Added stand-alone RSA/PSS implementation.
This commit is contained in:
Thomas Pornin
parent
966078b337
commit
420f50c213
17 changed files with 1614 additions and 77 deletions
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@ -28,6 +28,7 @@
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#include <stddef.h>
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#include <stdint.h>
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#include "bearssl_hash.h"
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#include "bearssl_rand.h"
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#ifdef __cplusplus
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@ -279,6 +280,55 @@ typedef uint32_t (*br_rsa_pkcs1_vrfy)(const unsigned char *x, size_t xlen,
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const unsigned char *hash_oid, size_t hash_len,
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const br_rsa_public_key *pk, unsigned char *hash_out);
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/**
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* \brief Type for a RSA signature verification engine (PSS).
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*
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* Parameters are:
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*
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* - The signature itself. The provided array is NOT modified.
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*
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* - The hash function which was used to hash the message.
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*
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* - The hash function to use with MGF1 within the PSS padding. This
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* is not necessarily the same hash function as the one which was
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* used to hash the signed message.
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*
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* - The hashed message (as an array of bytes).
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*
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* - The PSS salt length (in bytes).
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*
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* - The public key.
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*
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* **Constraints:**
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*
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* - Hash message length MUST be no more than 64 bytes.
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*
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* Note that, contrary to PKCS#1 v1.5 signature, the hash value of the
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* signed data cannot be extracted from the signature; it must be
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* provided to the verification function.
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*
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* This function verifies that the signature length (`xlen`) matches the
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* modulus length (this function returns 0 on mismatch). If the modulus
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* size exceeds the maximum supported RSA size, then the function also
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* returns 0.
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*
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* Returned value is 1 on success, 0 on error.
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*
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* Implementations of this type need not be constant-time.
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*
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* \param x signature buffer.
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* \param xlen signature length (in bytes).
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* \param hf_data hash function applied on the message.
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* \param hf_mgf1 hash function to use with MGF1.
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* \param hash hash value of the signed message.
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* \param salt_len PSS salt length (in bytes).
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* \param pk RSA public key.
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* \return 1 on success, 0 on error.
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*/
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typedef uint32_t (*br_rsa_pss_vrfy)(const unsigned char *x, size_t xlen,
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const br_hash_class *hf_data, const br_hash_class *hf_mgf1,
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const void *hash, size_t salt_len, const br_rsa_public_key *pk);
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/**
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* \brief Type for a RSA encryption engine (OAEP).
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*
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@ -385,6 +435,53 @@ typedef uint32_t (*br_rsa_pkcs1_sign)(const unsigned char *hash_oid,
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const unsigned char *hash, size_t hash_len,
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const br_rsa_private_key *sk, unsigned char *x);
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/**
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* \brief Type for a RSA signature generation engine (PSS).
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*
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* Parameters are:
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*
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* - An initialized PRNG for salt generation. If the salt length is
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* zero (`salt_len` parameter), then the PRNG is optional (this is
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* not the typical case, as the security proof of RSA/PSS is
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* tighter when a non-empty salt is used).
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*
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* - The hash function which was used to hash the message.
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*
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* - The hash function to use with MGF1 within the PSS padding. This
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* is not necessarily the same function as the one used to hash the
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* message.
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*
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* - The hashed message.
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*
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* - The salt length, in bytes.
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*
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* - The RSA private key.
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*
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* - The output buffer, that receives the signature.
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*
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* Returned value is 1 on success, 0 on error. Error conditions include
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* a too small modulus for the provided hash and salt lengths, or some
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* invalid key parameters. The signature length is exactly
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* `(sk->n_bitlen+7)/8` bytes.
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*
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* This function is expected to be constant-time with regards to the
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* private key bytes (lengths of the modulus and the individual factors
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* may leak, though) and to the hashed data.
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*
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* \param rng PRNG for salt generation (`NULL` if `salt_len` is zero).
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* \param hf_data hash function used to hash the signed data.
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* \param hf_mgf1 hash function to use with MGF1.
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* \param hash hashed message.
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* \param salt_len salt length (in bytes).
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* \param sk RSA private key.
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* \param x output buffer for the signature value.
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* \return 1 on success, 0 on error.
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*/
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typedef uint32_t (*br_rsa_pss_sign)(const br_prng_class **rng,
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const br_hash_class *hf_data, const br_hash_class *hf_mgf1,
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const unsigned char *hash_value, size_t salt_len,
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const br_rsa_private_key *sk, unsigned char *x);
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/**
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* \brief Encoded OID for SHA-1 (in RSA PKCS#1 signatures).
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*/
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@ -476,7 +573,7 @@ uint32_t br_rsa_i32_public(unsigned char *x, size_t xlen,
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const br_rsa_public_key *pk);
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/**
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* \brief RSA signature verification engine "i32".
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* \brief RSA signature verification engine "i32" (PKCS#1 v1.5 signatures).
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*
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* \see br_rsa_pkcs1_vrfy
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*
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@ -492,6 +589,24 @@ uint32_t br_rsa_i32_pkcs1_vrfy(const unsigned char *x, size_t xlen,
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const unsigned char *hash_oid, size_t hash_len,
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const br_rsa_public_key *pk, unsigned char *hash_out);
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/**
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* \brief RSA signature verification engine "i32" (PSS signatures).
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*
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* \see br_rsa_pss_vrfy
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*
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* \param x signature buffer.
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* \param xlen signature length (in bytes).
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* \param hf_data hash function applied on the message.
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* \param hf_mgf1 hash function to use with MGF1.
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* \param hash hash value of the signed message.
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* \param salt_len PSS salt length (in bytes).
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* \param pk RSA public key.
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* \return 1 on success, 0 on error.
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*/
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uint32_t br_rsa_i32_pss_vrfy(const unsigned char *x, size_t xlen,
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const br_hash_class *hf_data, const br_hash_class *hf_mgf1,
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const void *hash, size_t salt_len, const br_rsa_public_key *pk);
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/**
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* \brief RSA private key engine "i32".
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*
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@ -505,7 +620,7 @@ uint32_t br_rsa_i32_private(unsigned char *x,
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const br_rsa_private_key *sk);
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/**
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* \brief RSA signature generation engine "i32".
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* \brief RSA signature generation engine "i32" (PKCS#1 v1.5 signatures).
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*
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* \see br_rsa_pkcs1_sign
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*
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@ -520,6 +635,25 @@ uint32_t br_rsa_i32_pkcs1_sign(const unsigned char *hash_oid,
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const unsigned char *hash, size_t hash_len,
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const br_rsa_private_key *sk, unsigned char *x);
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/**
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* \brief RSA signature generation engine "i32" (PSS signatures).
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*
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* \see br_rsa_pss_sign
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*
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* \param rng PRNG for salt generation (`NULL` if `salt_len` is zero).
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* \param hf_data hash function used to hash the signed data.
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* \param hf_mgf1 hash function to use with MGF1.
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* \param hash hashed message.
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* \param salt_len salt length (in bytes).
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* \param sk RSA private key.
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* \param x output buffer for the signature value.
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* \return 1 on success, 0 on error.
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*/
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uint32_t br_rsa_i32_pss_sign(const br_prng_class **rng,
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const br_hash_class *hf_data, const br_hash_class *hf_mgf1,
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const unsigned char *hash_value, size_t salt_len,
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const br_rsa_private_key *sk, unsigned char *x);
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/*
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* RSA "i31" engine. Similar to i32, but only 31 bits are used per 32-bit
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* word. This uses slightly more stack space (about 4% more) and code
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@ -540,7 +674,7 @@ uint32_t br_rsa_i31_public(unsigned char *x, size_t xlen,
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const br_rsa_public_key *pk);
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/**
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* \brief RSA signature verification engine "i31".
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* \brief RSA signature verification engine "i31" (PKCS#1 v1.5 signatures).
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*
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* \see br_rsa_pkcs1_vrfy
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*
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@ -556,6 +690,24 @@ uint32_t br_rsa_i31_pkcs1_vrfy(const unsigned char *x, size_t xlen,
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const unsigned char *hash_oid, size_t hash_len,
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const br_rsa_public_key *pk, unsigned char *hash_out);
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/**
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* \brief RSA signature verification engine "i31" (PSS signatures).
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*
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* \see br_rsa_pss_vrfy
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*
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* \param x signature buffer.
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* \param xlen signature length (in bytes).
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* \param hf_data hash function applied on the message.
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* \param hf_mgf1 hash function to use with MGF1.
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* \param hash hash value of the signed message.
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* \param salt_len PSS salt length (in bytes).
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* \param pk RSA public key.
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* \return 1 on success, 0 on error.
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*/
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uint32_t br_rsa_i31_pss_vrfy(const unsigned char *x, size_t xlen,
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const br_hash_class *hf_data, const br_hash_class *hf_mgf1,
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const void *hash, size_t salt_len, const br_rsa_public_key *pk);
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/**
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* \brief RSA private key engine "i31".
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*
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@ -569,7 +721,7 @@ uint32_t br_rsa_i31_private(unsigned char *x,
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const br_rsa_private_key *sk);
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/**
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* \brief RSA signature generation engine "i31".
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* \brief RSA signature generation engine "i31" (PKCS#1 v1.5 signatures).
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*
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* \see br_rsa_pkcs1_sign
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*
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@ -584,6 +736,25 @@ uint32_t br_rsa_i31_pkcs1_sign(const unsigned char *hash_oid,
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const unsigned char *hash, size_t hash_len,
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const br_rsa_private_key *sk, unsigned char *x);
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/**
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* \brief RSA signature generation engine "i31" (PSS signatures).
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*
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* \see br_rsa_pss_sign
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*
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* \param rng PRNG for salt generation (`NULL` if `salt_len` is zero).
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* \param hf_data hash function used to hash the signed data.
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* \param hf_mgf1 hash function to use with MGF1.
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* \param hash hashed message.
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* \param salt_len salt length (in bytes).
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* \param sk RSA private key.
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* \param x output buffer for the signature value.
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* \return 1 on success, 0 on error.
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*/
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uint32_t br_rsa_i31_pss_sign(const br_prng_class **rng,
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const br_hash_class *hf_data, const br_hash_class *hf_mgf1,
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const unsigned char *hash_value, size_t salt_len,
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const br_rsa_private_key *sk, unsigned char *x);
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/*
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* RSA "i62" engine. Similar to i31, but internal multiplication use
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* 64x64->128 multiplications. This is available only on architecture
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@ -608,7 +779,7 @@ uint32_t br_rsa_i62_public(unsigned char *x, size_t xlen,
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const br_rsa_public_key *pk);
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/**
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* \brief RSA signature verification engine "i62".
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* \brief RSA signature verification engine "i62" (PKCS#1 v1.5 signatures).
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*
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* This function is defined only on architecture that offer a 64x64->128
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* opcode. Use `br_rsa_i62_pkcs1_vrfy_get()` to dynamically obtain a pointer
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@ -628,6 +799,28 @@ uint32_t br_rsa_i62_pkcs1_vrfy(const unsigned char *x, size_t xlen,
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const unsigned char *hash_oid, size_t hash_len,
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const br_rsa_public_key *pk, unsigned char *hash_out);
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/**
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* \brief RSA signature verification engine "i62" (PSS signatures).
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*
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* This function is defined only on architecture that offer a 64x64->128
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* opcode. Use `br_rsa_i62_pss_vrfy_get()` to dynamically obtain a pointer
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* to that function.
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*
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* \see br_rsa_pss_vrfy
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*
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* \param x signature buffer.
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* \param xlen signature length (in bytes).
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* \param hf_data hash function applied on the message.
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* \param hf_mgf1 hash function to use with MGF1.
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* \param hash hash value of the signed message.
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* \param salt_len PSS salt length (in bytes).
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* \param pk RSA public key.
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* \return 1 on success, 0 on error.
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*/
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uint32_t br_rsa_i62_pss_vrfy(const unsigned char *x, size_t xlen,
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const br_hash_class *hf_data, const br_hash_class *hf_mgf1,
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const void *hash, size_t salt_len, const br_rsa_public_key *pk);
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/**
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* \brief RSA private key engine "i62".
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*
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@ -645,7 +838,7 @@ uint32_t br_rsa_i62_private(unsigned char *x,
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const br_rsa_private_key *sk);
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/**
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* \brief RSA signature generation engine "i62".
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* \brief RSA signature generation engine "i62" (PKCS#1 v1.5 signatures).
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*
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* This function is defined only on architecture that offer a 64x64->128
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* opcode. Use `br_rsa_i62_pkcs1_sign_get()` to dynamically obtain a pointer
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@ -664,6 +857,29 @@ uint32_t br_rsa_i62_pkcs1_sign(const unsigned char *hash_oid,
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const unsigned char *hash, size_t hash_len,
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const br_rsa_private_key *sk, unsigned char *x);
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/**
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* \brief RSA signature generation engine "i62" (PSS signatures).
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*
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* This function is defined only on architecture that offer a 64x64->128
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* opcode. Use `br_rsa_i62_pss_sign_get()` to dynamically obtain a pointer
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* to that function.
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*
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* \see br_rsa_pss_sign
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*
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* \param rng PRNG for salt generation (`NULL` if `salt_len` is zero).
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* \param hf_data hash function used to hash the signed data.
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* \param hf_mgf1 hash function to use with MGF1.
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* \param hash hashed message.
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* \param salt_len salt length (in bytes).
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* \param sk RSA private key.
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* \param x output buffer for the signature value.
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* \return 1 on success, 0 on error.
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*/
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uint32_t br_rsa_i62_pss_sign(const br_prng_class **rng,
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const br_hash_class *hf_data, const br_hash_class *hf_mgf1,
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const unsigned char *hash_value, size_t salt_len,
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const br_rsa_private_key *sk, unsigned char *x);
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/**
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* \brief Get the RSA "i62" implementation (public key operations),
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* if available.
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@ -673,13 +889,21 @@ uint32_t br_rsa_i62_pkcs1_sign(const unsigned char *hash_oid,
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br_rsa_public br_rsa_i62_public_get(void);
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/**
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* \brief Get the RSA "i62" implementation (PKCS#1 signature verification),
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* \brief Get the RSA "i62" implementation (PKCS#1 v1.5 signature verification),
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* if available.
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*
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* \return the implementation, or 0.
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*/
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br_rsa_pkcs1_vrfy br_rsa_i62_pkcs1_vrfy_get(void);
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/**
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* \brief Get the RSA "i62" implementation (PSS signature verification),
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* if available.
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*
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* \return the implementation, or 0.
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*/
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br_rsa_pss_vrfy br_rsa_i62_pss_vrfy_get(void);
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/**
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* \brief Get the RSA "i62" implementation (private key operations),
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* if available.
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@ -689,13 +913,21 @@ br_rsa_pkcs1_vrfy br_rsa_i62_pkcs1_vrfy_get(void);
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br_rsa_private br_rsa_i62_private_get(void);
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/**
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* \brief Get the RSA "i62" implementation (PKCS#1 signature generation),
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* \brief Get the RSA "i62" implementation (PKCS#1 v1.5 signature generation),
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* if available.
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*
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* \return the implementation, or 0.
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*/
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br_rsa_pkcs1_sign br_rsa_i62_pkcs1_sign_get(void);
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/**
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* \brief Get the RSA "i62" implementation (PSS signature generation),
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* if available.
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*
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* \return the implementation, or 0.
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*/
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br_rsa_pss_sign br_rsa_i62_pss_sign_get(void);
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/**
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* \brief Get the RSA "i62" implementation (OAEP encryption),
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* if available.
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@ -732,7 +964,7 @@ uint32_t br_rsa_i15_public(unsigned char *x, size_t xlen,
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const br_rsa_public_key *pk);
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/**
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* \brief RSA signature verification engine "i15".
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* \brief RSA signature verification engine "i15" (PKCS#1 v1.5 signatures).
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*
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* \see br_rsa_pkcs1_vrfy
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*
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@ -748,6 +980,24 @@ uint32_t br_rsa_i15_pkcs1_vrfy(const unsigned char *x, size_t xlen,
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const unsigned char *hash_oid, size_t hash_len,
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const br_rsa_public_key *pk, unsigned char *hash_out);
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/**
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* \brief RSA signature verification engine "i15" (PSS signatures).
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*
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* \see br_rsa_pss_vrfy
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*
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* \param x signature buffer.
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* \param xlen signature length (in bytes).
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* \param hf_data hash function applied on the message.
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* \param hf_mgf1 hash function to use with MGF1.
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* \param hash hash value of the signed message.
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* \param salt_len PSS salt length (in bytes).
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* \param pk RSA public key.
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* \return 1 on success, 0 on error.
|
||||
*/
|
||||
uint32_t br_rsa_i15_pss_vrfy(const unsigned char *x, size_t xlen,
|
||||
const br_hash_class *hf_data, const br_hash_class *hf_mgf1,
|
||||
const void *hash, size_t salt_len, const br_rsa_public_key *pk);
|
||||
|
||||
/**
|
||||
* \brief RSA private key engine "i15".
|
||||
*
|
||||
|
|
@ -761,7 +1011,7 @@ uint32_t br_rsa_i15_private(unsigned char *x,
|
|||
const br_rsa_private_key *sk);
|
||||
|
||||
/**
|
||||
* \brief RSA signature generation engine "i15".
|
||||
* \brief RSA signature generation engine "i15" (PKCS#1 v1.5 signatures).
|
||||
*
|
||||
* \see br_rsa_pkcs1_sign
|
||||
*
|
||||
|
|
@ -776,6 +1026,25 @@ uint32_t br_rsa_i15_pkcs1_sign(const unsigned char *hash_oid,
|
|||
const unsigned char *hash, size_t hash_len,
|
||||
const br_rsa_private_key *sk, unsigned char *x);
|
||||
|
||||
/**
|
||||
* \brief RSA signature generation engine "i15" (PSS signatures).
|
||||
*
|
||||
* \see br_rsa_pss_sign
|
||||
*
|
||||
* \param rng PRNG for salt generation (`NULL` if `salt_len` is zero).
|
||||
* \param hf_data hash function used to hash the signed data.
|
||||
* \param hf_mgf1 hash function to use with MGF1.
|
||||
* \param hash hashed message.
|
||||
* \param salt_len salt length (in bytes).
|
||||
* \param sk RSA private key.
|
||||
* \param x output buffer for the signature value.
|
||||
* \return 1 on success, 0 on error.
|
||||
*/
|
||||
uint32_t br_rsa_i15_pss_sign(const br_prng_class **rng,
|
||||
const br_hash_class *hf_data, const br_hash_class *hf_mgf1,
|
||||
const unsigned char *hash_value, size_t salt_len,
|
||||
const br_rsa_private_key *sk, unsigned char *x);
|
||||
|
||||
/**
|
||||
* \brief Get "default" RSA implementation (public-key operations).
|
||||
*
|
||||
|
|
@ -797,7 +1066,7 @@ br_rsa_public br_rsa_public_get_default(void);
|
|||
br_rsa_private br_rsa_private_get_default(void);
|
||||
|
||||
/**
|
||||
* \brief Get "default" RSA implementation (PKCS#1 signature verification).
|
||||
* \brief Get "default" RSA implementation (PKCS#1 v1.5 signature verification).
|
||||
*
|
||||
* This returns the preferred implementation of RSA (signature verification)
|
||||
* on the current system.
|
||||
|
|
@ -807,7 +1076,17 @@ br_rsa_private br_rsa_private_get_default(void);
|
|||
br_rsa_pkcs1_vrfy br_rsa_pkcs1_vrfy_get_default(void);
|
||||
|
||||
/**
|
||||
* \brief Get "default" RSA implementation (PKCS#1 signature generation).
|
||||
* \brief Get "default" RSA implementation (PSS signature verification).
|
||||
*
|
||||
* This returns the preferred implementation of RSA (signature verification)
|
||||
* on the current system.
|
||||
*
|
||||
* \return the default implementation.
|
||||
*/
|
||||
br_rsa_pss_vrfy br_rsa_pss_vrfy_get_default(void);
|
||||
|
||||
/**
|
||||
* \brief Get "default" RSA implementation (PKCS#1 v1.5 signature generation).
|
||||
*
|
||||
* This returns the preferred implementation of RSA (signature generation)
|
||||
* on the current system.
|
||||
|
|
@ -816,6 +1095,16 @@ br_rsa_pkcs1_vrfy br_rsa_pkcs1_vrfy_get_default(void);
|
|||
*/
|
||||
br_rsa_pkcs1_sign br_rsa_pkcs1_sign_get_default(void);
|
||||
|
||||
/**
|
||||
* \brief Get "default" RSA implementation (PSS signature generation).
|
||||
*
|
||||
* This returns the preferred implementation of RSA (signature generation)
|
||||
* on the current system.
|
||||
*
|
||||
* \return the default implementation.
|
||||
*/
|
||||
br_rsa_pss_sign br_rsa_pss_sign_get_default(void);
|
||||
|
||||
/**
|
||||
* \brief Get "default" RSA implementation (OAEP encryption).
|
||||
*
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue