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SourceVuESP-IDF Framework and ExamplesESP-IDFcrypto_cipher_init()

crypto_cipher_init() function

crypto_cipher_init - Initialize block/stream cipher function @alg: Cipher algorithm @iv: Initialization vector for block ciphers or %NULL for stream ciphers @key: Cipher key @key_len: Length of key in bytes Returns: Pointer to cipher context to use with other cipher functions or %NULL on failure This function is only used with internal TLSv1 implementation (CONFIG_TLS=internal). If that is not used, the crypto wrapper does not need to implement this.

Syntax

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Summary

Declaration

from crypto.h:237

struct crypto_cipher * crypto_cipher_init(enum crypto_cipher_alg alg, const u8 *iv, const u8 *key, size_t key_len);

Arguments

Argument

Declared as

alg

enum crypto_cipher_alg

iv

const u8 *

key

const u8 *

key_len

size_t

References

Code

Location

Referrer

struct crypto_cipher *crypto_cipher_init(enum crypto_cipher_alg alg,

crypto_mbedtls.c:555

struct crypto_cipher * crypto_cipher_init(enum crypto_cipher_alg alg,

return crypto_cipher_init(CRYPTO_CIPHER_ALG_3DES, params->iv,

pkcs5_crypto_init_pbes2()

return crypto_cipher_init(CRYPTO_CIPHER_ALG_3DES, iv, key, sizeof(key));

pkcs12_crypto_init_sha1()

return crypto_cipher_init(CRYPTO_CIPHER_ALG_DES, hash + 8, hash, 8);

pkcs5_crypto_init()

rl->write_cbc = crypto_cipher_init(rl->cipher_alg,

tlsv1_record.c:87

tlsv1_record_change_write_cipher()

rl->read_cbc = crypto_cipher_init(rl->cipher_alg,

tlsv1_record.c:121

tlsv1_record_change_read_cipher()

Call Tree

crypto_cipher_init() is called by 5 functions and calls 6 functions:

pkcs5_crypto_init_pbes2()

pkcs12_crypto_init_sha1()

pkcs5_crypto_init()

tlsv1_record_change_write_cipher()

tlsv1_record_change_read_cipher()

crypto_cipher_init()

mbedtls_cipher_set_padding_mode()

mbedtls_cipher_info_from_type()

crypto_init_cipher_ctx()

alg_to_mbedtls_cipher()

Data Use

crypto_cipher_init() reads 4 variables:

mbedtls_cipher_padding_t::MBEDTLS_PADDING_NONE

mbedtls_operation_t::MBEDTLS_DECRYPT

mbedtls_operation_t::MBEDTLS_ENCRYPT

mbedtls_cipher_type_t::MBEDTLS_CIPHER_NONE

crypto_cipher_init()

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Implementations

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Instances

Lifecycle

crypto_cipher_init() allocates 1 types and frees 1 types:

crypto_cipher_init()