ((ret = mbedtls_asn1_get_tag(p, end, &len,

x509_get_crl_ext()

if ((ret = mbedtls_asn1_get_tag(p, end_ext_data, &len,

x509_get_crl_ext()

if ((ret = mbedtls_asn1_get_tag(p, end_ext_data, &len,

x509_get_crl_ext()

if ((ret = mbedtls_asn1_get_tag(p, end, &ext->len,

x509_get_crl_entry_ext()

if ((ret = mbedtls_asn1_get_tag(p, end, &len,

x509_get_crl_entry_ext()

if ((ret = mbedtls_asn1_get_tag(p, end, &entry_len,

x509_get_entries()

if ((ret = mbedtls_asn1_get_tag(p, end, &len2,

x509_get_entries()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len,

mbedtls_x509_crl_parse_der()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len,

mbedtls_x509_crl_parse_der()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len,

mbedtls_x509_crl_parse_der()

if ((ret = mbedtls_asn1_get_tag(p, end, &len,

x509_get_version()

if ((ret = mbedtls_asn1_get_tag(p, end, &len,

x509_get_dates()

if ((ret = mbedtls_asn1_get_tag(p, end, &uid->len,

if ((ret = mbedtls_asn1_get_tag(p, end, &len,

x509_get_basic_constraints()

if ((ret = mbedtls_asn1_get_tag(p, end, &len,

x509_get_subject_key_id()

if ((ret = mbedtls_asn1_get_tag(p, end, &len,

x509_get_authority_key_id()

ret = mbedtls_asn1_get_tag(p, end, &len,

x509_get_authority_key_id()

if ((ret = mbedtls_asn1_get_tag(p, end, &len,

x509_get_authority_key_id()

if ((ret = mbedtls_asn1_get_tag(p, end, &len,

x509_get_authority_key_id()

ret = mbedtls_asn1_get_tag(p, end, &len,

x509_get_certificate_policies()

if ((ret = mbedtls_asn1_get_tag(p, end, &len,

x509_get_certificate_policies()

if ((ret = mbedtls_asn1_get_tag(p, policy_end, &len,

x509_get_certificate_policies()

if ((ret = mbedtls_asn1_get_tag(p, policy_end, &len,

x509_get_certificate_policies()

if ((ret = mbedtls_asn1_get_tag(p, end, &len,

x509_get_crt_ext()

if ((ret = mbedtls_asn1_get_tag(p, end_ext_data, &extn_oid.len,

x509_get_crt_ext()

if ((ret = mbedtls_asn1_get_tag(p, end_ext_data, &len,

x509_get_crt_ext()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len,

x509_crt.c:1107

x509_crt_parse_der_core()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len,

x509_crt.c:1137

x509_crt_parse_der_core()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len,

x509_crt.c:1180

x509_crt_parse_der_core()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len,

x509_crt.c:1210

x509_crt_parse_der_core()

if ((ret = mbedtls_asn1_get_tag(p, end, &len,

x509_csr_parse_extensions()

if ((ret = mbedtls_asn1_get_tag(p, end_ext_data, &extn_oid.len,

x509_csr_parse_extensions()

if ((ret = mbedtls_asn1_get_tag(p, end_ext_data, &len,

x509_csr_parse_extensions()

if ((ret = mbedtls_asn1_get_tag(p, end, &len,

x509_csr_parse_attributes()

if ((ret = mbedtls_asn1_get_tag(p, end_attr_data, &attr_oid.len,

x509_csr_parse_attributes()

if ((ret = mbedtls_asn1_get_tag(p, end, &len,

x509_csr_parse_attributes()

if ((ret = mbedtls_asn1_get_tag(p, end, &len,

x509_csr_parse_attributes()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len,

mbedtls_x509_csr_parse_der_internal()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len,

mbedtls_x509_csr_parse_der_internal()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len,

mbedtls_x509_csr_parse_der_internal()

if ((ret = mbedtls_asn1_get_tag(&p, end, &len,

mbedtls_x509_csr_parse_der_internal()

Call Tree

mbedtls_asn1_get_tag() is called by 55 functions and calls 1 function:

mbedtls_asn1_get_bool()

asn1_get_tagged_int()

mbedtls_asn1_get_mpi()

mbedtls_asn1_get_bitstring()

mbedtls_asn1_traverse_sequence_of()

mbedtls_asn1_get_bitstring_null()

mbedtls_asn1_get_alg()

mbedtls_dhm_parse_dhm()

mbedtls_ecdsa_read_signature_restartable()

pkcs12_parse_pbe_params()

pkcs5_parse_pbkdf2_params()

pk_group_from_specified()

pk_get_ecparams()

pk_parse_key_rfc8410_der()

mbedtls_pk_parse_subpubkey()

pk_parse_key_sec1_der()

pk_parse_key_pkcs8_unencrypted_der()

mbedtls_pk_parse_key_pkcs8_encrypted_der()

convert_der_to_raw_single_int()

mbedtls_ecdsa_der_to_raw()

mbedtls_rsa_parse_key()

mbedtls_rsa_parse_pubkey()

pkcs7_get_next_content_len()

pkcs7_get_content_info_type()

pkcs7_get_digest_algorithm_set()

pkcs7_get_certificates()

pkcs7_get_signature()

pkcs7_get_signer_info()

pkcs7_get_signers_info_set()

pkcs7_get_signed_data()

mbedtls_pkcs7_parse_der()

x509_get_hash_alg()

mbedtls_x509_get_rsassa_pss_params()

x509_get_attr_type_value()

mbedtls_x509_get_name()

mbedtls_x509_get_ext()

x509_get_other_name()

mbedtls_x509_get_subject_alt_name()

mbedtls_x509_parse_subject_alt_name()

x509_get_crl_ext()

x509_get_crl_entry_ext()

x509_get_entries()

mbedtls_x509_crl_parse_der()

x509_get_version()

x509_get_dates()

x509_get_basic_constraints()

x509_get_subject_key_id()

x509_get_authority_key_id()

x509_get_certificate_policies()

x509_get_crt_ext()

x509_crt_parse_der_core()

x509_csr_parse_extensions()

x509_csr_parse_attributes()

mbedtls_x509_csr_parse_der_internal()

mbedtls_asn1_get_tag()

mbedtls_asn1_get_len()

Data Use

mbedtls_asn1_get_tag():

mbedtls_asn1_get_tag()

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