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SourceVuESP-IDF Framework and ExamplesmbedTLSmbedtls_asn1_get_alg()

mbedtls_asn1_get_alg() function

Retrieve an AlgorithmIdentifier ASN.1 sequence. Updates the pointer to immediately behind the full AlgorithmIdentifier.

Syntax

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Summary

Declaration

Definition

from asn1.h:562

int mbedtls_asn1_get_alg(unsigned char **p, const unsigned char *end, mbedtls_asn1_buf *alg, mbedtls_asn1_buf *params);

Implemented in asn1parse.c:351

Arguments

Argument

Declared as

Description

unsigned char **

On entry, \c *p points to the start of the ASN.1 element. On successful completion, \c *p points to the first byte beyond the AlgorithmIdentifier element. On error, the value of \c *p is undefined.

end

const unsigned char *

End of data.

alg

mbedtls_asn1_buf *

The buffer to receive the OID.

params

mbedtls_asn1_buf *

The buffer to receive the parameters. This is zeroized if there are no parameters.

Return value

0 if successful or a specific ASN.1 or MPI error code.

References

Code

Location

Referrer

int mbedtls_asn1_get_alg(unsigned char **p,

asn1parse.c:351

int mbedtls_asn1_get_alg(unsigned char **p,

asn1.h:562

if ((ret = mbedtls_asn1_get_alg(p, end, alg, &params)) != 0) {

asn1parse.c:408

mbedtls_asn1_get_alg_null()

if ((ret = mbedtls_asn1_get_alg(&p, end, &kdf_alg_oid,

pkcs5.c:160

mbedtls_pkcs5_pbes2_ext()

if ((ret = mbedtls_asn1_get_alg(&p, end, &enc_scheme_oid,

pkcs5.c:177

mbedtls_pkcs5_pbes2_ext()

if ((ret = mbedtls_asn1_get_alg(p, end, &alg_oid, params)) != 0) {

pkparse.c:481

pk_get_pk_alg()

if ((ret = mbedtls_asn1_get_alg(&p, end, &pbe_alg_oid, &pbe_params)) != 0) {

pkparse.c:911

mbedtls_pk_parse_key_pkcs8_encrypted_der()

if ((ret = mbedtls_asn1_get_alg(p, end, alg, params)) != 0) {

x509.c:117

mbedtls_x509_get_alg()

Call Tree

mbedtls_asn1_get_alg() is called by 5 functions and calls 3 functions:

mbedtls_asn1_get_alg_null()

mbedtls_pkcs5_pbes2_ext()

pk_get_pk_alg()

mbedtls_pk_parse_key_pkcs8_encrypted_der()

mbedtls_x509_get_alg()

mbedtls_asn1_get_alg()

mbedtls_platform_zeroize()

mbedtls_asn1_get_len()

mbedtls_asn1_get_tag()

Data Use

mbedtls_asn1_get_alg() reads 1 variable and writes 2 variables:

mbedtls_asn1_buf::len

mbedtls_asn1_get_alg()

mbedtls_asn1_buf::tag

mbedtls_asn1_buf::p

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