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authorLibravatar vnugent <public@vaughnnugent.com>2024-01-28 19:23:18 -0500
committerLibravatar vnugent <public@vaughnnugent.com>2024-01-28 19:23:18 -0500
commit626a8d8d3df8880991684d6d1a06b82f6685b51a (patch)
tree183c981ac44886445240ad1e1945f325ceaa9298 /include/mbedtls/x509_csr.h
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+/**
+ * \file x509_csr.h
+ *
+ * \brief X.509 certificate signing request parsing and writing
+ */
+/*
+ * Copyright The Mbed TLS Contributors
+ * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+ */
+#ifndef MBEDTLS_X509_CSR_H
+#define MBEDTLS_X509_CSR_H
+#include "mbedtls/private_access.h"
+
+#include "mbedtls/build_info.h"
+
+#include "mbedtls/x509.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \addtogroup x509_module
+ * \{ */
+
+/**
+ * \name Structures and functions for X.509 Certificate Signing Requests (CSR)
+ * \{
+ */
+
+/**
+ * Certificate Signing Request (CSR) structure.
+ *
+ * Some fields of this structure are publicly readable. Do not modify
+ * them except via Mbed TLS library functions: the effect of modifying
+ * those fields or the data that those fields point to is unspecified.
+ */
+typedef struct mbedtls_x509_csr {
+ mbedtls_x509_buf raw; /**< The raw CSR data (DER). */
+ mbedtls_x509_buf cri; /**< The raw CertificateRequestInfo body (DER). */
+
+ int version; /**< CSR version (1=v1). */
+
+ mbedtls_x509_buf subject_raw; /**< The raw subject data (DER). */
+ mbedtls_x509_name subject; /**< The parsed subject data (named information object). */
+
+ mbedtls_pk_context pk; /**< Container for the public key context. */
+
+ unsigned int key_usage; /**< Optional key usage extension value: See the values in x509.h */
+ unsigned char ns_cert_type; /**< Optional Netscape certificate type extension value: See the values in x509.h */
+ mbedtls_x509_sequence subject_alt_names; /**< Optional list of raw entries of Subject Alternative Names extension. These can be later parsed by mbedtls_x509_parse_subject_alt_name. */
+
+ int MBEDTLS_PRIVATE(ext_types); /**< Bit string containing detected and parsed extensions */
+
+ mbedtls_x509_buf sig_oid;
+ mbedtls_x509_buf MBEDTLS_PRIVATE(sig);
+ mbedtls_md_type_t MBEDTLS_PRIVATE(sig_md); /**< Internal representation of the MD algorithm of the signature algorithm, e.g. MBEDTLS_MD_SHA256 */
+ mbedtls_pk_type_t MBEDTLS_PRIVATE(sig_pk); /**< Internal representation of the Public Key algorithm of the signature algorithm, e.g. MBEDTLS_PK_RSA */
+ void *MBEDTLS_PRIVATE(sig_opts); /**< Signature options to be passed to mbedtls_pk_verify_ext(), e.g. for RSASSA-PSS */
+}
+mbedtls_x509_csr;
+
+/**
+ * Container for writing a CSR
+ */
+typedef struct mbedtls_x509write_csr {
+ mbedtls_pk_context *MBEDTLS_PRIVATE(key);
+ mbedtls_asn1_named_data *MBEDTLS_PRIVATE(subject);
+ mbedtls_md_type_t MBEDTLS_PRIVATE(md_alg);
+ mbedtls_asn1_named_data *MBEDTLS_PRIVATE(extensions);
+}
+mbedtls_x509write_csr;
+
+#if defined(MBEDTLS_X509_CSR_PARSE_C)
+/**
+ * \brief Load a Certificate Signing Request (CSR) in DER format
+ *
+ * \note CSR attributes (if any) are currently silently ignored.
+ *
+ * \note If #MBEDTLS_USE_PSA_CRYPTO is enabled, the PSA crypto
+ * subsystem must have been initialized by calling
+ * psa_crypto_init() before calling this function.
+ *
+ * \param csr CSR context to fill
+ * \param buf buffer holding the CRL data
+ * \param buflen size of the buffer
+ *
+ * \return 0 if successful, or a specific X509 error code
+ */
+int mbedtls_x509_csr_parse_der(mbedtls_x509_csr *csr,
+ const unsigned char *buf, size_t buflen);
+
+/**
+ * \brief Load a Certificate Signing Request (CSR), DER or PEM format
+ *
+ * \note See notes for \c mbedtls_x509_csr_parse_der()
+ *
+ * \note If #MBEDTLS_USE_PSA_CRYPTO is enabled, the PSA crypto
+ * subsystem must have been initialized by calling
+ * psa_crypto_init() before calling this function.
+ *
+ * \param csr CSR context to fill
+ * \param buf buffer holding the CRL data
+ * \param buflen size of the buffer
+ * (including the terminating null byte for PEM data)
+ *
+ * \return 0 if successful, or a specific X509 or PEM error code
+ */
+int mbedtls_x509_csr_parse(mbedtls_x509_csr *csr, const unsigned char *buf, size_t buflen);
+
+#if defined(MBEDTLS_FS_IO)
+/**
+ * \brief Load a Certificate Signing Request (CSR)
+ *
+ * \note See notes for \c mbedtls_x509_csr_parse()
+ *
+ * \param csr CSR context to fill
+ * \param path filename to read the CSR from
+ *
+ * \return 0 if successful, or a specific X509 or PEM error code
+ */
+int mbedtls_x509_csr_parse_file(mbedtls_x509_csr *csr, const char *path);
+#endif /* MBEDTLS_FS_IO */
+
+#if !defined(MBEDTLS_X509_REMOVE_INFO)
+/**
+ * \brief Returns an informational string about the
+ * CSR.
+ *
+ * \param buf Buffer to write to
+ * \param size Maximum size of buffer
+ * \param prefix A line prefix
+ * \param csr The X509 CSR to represent
+ *
+ * \return The length of the string written (not including the
+ * terminated nul byte), or a negative error code.
+ */
+int mbedtls_x509_csr_info(char *buf, size_t size, const char *prefix,
+ const mbedtls_x509_csr *csr);
+#endif /* !MBEDTLS_X509_REMOVE_INFO */
+
+/**
+ * \brief Initialize a CSR
+ *
+ * \param csr CSR to initialize
+ */
+void mbedtls_x509_csr_init(mbedtls_x509_csr *csr);
+
+/**
+ * \brief Unallocate all CSR data
+ *
+ * \param csr CSR to free
+ */
+void mbedtls_x509_csr_free(mbedtls_x509_csr *csr);
+#endif /* MBEDTLS_X509_CSR_PARSE_C */
+
+/** \} name Structures and functions for X.509 Certificate Signing Requests (CSR) */
+
+#if defined(MBEDTLS_X509_CSR_WRITE_C)
+/**
+ * \brief Initialize a CSR context
+ *
+ * \param ctx CSR context to initialize
+ */
+void mbedtls_x509write_csr_init(mbedtls_x509write_csr *ctx);
+
+/**
+ * \brief Set the subject name for a CSR
+ * Subject names should contain a comma-separated list
+ * of OID types and values:
+ * e.g. "C=UK,O=ARM,CN=Mbed TLS Server 1"
+ *
+ * \param ctx CSR context to use
+ * \param subject_name subject name to set
+ *
+ * \return 0 if subject name was parsed successfully, or
+ * a specific error code
+ */
+int mbedtls_x509write_csr_set_subject_name(mbedtls_x509write_csr *ctx,
+ const char *subject_name);
+
+/**
+ * \brief Set the key for a CSR (public key will be included,
+ * private key used to sign the CSR when writing it)
+ *
+ * \param ctx CSR context to use
+ * \param key Asymmetric key to include
+ */
+void mbedtls_x509write_csr_set_key(mbedtls_x509write_csr *ctx, mbedtls_pk_context *key);
+
+/**
+ * \brief Set the MD algorithm to use for the signature
+ * (e.g. MBEDTLS_MD_SHA1)
+ *
+ * \param ctx CSR context to use
+ * \param md_alg MD algorithm to use
+ */
+void mbedtls_x509write_csr_set_md_alg(mbedtls_x509write_csr *ctx, mbedtls_md_type_t md_alg);
+
+/**
+ * \brief Set the Key Usage Extension flags
+ * (e.g. MBEDTLS_X509_KU_DIGITAL_SIGNATURE | MBEDTLS_X509_KU_KEY_CERT_SIGN)
+ *
+ * \param ctx CSR context to use
+ * \param key_usage key usage flags to set
+ *
+ * \return 0 if successful, or MBEDTLS_ERR_X509_ALLOC_FAILED
+ *
+ * \note The <code>decipherOnly</code> flag from the Key Usage
+ * extension is represented by bit 8 (i.e.
+ * <code>0x8000</code>), which cannot typically be represented
+ * in an unsigned char. Therefore, the flag
+ * <code>decipherOnly</code> (i.e.
+ * #MBEDTLS_X509_KU_DECIPHER_ONLY) cannot be set using this
+ * function.
+ */
+int mbedtls_x509write_csr_set_key_usage(mbedtls_x509write_csr *ctx, unsigned char key_usage);
+
+/**
+ * \brief Set Subject Alternative Name
+ *
+ * \param ctx CSR context to use
+ * \param san_list List of SAN values
+ *
+ * \return 0 if successful, or MBEDTLS_ERR_X509_ALLOC_FAILED
+ *
+ * \note Only "dnsName", "uniformResourceIdentifier" and "otherName",
+ * as defined in RFC 5280, are supported.
+ */
+int mbedtls_x509write_csr_set_subject_alternative_name(mbedtls_x509write_csr *ctx,
+ const mbedtls_x509_san_list *san_list);
+
+/**
+ * \brief Set the Netscape Cert Type flags
+ * (e.g. MBEDTLS_X509_NS_CERT_TYPE_SSL_CLIENT | MBEDTLS_X509_NS_CERT_TYPE_EMAIL)
+ *
+ * \param ctx CSR context to use
+ * \param ns_cert_type Netscape Cert Type flags to set
+ *
+ * \return 0 if successful, or MBEDTLS_ERR_X509_ALLOC_FAILED
+ */
+int mbedtls_x509write_csr_set_ns_cert_type(mbedtls_x509write_csr *ctx,
+ unsigned char ns_cert_type);
+
+/**
+ * \brief Generic function to add to or replace an extension in the
+ * CSR
+ *
+ * \param ctx CSR context to use
+ * \param oid OID of the extension
+ * \param oid_len length of the OID
+ * \param critical Set to 1 to mark the extension as critical, 0 otherwise.
+ * \param val value of the extension OCTET STRING
+ * \param val_len length of the value data
+ *
+ * \return 0 if successful, or a MBEDTLS_ERR_X509_ALLOC_FAILED
+ */
+int mbedtls_x509write_csr_set_extension(mbedtls_x509write_csr *ctx,
+ const char *oid, size_t oid_len,
+ int critical,
+ const unsigned char *val, size_t val_len);
+
+/**
+ * \brief Free the contents of a CSR context
+ *
+ * \param ctx CSR context to free
+ */
+void mbedtls_x509write_csr_free(mbedtls_x509write_csr *ctx);
+
+/**
+ * \brief Write a CSR (Certificate Signing Request) to a
+ * DER structure
+ * Note: data is written at the end of the buffer! Use the
+ * return value to determine where you should start
+ * using the buffer
+ *
+ * \param ctx CSR to write away
+ * \param buf buffer to write to
+ * \param size size of the buffer
+ * \param f_rng RNG function. This must not be \c NULL.
+ * \param p_rng RNG parameter
+ *
+ * \return length of data written if successful, or a specific
+ * error code
+ *
+ * \note \p f_rng is used for the signature operation.
+ */
+int mbedtls_x509write_csr_der(mbedtls_x509write_csr *ctx, unsigned char *buf, size_t size,
+ int (*f_rng)(void *, unsigned char *, size_t),
+ void *p_rng);
+
+#if defined(MBEDTLS_PEM_WRITE_C)
+/**
+ * \brief Write a CSR (Certificate Signing Request) to a
+ * PEM string
+ *
+ * \param ctx CSR to write away
+ * \param buf buffer to write to
+ * \param size size of the buffer
+ * \param f_rng RNG function. This must not be \c NULL.
+ * \param p_rng RNG parameter
+ *
+ * \return 0 if successful, or a specific error code
+ *
+ * \note \p f_rng is used for the signature operation.
+ */
+int mbedtls_x509write_csr_pem(mbedtls_x509write_csr *ctx, unsigned char *buf, size_t size,
+ int (*f_rng)(void *, unsigned char *, size_t),
+ void *p_rng);
+#endif /* MBEDTLS_PEM_WRITE_C */
+#endif /* MBEDTLS_X509_CSR_WRITE_C */
+
+/** \} addtogroup x509_module */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* mbedtls_x509_csr.h */