/*
This file is part of GNUnet.
- (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007 Christian Grothoff (and other contributing authors)
+ (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2012 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
*/
#define GNUNET_CRYPTO_AES_KEY_LENGTH (256/8)
-
/**
* @brief Length of RSA encrypted data (2048 bit)
*
*/
#define GNUNET_CRYPTO_RSA_DATA_ENCODING_LENGTH 256
-
/**
- * Length of an RSA KEY (d,e,len), 2048 bit (=256 octests) key d, 2 byte e
+ * Length of an RSA KEY (n,e,len), 2048 bit (=256 octests) key n, 2 byte e
*/
#define GNUNET_CRYPTO_RSA_KEY_LENGTH 258
-
/**
* Length of a hash value
*/
-#define GNUNET_CRYPTO_HASH_LENGTH 512/8
+#define GNUNET_CRYPTO_HASH_LENGTH (512/8)
+
+/**
+ * Maximum length of an ECC signature.
+ * Note: round up to multiple of 8 minus 2 for alignment.
+ */
+#define GNUNET_CRYPTO_ECC_SIGNATURE_DATA_ENCODING_LENGTH 190
+
+/**
+ * Maximum length of the public key (q-point, Q = dP) when encoded.
+ */
+#define GNUNET_CRYPTO_ECC_MAX_PUBLIC_KEY_LENGTH 140
+
/**
* The private information of an RSA key pair.
*/
struct GNUNET_CRYPTO_RsaPrivateKey;
+/**
+ * The private information of an ECC private key.
+ */
+struct GNUNET_CRYPTO_EccPrivateKey;
+
+
GNUNET_NETWORK_STRUCT_BEGIN
/**
/**
- * @brief 0-terminated ASCII encoding of a GNUNET_HashCode.
+ * @brief 0-terminated ASCII encoding of a struct GNUNET_HashCode.
*/
struct GNUNET_CRYPTO_HashAsciiEncoded
{
};
+/**
+ * @brief 0-terminated ASCII encoding of a 'struct GNUNET_ShortHashCode'.
+ */
+struct GNUNET_CRYPTO_ShortHashAsciiEncoded
+{
+ unsigned char short_encoding[53];
+};
+
+
/**
* @brief an RSA signature
};
+/**
+ * @brief header of what an ECC signature signs
+ * this must be followed by "size - 8" bytes of
+ * the actual signed data
+ */
+struct GNUNET_CRYPTO_EccSignaturePurpose
+{
+ /**
+ * How many bytes does this signature sign?
+ * (including this purpose header); in network
+ * byte order (!).
+ */
+ uint32_t size GNUNET_PACKED;
+
+ /**
+ * What does this signature vouch for? This
+ * must contain a GNUNET_SIGNATURE_PURPOSE_XXX
+ * constant (from gnunet_signatures.h). In
+ * network byte order!
+ */
+ uint32_t purpose GNUNET_PACKED;
+
+};
+
+
+/**
+ * @brief an ECC signature
+ */
+struct GNUNET_CRYPTO_EccSignature
+{
+ /**
+ * Overall size of the signature data.
+ */
+ uint16_t size;
+
+ /**
+ * S-expression, padded with zeros.
+ */
+ char sexpr[GNUNET_CRYPTO_ECC_SIGNATURE_DATA_ENCODING_LENGTH];
+};
+
+
+/**
+ * Public ECC key (always for NIST P-521) encoded in a format suitable
+ * for network transmission as created using 'gcry_sexp_sprint'.
+ */
+struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded
+{
+ /**
+ * Size of the encoding, in network byte order.
+ */
+ uint16_t size;
+
+ /**
+ * Actual length of the q-point binary encoding.
+ */
+ uint16_t len;
+
+ /**
+ * 0-padded q-point in binary encoding (GCRYPT_MPI_FMT_USG).
+ */
+ unsigned char key[GNUNET_CRYPTO_ECC_MAX_PUBLIC_KEY_LENGTH];
+};
+
+
+struct GNUNET_CRYPTO_EccPrivateKeyBinaryEncoded
+{
+ /**
+ * Overall size of the private key.
+ */
+ uint16_t size;
+
+ /* followd by S-expression, opaque to applications */
+
+ /* FIXME: consider defining padding to make this a fixed-size struct */
+
+};
+
+
/**
* @brief type for session keys
*/
* @brief IV for sym cipher
*
* NOTE: must be smaller (!) in size than the
- * GNUNET_HashCode.
+ * struct GNUNET_HashCode.
*/
struct GNUNET_CRYPTO_AesInitializationVector
{
void
GNUNET_CRYPTO_aes_create_session_key (struct GNUNET_CRYPTO_AesSessionKey *key);
+
/**
* Check that a new session key is well-formed.
*
* safely cast to char*, a '\\0' termination is set).
*/
void
-GNUNET_CRYPTO_hash_to_enc (const GNUNET_HashCode * block,
+GNUNET_CRYPTO_hash_to_enc (const struct GNUNET_HashCode * block,
struct GNUNET_CRYPTO_HashAsciiEncoded *result);
/**
- * Convert ASCII encoding back to GNUNET_CRYPTO_hash
+ * Convert short hash to ASCII encoding.
+ *
+ * @param block the hash code
+ * @param result where to store the encoding (struct GNUNET_CRYPTO_ShortHashAsciiEncoded can be
+ * safely cast to char*, a '\\0' termination is set).
+ */
+void
+GNUNET_CRYPTO_short_hash_to_enc (const struct GNUNET_CRYPTO_ShortHashCode * block,
+ struct GNUNET_CRYPTO_ShortHashAsciiEncoded *result);
+
+
+/**
+ * Convert ASCII encoding back to a 'struct GNUNET_HashCode'
*
* @param enc the encoding
* @param enclen number of characters in 'enc' (without 0-terminator, which can be missing)
*/
int
GNUNET_CRYPTO_hash_from_string2 (const char *enc, size_t enclen,
- GNUNET_HashCode * result);
+ struct GNUNET_HashCode * result);
/**
- * Convert ASCII encoding back to GNUNET_CRYPTO_hash
+ * Convert ASCII encoding back to a 'struct GNUNET_CRYPTO_ShortHash'
+ *
* @param enc the encoding
+ * @param enclen number of characters in 'enc' (without 0-terminator, which can be missing)
* @param result where to store the GNUNET_CRYPTO_hash code
* @return GNUNET_OK on success, GNUNET_SYSERR if result has the wrong encoding
*/
+int
+GNUNET_CRYPTO_short_hash_from_string2 (const char *enc, size_t enclen,
+ struct GNUNET_CRYPTO_ShortHashCode * result);
+
+
+/**
+ * Convert ASCII encoding back to struct GNUNET_HashCode
+ *
+ * @param enc the encoding
+ * @param result where to store the hash code
+ * @return GNUNET_OK on success, GNUNET_SYSERR if result has the wrong encoding
+ */
#define GNUNET_CRYPTO_hash_from_string(enc, result) \
GNUNET_CRYPTO_hash_from_string2 (enc, strlen(enc), result)
+/**
+ * Convert ASCII encoding back to a 'struct GNUNET_CRYPTO_ShortHash'
+ *
+ * @param enc the encoding
+ * @param result where to store the GNUNET_CRYPTO_ShortHash
+ * @return GNUNET_OK on success, GNUNET_SYSERR if result has the wrong encoding
+ */
+#define GNUNET_CRYPTO_short_hash_from_string(enc, result) \
+ GNUNET_CRYPTO_short_hash_from_string2 (enc, strlen(enc), result)
+
+
+/**
+ * Compare function for ShortHashCodes, producing a total ordering
+ * of all hashcodes.
+ *
+ * @param h1 some hash code
+ * @param h2 some hash code
+ * @return 1 if h1 > h2, -1 if h1 < h2 and 0 if h1 == h2.
+ */
+int
+GNUNET_CRYPTO_short_hash_cmp (const struct GNUNET_CRYPTO_ShortHashCode * h1,
+ const struct GNUNET_CRYPTO_ShortHashCode * h2);
+
/**
* Compute the distance between 2 hashcodes.
* The computation must be fast, not involve
* @return number between 0 and UINT32_MAX
*/
uint32_t
-GNUNET_CRYPTO_hash_distance_u32 (const GNUNET_HashCode * a,
- const GNUNET_HashCode * b);
+GNUNET_CRYPTO_hash_distance_u32 (const struct GNUNET_HashCode * a,
+ const struct GNUNET_HashCode * b);
/**
* @param ret pointer to where to write the hashcode
*/
void
-GNUNET_CRYPTO_hash (const void *block, size_t size, GNUNET_HashCode * ret);
+GNUNET_CRYPTO_hash (const void *block, size_t size, struct GNUNET_HashCode * ret);
+
+
+/**
+ * Compute short (256-bit) hash of a given block.
+ *
+ * @param block the data to hash
+ * @param size size of the block
+ * @param ret pointer to where to write the hashcode
+ */
+void
+GNUNET_CRYPTO_short_hash (const void *block, size_t size,
+ struct GNUNET_CRYPTO_ShortHashCode * ret);
+
+
+/**
+ * Double short (256-bit) hash to create a long hash.
+ *
+ * @param sh short hash to double
+ * @param dh where to store the (doubled) long hash (not really a hash)
+ */
+void
+GNUNET_CRYPTO_short_hash_double (const struct GNUNET_CRYPTO_ShortHashCode *sh,
+ struct GNUNET_HashCode *dh);
+
+
+/**
+ * Truncate doubled short hash back to a short hash.
+ *
+ * @param dh doubled short hash to reduce again
+ * @param sh where to store the short hash
+ * @return GNUNET_OK on success, GNUNET_SYSERR if this was not a
+ * doubled short hash
+ */
+int
+GNUNET_CRYPTO_short_hash_from_truncation (const struct GNUNET_HashCode *dh,
+ struct GNUNET_CRYPTO_ShortHashCode *sh);
/**
void
GNUNET_CRYPTO_hmac (const struct GNUNET_CRYPTO_AuthKey *key,
const void *plaintext, size_t plaintext_len,
- GNUNET_HashCode * hmac);
+ struct GNUNET_HashCode * hmac);
/**
* @param res resulting hash, NULL on error
*/
typedef void (*GNUNET_CRYPTO_HashCompletedCallback) (void *cls,
- const GNUNET_HashCode *
+ const struct GNUNET_HashCode *
res);
*/
void
GNUNET_CRYPTO_hash_create_random (enum GNUNET_CRYPTO_Quality mode,
- GNUNET_HashCode * result);
+ struct GNUNET_HashCode * result);
/**
* @param result set to b - a
*/
void
-GNUNET_CRYPTO_hash_difference (const GNUNET_HashCode * a,
- const GNUNET_HashCode * b,
- GNUNET_HashCode * result);
+GNUNET_CRYPTO_hash_difference (const struct GNUNET_HashCode * a,
+ const struct GNUNET_HashCode * b,
+ struct GNUNET_HashCode * result);
/**
* @param result set to a + delta
*/
void
-GNUNET_CRYPTO_hash_sum (const GNUNET_HashCode * a,
- const GNUNET_HashCode * delta,
- GNUNET_HashCode * result);
+GNUNET_CRYPTO_hash_sum (const struct GNUNET_HashCode * a,
+ const struct GNUNET_HashCode * delta,
+ struct GNUNET_HashCode * result);
/**
* @param result set to a ^ b
*/
void
-GNUNET_CRYPTO_hash_xor (const GNUNET_HashCode * a, const GNUNET_HashCode * b,
- GNUNET_HashCode * result);
+GNUNET_CRYPTO_hash_xor (const struct GNUNET_HashCode * a, const struct GNUNET_HashCode * b,
+ struct GNUNET_HashCode * result);
/**
* @param iv set to a valid initialization vector
*/
void
-GNUNET_CRYPTO_hash_to_aes_key (const GNUNET_HashCode * hc,
+GNUNET_CRYPTO_hash_to_aes_key (const struct GNUNET_HashCode * hc,
struct GNUNET_CRYPTO_AesSessionKey *skey,
struct GNUNET_CRYPTO_AesInitializationVector
*iv);
* @return Bit \a bit from hashcode \a code, -1 for invalid index
*/
int
-GNUNET_CRYPTO_hash_get_bit (const GNUNET_HashCode * code, unsigned int bit);
+GNUNET_CRYPTO_hash_get_bit (const struct GNUNET_HashCode * code, unsigned int bit);
/**
* Determine how many low order bits match in two
- * GNUNET_HashCodes. i.e. - 010011 and 011111 share
+ * struct GNUNET_HashCodes. i.e. - 010011 and 011111 share
* the first two lowest order bits, and therefore the
* return value is two (NOT XOR distance, nor how many
* bits match absolutely!).
* @return the number of bits that match
*/
unsigned int
-GNUNET_CRYPTO_hash_matching_bits (const GNUNET_HashCode * first,
- const GNUNET_HashCode * second);
+GNUNET_CRYPTO_hash_matching_bits (const struct GNUNET_HashCode * first,
+ const struct GNUNET_HashCode * second);
/**
* @return 1 if h1 > h2, -1 if h1 < h2 and 0 if h1 == h2.
*/
int
-GNUNET_CRYPTO_hash_cmp (const GNUNET_HashCode * h1, const GNUNET_HashCode * h2);
+GNUNET_CRYPTO_hash_cmp (const struct GNUNET_HashCode * h1, const struct GNUNET_HashCode * h2);
/**
* @return -1 if h1 is closer, 1 if h2 is closer and 0 if h1==h2.
*/
int
-GNUNET_CRYPTO_hash_xorcmp (const GNUNET_HashCode * h1,
- const GNUNET_HashCode * h2,
- const GNUNET_HashCode * target);
+GNUNET_CRYPTO_hash_xorcmp (const struct GNUNET_HashCode * h1,
+ const struct GNUNET_HashCode * h2,
+ const struct GNUNET_HashCode * target);
/**
/**
- * Create a new private key. Caller must free return value.
+ * Convert a public key to a string.
*
- * @return fresh private key
+ * @param pub key to convert
+ * @return string representing 'pub'
*/
-struct GNUNET_CRYPTO_RsaPrivateKey *
-GNUNET_CRYPTO_rsa_key_create (void);
+char *
+GNUNET_CRYPTO_rsa_public_key_to_string (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *pub);
+
+
+/**
+ * Convert a string representing a public key to a public key.
+ *
+ * @param enc encoded public key
+ * @param enclen number of bytes in enc (without 0-terminator)
+ * @param pub where to store the public key
+ * @return GNUNET_OK on success
+ */
+int
+GNUNET_CRYPTO_rsa_public_key_from_string (const char *enc,
+ size_t enclen,
+ struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *pub);
+
/**
* Encode the private key in a format suitable for
* storing it into a file.
- * @returns encoding of the private key.
- * The first 4 bytes give the size of the array, as usual.
+ * @return encoding of the private key
*/
struct GNUNET_CRYPTO_RsaPrivateKeyBinaryEncoded *
GNUNET_CRYPTO_rsa_encode_key (const struct GNUNET_CRYPTO_RsaPrivateKey *hostkey);
+
/**
* Decode the private key from the data-format back
* to the "normal", internal format.
*
* @param buf the buffer where the private key data is stored
* @param len the length of the data in 'buffer'
+ * @return NULL on error
*/
struct GNUNET_CRYPTO_RsaPrivateKey *
GNUNET_CRYPTO_rsa_decode_key (const char *buf, uint16_t len);
+
/**
* Create a new private key by reading it from a file. If the
* files does not exist, create a new key and write it to the
* @param filename name of file to use for storage
* @return new private key, NULL on error (for example,
* permission denied)
+ * @deprecated use 'GNUNET_CRYPTO_rsa_key_create_start' instead
*/
struct GNUNET_CRYPTO_RsaPrivateKey *
GNUNET_CRYPTO_rsa_key_create_from_file (const char *filename);
+/**
+ * Handle to cancel private key generation.
+ */
+struct GNUNET_CRYPTO_RsaKeyGenerationContext;
+
+
+/**
+ * Function called upon completion of 'GNUNET_CRYPTO_rsa_key_create_async'.
+ *
+ * @param cls closure
+ * @param pk NULL on error, otherwise the private key (which must be free'd by the callee)
+ * @param emsg NULL on success, otherwise an error message
+ */
+typedef void (*GNUNET_CRYPTO_RsaKeyCallback)(void *cls,
+ struct GNUNET_CRYPTO_RsaPrivateKey *pk,
+ const char *emsg);
+
+
+/**
+ * Create a new private key by reading it from a file. If the files
+ * does not exist, create a new key and write it to the file. If the
+ * contents of the file are invalid the old file is deleted and a
+ * fresh key is created.
+ *
+ * @param filename name of file to use for storage
+ * @param cont function to call when done (or on errors)
+ * @param cont_cls closure for 'cont'
+ * @return handle to abort operation, NULL on fatal errors (cont will not be called if NULL is returned)
+ */
+struct GNUNET_CRYPTO_RsaKeyGenerationContext *
+GNUNET_CRYPTO_rsa_key_create_start (const char *filename,
+ GNUNET_CRYPTO_RsaKeyCallback cont,
+ void *cont_cls);
+
+
+/**
+ * Abort RSA key generation.
+ *
+ * @param gc key generation context to abort
+ */
+void
+GNUNET_CRYPTO_rsa_key_create_stop (struct GNUNET_CRYPTO_RsaKeyGenerationContext *gc);
+
+
/**
* Setup a hostkey file for a peer given the name of the
* configuration file (!). This function is used so that
* @param cfg_name name of the configuration file to use
*/
void
-GNUNET_CRYPTO_setup_hostkey (const char *cfg_name);
+GNUNET_CRYPTO_rsa_setup_hostkey (const char *cfg_name);
/**
* @return some private key purely dependent on input
*/
struct GNUNET_CRYPTO_RsaPrivateKey *
-GNUNET_CRYPTO_rsa_key_create_from_hash (const GNUNET_HashCode * hc);
+GNUNET_CRYPTO_rsa_key_create_from_hash (const struct GNUNET_HashCode *hc);
/**
* Free memory occupied by the private key.
- * @param hostkey pointer to the memory to free
+ *
+ * @param key pointer to the memory to free
*/
void
-GNUNET_CRYPTO_rsa_key_free (struct GNUNET_CRYPTO_RsaPrivateKey *hostkey);
+GNUNET_CRYPTO_rsa_key_free (struct GNUNET_CRYPTO_RsaPrivateKey *key);
/**
+/**
+ * Function called upon completion of 'GNUNET_CRYPTO_ecc_key_create_async'.
+ *
+ * @param cls closure
+ * @param pk NULL on error, otherwise the private key (which must be free'd by the callee)
+ * @param emsg NULL on success, otherwise an error message
+ */
+typedef void (*GNUNET_CRYPTO_EccKeyCallback)(void *cls,
+ struct GNUNET_CRYPTO_EccPrivateKey *pk,
+ const char *emsg);
+
+
+/**
+ * Free memory occupied by ECC key
+ *
+ * @param privatekey pointer to the memory to free
+ */
+void
+GNUNET_CRYPTO_ecc_key_free (struct GNUNET_CRYPTO_EccPrivateKey *privatekey);
+
+
+/**
+ * Extract the public key for the given private key.
+ *
+ * @param priv the private key
+ * @param pub where to write the public key
+ */
+void
+GNUNET_CRYPTO_ecc_key_get_public (const struct GNUNET_CRYPTO_EccPrivateKey *priv,
+ struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded *pub);
+
+/**
+ * Convert a public key to a string.
+ *
+ * @param pub key to convert
+ * @return string representing 'pub'
+ */
+char *
+GNUNET_CRYPTO_ecc_public_key_to_string (struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded *pub);
+
+
+/**
+ * Convert a string representing a public key to a public key.
+ *
+ * @param enc encoded public key
+ * @param enclen number of bytes in enc (without 0-terminator)
+ * @param pub where to store the public key
+ * @return GNUNET_OK on success
+ */
+int
+GNUNET_CRYPTO_ecc_public_key_from_string (const char *enc,
+ size_t enclen,
+ struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded *pub);
+
+
+/**
+ * Encode the private key in a format suitable for
+ * storing it into a file.
+ *
+ * @param key key to encode
+ * @return encoding of the private key.
+ * The first 4 bytes give the size of the array, as usual.
+ */
+struct GNUNET_CRYPTO_EccPrivateKeyBinaryEncoded *
+GNUNET_CRYPTO_ecc_encode_key (const struct GNUNET_CRYPTO_EccPrivateKey *key);
+
+
+/**
+ * Decode the private key from the file-format back
+ * to the "normal", internal format.
+ *
+ * @param buf the buffer where the private key data is stored
+ * @param len the length of the data in 'buffer'
+ * @return NULL on error
+ */
+struct GNUNET_CRYPTO_EccPrivateKey *
+GNUNET_CRYPTO_ecc_decode_key (const char *buf,
+ size_t len);
+
+
+/**
+ * Create a new private key by reading it from a file. If the
+ * files does not exist, create a new key and write it to the
+ * file. Caller must free return value. Note that this function
+ * can not guarantee that another process might not be trying
+ * the same operation on the same file at the same time.
+ * If the contents of the file
+ * are invalid the old file is deleted and a fresh key is
+ * created.
+ *
+ * @return new private key, NULL on error (for example,
+ * permission denied)
+ */
+struct GNUNET_CRYPTO_EccPrivateKey *
+GNUNET_CRYPTO_ecc_key_create_from_file (const char *filename);
+
+
+/**
+ * Handle to cancel private key generation and state for the
+ * key generation operation.
+ */
+struct GNUNET_CRYPTO_EccKeyGenerationContext;
+
+
+/**
+ * Create a new private key by reading it from a file. If the files
+ * does not exist, create a new key and write it to the file. If the
+ * contents of the file are invalid the old file is deleted and a
+ * fresh key is created.
+ *
+ * @param filename name of file to use for storage
+ * @param cont function to call when done (or on errors)
+ * @param cont_cls closure for 'cont'
+ * @return handle to abort operation, NULL on fatal errors (cont will not be called if NULL is returned)
+ */
+struct GNUNET_CRYPTO_EccKeyGenerationContext *
+GNUNET_CRYPTO_ecc_key_create_start (const char *filename,
+ GNUNET_CRYPTO_EccKeyCallback cont,
+ void *cont_cls);
+
+
+/**
+ * Abort ECC key generation.
+ *
+ * @param gc key generation context to abort
+ */
+void
+GNUNET_CRYPTO_ecc_key_create_stop (struct GNUNET_CRYPTO_EccKeyGenerationContext *gc);
+
+/**
+ * Setup a hostkey file for a peer given the name of the
+ * configuration file (!). This function is used so that
+ * at a later point code can be certain that reading a
+ * hostkey is fast (for example in time-dependent testcases).
+ *
+ * @param cfg_name name of the configuration file to use
+ */
+void
+GNUNET_CRYPTO_ecc_setup_hostkey (const char *cfg_name);
+
+
+/**
+ * Sign a given block.
+ *
+ * @param key private key to use for the signing
+ * @param purpose what to sign (size, purpose)
+ * @param sig where to write the signature
+ * @return GNUNET_SYSERR on error, GNUNET_OK on success
+ */
+int
+GNUNET_CRYPTO_ecc_sign (const struct GNUNET_CRYPTO_EccPrivateKey *key,
+ const struct GNUNET_CRYPTO_EccSignaturePurpose *purpose,
+ struct GNUNET_CRYPTO_EccSignature *sig);
+
+
+/**
+ * Verify signature.
+ *
+ * @param purpose what is the purpose that the signature should have?
+ * @param validate block to validate (size, purpose, data)
+ * @param sig signature that is being validated
+ * @param publicKey public key of the signer
+ * @returns GNUNET_OK if ok, GNUNET_SYSERR if invalid
+ */
+int
+GNUNET_CRYPTO_ecc_verify (uint32_t purpose,
+ const struct GNUNET_CRYPTO_EccSignaturePurpose
+ *validate,
+ const struct GNUNET_CRYPTO_EccSignature *sig,
+ const struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded
+ *publicKey);
+
+
/**
* This function should only be called in testcases
* where strong entropy gathering is not desired
void
GNUNET_CRYPTO_random_disable_entropy_gathering (void);
+
+/**
+ * Check if we are using weak random number generation.
+ *
+ * @return GNUNET_YES if weak number generation is on
+ * (thus will return YES if 'GNUNET_CRYPTO_random_disable_entropy_gathering'
+ * was called previously).
+ */
+int
+GNUNET_CRYPTO_random_is_weak (void);
+
+
#if 0 /* keep Emacsens' auto-indent happy */
{
#endif
projects / oweals / gnunet.git / blobdiff